Research Interests:
Research Interests:
Riset ini bermaksud untuk mengetahui pengaruh variasi kedalaman pemotongan serta kecepatan pemotongan atas nilai kekasaran permukaan aluminium 7075. kesimpulan kecepatan pemotongan berpengaruh atas nilai kekasaran permukaan spesimen.... more
Riset ini bermaksud untuk mengetahui pengaruh variasi kedalaman pemotongan serta kecepatan pemotongan atas nilai kekasaran permukaan aluminium 7075. kesimpulan kecepatan pemotongan berpengaruh atas nilai kekasaran permukaan spesimen. Bertambahnya kecepatan pemotongan yang dipakai meangkibatkan kualitas makin rendah (halus). Kedalaman pemotongan yang tinggi menyebabkan menurunnya gaya pemotongan, setiap kedalaman pemotongan yang dipakai terdapat selisih nilai kekasaran permukaan spesimen. Makin besar kedalaman pemotongan yang dipakai mengakibatkan meningkatnya kekasaran permukaan, ketika kombinasi dari kecepatan pemotongan serta kedalaman pemotongan terlihat hasil yang paling rendah (halus) pada kecepatan pemotongan 14.7 m/menit serta 0,5 mm, sedangkan kekasaran paling tinggi (kasar) pada kecepatan pemotongan 11.3 m/menit serta perbandingan kedalaman pemotongan 1. mm. Semakin tinggi kecepatan pemotongan maka semakin rendah (halus) tingkat kekasaran dan kedalaman pemotongan yang dalam...
Development problems in Indonesia are divided into two major parts, namely the problem of development objects and the problem of subjects who will carry out development. Problems originating from the subject of development are in terms of... more
Development problems in Indonesia are divided into two major parts, namely the problem of development objects and the problem of subjects who will carry out development. Problems originating from the subject of development are in terms of land acquisition. Thus, land acquisition efforts for these purposes need to be handled properly and carried out by taking into account the role of land in human life and the principle of respect for legal rights to land. The Public Works and Spatial Planning Office of South Kalimantan Province has planned the development area of the government center in Banjarbaru City. One of them is the design of a more representative sports area. In 2022 and 2023, the land acquisition of the Integrated Sports Area Phase I and II has been carried out together with the implementation team of the South Kalimantan Provincial BPN Office. In connection with this achievement, this research is important because the land acquisition process is related to project producti...
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The use of fossil fuels in transportation equipment, especially motorized vehicles, will have an extraordinary effect on air pollution. Therefore, air pollution becomes very important problem today. The amount of percentage of air... more
The use of fossil fuels in transportation equipment, especially motorized vehicles, will have an extraordinary effect on air pollution. Therefore, air pollution becomes very important problem today. The amount of percentage of air pollution from transportation sources in Indonesia is 70.5 % CO, 18.34 % HC, 8.89 % NOx, 0.88 % SOx, and 1.33 % particulate matter. Given the danger of exhaust emissions, especially carbon monoxide which can cause death for humans who inhale it, therefore efforts are needed to control air pollution from motorized vehicles. There are several methods that can be used, one of which is to use adsorbents. Activated carbon can be used as an adsorbent. One alternative that can be applied as an adsorbent is peat soil-activated carbon which is abundant and easy to make as an adsorbent. By utilizing the abundant peat-soil which is a great potential area of Banjarmasin, South Kalimantan. In this experimental study; model l has a diameter of 20 mm, model 2 has an outs...
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The performance audit by the Badan Pengawasan Keuangan dan Pembangunan (BPKP) in 2020 resulted in several evaluations that must be carried out immediately by the PDAM Tanah Laut regency, one of which is the absence of asset management... more
The performance audit by the Badan Pengawasan Keuangan dan Pembangunan (BPKP) in 2020 resulted in several evaluations that must be carried out immediately by the PDAM Tanah Laut regency, one of which is the absence of asset management policies that have not considered the risk of asset operational failure. The rate of water leakage (non revenue water) was found to be still higher than the standard of 25% at 32.01%. The high nrw is certainly related to the company's critical assets, namely network pipes and physical assets. In addition, mitigation is needed on the management of assets that have the potential to occur risks. This study aims to identify potential risks, identify potential risks, identify and determine dominant risks and provide risk mitigation recommendations on PDAM infrastructure assets in Tanah Laut Regency. Risk analysis uses probability impact matrix (PIM) risk assessment and Pareto diagram. This study resulted in a respondent's perception of 59.17% with a...
