Comparison of Natural Convection Heat Exchangers for Solar Water Heating Systems

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Total Pages : 19 pages
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Book Synopsis Comparison of Natural Convection Heat Exchangers for Solar Water Heating Systems by :

Download or read book Comparison of Natural Convection Heat Exchangers for Solar Water Heating Systems written by and published by . This book was released on 1998 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 m2, four tube-in-shell heat exchanger manufactured by AAA Service and Supply, Inc., (the Quad-Rod); (2) a two-pass, double wall, 0.2 m2, tube-in-shell made by Heliodyne, Inc., but not intended for commercial development; (3) a one-pass, single wall, 0.28 m2, 31 tube-in-shell heat exchanger from Young Radiator Company, and (4) a one-pass single-wall, 0.61 m2, 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.

Natural Convection Heat Exchangers for Solar Water Heating Systems. Technical Progress Report, February 1, 1996--March 31, 1996

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Total Pages : 8 pages
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Book Synopsis Natural Convection Heat Exchangers for Solar Water Heating Systems. Technical Progress Report, February 1, 1996--March 31, 1996 by :

Download or read book Natural Convection Heat Exchangers for Solar Water Heating Systems. Technical Progress Report, February 1, 1996--March 31, 1996 written by and published by . This book was released on 1998 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: This progress report describes the thermodynamic testing and modeling of a thermosyphon heat exchanger used in solar water heating systems. Testing of a four tube-in-shell thermosyphon heat exchanger was performed in two parts. The first portion of the test increased the collector fluid while the storage tank remained isothermal. After the collector fluid temperature was raised to 95 C, the second part of the test allowed the storage tank to gain heat. The test was performed for two collector flow rates. Measured values included collector side forced flow rate, temperature differences across the heat exchanger, vertical temperature distribution in the storage tank, vertical water temperature profile in the heat exchanger, and pressure drop on the thermosyphon side of the heat exchanger. The overall heat transfer coefficient-area product (UA) values obtained confirmed that models which assume UA depends solely on thermosyphon flow rate do not adequately characterize thermosyphon heat exchangers. This is because heat transfer in thermosyphon exchangers occurs in the mixed convection, rather than forced flow, regime. A linear regression equation was developed to better predict UA using the Prandtl, Reynolds, and Grashof numbers and dimensionless parameters based on fluid properties calculated for the average hot and cold leg temperatures. 9 figs.

Natural Convection Heat Exchangers for Solar Water Heating Systems. Technical Progress Report, September 15, 1996--November 14, 1996

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ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (684 download)

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Book Synopsis Natural Convection Heat Exchangers for Solar Water Heating Systems. Technical Progress Report, September 15, 1996--November 14, 1996 by :

Download or read book Natural Convection Heat Exchangers for Solar Water Heating Systems. Technical Progress Report, September 15, 1996--November 14, 1996 written by and published by . This book was released on 1998 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goals of this project are: (1) to develop guidelines for the design and use of thermosyphon side-arm heat exchangers in solar domestic water heating systems, and (2) to establish appropriate modeling and testing criteria for evaluating the performance of systems using this type of heat exchanger. The tasks for the project are as follows: (1) Develop a model of the thermal performance of thermosyphon heat exchangers in solar water heating applications. A test protocol will be developed which minimizes the number of tests required to adequately account for mixed convection effects. The TRNSYS component model will be fully integrated in a system component model and will use data acquired with the specified test protocol. (2) Conduct a fundamental study to establish friction and heat transfer correlations for conditions and geometries typical of thermosyphon heat exchangers in solar systems. Data will be obtained as a function of a buoyancy parameter based on Grashof and Reynolds numbers. The experimental domain will encompass the ranges expected in solar water heating systems.

Natural Convection Heat Exchangers for Solar Water Heating Systems. Technical Progress Report, May 15, 1996--July 14, 1996

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ISBN 13 :
Total Pages : 13 pages
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Book Synopsis Natural Convection Heat Exchangers for Solar Water Heating Systems. Technical Progress Report, May 15, 1996--July 14, 1996 by :

Download or read book Natural Convection Heat Exchangers for Solar Water Heating Systems. Technical Progress Report, May 15, 1996--July 14, 1996 written by and published by . This book was released on 1998 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: This progress report very briefly summarizes study results and includes an experimental plan developed for the fundamental study of heat transfer in thermosyphon side-arm heat exchangers. The study will investigate the influence of the Reynolds and Grashof numbers on the thermosyphon flow side of the heat exchanger, and the influence of the flow rate on the forced flow side of the heat exchanger. Detailed temperature, flow rate, and pressure data will be obtained for four, seven, and nine tube-in-shell heat exchanger designs. Correlations will be developed for the heat transfer and friction coefficients, and a semi-empirical model will be developed to predict the performance of thermosyphon heat exchangers in solar water heaters.

