Experimental Study on Effect of CO₂ Heat Pump Evaporator on Frosting Condition

Abstract:

The theoretical analysis of frost formation had been made. The wind speed, temperature and relative humidity etc. had different effects respectively. A single heating was studied through the experiment. In different outdoor conditions, experimental data showed evaporator frost at the environment temperature of 10 °C, environment relative humidity was 70%. Comparing the experimental data, it is concluded that temperature of evaporator’s outlet is increasing with the outlet temperature. The refrigerant evaporation temperature and COP under different conditions has been tested. The relation of evaporation pressure and environmental temperature under different evaporation temperature had been concluded. According to the experiment, a defrost measure of this experiment equipment had been proposed.

• Periodical: Applied Mechanics and Materials (Volume 694)
• Pages: 218-221
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.694.218
• Online since: November 2014
• Authors: Si Qian Zhu*, Jing Lv, Hui Xia Lu, Dong Dong Shi, Feng Xu
• Keywords: CO₂ Heat Pump, Experimental Study, Frosting Condition of Evaporator, Thermal Engineering

References

[1] Y. Lv: Air source heat pump working condition of frosting performance analysis and experimental research [D], Hunan Province: Hunan University, 2008, 13-15.

[2] M. Luo: Building Energy & Environment, 2002, (6): 15-17, in Chinese.

[3] A. Bensafi, S. Borg, D. Parent. Cyrano: International Journal of Refrigeration, 1997, 20(3): 218-228.

[4] S.Y. Liang, T.N. Wong, G.K. Nathan: International Journal of Refrigeration, 2001, 24(8): 823-833.

[5] J. Liu, W.J. Wei, G.L. Ding: International Journal of Refrigeration, 2004, 27(8): 965-973.

[6] Y. Yao: Air source heat pump hot water unit simulation and analysis of frost in winter conditions [D], Harbin institute of technology, 2002, 28-105, in Chinese.