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Research Interests:
Sistem kerja pendingin di PT. Indocement Tunggal Prakarsa Tbk Tarjun Plant-12 menggunakan cooling tower marley fan 3 tipe mechanical draft, counterflow flow 10.221 m3/h yang berfungsi untuk mendinginkan air keluaran dari kondensor melalui... more
Sistem kerja pendingin di PT. Indocement Tunggal Prakarsa Tbk Tarjun Plant-12 menggunakan cooling tower marley fan 3 tipe mechanical draft, counterflow flow 10.221 m3/h yang berfungsi untuk mendinginkan air keluaran dari kondensor melalui nozzle untuk menyemprotkannya dengan menyemprotkan sebagian air ke udara dan mengeluarkannya ke atmosfer, sehingga air jatuh ke bak air melalui eliminator melayang. Suhu lingkungan mempengaruhi kinerja menara pendingin. Semakin dingin lingkungan semakin baik kinerja menara pendingin. Pengaruh suhu lingkungan dan kinerja pada menara pendingin menjadi pembahasan dalam penelitian ini. Hasil perhitungan dalam penelitian menunjukkan bahwa suhu lingkungan mempengaruhi kinerja menara pendingin dimana pada pagi sampai sore hari pada suhu atau cuaca tertentu kinerja menara pendingin mengalami peningkatan dan penurunan yang signifikan. Sedangkan efisiensi rata-rata range dan approach dari tahun 2016 hingga 2019 mengalami penurunan efisiensi sebesar 8,44%, pe...
Research Interests: Physics and Cooling Tower
Minimizing construction waste can help achieve the environmental, economic, and social benefits of sustainable construction. Types of waste may include those known as non-value adding activities. Studies on the effects of construction... more
Minimizing construction waste can help achieve the environmental, economic, and social benefits of sustainable construction. Types of waste may include those known as non-value adding activities. Studies on the effects of construction waste on project performance are important to enable mitigation actions. Most of such studies, however, are based on perception surveys. This has led to problems in deriving valid information using parametric methods during the statistical analysis of the response. These problems are mainly related to the assumptions concerning the underlying distribution and the categorical nature of the data. This paper explores a class of nonparametric methods for analyzing survey data concerning the effects of construction waste on project performance. It includes a number of nonparametric tests and post-hoc procedures for repeated measures. Data concerning seven types of construction waste on the generation of material waste from past study are used for this purpo...
Electrical energy is the dominant energy needed for human life. One source of electricity income is Steam Power Plant (PLTU). With an installed capacity of 4 x65 MW for public transportation, each unit of acid acid plant has one... more
Electrical energy is the dominant energy needed for human life. One source of electricity income is Steam Power Plant (PLTU). With an installed capacity of 4 x65 MW for public transportation, each unit of acid acid plant has one boiler with 1 economizer as a means of boiler efficiency enhancer by absorbing hot flue gas. To avoid it then in need of maximum care to components of economizer. To see the effectiveness of the economizer it is necessary to observe the economizer. This study aims to analyze the effectiveness of the economizer. From the results of the boiler efficiency study from March 27, 2017 to April 10, 2017 with a total average efficiency in the analysis of 81.93%. With the highest efficiency on date On March 29, 2017 the efficiency calculated was 83.42% at 02:00. And the lowest on April 2, 2017, an 80.32% efficiency at 09:00. The factor that influences the efficiency ratio is the temperature difference between the incoming gas gas furnace (T_ (h, i)), exit (T_ (h, ...
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Gland Steam Condensor (GSC) adalah alat penukar panas yang mengembunkan uap dari segel poros turbin. Steam bekas ini akan memanaskan air kondensat dari pompa kondensat yang dialirkan melintasi kondensor Gland Steam. Karena panas diserap... more
Gland Steam Condensor (GSC) adalah alat penukar panas yang mengembunkan uap dari segel poros turbin. Steam bekas ini akan memanaskan air kondensat dari pompa kondensat yang dialirkan melintasi kondensor Gland Steam. Karena panas diserap oleh air kondensat, maka steam bekas dari seal poros akan mengembun kemudian dialirkan ke hotwell hingga bercampur dengan air hotwell. Dari hasil penelitian koefisien perpindahan kalor tertinggi pada tabung adalah 80.491,93 btu/hr ft2 pada hari Rabu jam 14.00. Diketahui bahwa koefisien perpindahan panas pada tabung terendah adalah 79.011,94 btu/hr ft2 pada hari Senin jam 16.00. Koefisien perpindahan panas tertinggi pada cangkang adalah 5.294.695 btu/jam ft2 pada hari Jumat pukul 14.00, koefisien perpindahan panas cangkang terendah adalah 2.762.553 btu/jam ft2 pada hari Selasa pukul 11.00. Perpindahan panas aktual tertinggi adalah 1.528.694.1 btu/jam hari Jumat jam 14.00, perpindahan panas aktual terendah adalah 713.159.522 btu/jam pada hari Kamis jam...