Natural Convection Heat Exchangers for Solar Water Heating Systems. Techniacl Progress Report, June 1, 1995--July 31, 1995

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ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (684 download)

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Book Synopsis Natural Convection Heat Exchangers for Solar Water Heating Systems. Techniacl Progress Report, June 1, 1995--July 31, 1995 by :

Download or read book Natural Convection Heat Exchangers for Solar Water Heating Systems. Techniacl Progress Report, June 1, 1995--July 31, 1995 written by and published by . This book was released on 1998 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goals of this project are: (1) to develop guidelines for the design and use of thermosyphon side-arm heat exchangers in solar domestic water heating systems, and (2) to establish appropriate modeling and testing criteria for evaluating the performance of systems using this type of heat exchanger. The tasks for the project are as follows: (1) Develop a model of the thermal performance of thermosyphon heat exchangers in solar water heating applications. A test protocol will be developed which minimizes the number of tests required to adequately account for mixed convection effects. The TRNSYS component model will be fully integrated in a system component model and will use data acquired with the specified test protocol. (2) Conduct a fundamental study to establish friction and heat transfer correlations for conditions and geometries typical of thermosyphon heat exchangers in solar systems. Data will be obtained as a function of a buoyancy parameter based on Grashof and Reynolds numbers. The experimental domain will encompass the ranges expected in solar water heating systems.

Natural Convection Heat Exchangers for Solar Water Heating Systems. Technical Progress Report, December 31, 1995--January 31, 1996

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ISBN 13 :
Total Pages : 6 pages
Book Rating : 4.:/5 (684 download)

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Book Synopsis Natural Convection Heat Exchangers for Solar Water Heating Systems. Technical Progress Report, December 31, 1995--January 31, 1996 by :

Download or read book Natural Convection Heat Exchangers for Solar Water Heating Systems. Technical Progress Report, December 31, 1995--January 31, 1996 written by and published by . This book was released on 1998 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goals of this project are: (1) to develop guidelines for the design and use of thermosyphon side-arm heat exchangers in solar domestic water heating systems, and (2) to establish appropriate modeling and testing criteria for evaluating the performance of systems using this type of heat exchanger. The tasks for the project are as follows: (1) Develop a model of the thermal performance of thermosyphon heat exchangers in solar water heating applications. A test protocol will be developed which minimizes the number of tests required to adequately account for mixed convection effects. The TRNSYS component model will be fully integrated in a system component model and will use data acquired with the specified test protocol. (2) Conduct a fundamental study to establish friction and heat transfer correlations for conditions and geometries typical of thermosyphon heat exchangers in solar systems. Data will be obtained as a function of a buoyancy parameter based on Grashof and Reynolds numbers. The experimental domain will encompass the ranges expected in solar water heating systems.

Natural Convection Heat Exchangers for Solar Water Heating Systems. Technical Progress Report, July 15, 1996--September 14, 1996

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ISBN 13 :
Total Pages : 2 pages
Book Rating : 4.:/5 (684 download)

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Book Synopsis Natural Convection Heat Exchangers for Solar Water Heating Systems. Technical Progress Report, July 15, 1996--September 14, 1996 by :

Download or read book Natural Convection Heat Exchangers for Solar Water Heating Systems. Technical Progress Report, July 15, 1996--September 14, 1996 written by and published by . This book was released on 1998 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report very briefly summarizes project objectives, results, and current activities. The goals of the project are: (1) to develop guidelines for the design and use of thermosypohon side-arm heat exchangers in solar domestic water heating systems, and (2) to establish appropriate modeling and testing criteria for evaluating the performance of systems using this type of heat exchanger. Results include the experimental study of thermosyphon heat exchangers, which led to modeling equations that correlate the overall heat transfer coefficient-area product (UA) to mixed convection regime parameters. Current activities include the development and evaluation of a side-arm heat exchanger computer model and modification of the experimental facility for fundamental heat exchanger studies.

Natural Convection Heat Exchangers for Solar Water Heating Systems. Technical Progress Report, August 1, 1995--September 30, 1995

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ISBN 13 :
Total Pages : 9 pages
Book Rating : 4.:/5 (684 download)

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Book Synopsis Natural Convection Heat Exchangers for Solar Water Heating Systems. Technical Progress Report, August 1, 1995--September 30, 1995 by :

Download or read book Natural Convection Heat Exchangers for Solar Water Heating Systems. Technical Progress Report, August 1, 1995--September 30, 1995 written by and published by . This book was released on 1998 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goals of this project are: (1) to develop guidelines for the design and use of thermosyphon side-arm heat exchangers in solar domestic water heating systems, and (2) to establish appropriate modeling and testing criteria for evaluating the performance of systems using this type of heat exchanger. The tasks for the project are as follows: (1) Develop a model of the thermal performance of thermosyphon heat exchangers in solar water heating applications. A test protocol will be developed which minimizes the number of tests required to adequately account for mixed convection effects. The TRNSYS component model will be fully integrated in a system component model and will use data acquired with the specified test protocol. (2) Conduct a fundamental study to establish friction and heat transfer correlations for conditions and geometries typical of thermosyphon heat exchangers in solar systems. Data will be obtained as a function of a buoyancy parameter based on Grashof and Reynolds numbers. The experimental domain will encompass the ranges expected in solar water heating systems.

