The possible energy gain in the case of two axes tracking as well as a fixed system with Equator facing tilted solar PV module with latitude angle and daily optimum slope is calculated basing on Hottel clear sky radiation model (HM) and... more
The possible energy gain in the case of two axes tracking as well as a fixed system with Equator facing tilted solar PV module with latitude angle and daily optimum slope is calculated basing on Hottel clear sky radiation model (HM) and ex-terrestrial solar radiation model (ESRM). The calculated results are compared with the data obtained from a PV system with 252 Wpeak power module installed on a two axes solar tracker which was designed and constructed locally. The main components of the tracker are introduced. It was found that, the maximum possible energy gain calculated basing on HM and ESRM are practically identic. For example, on 25 August from 8 O’clock to solar noon, the hourly energy gain values of HM are 1.672, 1.336, 1.170, 1.098 and 1.097 while they are 1.677, 1.337, 1.170, 1.098 and 1.098 in the case of ESRM. The corresponding measured values on the same day are 1.746, 1.36, 1.16, 1.043 and 1.027. Thus, the theoretical data are consistent with the measured ones. Moreover, it was found that the tracked system is more economic feasible than latitude tilted similar one with a relative solar energy gain of 0.32%.
An Electronic Medical Record (EMR) is a patient’s database record that can be transmitted securely. There are a diversity of EMR systems for different medical units to choose from. The structure and value of these systems is the focus of... more
An Electronic Medical Record (EMR) is a patient’s database record that can be transmitted securely. There are a diversity of EMR systems for different medical units to choose from. The structure and value of these systems is the focus of this qualitative study, from a medical professional’s standpoint, as well as its economic value and whether it should be shared between health organizations. The study took place in the natural setting of the medical units’ environments. A purposive sample of 40 professionals in Greece and Oman, was interviewed. The study suggests that: (1) The demographics of the EMR should be divided in categories, not all of them accessible and/or visible by all; (2) The EMR system should follow an open architecture so that more categories and subcategories can be added as needed and following a possible business plan (ERD is suggested); (3) The EMR should be implemented gradually bearing in mind both medical and financial concerns; (4) Sharing should be a patient’s decision as the owner of the record. Reaching a certain level of maturity of its implementation and utilization, it is useful to seek the professionals’ assessment on the structure and value of such a system.
BACKGROUND: The potential of Origanum syriacum L. to become a cultivated crop in Lebanon rather than being harvested from the wild was investigated at the production, postharvest and economic levels. Three irrigation schemes were tested... more
BACKGROUND: The potential of Origanum syriacum L. to become a cultivated crop in Lebanon rather than being harvested from the wild was investigated at the production, postharvest and economic levels. Three irrigation schemes were tested on growth parameters of cultivated oregano plants. In order to identify the most quality-preserving drying technique, air-, oven (30 °C)- and freeze-dried oregano samples were assessed through sensory analysis. Cost/benefit analysis was used to compare the economic potential of O. syriacum in four production scenarios.
RESULTS: An irrigation scheme of 16 L per plant administered every 2 weeks (medium irrigation) during the dry period resulted in a doubling of the horticultural (56.34%) and hydro-distilled essential oil (55.22%) yields. Descriptive sensory analysis showed that air-dried material had the desired flavour, aroma and colour attributes. Net present values ranged from − 677 406.02 to 562 301.5 US$ and benefit/cost ratios from 0.5341 to 5.1993 for a 1 ha, 5 year life-cycle oregano farm.
Objective. To assess the economic and financial feasibility of traditional silvopastoral systems for the biofuels production as a contribution to the sustainability of " Piñón for Galapagos " project. Materials and methods. A survey was... more
Objective. To assess the economic and financial feasibility of traditional silvopastoral systems for the biofuels production as a contribution to the sustainability of " Piñón for Galapagos " project. Materials and methods. A survey was conducted to 450 small livestock producer in 10 cantons of the Manabí province in order to collect basic agronomic knowledge, management, establishment and costs involved in production of the Piñón ((Jatropha curcas L.)/Savoy (Megathyrsus maximus) silvopastoral systems. For Piñón CP041 production recording plantation in live fence were stablished and for the tradition Piñón, the production of 10 sites were recorded, both systems since 2009. With those data were calculated the following economic indicators: ratio benefit/cost, net present value (NPV), internal rate ratio (IRR) and land expectation value (LEV). Results. The study exhibited a production decrease of Piñón with the passage of time. The CP041 INIAP improved silvopastoral system Piñón showed a B/C 1.07, NPV of USD$ 404.11, LEV US$ 970.23 and IRR of 18%. Followed by silvopastoral system with a local Piñón with a B/C 1.06, NPV of USD$ 363.66, LEV USD$ 873.10 and IRR of 17% and finally silvopastoral system without harvesting Piñón with a B/C 1.05, NPV of USD$ 285.72, LEV USD$ 685.99 and IRR of 15%. Conclusions. The alternative biofuels production was the silvopastoral systems (INIAP CP041)/Savoya in Manabí and is economically feasible. This system does not compete for arable land for food production and would not affect food security.
