低GWP冷媒ターボ冷凍機用抽気装置の開発

抄録

A Low GWP refrigerant, R-1233zd(E), is low toxicity and non-flammable. And it's GWP value is approx. 1. The specific gas volume is much higher than R-134a, so that, it is not suitable for positive displacement chillers, but suitable for centrifugal chillers. Normal boiling point of R-1233ze(E) is 18.3°C, therefore the pressure in an evaporator of the chiller is lower than atmosphere pressure. In order to keep the performance of the chiller high, air contamination should be the lowest level. So we have developed a very simple air collection system for the centrifugal chiller using R-1233zd(E). In the air collection system, Peltier devices are equipped to condense refrigerant gas to make air concentration high. The performance of air collection system have been measured and evaluated.