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A power generating system in a steam power plant is a complex one. This system involves a large number of variables containing information concerning the operation conditions. It can also be seen as an important asset in both power... more
A power generating system in a steam power plant is a complex one. This system involves a large number of variables containing information concerning the operation conditions. It can also be seen as an important asset in both power generation and energy portfolios. At the Asam-asam power plant of South Kalimantan, the complexity of the system has led to difficulties in explaining the apparently steady decrease in the output power. The amount of data collected is simply too big and the dimension too high for analysis purposes based on conventional thermodynamics. This study was performed to tackle the problem using statistical modelling. This approach can accommodate empirical behaviors of the variables and the probabilistic nature of the system. Information obtained from this modelling can be valuable for various purposes. The method consists of literature review, model development, data collection and analysis, and model fitting. Generalized additive models were chosen. Data were a...
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This research aims to establish the effects of the length of the activated carbon-based medium on exhaust gas emission and evaluate the engine's corresponding performance. The method utilizes peat soil as the source of activated... more
This research aims to establish the effects of the length of the activated carbon-based medium on exhaust gas emission and evaluate the engine's corresponding performance. The method utilizes peat soil as the source of activated carbon. The soil is dried and then passed through a 30-mesh sieve. It is further heated to 400°C for an hour, soaked in a 25-percent H2SO4 solution, and then maintained at 120°C in an oven. The resulting activated carbon is then packed into an absorbent tube with a diameter of 30 mm and a varying length of 60 mm, 70 mm, and 80 mm. The tube is appended to the leaving end of a Honda Supra 125 X's muffler. The result suggests that the lowest emission is achieved when the tube length is 80 mm and at 2000 rpm of engine speed, i.e., with CO level of 2.57 percent and HC of 228 ppm. On the other hand, the highest emission is given by the tube length of 60 mm, i.e., with an HC level of 1437 ppm. In conclusion, it shows that the tube length affects the absorbe...
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Research Interests:
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Mentaos area of Banjarbaru City South Kalimantan is one of the priorities for planning and slum settlement arrangement conducted by government of Banjarbaru City. The activities of slum setup in Banjarbaru City are one of priority... more
Mentaos area of Banjarbaru City South Kalimantan is one of the priorities for planning and slum settlement arrangement conducted by government of Banjarbaru City. The activities of slum setup in Banjarbaru City are one of priority programs conducted by government of Banjarbaru City that not only aiming to repair slum settlement infrastructure but also striving in realization of the area design so that can change the mindset or behaviour of society in slum settlement and also increasing the society’s economy. The aims, which are intended to be achieved in this research, are to examine the effectiveness of the implementation in handling slum settlement in Mentaos Urban Village, Banjarbaru City and to determine the approach that can ensure the effectiveness of the handling implementation of the slum settlement in Mentaos Urban Village, Banjarbaru City. The method used in this research is descriptive with a quantitive approach, the research result of The Effectiveness of Slum Settlemen...
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PT Adaro Indonesia is trying to adjust a vertical clearance under Tabalong Bridge 1 (unloaded) and Tabalong Bridge 2 (loaded) because the existing conditions still apply a minimum vertical clearance of 4 m. I t should be in accordance... more
PT Adaro Indonesia is trying to adjust a vertical clearance under Tabalong Bridge 1 (unloaded) and Tabalong Bridge 2 (loaded) because the existing conditions still apply a minimum vertical clearance of 4 m. I t should be in accordance with latest Regulation of the Minister of Public Works No. 19/PRT/M/2011 that for vertical clearance above national road at least 5.1 m. This specification has not been met by the national road under the Tabalong 1 & 2 Bridges bec ause both bridges were built in the 90s. Therefore we need an engineering technique to overcome this. There are 2 alternative designs, namely lowering the elevation of the national road and increasing the elevation of the bridge's upper structure to mitiga te oversized vehicles so as not to hit the lower structure of the Tabalong bridge. In determining the selection of the best alternative designs in this research is based on two (2) things, non financial criteria with Analytical Hierarchy Process (AHP) and financial crit...
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Supply of compressed air has an important role in continuity of operation power plant, failures that occur in operation of engine in this unit can affect all plant operations that can result in decreased production levels. To determine... more
Supply of compressed air has an important role in continuity of operation power plant, failures that occur in operation of engine in this unit can affect all plant operations that can result in decreased production levels. To determine the magnitude of loss of pressure or energy loss lost in pressurized air piping system at plant located in PT. Indocement Tunggal Prakarsa, Tbk. Tarjun Plant-12. Evaluation of pressure reduction losses in the air system is focused on losses caused by system leakage and pressure drops in the distribution lines caused by several factors including friction in straight pipes, bends, fittings, reducers and existing components, and knowing the loss of costs due to compressor pressure drop. The pressure drop in the pipe is very dependent on pipe diameter, besides distance and supporting components on piping system also affect the pressure drop. Based on calculation, there was a decrease in pressure of 1603660,895 Pa, from pressure drop caused by friction of ...
