| 摘要 |
<p>An air-conditioning plant, in which recovery of heat from outgoing extracted air takes place, comprises two ducts (1, 4) passing through a heat-recovering element (9). Each duct (1 and 4), in the form of a ventilating duct and an air supply duct, has a fan (7 and 8, respectively) arranged thereto, to maintain forced air flow in the ducts (1 and 4), each having at least one heat exchanger (10 and 13) arranged thereto. One heat exchanger (10) is arranged to the evaporator of the refrigerating machine, whereas the second heat exchanger (13) is arranged to the condenser of the refrigerating machine. The aim has been to allow cooling of the extracted air to a temperature lower than what has been possible with previously known solutions. This is realized by placing one heat exchanger (10), namely the one arranged to the evaporator of the refrigerating machine, in the ventilating duct (1) upstream of the heat-recovering element (9). Thereby a larger amount of the thermal energy may be drawn from the extracted air, and the degree of heat recovery in the air-conditioning plant can be optimized without an increase of the heat exchanging surface area.</p> |
