| 摘要 |
An embodiment of the invention relates to a method for providing heat that comprises preheating an incoming air flow from outside an apparatus (210) in a first channel of a heat exchanger (240) by a flow in a second channel of the heat exchanger, transferring the flow from the second channel outside the apparatus through an exhaust channel (248a), providing heat by the preheated incoming air flow in a heat pump (250), and transferring in a transfer channel (270) a flue gas flow provided by a burner (222) to the second channel, the method further comprises receiving in the transfer channel a part of the exhausted flow from the exhaust channel and controlling a flow of the flue gas flow and the received part of the exhausted flow in the transfer channel so that moisture in the flue gas flow and the received part of the exhausted flow condenses on a surface of the second channel and reacts with flue gas particles of the flue gas flow when the flow of the flue gas flow and the received part of the exhausted flow interacts with the incoming air flow in the first channel increasing the preheating of the incoming air flow. |