Research Interests: Piping and Pressure Drop
Theecondenser is a type of heat exchanger that functions to condense fluid. On steam powermsystems. Thevmain function ofmthe condenser is to convert steam into liquid. The purpose of this study is to determine the value and influence of... more
Theecondenser is a type of heat exchanger that functions to condense fluid. On steam powermsystems. Thevmain function ofmthe condenser is to convert steam into liquid. The purpose of this study is to determine the value and influence of heat balance, heat transfer coefficient, pressure drop and condenser efficiency.Thewresults offthissstudy indicate that in 2018 thee average heat balance (Q) was obtained at 356,017,533.46 Kj / hour while in 2019 the results of the average heat balance (Q) were 640,293,647,066 Kj / hour, fouling factor was not affect the balance sheet. The average gross heat transfer coefficient (UD) in 2018 amounted to 204,274.25 Kj / hour.m2. C and the average net heat transfer coefficient (UC) was 206,378 Kj / hr.m2. ° C whereas in 2019 the average heat transfer coefficient is obtained by the average gross heat transfer coefficient (UD) of 366,544.07 Kj / jam.m2. ° C and the Clean heat transfer coefficient (UC) is 448,554 Kj / h.m2. ° C.Fouling factor is very infl...
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Sebuah metode praktis diusulkan untuk keperluan estimasi model-model probabilistik pada analisis frekuensi banjir. Ini merupakan sebuah implementasi tepat guna dari metode estimasi berbasis L- moments. Model-model yang... more
Sebuah metode praktis diusulkan untuk keperluan estimasi model-model probabilistik pada analisis frekuensi banjir. Ini merupakan sebuah implementasi tepat guna dari metode estimasi berbasis L- moments. Model-model yang dimaksud meliputi sejumlah distribusi nilai ektrem, yaitu Gumbel, generalized extreme value, lognormal tiga parameter, Pearson tipe III, log-Pearson tipe III, generalized logistic, dan generalized Pareto. Data untuk keperluan pengujian diambil dari aliran maksimum di dunia nyata. Metode yang diusulkan berupa sebuah prosedur sederhana empat tahap pada aplikasi pengolah spreadsheet. Tidak ada pengodean yang diperlukan. Validasi dilakukan dalam bentuk perbandingan terhadap hasil-hasil menggunakan perangkat lunak komputasi statistik R. Kesederhanaan metode ini bersama dengan kinerja estimasinya yang relatif tinggi berpotensi untuk memungkinkannya diadopsi oleh kalangan praktisi penyelenggara konstruksi, khususnya di Kalimantan Selatan. Rekomendasi untuk penge...
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diolah untuk meminimalisasi pencemaran lingkungan dan meningkatkan nilai ekonomisnya. Salah satu penanganan limbah sisa makanan adalah dengan mengkonversinya menjadi energi alternatif seperti briket biomassa. Penelitian ini bertujuan... more
diolah untuk meminimalisasi pencemaran lingkungan dan meningkatkan nilai ekonomisnya. Salah satu penanganan limbah sisa makanan adalah dengan mengkonversinya menjadi energi alternatif seperti briket biomassa. Penelitian ini bertujuan untuk mempelajari pengaruh suhu pirolisis dan jenis perekat (perekat kanji dan campuran perekat kanji dengan residu plastik hasil pirolisis) terhadap karakteristik bio oil dan karakteristik briket biomassa. Penelitian ini dilakukan dalam sebuah reaktor pirolisis pada suhu 300, 400, 500 dan 6000C selama 3 jam. Briket biomassa hasil pirolisis kemudian dihaluskan dengan ukuran 40 mesh dan dicampur dengan perekat sebelum dicetak. Karakteristik bio oil yang dihasilkan dari masing-masing sampel adalah dari temperratur 300oC persentase bio oil sebesar 27,52% dan terus meningkat menjadi 76,44% pada teperatue pirolisis 600oC, sedangkan untuk briket biomassa yang diperoleh mempunyai nilai kalor berkisar antara 4685,8857-6818,6112 kalori/gram, kadar air antara 5,0...
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MFC is a system of generating electricity by utilizing bacterial interactions found in nature. The bacteria found in organics convert organic matter into electrical energy. The nature of bacteria that can degrade organisms in MFC produces... more
MFC is a system of generating electricity by utilizing bacterial interactions found in nature. The bacteria found in organics convert organic matter into electrical energy. The nature of bacteria that can degrade organisms in MFC produces electron and proton ions. These ions produce differences in electrical potential so that energy can be produced. The purpose of this study was to determine the electrical potential of instant noodle stew wastewater and the effect of electrodes on the acquisition of electricity using copper and zinc electrodes and a combination of copper and zinc, and to know the effect of aerators on MFC. This research was conducted for 12 hours and data collection was done once every hour for 12 hours. The instant noodle boiled water with a combination of zinc and copper (Zn-Cu) electrodes produces more electricity than other electrode combinations. The combination of copper and zinc electrodes (Cu-Zn) produces the lowest electricity gain and cannot be used as a c...
