Sürdürülebilir mühendislik uygulamaları ve teknolojik gelişmeler dergisi, Dec 28, 2019
Dorduncu Sanayi Devrimi, dijital devrime dayanmanin yaninda bircok farkli teknolojiyi bir araya g... more Dorduncu Sanayi Devrimi, dijital devrime dayanmanin yaninda bircok farkli teknolojiyi bir araya getirmekte ve ekonomi, is, toplum ve bireyler icin benzeri gorulmemis paradigma kaymalarina yol acmaktadir. Yenilenebilir teknolojilere dayali fotovoltaik santraller gelecegin sekillenmesi ve enerji teknolojilerinde dijital donusumun gerceklesmesinde onemli oynayacaktir. Fotovoltaik enerjiye dayali yatirimlarin devamliligi icin tum aktorlerin bir fotovoltaik guc uretim tesisi yasam dongusune yonelik bilgilerinin olmasi ve indirgenmis elektrik maliyeti degerlerine ulasabilmeleri gerekmektedir. Bu calismada Turkiye’de alti bolge icin System Advisor Model (SAM) yazilimi kullanilarak kurgulanan santrallerin teknik ve ekonomik analizi yapilarak birbirleri ile karsilastirilmistir.
Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi
Bu çalışmada yağmur suyu hasadı hakkında bilgi verilerek, güneş enerjisi santrallerinde uygulanab... more Bu çalışmada yağmur suyu hasadı hakkında bilgi verilerek, güneş enerjisi santrallerinde uygulanabilirliği senaryolar eşliğinde değerlendirilmiştir. Yağmur suyu hasadının güneş panelleri üzerinde yapılarak, toplanan suyun panel temizliğinde kullanılması hedeflenmektedir. Bu amaçla Türkiye’deki en büyük alana sahip güneş enerjisi santrali seçilerek panel alanlarına düşen yıllık yağış miktarı hesaplanmıştır. Çalışma sonucunda güneş enerjisi santrallerinin su tüketiminin ne kadarının yağmur suyundan karşılanabileceği 3 farklı senaryo eşliğinde değerlendirilmiştir.
Bu çalışmada, fosile dayalı enerji kaynaklarının tüketiminin azaltılmasında önemli bir role sahip... more Bu çalışmada, fosile dayalı enerji kaynaklarının tüketiminin azaltılmasında önemli bir role sahip olan fotovoltaik (FV) sistemler, sürdürülebilirlik kapsamında incelenmiştir. Yenilenebilir enerji kaynakları arasında önemli bir paya sahip olan FV sistemler görünür gelecekte ekonomik ömürlerini tamamladıklarında çevresel ve ekonomik sonuçlara sebep olacaktır. FV modüller ortalama 25-30 senelik ömür süresi boyunca temiz enerji üretimine katkı sağlarken dünyamız için oluşturacağı potansiyel tehlikeleri de bünyesinde barındırmaktadır. Yakın gelecekte daha yoğun bir şekilde karşımıza çıkacak olan FV modül atıklarla ilgili üreticilerin, kullanıcıların, devletlerin ve araştırmacıların daha hızlı bir şekilde sorumluluk alması ve eylem planlarının hayata geçirilebilmesi için bu konudaki her türlü girişimin politikalarla desteklenmesi gerekmektedir. Gerçekleştirilen çalışmada, Türkiye’nin 2050 yılına kadar sahip olacağı FV sistem kurulu güçleri ve oluşacak FV modül atık miktarları on yıllık pe...
Beykent Üniversitesi Fen ve Mühendislik Bilimleri Dergisi
Solar energy has advantages such as accessibility, applicability and predictability compared to o... more Solar energy has advantages such as accessibility, applicability and predictability compared to other renewable energy sources. This energy source is used for many purposes in the world. Photovoltaic panels provide applications such as generating electricity from solar energy or heating and cooling. Their performance changes depending on the PV panel material, the amount of solar radiation and the operating temperature factors. In the electrical energy conversion of PV systems, overheating of the PV module leads to a decrease in power generation and causes a decrease in efficiency. Therefore, there are cooling methods for cooling PV panels, and they are divided into passive and active. In this study, the properties of the phase change material (PCM) used in the cooling of PV panels are given. In addition, studies using PCM to reduce the temperature of PV panels and experimental and numerical studies that increase efficiency by using PCM for using thermal energy are discussed. In the...
