Study on non-Freon air cooling system using water refrigerant

A. Sugawara, S. Nakamikawa, M. Kageyama, S. Yamazaki, N. Abe, T. Itou, A. Tsurumaki and K. Kawasaki
Niigata University, JP

Keywords:

Air Cooling System, Water, Vacuum pump, Temperature, COP

Abstract:

This paper aims for construction of a small, clean air cooling system using a water refrigerant and examines it experimentally. We offer a basic report for realization of the non-Freon air-cooling system using only water as a refrigerant. An experimental device consists of two groups, the first stage is composed a vacuum pump and a vacuum container of about 60 liters in volume, and the second stage has two heat exchangers (the one is heat load) and a water circulation pumps. The temperature characteristics of each place are measured by thermocouples. An air-conditioner indoor unit or a heater for as heat load was used; the air conditioning measurement and the energy were measured, respectively. Consequently, in air-cooling system used only water refrigerant, the ability to cool a room air enough was provided. The development of a new vacuum pump which can exhaust a large amount of water vapor is introduced as an appendix.


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