1.绪言两效溴化锂吸收式制冷机通常使用8公斤/厘米~2表压(785千帕)的蒸汽作为热源。然而,工厂中常有3～4公斤/厘米~2表压(294～392)的蒸汽,要求用这种低压蒸汽作为两效机热源的地方越来越多。和以往把这种低压蒸汽节流到1公斤/厘米~2表压(98千帕),然后再用于单效机的方式相比,用于两效机可使能源 1. INTRODUCTION Two-effect lithium bromide absorption chillers typically use steam of 8 kg / cm 2 to 2 g / 785 kPa as heat source. However, there are often 3 ~ 4 kg / cm ~ 2 gauge (294 ~ 392) steam in the factory, requiring more and more places to use this low-pressure steam as the heat source of two-effect machine. Compared with the previous method of throttling this low-pressure steam to 1 kg / cm ~ 2 Gage (98 kPa) and then using it in a single-effect machine, the two-effect machine can use energy