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Construction images are potentially valuable sources of information. However, there are several problemsrelated to its retrieval mainly relating to understanding of the semantics of the corresponding content. Additionally, theinformation... more
Construction images are potentially valuable sources of information. However, there are several problemsrelated to its retrieval mainly relating to understanding of the semantics of the corresponding content. Additionally, theinformation is. very much unstructured in nature. These problems have been solved by the development of conceptsenabling the content to be represented in structured form. The framework proposed for this is described. It is based onthe use of domain-specific concepts to retrieve image content and contextual information to improve contentunderstanding. A mathematical framework is also developed based on a Bayesian approach to make the implementationpossible for construction image classification. This robust framework enables fusion of related domain knowledge withnew information in a versatile manner. An example demonstrates how it is possible to combine information from bothavailable image data and domain knowledge to understand construction image content.
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Pengembangan produk menjadi hal yang penting untuk dikaryakan, dengan melakukan pengembangan produk akan selalu memiliki kemampuan bersaing dan mampu mengantisipasi perkembangan kebutuhan konsumen, dalam arti kata produk tersebut memiliki... more
Pengembangan produk menjadi hal yang penting untuk dikaryakan, dengan melakukan pengembangan produk akan selalu memiliki kemampuan bersaing dan mampu mengantisipasi perkembangan kebutuhan konsumen, dalam arti kata produk tersebut memiliki fungsi-fungsi yang berkembang pada konsumen. Produk baling-baling pada mulanya hanya dilihat sebagai fungsi penggerak saja, tetapi perkembangan konsumen menimbulkan kebutuhan lain, sehingga dikembangkan fungsi-fungsi lainnya. Pengembangan fungsi tersebut akan menimbulkan alternatif-alternatif produk, selanjutnya dengan penerapan Rekayasa Nilai ( Value engineering ) akan didapat alternatif yang mampu memenuhi fungsi-fungsi tersebut dan menghasilkan suatu nilai ( score ) yang dapat digunakan sebagai patokan untuk menenntukan alternatif. Rekayasa Nilai merupakan pendekatakan yang sistematis dan terorganisir. Studi ini dapat mengidentifikasikan biaya-biaya yang tidak diperlukan dalam suatu desain, mencoba menampilkan ide-ide baru yang berkaitan dengan ...
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Infrastructure in the form of bridges is very important for Buntok Regency in Central Kalimantan where the area is swampy or lowland area. Total wood bridge construction is 45% from total 163 bridge in this area that most of them are not... more
Infrastructure in the form of bridges is very important for Buntok Regency in Central Kalimantan where the area is swampy or lowland area. Total wood bridge construction is 45% from total 163 bridge in this area that most of them are not proper condition considering some wood materials need to be replaced. The innovation has been created to find the effective way how to maintenance the wooden bridge that has been idle for long time due to broken material on superstructure of the bridge. The floor of bridge that constructed with previous materials of ulin wooden bridge replaced by composite materials with floordeck concrete combination. The implementation of Tampa Bridge maintenance innovation showed better performance in terms of safety, comfortable and smoothness of bridge users from community around. In terms of budget aspect, the maintenance is cumulatively more efficient than if carrying out floor changes every year considering no longer possible to find ulin wood anymore. On te...
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One of the residential areas that have a densely populated settlement is Pelambuan Village, West Banjarmasin. Pelambuan Village is a slum area with medium and low categories. Rapid population growth also affects the growth of illegal... more
One of the residential areas that have a densely populated settlement is Pelambuan Village, West Banjarmasin. Pelambuan Village is a slum area with medium and low categories. Rapid population growth also affects the growth of illegal residential buildings on land that is not privately owned. From several settlement conditions formed in Pelambuan Village, it is necessary to analyze residential buildings and settlement areas formed based on three physical aspects: building, environmental, and legal aspects. This study aimed to determine the factors that affect habitability and degradation of environmental quality and perform analysis to determine a treatment plan that needs to be taken for occupancy and problematic areas occupancy can meet the requirements habitability. Analysis and distribution of questionnaires provided several factors that affect the decline in the quality of habitability of buildings and residential areas. From the building aspect, it was found that what caused th...
