| Bibliographic Citation | |
| Full Text |
loading...
|
|---|---|
| DOI | 10.2172/676960 |
| Title | Comparison of natural convection heat exchangers for solar water heating systems |
| Creator/Author | Davidson, J. ; Liu, W. |
| Publication Date | 1998 Sep 15 |
| OSTI Identifier | OSTI ID: 676960; Legacy ID: DE99000981 |
| Report Number(s) | DOE/GO/10030--T1 |
| DOE Contract Number | FG36-94GO10030 |
| DOI | 10.2172/676960 |
| Other Number(s) | Other: ON: DE99000981; TRN: TRN: AHC29821%%93 |
| Resource Type | Technical Report |
| Resource Relation | Other Information: PBD: 15 Sep 1998 |
| Research Org | Univ. of Minnesota, Dept. of Mechanical Engineering, Minneapolis, MN (United States) |
| Sponsoring Org | USDOE Office of Energy Research, Washington, DC (United States) |
| Subject | 14 SOLAR ENERGY; SOLAR WATER HEATERS; PASSIVE SOLAR WATER HEATERS; THERMOSYPHON EFFECT; WATER PUMPS; COMPARATIVE EVALUATIONS; HEAT EXCHANGERS; FRICTION FACTOR |
| Description/Abstract | Thermosyphon heat exchangers are used in indirect solar water heating systems to avoid using a pump to circulate water from the storage tank to the heat exchanger. In this study, the authors consider the effect of heat exchanger design on system performance. They also compare performance of a system with thermosyphon flow to the same system with a 40W pump in the water loop. In the first part of the study, the authors consider the impact of heat exchanger design on the thermal performance of both one- and two-collector solar water heaters. The comparison is based on Solar Rating and Certification Corporation (SRCC) OG300 simulations. The thermosyphon heat exchangers considered are (1) a one-pass, double wall, 0.22 m{sup 2}, four tube-in-shell heat exchanger manufactured by AAA Service and Supply, Inc., (the Quad-Rod); (2) a two-pass, double wall, 0.2 m{sup 2}, tube-in-shell made by Heliodyne, Inc., but not intended for commercial development; (3) a one-pass, single wall, 0.28 m{sup 2}, 31 tube-in-shell heat exchanger from Young Radiator Company, and (4) a one-pass single-wall, 0.61 m{sup 2}, four coil-in-shell heat exchanger made by ThermoDynamics Ltd. The authors compare performance of the systems with thermosyphon heat exchangers to a system with a 40 W pump used with the Quad-Rod heat exchanger. In the second part of the study, the effects of reducing frictional losses through the heat exchanger and/or the pipes connecting the heat exchanger to the storage tank, and increasing heat transfer area are evaluated in terms of OG300 ratings. |
| Country of Publication | United States |
| Language | English |
| Format | Medium: ED; Size: 19 p. |
| Availability | OSTI as DE99000981 To purchase this media from NTIS, click here |
| System Entry Date | 2009 Dec 11 |
| Document Discussions | |
Top | |
