Analysis of Energy Recovery Potential of Cascade System

• Main Authors: Yu-Hua Chang, 張育樺
• Other Authors: Yu-Lieh Wu
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/4aw6k7

碩士 === 國立勤益科技大學 === 冷凍空調系 === 106 === Today's cryogenic systems usually use cascads systems. The research direction is mostly to match different refrigerants, or to add reservoirs, change control logic, and always require two sets of power supply. In this study, the high-temperature compressor with a fixed compression ratio was used to eject the air turbine, and after the gas turbine was driven, the kinetic energy generated by the gas turbine was used to drive the belt pulley and the inverter motor, which in turn promoted the low-temperature side compressor, thereby achieving high energy efficiency. And through PID control can accurately control the temperature. In this research,using two different methoos for measuring the power whitch made by turbine,both of pushing force for turbine working are using Nitrogen and squeezing refrigerant from compressor respatively. The Nitrogen experimental group are opening exhaust and go through the buffer-tank before atmosphere,and consult the performance of market-saling compressor,to know how much power cost for reaching this mount of air exhaust.Comparing with the literature of experimental data,the results show the Nitrogen experimental group cost the power 47.6kW,recycle power 2.67kW at the pressure 8kg/cm2,and the compressor experiment group cost the power 2kW,recycle 1.45kW at the pressure 7.9 kg/cm2,proving the possibility of energy recycling.