Direct absorption receiver research
This paper describes the results of materials and thermal evaluation of a flowing film liquid direct absorption receiver (DAR) concept. Results of preliminary analytical studies conducted to assess the requirements on the thermal and materials performance and to assess the cost potential of such a receiver are also included. Experiments were conducted with concentrated solar flux at the Advanced Components Test Facility (ACTF) in Atlanta, Georgia. Data are presented that support analysis of the film stability at high and low flow rates, thermal efficiency, and heat transfer (between the salt and the absorber plate). Comparisons of the data with analytical predictions of thermal efficiency and heat transfer suggest a thermal efficiency of 80 to 90%, depending on operating temperature and flux. Heat transfer coefficients (for the undoped salt) of about 3000 W/m/sup 20/C were observed. No flow instabilities at high flow rates (Reynolds number up to 1200) were observed. However, a dry-out problem for flow rates below that was observed that may be due to experimental artifacts. The materials used for this salt film and the back plate were analyzed to determine corrosion and other effects that may occur in the presence of concentrated sunlight. Based on the analysis of all available information, the DAR concept was judged technically feasible.
- Research Organization:
- Solar Energy Research Inst., Golden, CO (USA)
- DOE Contract Number:
- AC02-83CH10093
- OSTI ID:
- 5540296
- Report Number(s):
- SERI/TP-250-2969; CONF-8606160-1; ON: DE86010716
- Country of Publication:
- United States
- Language:
- English
Similar Records
Experiments and analysis on the molten-salt direct-contact absorption receiver concept
Direct absorption receiver (DAR) systems assessment