Central Receiver System (CRS) in the Small Solar Power Systems Project (SSPS) of the International Energy Agency (IEA)

1984 ◽  
Vol 106 (1) ◽  
pp. 59-65 ◽  
Author(s):  
W. Grasse ◽  
M. Becker
Keyword(s):  
Power Systems ◽  
Solar Power ◽  
International Energy Agency ◽  
Energy Agency ◽  
Central Receiver ◽  
Receiver System

Evaluation of Advanced Sodium Receiver Losses During Operation of the IEA/SSPS Central Receiver System

1989 ◽  
Vol 111 (1) ◽  
pp. 24-31 ◽  
Author(s):  
R. Carmona ◽  
F. Rosa ◽  
H. Jacobs ◽  
M. Sa´nchez
Keyword(s):  
Power Systems ◽  
Reverse Flow ◽  
Theoretical Calculations ◽  
International Energy Agency ◽  
Test Results ◽  
Optical Losses ◽  
Energy Agency ◽  
Central Receiver ◽  
Receiver System ◽  
Receiver Performance

This article presents the measurements and experiments conducted on the external receiver: the so-called Advanced Sodium Receiver (ASR) of the Small Solar Power Systems (SSPS) Project of the International Energy Agency (IEA) in southern Spain. The basis of this experiment was to provide loss measurements for later use in determining receiver performance. The tests to evaluate thermal losses consisted in operating the receiver with the doors open and circulating the sodium in normal and reverse flow without providing any incident power from the heliostat field (flux-off technique). In this way, total thermal losses are calculated as the energy lost by the sodium. Radiative losses have been calculated based on theoretical calculations and some results have been compared with infrared thermography measurements. Conductive losses are small and have been estimated by flux-off experiments with the receiver doors closed. Convective losses were evaluated subtracting radiative and conductive losses from the total thermal losses. Optical losses were assessed using absorptance measurements of the receiver coating. A simplified analytical model has been developed to calculate losses and ASR efficiency during operation. In spite of the method’s simplicity, the results are very similar to those found by other investigators, verified simulation programs, and test results.

Performance of the SSPS Solar Power Plants at Almeria

1988 ◽  
Vol 110 (4) ◽  
pp. 235-247 ◽  
Author(s):  
Gunnar Wettermark
Keyword(s):  
Power Systems ◽  
Power Plants ◽  
Solar Power ◽  
International Energy Agency ◽  
Electricity Consumption ◽  
Thermal Inertia ◽  
Energy Agency ◽  
Planning Stage ◽  
Receiver System ◽  
Solar Power Plants

The article summarizes the results of the operation of the two solar power plants of the SSPS project (Small Solar Power Systems) at Almeria, carried out within the framework of the International Energy Agency. The two power plants were built side by side in order to compare two thermal-electric techniques, one being a distributed collector system (DCS) with arrays of parabolic troughs and the other a central receiver system (CRS) with heliostats concentrating the sunlight onto the top of a tower. Each plant was constructed with a nominal capacity of 500 kWel and was expected to have a net yearly output on the order of 1 GWh.—Only the DCS plant was in operation sufficiently to enable an assessment of possible annual production of electricity. Through extrapolation one finds that the gross output of the built plant was maximal 0.25 GWh with an overall efficiency of 2.3 percent for a plant with 100 percent availability and no malfunctions. Internal electricity consumption correspondingly calculated amounts to 0.11 GWh resulting in only 0.14 GWh yearly net output. Using the experimental values from the CRS plant, it appears that its yearly gross output could have been similar to that of the DCS plant but at higher internal electricity consumption, particularly due to the trace heating of the heat transfer medium (sodium).—The technical reasons for the poor efficiency of the SSPS installation were largely that the solar climate was less favorable then assumed, dirt accumulated on the mirrors at a more rapid rate than foreseen, the nonsolar specific components were badly matched and yielded low efficiencies, and thermal inertia was crucial and almost overlooked in the planning stage.—A detailed loss analysis is presented in the article.

scholarly journals Solar Thermal Power: Appraisal of Solar Power Towers

2018 ◽  
Vol 225 ◽  
pp. 04003
Author(s):  
Hashem Shatnawi ◽  
Chin Wai Lim ◽  
Firas Basim Ismail
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Solar Power ◽  
Thermal Power ◽  
Tube Material ◽  
Power Cycles ◽  
Solar Thermal Power ◽  
Central Receiver ◽  
Receiver System ◽  
Solar Power Tower

This study delves into several engineering procedures related to solar power tower plants. These installations come with central receiver system technologies and high-temperature power cycles. Besides a summary emphasizing on the fundamental components of a solar power tower, this paper also forwards a description of three receiver designs. Namely, these are the tubular receiver, the volumetric receiver and the direct absorber receiver. A variety of heat transfer mediums were assessed, while a comprehensive explanation was provided on the elements of external solar cylindrical receivers. This explanation covers tube material, molten salt, tube diameter and heat flux.

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