Experimental Study on Two-Stage Cascade Low Temperature Pre-Cooling Equipment
A two-stage cascade pre-cooling test bed was designed and set up to develop a -30°C /-60°C pre-cooling equipment. An internal heater exchanger and a condenser were set in low-temperature cycle. Theoretically the two stages can work stably at setting temperature and the low-temperature cycle can operate independently with aided starting of the high-temperature cycle. The experimental results indicate that the test bed can provide cooling capacity steadily at -46°C and -100°C respectively and the low-temperature cycle cannot operate alone for compressor overload protection. Based on the analysis, the possible reasons and detailed suggestions were put forward.
Bo Zhao, Yidu Zhang, Guanglin Wang, Hai Zhang, Jianbin Zhang and Feng Jiao
X. F. Liu et al., "Experimental Study on Two-Stage Cascade Low Temperature Pre-Cooling Equipment", Applied Mechanics and Materials, Vol. 42, pp. 322-325, 2011