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Controlling is a crucial stage in achieving a project target, covering aspects of cost, quality, and time. In the construction industry, the cost aspect is often the main focus. The project of Duta Mall 2 (DM 2) is the development of an... more
Controlling is a crucial stage in achieving a project target, covering aspects of cost, quality, and time. In the construction industry, the cost aspect is often the main focus. The project of Duta Mall 2 (DM 2) is the development of an existing building and the cost aspect is a major concern to the owner. Dynamic internal and external factors of the DM 2 project cause the project control to be quite difficult, with the materials becoming the most dominant factor in construction cost. Cost control starts from reinforced concrete work materials, consisting of ready mixed concrete, concrete steel, wire, plywood, timber, and nails. Bad control of material purchasing can lead to cost escalation, degradation of material quality, and impact on the execution schedule of works. This research was conducted to obtain quantitative correlations between material components based on reinforced concrete works material supply data. From these data, some linear regression models can be designed to o...
Research Interests: Civil Engineering, Computer Science, Structural Engineering, Project Management, Construction Management, and 9 moreGeotechnical Engineering, Environmental Health and Safety, Project Cost Control, Research and Development, Quality Management System, Purchasing, Schedule, Control Management, and Vendor Management and its role in Procurement
This study aims to look at the combustion characteristics of destillates of used rubber and diesel oil using droplet, the characteristics observed were flash point, ignition delay time, burning rate, and visualization (hight) of fire.... more
This study aims to look at the combustion characteristics of destillates of used rubber and diesel oil using droplet, the characteristics observed were flash point, ignition delay time, burning rate, and visualization (hight) of fire. Variation in mix RCO 10%, 20%, 30%, 40%, 50%. The tool used is a tool designed by researchers. The result of the flash point study found that the highest velue was found in the mixture of RCO 10% which was 105,7oC and the lowest value was found in mixture of 50% which was 56,6oC. then the highest value of the ignition delay time is in the mixture of 10% which is 1,64 seconds and the lowest value in the mixture is 30% which is 0,98 seconds, then are result of the highest burning rate are found in the mixture 0f 40% which is 3,83 seconds and lowest value is mixed with 20% which is 3,1 second. Then the highest level of fire in the mixture of 10% is 82,3 mm and the lowest is in the mixture of 50% which is 73,2 mm. Keywords: Rubber Compound Oil, Droplet, Fl...
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Boiler is a tool that serves to convert water into pressurized steam. In the heat causes heat boiler heat transfer through the water into pressurized steam that is heated from the fuel in the furnace.And often a problem of burning in the... more
Boiler is a tool that serves to convert water into pressurized steam. In the heat causes heat boiler heat transfer through the water into pressurized steam that is heated from the fuel in the furnace.And often a problem of burning in the boiler is less than the maximum. Because the incoming energy is energy derived from the fuel, there is some energy lost during the combustion process it happens because the fuel has a low heat so that the combustion is not maximal cause the boiler performance is reduced. To avoid this, it is necessary to maintenance for the boiler component in order to improve performance. Direct method is "input - output method" because this method uses only the heat in the fuel and steam coming from the boiler output. Boiler efficiency of research results from the date of March 27, 2017 until the date of 10 April 2017 with a total average - average efficiency were analyzed, namely 74.4%. On April 3, 2017 the calculated efficiency of 76.57% indicates tha...
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Indonesia as one of the largest coal producers utilizes this advantage by establishing a steam power plant, one of which is Borneo south PLTU power plant PT.PLN (persero) south of Borneo and Central Borneo Asam-Asam generation sector. One... more
Indonesia as one of the largest coal producers utilizes this advantage by establishing a steam power plant, one of which is Borneo south PLTU power plant PT.PLN (persero) south of Borneo and Central Borneo Asam-Asam generation sector. One important component of PLTU is air heater to raise the combustion air temperature. Initial heating of ljungstrom type lattest regenerative air heater in PLTU Asam-Asam unit 2 is carried out cleaning and maintenance on seal and gas side surfaces to optimize heat transfer coefficient and ratio of air intake ratio exposed by forced draft fan and air heated by flue gas in heater air heater elements and transferred to the combustion chamber to make efficient use of new fuel. Measurements were carried out on August 9, 2017 for 2 hours to find out the average value of heat transfer coefficient and temperature comparison of entry and exit from air heater of Asam-Asam unit 2 steam power plant. This research was conducted to find out the value of heat trans...