Sustainable Recovery and Reutilization of Cereal Processing By-Products, 2018
Abstract Biobased products can be manufactured from various feedstocks. The increasing need for t... more Abstract Biobased products can be manufactured from various feedstocks. The increasing need for these products is the driving force for the growth of the biorefinery market. There is an ongoing debate whether bioproducts will replace fossil-based products. This chapter provides an overview of recent studies on the biorefinery concept and investigates its possible use for conversion of wheat bran into value-added biobased products. A large number of methods and technologies have been researched and developed, resulting in high recovery of sugars and value-added products. An overview of end products and by-products of wheat bran using diverse biorefinery concepts and their applications in the main sectors is demonstrated. In addition, market potential provides economic and scientific insights, and novel biorefinery concepts are identified and discussed in spite of comparing various biomass conversion technologies. This chapter also provides an outline of various steps involved in biochemical conversion of carbohydrates to biofuels, bioethanol, and biobutanols, and conversion of nature's most abundant aromatic polymer, lignin, to value-added products. The limitations of biomass development, lignocellulose deconstruction, specialty fuels, and bioproduct development from biomass are discussed by considering most of the workshop results together with future opportunities for basic research in support of a sustainable and commercially viable advanced biofuels and bioproducts industry. Bioeconomy is the sustainable production and conversion of biomass for a range of food, health, fiber, industrial, and energy products through the application of biotechnologies in biorefineries using nonfood plants and trees for industrial purposes. This chapter researches recent global trends and developments of scientific studies in the field of biorefinery concepts. The products of knowledge-based biorefinery are expected to have a one-third share of industrial production.
Preparative Biochemistry & Biotechnology, 2022
The production of lactic acid, a polylactic acid monomer from energy crop Miscanthus × giganteus ... more The production of lactic acid, a polylactic acid monomer from energy crop Miscanthus × giganteus lignocellulosic biomass cultivated in Izmir was investigated. Liquid hot water (LHW) pretreatment was carried out at a temperature range of 140-200 °C, pressure 100 to 200 bar and reaction time of 15-45 min at a fixed flow rate of 2 mL/min using D-optimal experimental plan. The optimum conditions were elicited as 140 °C, 100 bar and 45 minutes, yielding the highest reducing sugar content of 77.32 mg/g, whereas 1.25 mg/mL arabinose and 1.35 mg/mL xylose as monomeric sugars. Subsequently, the enzymatic hydrolysis was applied to the solid fraction. The optimum conditions for enzymatic hydrolysis were determined as 5% (w/v) solid/liquid ratio, 20 FPU/mL enzyme loading and 72 hours, revealing the highest amount of reducing sugar as 200 mg/mL. LHW hydrolysate was used as a production medium for lactic acid manufacturing in submerged fermentation by Rhizopus oryzae. The maximum lactic acid content was found to be 6.8 g/L at 24 hours, whereas the lactic acid yield was 0.28 g/L.h. The sequential design of LHW, followed by enzymatic hydrolysis and submerged lactic acid fermentation can be utilized in industry, contributing to the bioeconomy.
MISC-02 This study aims to compare cotton stalk based biochar obtained using hydrothermal carboni... more MISC-02 This study aims to compare cotton stalk based biochar obtained using hydrothermal carbonization and torrefaction. Experiments of hydrothermal carbonization (HTC) were carried out by varying temperature (170, 210 and 250 °C), reaction time (30, 45 and 60 min) and particle size (1, 2 and 3 mm). In the experiments of HTC of cotton stalk; temperature, reaction time and particle size effects were optimized via response surface estimation (RSM) with Box-Benhken. Optimum condition was determined 210 ̊C, 60 min and 2mm. Then torrefaction was conducted at the optimum condition. The results of hydrothermal carbonization and torrefaction were compared with considering high calorific value, energy yield, high mass yield, ash yield, carbon yield and energy consumption at the optimum condition.
