Condensation heat recovery system has been developed to save energy carriers (like natural gas etc.) normally used to supply outlet with hot water. Energy saving is reached due to a possibility does not replace usual water heating devices, but supplement them and lets significantly reduce running costs. Operational characteristics of the system depends both from season changes of water and air temperatures and water withdrawal by the user.
Structure and operation of water heating system
Between compressor and air condenser of refrigeration plant there is a lamellar heat exchanger (HE), where heat produced by hot compressed refrigerant is recovered and use for water heating. Whet users withdraw hot water from accumulating tank (1), this tank is refilled with cold water from water mains. Circulation pump (2) delivers water from the lower part of the tank to HE. There water is being heated with hot refrigerant. Hot water is withdrawn by users, then replaced with cold one and so on. In this way we can provide continuous circulation of the water inside of closed circuit of HE and accumulating tank.
Circulation pump (3) turns not used water back to accumulating tank. As far as heat exchanger HE is connected in sequence with air condenser, excessive heat is taken away with refrigerant flow to air condenser and then outside. That’s why the system has property of self-adjustment and does not require special adjusting devices.
In case of necessity water, heated in the heat exchanger HE, can be additionally heated by regular boiler.
