Abstract
Air—to—air heat pumps have been widely used for space heating applications in locations with moderate ambient. temperatures. Since their introduction in early fifties, commercially available heat pumps have undergone significant design changes that have made them more reliable, and in some case, even competitive with conventional energy sources such as oil. For heating applications, the instantaneous coefficient of performance, COPH, generally ranges from 1.5 to 3.0 for typical residential unit, depending on the source (outdoor) and sink (indoor) temperatures. In recent years, water-to-water heat pumps have also been analyzed for year round domestic hot water (DHW) and industrial process heat (IPH) applications [1–2]. The COPH of these heat pumps can range from 2.5 to 6.0, depending on the source and sink temperatures. Both water and air source heat pumps operate on the same mechanical vapor compression cycle, and their use is currently limited to a sink temperature of 110°C or lower, primarily due to thermo-chemical instability of the refrigerant above this temperature limit.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
R.T. Duncan, and G.T. Van Zuiden, (1979), “Economic Viability of Solar-Assisted Industrial Heat Pump”, Solar Industrial Process Heat Conference Proceedings, SERI/TP-33–429, San Francisco, CA, 31-Nov. 2.
S.K. Chaturvedi, and L.M. Murphy, (1985), “Energy Conservation Potential of large Capacity Solar-Assisted Heat Pumps for Low Temperature IPH Applications”, Journal of Solar Energy Engineering, Vol. 107.
R.C. Bosio, and N.V. Suryanarayaha, (1975), “Solar Assisted Heat Pump System: A Parametric Study for Space Heating of a Characteristic House in Madison”, Wisconsin, “ASME Paper 75-WA/501–8.
T.L. Freeman, J.W. Mitchell, and T.E. Audit, (1978), “Performance of Combined Solar-Heart Pumps”, Simulation and Design of Solar Thermal Processes, Progress Report, U.S. Dept. of Energy.
C.D. Svard, J.W. Mitchell, and W.A. Backman, (1981), “Design Procedure and Application of Solar-Assisted Heat Pump Systems”, Journal of Solar Energy Engineering, Vol. 103.
S.A. Shah, T.H. Short, and R.P. Fynn, (1981), “A Solar Pond-Assisted Heat Pump for Greenhouses”, Solar Energy, Vol.26.
P.S pron, and E.R. Ambrose, (1955), “The Heat Pump and Solar Energy”, Proceedings of the World Symposium of Applied Solar Energy, Phoenix, Ariz.
J.L. Franklin, E.W. Saaski, and A. Yamagiwa, (1977), “A High Efficiency, Direct Expansion Solar Panel”, Proceedings of 1977 Flat-Plate Collector Conference, Orlando, Florida, pp. 187–195.
S.K. Chaturvedi, A.S. Roberts Jr, and V. Mei, (1979), “Solar Collector As Heat Pump Evaporator”, 14th Inter-society Energy Conversion Engineering Conference, Boston, Massachusetts.
S.K. Chaturvedi, Y.F. Chiang, and A.S. Roberts Jr., (1982), “Analysis of Two-Phase Solar Collectors with Application to Heat Pumps”, Journal of Solar Energy Engineering, Vol. 104.
R.G. Morgan, “Solar-Assisted Heat Pump”, Solar Energy, Vol. 28 No. 2, pp. 129–135.
S.K. Chaturvedi, and J.Y. Shen, (1984), “Thermal Performance of a Direct Expansion Solar-Assisted Heat Pump”, Solar Energy,. Vol. 33, No.2, pp. 155–162.
M.P.O’ Dell, J.W. Mitchell, and W.A. Beckman, (1984), “Solar Heat Pump System with Refrigerant-Filled Collectors”, Transactions of ASHRAE, Vol. 89, Part 1.
M.P.O’ Dell, J.W. Mitchell, and W.A. Beckman, (1984), “Design Method and Performance of Heat Pumps with Refrigerant Filled Solar Collectors”, J. of Solar Energy Engineering, Vol. 106, p. 159.
J. Matsuki, (1984), Private Communication, Sharp Corporation, Japan.
G.B. Wallis, One-Dimensional Two-Phase Flow, McGraw-Hill Book Company, New York.
F.M. White, Viscous Fluid Flow, McGraw-Hill Book Company, New York.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1987 D. Reidel Publishing Company
About this chapter
Cite this chapter
Chaturvedi, S.K. (1987). Thermodynamic Analysis of a Direct Expansion Solar-Assisted Heat Pump. In: Garg, H.P., Dayal, M., Furlan, G., Sayigh, A.A.M. (eds) Physics and Technology of Solar Energy. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3939-4_22
Download citation
DOI: https://doi.org/10.1007/978-94-009-3939-4_22
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-8247-1
Online ISBN: 978-94-009-3939-4
eBook Packages: Springer Book Archive