有用的蒸发冷却取决于进入设备的空气的湿球温度，但很明显，间接蒸发冷却部件，再加上机械制冷部件，即使在该国设计湿球温度相对较高的地区，也为设计师提供了经济高效的舒适冷却设计解决方案。本文证明了间接蒸发冷却（在不向供应气流添加水分的布置中使用蒸发效应）可以与机械冷却串联使用，从而降低年度运行成本。引文:研讨会，ASHRAE交易，1985年，第91卷，pt。1B芝加哥

Useful evaporative cooling depends on the wet-bulb temperature of the air entering the equipment, but it is evident that indirect evaporative cooling components, coupled with mechanical refrigerating components, offer the designer a cost-effective design solution to comfort cooling even in areas of the country having relatively high design wet-bulb temperatures. This paper demonstrates that indirect evaporative cooling (where the evaporative effect is used in an arrangement that does not add moisture to the supply airstream) can be used in series with mechanical cooling in ways that result in lower annual operating costs.