Experimental Research on a Heat Pump Water Heater Using Low Pressure Steam as Heat Source

Abstract:

Heat recovery of low pressure steam in steam condenser of thermal power plant was attractive because of its great economy and environmental value. This paper reported the experimental investigation results on the application of a heat pump water heater (HPWH) using low pressure steam in steam condenser as heat source. The working principles and features of the prototype heat pump were introduced. The effects of various parameters, including water flow rate and inlet temperature of heat pump condenser were investigated. Influence of vacuum pump on HPWH was also discussed. Results show that performance of HPWH is governed strongly by the change of water flow rate and inlet water temperature of heat pump condenser and vacuum pump. Maximum outlet water temperature of the test HPWH is 65°C and the maximum coefficient of performance (COP) is 4.5.

• Periodical: Advanced Materials Research (Volumes 805-806)
• Pages: 637-644
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.805-806.637
• Online since: September 2013
• Authors: Jun Fan, Feng Zhong Sun, Ming Gao
• Keywords: Coefficient of Performance (COP), Heat Pump Water Heater (HPWH), Heat Recovery, Low Pressure Steam, Thermal Power Plant

References

[1] Chua KJ, Chou SK, Yang WM, Advances in heat pump systems: a review，J. Appl. Energ. 87 （2010）3611-3624.

DOI: 10.1016/j.apenergy.2010.06.014

[2] N.C. Baek, U.C. Shin, J.H. Yoon, A study on the design and analysis of a heat pump heating system using wastewater as a heat source, J. Sol. Energy 78 (2005) 427-440.

DOI: 10.1016/j.solener.2004.07.009

[3] Gu ZL, Qiu J, Li Y, Cai GG, Heat pump system utilizing produced water in oil fields, J. Appl. Therm. Eng. 23 (2003) 1959-(1970).

DOI: 10.1016/s1359-4311(03)00143-1

[4] Srinivas Garimella, Low-grade waste heat recovery for simultaneous chilled and hot water generation, J. Appl. Therm. Eng. 42 (2012) 191-198.

DOI: 10.1016/j.applthermaleng.2011.07.051

[5] Youliang Chen , Fengzhong Sun , Hongguo Wang , Nasi Mu, Ming Gao, Experimental research of the cross walls effect on the thermal performance of wet cooling towers under crosswind conditions, J. Appl. Therm. Eng. 31 (2011) 4007-4013.

DOI: 10.1016/j.applthermaleng.2011.08.001

[6] Ran Chunyu, LI Yang, WANG Chunqing, On heating with heat pump technology using circulating water of power plants as heat source, Chinese Journal of Changchun Normal University(Natural Science)28. (2009)27-29.

[7] Ji Jie, Liu Keliang, Pei Gang, He Wei. Practicability of district heating using heat pumps with circulating water of power plant as heat source, Chinese Journal of HV&AC. 35 (2005)104-107.

[8] Hiroml Hasegawa et al., Development of two-stage compression and cascade heating heat pump system for hot water supply, ASHRAE Tran. 102 (1996) 248-256.

[9] Jianlin Yu, Zong Xu, Gaolei Tian, A thermodynamic analysis of a transcritical cycle with refrigerant mixture R32/R290 for a small heat pump water heater, Energ. Buildings. 42 (2010) 2431-2436.

DOI: 10.1016/j.enbuild.2010.08.016

[10] Shouguo Wang, Hanfei Tuo , Feng Cao , Ziwen Xing, Experimental investigation on air-source transcritical CO2 heat pump water heater system at a fixed water inlet temperature, Int. J. Refrig. 36 (2013) 701-716.

DOI: 10.1016/j.ijrefrig.2012.10.011

[11] B. Palm, Hydrocarbons as refrigerants in small heat pump and refrigeration systems-a review, Int. J. Refrig. 31 (2008) 552-563.

DOI: 10.1016/j.ijrefrig.2007.11.016

[12] Minsung Kim, Min Soo Kim, Jae Dong Chung, Transient thermal behavior of a water heater system driven by a heater pump, Int. J. Refrig. 27 (2004) 415-421.

DOI: 10.1016/j.ijrefrig.2003.11.009

[13] Pei Gang, Li Guiqiang, Ji Jie, Comparative study of air-source heat pump water heater systems using the instantaneous heating and cyclic heating modes, J. Appl. Therm. Eng. 31 (2011) 342-347.

DOI: 10.1016/j.applthermaleng.2010.09.020