To build a further effective heat recovery system by solving the prob lem that a coolant forced circulation system heat recovery system to recover heat in exhaust gas from a production device requires a conveyance power cost needed so that this system has disadvantage in terms of energy saving and a conventional natural circulation type heat recovery system is constituted only for the purpose of recovering heat, and is not provided with air cleaning and other functions required by production factory or the like.
In the coolant natural circulation type heat recovery system, a heat exchange coil unit 3 (4) is coated with a photo-catalyst and the heat recovery system in a supply exhaust system at a production factory that a means 12 for daylighting to a heat exchange coil unit is constituted is proposed. By providing a heat exchange coil unit with a spray water distribution means 8, a need for its cleaning is automatically performed and cleaning at the time of maintenance is eliminated.
FUKAO HITOSHI
ITO HIROSHI
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