Economic Performance of the SCE Stirling Dish

1995 ◽  
Vol 117 (3) ◽  
pp. 210-214 ◽  
Author(s):  
K. W. Stone ◽  
C. W. Lopez ◽  
R. E. McAlister
Keyword(s):  
Solar Energy ◽  
Economic Performance ◽  
Joint Venture ◽  
Field Testing ◽  
Power Production ◽  
Energy Conversion Efficiency ◽  
Energy Costs ◽  
Purchase Cost ◽  
Time Operation ◽  
Daily Energy

In 1982 McDonnell Douglas Aerospace (MDA) and United Stirling AB (USAB) of Sweden formed a joint venture to develop and market a solar Stirling dish system. Eight modules were built and extensively tested from 1984 to 1988. Power production and daily energy-conversion efficiency as determined by field testing were characterized and modeled into a computer program. Included in this simulation are models of mirror soiling rate, wind spillage loss, mirror washing, and other maintenance outage time, operation and maintenance (O&M) costs, and equipment purchase cost. An economic model of a hybrid (combustion) receiver has been included in the simulation for illustrating the value of using solar energy when available and other fuels such as methane, natural gas, hydrogen, etc. when solar energy is not available or adequate. This paper describes the simulation and presents comparisons of the simulation to test data. The simulation also estimates both the O&M expenses and levelized energy costs for different production volumes.

Will Strategy Prevail over Economics? An Analysis of Charanka Solar Park in Gujarat

2016 ◽  
Vol 5 (2) ◽  
pp. 162-167
Author(s):  
Saif Siddiqui ◽  
Sumaira Jan
Keyword(s):  
Solar Energy ◽  
Solar Power ◽  
Power Production ◽  
Energy Crisis ◽  
Energy Sources ◽  
Potential Source ◽  
The World ◽  
Made In

The Charanka Solar Park, one of the world’s largest multi-developer and multi-beneficiary solar parks, is the hub of solar power production in India. It contributes about 6 per cent to the total solar power production in the country. Although solar power is more expensive than the traditional power in the country, its sheen is still not high to make it a potential source to eliminate energy crisis not just in India but all across the world. Researchers are continuously pushing their envelope to explore as to why solar energy should be adopted over traditional energy sources irrespective of the fact that it is more expensive. The war between its financial and strategic viability is going on. Efforts are being made in the direction of reducing its costs and making it as a financially viable and strategically active option. This case is an attempt in the same direction. We are using Charanka Solar Park as a base to explore if there is any future for such projects in the country. There are projects which are no doubt operational but their long-term viability is truly questionable.

Optimization of Solar Terrestrial Power Production Using Heat Engines

1970 ◽  
Vol 92 (2) ◽  
pp. 173-181 ◽  
Author(s):  
M. K. Selc¸uk ◽  
G. T. Ward
Keyword(s):  
Mathematical Model ◽  
Economic Performance ◽  
Storage System ◽  
Power Production ◽  
Design Parameters ◽  
Unsteady State ◽  
Labor Costs ◽  
Specific Design ◽  
Heat Engines ◽  
Power Costs

Mathematical model and computer programs have been developed for the analysis of the economic performance of a terrestrial solar power system using heat engines. Various combinations of cycle, collector, engine, storage system, and sink have been studied and the influence of design parameters on power costs examined for both the steady and unsteady state cases. Typical minimum power costs under central Australian conditions for units of 12 kw capacity at current levels of materials and labor costs range from 7 to 47 U. S. cents per kwh, according to the specific design of installation.

Energy costs of feeding activities and energy expenditure of grazing sheep

1964 ◽  
Vol 15 (6) ◽  
pp. 969 ◽  
Author(s):  
N McCGraham
Keyword(s):  
Body Weight ◽  
Food Intake ◽  
Energy Expenditure ◽  
Laboratory Experiments ◽  
Energy Costs ◽  
Body Weights ◽  
Daily Energy ◽  
Feeding Activities ◽  
The Cost ◽  
Grazing Behaviour

The energy costs of standing, of rumination, of eating prepared meals, and of grazing were determined in laboratory experiments by indirect calorimetry. Sheep with body weights ranging from 30 to 110 kg were used. Energy expenditure due to standing amounted to 0.34 ± 0.02 kcal/hr/kg body weight. The energy cost of rumination was 0.24 ± 0.03 kcal/hr/kg. Rate of food intake varied from 60 g dry matter/hr with sheep grazing a poor sward to 800 g/hr with sheep eating hay, but in general this did not affect energy expenditure appreciably. The cost of eating prepared meals of either fresh herbage or hay was 0.54 ± 0.05 kcal/hr/kg body weight. It tended to be greatest when rate of food intake was greatest. Energy expenditure due to grazing was also 0.54 ± 0.05 kcal/hr/kg, irrespective of the type of sward and associated grazing behaviour. It is estimated that muscular work, mainly standing and eating, could account for nearly 40% of the daily energy expenditure of a sheep at maintenance, grazing a poor but level pasture, with drinking water available, and only 10% of that of a caged animal. Such a grazing animal could thus have requirements over 40% greater than those of a caged one. With sheep on hilly pasture or a long way from water, the cost of walking could become a major item.

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