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http://dx.doi.org/10.17664/ksgee.2016.12.4.027

Study on the Performance of a Cascade Heat Pump with Two-stage Water Heating Process  

Jang, Hanbyeoul (Graduate School of Mechanical Engineering, Hanbant National University)
Choi, Jong Min (Department of Mechanical Engineering, Hanbant National University)
Publication Information
Journal of the Korean Society for Geothermal and Hydrothermal Energy / v.12, no.4, 2016 , pp. 27-32 More about this Journal
Abstract
It is estimated that only heating and cooling take about one third of the total energy consumption worldwide. However, the conventional heating and cooling systems have low efficiencies. Also, boilers and electric heaters that are mostly used to generate both domestic and industrial hot water are inefficient and high energy consumers. For this reason, cascade heat pumps which are known to be very energy efficient and have less environmental impact are being promoted to replace conventional heating, cooling and hot water systems. In this study, a newly designed cascade heat pump by two-stage water heating method has been experimentally investigated. By adopting the auxiliary heat exchanger, the performance of the system was increased. The performance enhancement rate of the system could be maximized by adjusting the low stage compressor speed rather than the high stage compressor speed. The performance of the system with the auxiliary heat exchanger was enhanced by 16.5%.
Keywords
Cascade heat pump; High temperature; COP; Heating capacity;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 Stene, J., 2007. Integrated $CO_2$ heat pump systems for space heating and hot water heating in low-energy houses and passive houses. International Energy Agency (IEA) Heat Pump Programme, Workshop in Kyoto, Japan.
2 Aikins, K. A., Lee, S., and Choi, J. M., 2013, Technology review of two-stage vapor compression heat pump system, International Journal of Air-Conditioning and Refrigeration, Vol. 21 (133002), pp. 1-14.
3 Matsuoka, F. and Nagatomo, H., 1988, Dynamic response and electrical control for the air conditioner, Transaction of the JAR, Vol. 5, pp. 43-54.
4 Fujita, Y., Kubo, T., and Suma, S., 1992, Multi air conditioner with two indoor units, Refrigeration, Vol. 67, pp. 171-176.
5 Bhattacharyya, S., Mukhopadhyay, S., Kumar, A., Khurana, R. K., and Sarkar, J., 2005, Optimization of a $CO_2-C_3H_8$ cascade system for refrigeration and heating, International Journal of Refrigeration, Vol. 28, pp. 1284-1292.   DOI
6 Kim, D. H., Park, H. S., and Kim, M. S., 2012, Characteristics of R134a/R410a cascade heat pump and optimization, International Refrigeration and Air Conditioning Conference, Purdue 2425, pp. 1-7.
7 Lee, T. S., Liu, C. H., and Chen, T. W., 2006, Thermodynamic analysis of optimal condensing temperatures of cascade-condenser in $CO_2/NH_3$ cascade refrigeration systems, International Journal of Refrigeration, Vol. 29, pp. 1100-1108.   DOI
8 Agnew, B. and Ameli, S. M., 2004, A finite time analysis of a cascade refrigeration system using alternative refrigerants, Applied Thermal Engineering, Vol. 24, pp. 2557-2565.   DOI
9 ISO, 1998, Water-source heat pumps-Testing and rating for performance; Part 2: Water-to-water and brine-towater heat pumps, International Standard ISO 13256-2.
10 Chua, K. J., Chou, S. K., and Yang, W. M., 2010. Advances in heat pump systems: A review. Applied Energy, Vol. 87, pp. 3611-3624.   DOI
11 Heo, J., Jeong, M. W., Baek, C., and Kim, Y., 2011. Comparison of the heating performance of air-source heat pumps using various types of refrigerant injection. International Journal of Refrigeration, Vol. 34, pp. 444-453.   DOI
12 Stene, J., 2005. Residential $CO_2$ heat pump system for combined space heating and hot water heating. International Journal of Refrigeration Vol. 28, pp. 1259-1265.   DOI