中央电厂热回收系统的使用虽然不是什么新鲜事，但正在成为一种越来越流行的节能手段。随着能源成本持续上升，再加上能源短缺，它有望在未来几年更受欢迎。除此之外，ASHRAE标准90-75强烈鼓励使用热回收，前提是回收过程中消耗的新能源少于回收量。更具体地说，ASHRAE标准90-75不鼓励同时使用加热和冷却系统，除非回收的能量用于重新加热或混合。相反，只要在再热或混合过程中消耗的能量是回收的能量，就可以使用终端再热或多区等系统。设计热回收系统的一种比较流行的方法是建造带有两个独立水回路的冷水机组的水冷式冷凝器。 一个回路在建筑物的冷却循环期间向冷却塔排热，另一个冷凝器回路在建筑物的加热循环期间向加热回路排热，加热回路通常为变温定容系统或翅片管辐射系统的盘管提供热量。然而，冷凝器加热管束的可用温度较低，通常排除了将回收的能量与辐射产品一起直接用于处理皮肤热负荷的可能性，除非在通过翅片管辐射系统循环之前向冷凝器水提供补充热量。从凝汽器管束排出的热量也可用于常规末端再热系统或变风量再热系统中盘管的再热能量，或用于加热建筑物的生活热水。 因此，你可以看到，热回收的使用实际上没有地域限制。热回收应用的酸性测试是，我是否有一个热源，我是否有一个在时间上合理一致的地方使用它。引文:研讨会，ASHRAE交易，第83卷，第一部分，伊利诺伊州芝加哥

The use of central plant heat recovery systems, although not new, are becoming an increasingly popular means of conserving energy. And with the cost of energy continuing to rise coupled with energy shortages, it promises to be even more popular in the years to come.Beyond this ASHRAE Standard 90-75 strongly encourages the use of heat recovery provided that the new energy expended in the recovery process is less than the amount recovered. More specifically, ASHRAE Standard 90-75 discourages the use of simultaneous heating and cooling systems unless recovered energy is utilized for reheating or mixing.Conversely, systems such as terminal reheat or multizone may be utilized as long as the energy expended in reheating or mixing is recovered energy.One of the more popular ways to design heat recovery systems is to build the water cooled condenser of a water chiller with two separate water circuits. One circuit rejects heat to the cooling tower during the cooling cycle of the building and the other circuit of the condenser on the heating cycle of the building rejects heat to the heating loop usually feeding the coils of a variable temperature constant volume system or, in some cases, a fin tube radiation system.However, the lower temperature levels available off of the heating bundle of the condenser usually rule out the direct use of this recovered energy with radiation products to handle skin heating loads unless supplemental heat is provided to the condenser water prior to circulation through the fin tube radiation system.The heat rejected from the condenser bundle may also be used in the form of reheat energy for coils in conventional terminal reheat systems or variable air volume reheat systems or it may be used to heat domestic hot water for buildings.Because of this, you can see that the use of heat recovery really has no geographical limitations. The acid test for heat recovery application is do I have a source of heat and do I have a place to use it which are reasonably coincident in time.