在过去几年中，大型建筑的空调成本大幅上升，由于建造新电厂的成本较高，预计这一趋势将继续下去。新开发的高效吸收式制冷机利用天然气，产生余热或蒸汽作为能源，现在与电动离心式制冷机竞争，以降低业主的能源成本。这些机组的性能系数高达1.21，而两级蒸汽机仅消耗9。 满负荷运行时，每吨小时9磅蒸汽。单位:I-PCITION:研讨会，ASHRAE交易，1985年，第91卷，pt。你好，檀香山2B

Air conditioning costs for large buildings have risen substantially over the past several years and are expected to continue this trend as a result of the high cost of constructing new electric plants. Newly developed, high-efficiency absorption chillers, which utilize natural gas, generating exhaust heat or steam as an energy source, now compete with electric centrifugal chillers to reduce owner's energy costs. The coefficient of performance for these units rates as high as 1.21 for the two-stage steam machine which consumes only 9.9 pounds of steam per ton-hour of operation at full load.Units: I-P