氨水喷射-吸收式制冷循环的研究

Study on ammonia ejector-absorption refrigeration cycle

对喷射增压的氨水吸收式制冷循环进行分析和热力计算 ,分别与一般的氨水吸收式循环相比 ,前者在相同的热源温度下 ,获取的最低蒸发温度能够降低 1 0℃左右 ,单级喷射 -吸收系统的 COP一直保持在 0 .3左右 ,双级喷射 -吸收系统的 COP在 0 .2左右。虽然在较高的蒸发温度段该制冷循环的性能系数略有降低 ,但是它能够利用现实中许多低品位的热源获取更低的蒸发温度。

Cycle analysis and thermal calculation were presented for ammonia ejector-absorption refrigeration cycle. Compared with the traditional ammonia absorption refrigeration cycle, the lowest evaporation temperature can be reduced by about 10 ℃ with the same heat source temperature. The COP is normally around the value of 0.3 and 0.2 for single-stage and double-stage ejector-absorption cycle respectively. The performance coefficient might drop a little during the range of higher evaporating temperature, but it shows that lower evaporation temperature can be obtained by low temperature hear resource.