Natural Convection Heat Exchangers for Solar Water Heating Systems. Technical Progress Report, April 1, 1995--May 31, 1995

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ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (684 download)

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Book Synopsis Natural Convection Heat Exchangers for Solar Water Heating Systems. Technical Progress Report, April 1, 1995--May 31, 1995 by :

Download or read book Natural Convection Heat Exchangers for Solar Water Heating Systems. Technical Progress Report, April 1, 1995--May 31, 1995 written by and published by . This book was released on 1998 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goals of this project are: (1) to develop guidelines for the design and use of thermosypohon side-arm heat exchangers in solar domestic water heating systems, and (2) to establish appropriate modeling and testing criteria for evaluating the performance of systems using this type of heat exchanger.

О долге и чести воинской в российской армии

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ISBN 13 :
Total Pages : 364 pages
Book Rating : 4.:/5 (249 download)

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Book Synopsis О долге и чести воинской в российской армии by : Ю. А. Галушко

Download or read book О долге и чести воинской в российской армии written by Ю. А. Галушко and published by . This book was released on 1990 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Modeling of a Natural Convection Heat Exchanger in a Solar Domestic Hot Water System

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ISBN 13 :
Total Pages : 528 pages
Book Rating : 4.:/5 (89 download)

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Book Synopsis The Modeling of a Natural Convection Heat Exchanger in a Solar Domestic Hot Water System by : John Avina

Download or read book The Modeling of a Natural Convection Heat Exchanger in a Solar Domestic Hot Water System written by John Avina and published by . This book was released on 1995 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Analysis of Thermosyphon Heat Exchangers for Use in Solar Domestic Hot Water Heating Systems

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ISBN 13 :
Total Pages : 330 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Analysis of Thermosyphon Heat Exchangers for Use in Solar Domestic Hot Water Heating Systems by : Scott David Dahl

Download or read book Analysis of Thermosyphon Heat Exchangers for Use in Solar Domestic Hot Water Heating Systems written by Scott David Dahl and published by . This book was released on 1998 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Natural Convection Heat Exchangers for Solar Water Heating Systems. Technical Progress Report, November 15, 1996--January 14, 1997

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ISBN 13 :
Total Pages : 6 pages
Book Rating : 4.:/5 (684 download)

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Book Synopsis Natural Convection Heat Exchangers for Solar Water Heating Systems. Technical Progress Report, November 15, 1996--January 14, 1997 by :

Download or read book Natural Convection Heat Exchangers for Solar Water Heating Systems. Technical Progress Report, November 15, 1996--January 14, 1997 written by and published by . This book was released on 1998 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goals of this project are: (1) to develop guidelines for the design and use of thermosypohon side-arm heat exchangers in solar domestic water heating systems, and (2) to establish appropriate modeling and testing criteria for evaluating the performance of systems using this type of heat exchanger.

Natural Convection Heat Transfer from Horizontal Tube Bundles Immersed in Tilted Thin Enclosures

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ISBN 13 :
Total Pages : 726 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Natural Convection Heat Transfer from Horizontal Tube Bundles Immersed in Tilted Thin Enclosures by : Wei Liu

Download or read book Natural Convection Heat Transfer from Horizontal Tube Bundles Immersed in Tilted Thin Enclosures written by Wei Liu and published by . This book was released on 2003 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt:

An Empirical Model of an Immersed Natural Convection Heat Exchanger in a Solar Domestic Hot Water System

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ISBN 13 :
Total Pages : 160 pages
Book Rating : 4.:/5 (361 download)

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Book Synopsis An Empirical Model of an Immersed Natural Convection Heat Exchanger in a Solar Domestic Hot Water System by : John J. Arent

Download or read book An Empirical Model of an Immersed Natural Convection Heat Exchanger in a Solar Domestic Hot Water System written by John J. Arent and published by . This book was released on 1996 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Thermal Modelling of Plate Heat Exchangers in Natural Convection Solar Domestic Hot Water Systems

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ISBN 13 :
Total Pages : pages
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Book Synopsis Thermal Modelling of Plate Heat Exchangers in Natural Convection Solar Domestic Hot Water Systems by :

Download or read book Thermal Modelling of Plate Heat Exchangers in Natural Convection Solar Domestic Hot Water Systems written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Solar Energy Update

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ISBN 13 :
Total Pages : 680 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Solar Energy Update by :

Download or read book Solar Energy Update written by and published by . This book was released on 1984 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt: