Direct absorption receiver control studies
In a solar central receiver system Direct Absorption Receiver (DAR), the heat absorbing fluid (a blackened molten nitrate salt) flows in a thin film down a vertical panel (rather than through tubes as in conventional receiver designs) and absorbs the concentrated solar flux directly. This unique flow system presents different control requirements than other receiver systems. In this paper we discuss these requirements, including analyses of multiple control zones for various receiver geometries and steady-state flux patterns. These results show that as few as 9 to 13 control zones can provide adequate operation of the receiver under nearly all conditions. We also discuss the simple outlet-temperature-feedback control algorithm developed to control the DAR during cloud transients and present system thermal/hydraulic responses to various transient conditions. 11 refs., 9 figs., 3 tabs.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5453774
- Report Number(s):
- SAND-87-1424C; CONF-880320-1-Draft; ON: DE87013653
- Country of Publication:
- United States
- Language:
- English
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