Sürdürülebilir mühendislik uygulamaları ve teknolojik gelişmeler dergisi, Dec 28, 2019
Dorduncu Sanayi Devrimi, dijital devrime dayanmanin yaninda bircok farkli teknolojiyi bir araya g... more Dorduncu Sanayi Devrimi, dijital devrime dayanmanin yaninda bircok farkli teknolojiyi bir araya getirmekte ve ekonomi, is, toplum ve bireyler icin benzeri gorulmemis paradigma kaymalarina yol acmaktadir. Yenilenebilir teknolojilere dayali fotovoltaik santraller gelecegin sekillenmesi ve enerji teknolojilerinde dijital donusumun gerceklesmesinde onemli oynayacaktir. Fotovoltaik enerjiye dayali yatirimlarin devamliligi icin tum aktorlerin bir fotovoltaik guc uretim tesisi yasam dongusune yonelik bilgilerinin olmasi ve indirgenmis elektrik maliyeti degerlerine ulasabilmeleri gerekmektedir. Bu calismada Turkiye’de alti bolge icin System Advisor Model (SAM) yazilimi kullanilarak kurgulanan santrallerin teknik ve ekonomik analizi yapilarak birbirleri ile karsilastirilmistir.
Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi
Bu çalışmada yağmur suyu hasadı hakkında bilgi verilerek, güneş enerjisi santrallerinde uygulanab... more Bu çalışmada yağmur suyu hasadı hakkında bilgi verilerek, güneş enerjisi santrallerinde uygulanabilirliği senaryolar eşliğinde değerlendirilmiştir. Yağmur suyu hasadının güneş panelleri üzerinde yapılarak, toplanan suyun panel temizliğinde kullanılması hedeflenmektedir. Bu amaçla Türkiye’deki en büyük alana sahip güneş enerjisi santrali seçilerek panel alanlarına düşen yıllık yağış miktarı hesaplanmıştır. Çalışma sonucunda güneş enerjisi santrallerinin su tüketiminin ne kadarının yağmur suyundan karşılanabileceği 3 farklı senaryo eşliğinde değerlendirilmiştir.
Bu çalışmada, fosile dayalı enerji kaynaklarının tüketiminin azaltılmasında önemli bir role sahip... more Bu çalışmada, fosile dayalı enerji kaynaklarının tüketiminin azaltılmasında önemli bir role sahip olan fotovoltaik (FV) sistemler, sürdürülebilirlik kapsamında incelenmiştir. Yenilenebilir enerji kaynakları arasında önemli bir paya sahip olan FV sistemler görünür gelecekte ekonomik ömürlerini tamamladıklarında çevresel ve ekonomik sonuçlara sebep olacaktır. FV modüller ortalama 25-30 senelik ömür süresi boyunca temiz enerji üretimine katkı sağlarken dünyamız için oluşturacağı potansiyel tehlikeleri de bünyesinde barındırmaktadır. Yakın gelecekte daha yoğun bir şekilde karşımıza çıkacak olan FV modül atıklarla ilgili üreticilerin, kullanıcıların, devletlerin ve araştırmacıların daha hızlı bir şekilde sorumluluk alması ve eylem planlarının hayata geçirilebilmesi için bu konudaki her türlü girişimin politikalarla desteklenmesi gerekmektedir. Gerçekleştirilen çalışmada, Türkiye’nin 2050 yılına kadar sahip olacağı FV sistem kurulu güçleri ve oluşacak FV modül atık miktarları on yıllık pe...
Beykent Üniversitesi Fen ve Mühendislik Bilimleri Dergisi
Solar energy has advantages such as accessibility, applicability and predictability compared to o... more Solar energy has advantages such as accessibility, applicability and predictability compared to other renewable energy sources. This energy source is used for many purposes in the world. Photovoltaic panels provide applications such as generating electricity from solar energy or heating and cooling. Their performance changes depending on the PV panel material, the amount of solar radiation and the operating temperature factors. In the electrical energy conversion of PV systems, overheating of the PV module leads to a decrease in power generation and causes a decrease in efficiency. Therefore, there are cooling methods for cooling PV panels, and they are divided into passive and active. In this study, the properties of the phase change material (PCM) used in the cooling of PV panels are given. In addition, studies using PCM to reduce the temperature of PV panels and experimental and numerical studies that increase efficiency by using PCM for using thermal energy are discussed. In the...
