The effects of liquid-suction heat exchanger on the performance of a split air conditioner using R22 under various evaporating temperature

摘要

An experimental study on the effect of the liquid-suction heat exchanger on the performance of a split air conditioner using R22 has been conducted. The air conditioning machine has been tested under various evaporating temperature, from -5C to +4°C. The test showed that the use of LSHX increases the superheat, discharge temperature, and discharge pressure. It is also shown that the LSHX has no significant effect on the cooling capacity and increases the work of compression, resulting in the lower COP and EER. It signifies that the LSHX is only useful for the safe operation of compressor rather than for improving the cooling performance.