Performance analysis of a thermosyphon solar water heating system. Part 2: Nighttime performance
- Ain Shams Univ., Cairo (Egypt). Dept. of Mechanical Engineering
The paper presents an experimental and theoretical analysis of the performance of a thermosyphon solar water heating system under actual operating conditions during nighttime. The system consisted of a 1.8 m by 0.8 m flat plate collector and a 100 liter tank. Detailed temperature-time curves for the system over a 24 hour period were recorded using a stand alone microprocessor-based measurement and control system. Nighttime mass flow rates were calculated using several methods, based on the recorded temperature-time curves, the governing conservation equations and the system thermal losses. Deduced nighttime mass flow rates are in the order of 0.005 kg/sec. The effect of reverse flow was found to increase the system thermal losses by nearly fourfold.
- OSTI ID:
- 116242
- Report Number(s):
- CONF-950336-; ISBN 0-7918-1300-2; TRN: IM9545%%209
- Resource Relation:
- Conference: American Society of Mechanical Engineers/Japanese Society of Mechanical Engineers/Japan Solar Energy Society international solar energy conference, Lahaina, HI (United States), 19-24 Mar 1995; Other Information: PBD: 1995; Related Information: Is Part Of Solar engineering 1995: Proceedings. Volume 2; Stine, W.B. [ed.] [California Polytechnic Univ., Pomona, CA (United States)]; Tanaka, Tadayoshi [ed.] [Electrotechnical Lab., Ibaraki (Japan)]; Claridge, D.E. [ed.] [Texas A and M Univ., College Station, TX (United States)]; PB: 582 p.
- Country of Publication:
- United States
- Language:
- English
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