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In some heat exchanger tools are widely used in industries such as power plants, oil refineries, chemical plants and petrochemicals, natural gas industry, refrigeration, and so forth. One example of a heat exchanger found in the poultry... more
In some heat exchanger tools are widely used in industries such as power plants, oil refineries, chemical plants and petrochemicals, natural gas industry, refrigeration, and so forth. One example of a heat exchanger found in the poultry feed industry in PT.Japfa Comfeed Branch of Banjarmasin is the economizer, where the hot vapor of combustion in the furnace is used as a feed water heater before entering the boiler. From the results of the study known in the economize coefficient of the highest heat transfer before the overhaul of 1.393.1 Btu / jam.ft2.oF at 92.5 oC, and the lowest heat transfer coefficient before the overhaul of 1,334.8 Btu / jam.ft2. oF at 101 ° C. after the overhaul, it is known that the highest economizer heat transfer coefficient is 1,419.7 Btu / hour.ft2.oF at 99oC, and the lowest heat transfer coefficient after the overhaul is 1,378.6 Btu / hr.ft2.oF at 104.5 oC. The increase in heat transfer coefficient value after overhaul is 6.4% of the heat transfer coeff...
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Ekonomiser adalah alat yang digunakan untuk memanaskan air umpan sebelum memasuki boiler dengan memanfaatkan panas dari gas pembakaran di boiler. Dengan meningkatnya suhu air pengisi boiler, juga diharapkan meningkatkan efisiensi boiler.... more
Ekonomiser adalah alat yang digunakan untuk memanaskan air umpan sebelum memasuki boiler dengan memanfaatkan panas dari gas pembakaran di boiler. Dengan meningkatnya suhu air pengisi boiler, juga diharapkan meningkatkan efisiensi boiler. Dalam penelitian ini, pengumpulan data dilakukan di ruang kontrol dan data yang diambil, yaitu Tc.i (suhu economizer air yang masuk), Tc.o (suhu air keluar dari economizer), Th.i (suhu gas buang sebelum memasuki economizer) dan Th.o (suhu gas asap keluar dari economizer). Koefisien perpindahan panas tertinggi 4260.492 Btu / h.ft2. ° F dan koefisien perpindahan panas terendah 4251.243 Btu / h.ft2. ° F. Efisiensi tertinggi 87,43% dan terendah 80,76%. Economizer is a tool used to heat feed water before entering boiler by utilizing heat from the combustion gas in the boiler. With the increasing temperature of boiler filler water, it is also expected to increase boiler efficiency. In this study, data collection was carried out in the control room and the...
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Boiler is a tool used to produce steam / steam for various purposes. The water in the boiler is heated by heat from the fuel combustion (other heat source) resulting in heat transfer from the heat source to the water causing the water to... more
Boiler is a tool used to produce steam / steam for various purposes. The water in the boiler is heated by heat from the fuel combustion (other heat source) resulting in heat transfer from the heat source to the water causing the water to become hot or transformed into steam. Direct Methods Also known as "input-output method" because this method requires only output / output (steam) and heat input / fuel (fuel) for efficiency evaluation. From the results of boiler efficiency study from August 8, 2017 to August 17, 2017 with a total average - unit 4 has a boiler efficiency 75.5012% higher than unit 2 which only amounted to 65.24% 84%. The high efficiency of boiler unit 2 is due to the average pressure on unit 4 of 86.9229 bar is greater than the pressure of unit 2 which is only about 82.9155 bar. Then Main steam flow on unit 4 is 66,6605 kg / s while unit 2 is only 63,61111 kg/s. For feed water flow unit 4 only able to flow 65,9 kg / s and unit 2 equal to 66,675 kg/s.
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The purpose of this research is to know the heat distribution system in three types of fish dryers. The variations of the dryer room were fire-tube type, fire-tube type with bevel, and air-tube type. This study was conducted by simulating... more
The purpose of this research is to know the heat distribution system in three types of fish dryers. The variations of the dryer room were fire-tube type, fire-tube type with bevel, and air-tube type. This study was conducted by simulating airflow and heat transfer that occurred in each dryer room variation by using CFD software. In the simulation, the dryer was heated using an electric heating element with a temperature of 80 °C and the results display hot air flow moving in the drying chamber. In the fire-tube type dryer room obtained average temperature of 46.74OC. In the fire-tube type dryer room with the bevel obtained an average temperature of 44.40OC. While the type of air-tube shows average temperature results of 34.31OC. From the simulation, we known that the fire-tube type has the best heat distribution system.
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This paper shows some of the research results. The result of this research shows that the boiler efficiency at operational condition (present) is 79,32% decreased efficiency equal to 9,19% compared with operational condition with... more
This paper shows some of the research results. The result of this research shows that the boiler efficiency at operational condition (present) is 79,32% decreased efficiency equal to 9,19% compared with operational condition with efficiency as big as 88,51%. One of the factors analyzing the declining efficiency of the boiler is greatly influencing the heat transfer process, because if there is dirt or crust on the boiler pipe and the fouling, it will result in the process of heat transfer will decrease so that the heat transfer rate will decrease, and will also affect the amount of heat losses in the boiler.