Sustainable Recovery and Reutilization of Cereal Processing By-Products, 2018
Abstract Biobased products can be manufactured from various feedstocks. The increasing need for t... more Abstract Biobased products can be manufactured from various feedstocks. The increasing need for these products is the driving force for the growth of the biorefinery market. There is an ongoing debate whether bioproducts will replace fossil-based products. This chapter provides an overview of recent studies on the biorefinery concept and investigates its possible use for conversion of wheat bran into value-added biobased products. A large number of methods and technologies have been researched and developed, resulting in high recovery of sugars and value-added products. An overview of end products and by-products of wheat bran using diverse biorefinery concepts and their applications in the main sectors is demonstrated. In addition, market potential provides economic and scientific insights, and novel biorefinery concepts are identified and discussed in spite of comparing various biomass conversion technologies. This chapter also provides an outline of various steps involved in biochemical conversion of carbohydrates to biofuels, bioethanol, and biobutanols, and conversion of nature's most abundant aromatic polymer, lignin, to value-added products. The limitations of biomass development, lignocellulose deconstruction, specialty fuels, and bioproduct development from biomass are discussed by considering most of the workshop results together with future opportunities for basic research in support of a sustainable and commercially viable advanced biofuels and bioproducts industry. Bioeconomy is the sustainable production and conversion of biomass for a range of food, health, fiber, industrial, and energy products through the application of biotechnologies in biorefineries using nonfood plants and trees for industrial purposes. This chapter researches recent global trends and developments of scientific studies in the field of biorefinery concepts. The products of knowledge-based biorefinery are expected to have a one-third share of industrial production.
Preparative Biochemistry & Biotechnology, 2022
The production of lactic acid, a polylactic acid monomer from energy crop Miscanthus × giganteus ... more The production of lactic acid, a polylactic acid monomer from energy crop Miscanthus × giganteus lignocellulosic biomass cultivated in Izmir was investigated. Liquid hot water (LHW) pretreatment was carried out at a temperature range of 140-200 °C, pressure 100 to 200 bar and reaction time of 15-45 min at a fixed flow rate of 2 mL/min using D-optimal experimental plan. The optimum conditions were elicited as 140 °C, 100 bar and 45 minutes, yielding the highest reducing sugar content of 77.32 mg/g, whereas 1.25 mg/mL arabinose and 1.35 mg/mL xylose as monomeric sugars. Subsequently, the enzymatic hydrolysis was applied to the solid fraction. The optimum conditions for enzymatic hydrolysis were determined as 5% (w/v) solid/liquid ratio, 20 FPU/mL enzyme loading and 72 hours, revealing the highest amount of reducing sugar as 200 mg/mL. LHW hydrolysate was used as a production medium for lactic acid manufacturing in submerged fermentation by Rhizopus oryzae. The maximum lactic acid content was found to be 6.8 g/L at 24 hours, whereas the lactic acid yield was 0.28 g/L.h. The sequential design of LHW, followed by enzymatic hydrolysis and submerged lactic acid fermentation can be utilized in industry, contributing to the bioeconomy.
MISC-02 This study aims to compare cotton stalk based biochar obtained using hydrothermal carboni... more MISC-02 This study aims to compare cotton stalk based biochar obtained using hydrothermal carbonization and torrefaction. Experiments of hydrothermal carbonization (HTC) were carried out by varying temperature (170, 210 and 250 °C), reaction time (30, 45 and 60 min) and particle size (1, 2 and 3 mm). In the experiments of HTC of cotton stalk; temperature, reaction time and particle size effects were optimized via response surface estimation (RSM) with Box-Benhken. Optimum condition was determined 210 ̊C, 60 min and 2mm. Then torrefaction was conducted at the optimum condition. The results of hydrothermal carbonization and torrefaction were compared with considering high calorific value, energy yield, high mass yield, ash yield, carbon yield and energy consumption at the optimum condition.
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