Jordan is one of the ten most water-deprived countries in the world. The scarcity of water resources is one of the main challenges facing the country considering the increasing demand on water resources due to high growth in population... more
Jordan is one of the ten most water-deprived countries in the world. The scarcity of water resources is one of the main challenges facing the country considering the increasing demand on water resources due to high growth in population and improvement in the quality of life. To meet the increasing demands, the country has undertaken extensive reform and investment measures in the water sector over the past decade including the construction of several dams for irrigation, municipal uses and recharge. However, the construction of dams is costly and may have diverse social and environmental impacts. Therefore, a decision to construct a dam is typically based on its financial and economic feasibility as well as on the assessment of its social and economic impacts. This paper presents the economic feasibility of the proposed Al-Karak dam. The dam is intended for efficient utilization and management of Wadi Al-Karak flood and base flow for irrigation of Ghor Al-Mazra farm area and for pos...
his paper presents the selection of the best potential wind resource from preliminary wind atlas, and studies the economic feasibility analysis of these sites by matching with the wind data of each site and characteristics of low wind speed... more
his paper presents the selection of the best potential wind resource from preliminary wind atlas, and studies the economic feasibility analysis of these sites by matching with the wind data of each site and characteristics of low wind speed wind turbine. The selected sites are emerging from Arakan, Pathein, Yangon and Ye, which are likely to be facilitating areas from isolated-grid and other off-grid. Therefore, eight low wind speed wind turbines are selected from product data sheet of RETScreen and matched with wind data of each site for assessing the economic feasibility. The best wind turbine is Enrgie (PGE 20/25-25m) for each site to get the lowest price, the highest capacity factor, the maximum energy production and the greatest green house gas (GHG) emission reduction. To check the economic feasibility of this project, the parameter of net present value (NPV), internal rate of return (IRR) and simple payback period (SPB) are adjusted for verification of sustainable developmen...
Solar energy is one of the renewable energy sources which is abundant and pollution free. Over the years it has grown rapidly in the field of agriculture for the purpose of food preservation. The use of solar energy to dry agricultural... more
Solar energy is one of the renewable energy sources which is abundant and pollution free. Over the years it has grown rapidly in the field of agriculture for the purpose of food preservation. The use of solar energy to dry agricultural products can be achieved using three techniques, namely, direct solar drying, indirect solar drying, and mixed-mode solar drying. Drying of agricultural products is usually modelled as either thin layer or deep bed layer. Various researchers have conducted numerous experiments and simulations to study and model the performance output of solar dryers in terms of the outlet temperature, type of heat collector, drying air velocity, drying period, and moisture removal rate. In this paper a review is presented on the dif erent techniques used in solar drying, dif erent aspects of solar drying, and modelling of thin layer and deep bed. In addition, principles of operation of solar drying systems and practical examples of some of the available solar dryer systems are presented. The main objective of this review is to identify areas of improvement in solar grain drying systems that need to be addressed for performance enhancement and quality assurance of the relevant solar drying technologies
Companiganj is one of the resourceful upazila of Sylhet district, though no gas or oil field have not been found yet, renowned for its hard rock. Hard rock, one of the main geo-resources of Bangladesh after gas and coal, is very useful in... more
Companiganj is one of the resourceful upazila of Sylhet district, though no gas or oil field have not been found yet, renowned for its hard rock. Hard rock, one of the main geo-resources of Bangladesh after gas and coal, is very useful in construction sector and cement industry. The source of this rock is near Meghalaya of India. This part of India is relatively in higher than the ground level of Bangladesh. That’s why the rock comes down by gravity especially in the rainy season. The water is the main transportation media which brings these rocks. People normally use manual hand tools for rock extraction and use two type of crusher to crush these rocks. In this research paper, we tried to find the economic feasibility of extracting these rocks. Though the extraction method of this quarry is not technologically advanced, but after doing this research, we can say that this quarry is economically feasible.