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This study aims to determine the performance of steam turbine PT. Indocement Tarjun Plant 12 by comparing the results of data obtained during each performance test in 1999, 2016, 2017, and 2018. This research data is taken from the... more
This study aims to determine the performance of steam turbine PT. Indocement Tarjun Plant 12 by comparing the results of data obtained during each performance test in 1999, 2016, 2017, and 2018. This research data is taken from the control room of PT. Indocement Tarjun, variable data obtained in the form of load, main inlet steam temperature, main inlet steam pressure, HP heater feed outlet temperature, HP heater feed outlet pressure, main steam flow, and turbine by pass flow. The data is processed to get the turbine heat rate and the efficiency per time of each performance test and then averaging the data results over time, then comparing the turbine heat rate and the average efficiency of each performance test. The calculation of turbine heat rate using heat & mass balance method, turbine efficiency is obtained by comparing the energy of 1 kW with turbine heat rate and multiplying 100%. The result of the average heat turbine calculation per performance test ie August 1999 is 2.546...
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This study aims to determine the effect of various brands of oil against temperature, exhaust emissions, and performance on the engine yamaha vixion 150cc. This study was conducted by taking temperature data, exhaust emissions, and engine... more
This study aims to determine the effect of various brands of oil against temperature, exhaust emissions, and performance on the engine yamaha vixion 150cc. This study was conducted by taking temperature data, exhaust emissions, and engine performance yamaha vixion 150cc. This research uses three different types of oil, namely super yamalube sport oil, ax7 advanced shell, and pertamina enduro. Temperature testing is performed at engine speed of 1,500 rpm, 4000 rpm and 10,500 rpm using neutral gear, 1, 2, 3, 4, and 5. Performance tests are performed using a dyno test for one test of each type of oil. Once the data in can and in the past compared the results of temperature data, exhaust emissions, and the performance of each type of oil. The best oil temperature test result is using yamalube oil. Testing the lowest exhaust gas emission gas emissions are advanced Ax7 shell oil. Ax7 shell oil produces the lowest exhaust emissions among other oils while enduro oil exceeds the standard exh...
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Tire is important component of a Dump Truck. For transporting material from the loading point and fleet to disposal Dump Truck performance is required. Trouble On the tire will interfere the unit performance. Month period data from... more
Tire is important component of a Dump Truck. For transporting material from the loading point and fleet to disposal Dump Truck performance is required. Trouble On the tire will interfere the unit performance. Month period data from January to March show the amount of failure to the unit HD785-7 dump truck tire which can indirectly interfere the performance of the unit. Therefore, analysis of two key performance indicator (KPI) that tread utility ratio (TUR) and lifetime must be done to find the factors that cause failure, as well as find out whether there is a relationship between lifetime and TUR against different types of failure that occurred by using logistic regression. From the analysis, it is known that the tire KPI has yet to reach a given target, the main factor of tire performance has yet to reach the target is human error, operator Dump Truck and Excavator by 44%, from the results of logistic regression analysis of the data for 3 months it is known that the relationshi...
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This study aims to determine and compare the results of the syngas volume generated from variations in mixing of galam wood powder and bentonite catalyst coal. This research was carried out by mixing galam wood powder and coal with a mass... more
This study aims to determine and compare the results of the syngas volume generated from variations in mixing of galam wood powder and bentonite catalyst coal. This research was carried out by mixing galam wood powder and coal with a mass of 200g which was given a bentonite catalyst. There were 4 variations of mixing ingredients namely 200g galam wood powder and 0g coal, 180g galam wood powder and 20g coal, 140g galam wood powder and 60g coal, 100g galam wood powder and 100g coal which added 50%, 30% and 10% bentonite catalysts from the mass of material in each variation of the temperature. Material in updraft gasification with a temperature of 500oC for 120 minutes or 2 hours. The results showed that variations with a mixture of 200g of galam wood powder and 0g coal were the ones that produced the most syngas. This was due to the density of galam wood powder which was more tenuous so it was more flammable at temperatures up to 500oC. The amount of bentonite catalyst addition also a...
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As an important indicator of poor project performance, late project completion is a result of delay. While delay itself is caused by numerous factors, their effects that eventually lead to late project completion are realized as waste in... more
As an important indicator of poor project performance, late project completion is a result of delay. While delay itself is caused by numerous factors, their effects that eventually lead to late project completion are realized as waste in term of time. This research investigates how construction professionals agree on what contribute to late project completion based on construction waste. The result should help provide insight into how different types of construction waste affect project performance. For this purpose, respondents consisting of construction professionals in South Kalimantan and Central Kalimantan Provinces were invited to a questionnaire-based survey. They were asked seven questions, each regarding whether a particular type of waste contributes to late project completion. Gwet’s gamma coefficient was used to perform a consensus analysis of the answers. A consensus was reached that five out of seven types of waste contribute to late project completion. They include wai...