本文描述并讨论了几种类型的空气-空气能量回收装置的原理、优缺点，包括开式和闭式绕流系统、热管换热器、热轮和板式换热器。重点放在加热和冷却设备的潜在节能和燃料成本，通过回收废气中的能量，然后将其丢弃。结果表明，每年可节省23%的能源，在加热和冷却设备的尺寸上甚至可以节省更多的能源。正如预期的那样，当需要大量的外部空气进行通风时，可以实现最大的节约。引文:ASHRAE Transactions，第87卷，第1部分，伊利诺伊州芝加哥

This paper describes and discusses the principles, advantages, and disadvantages of several types of air-to-air energy recovery devices including the open and closed run-around systems, the heat pipe exchanger, the thermal wheel, and the plate exchanger. Emphasis is placed on the potential energy savings in heating and cooling equipment and fuel costs by recovering energy from exhaust air before it is thrown away. Results indicate annual energy savings up to 23% with even larger savings in the size of the heating and cooling equipment. As expected, greatest savings occur when large amounts of outside air are required for ventilation.