A frost-less heat pump


Describes the development of a domestic frost-less heat pump which is achieved by assigning a moderate amount of heat to the refrigerant stream in the accumulator; the evaporator coil temperature can be raised by several degrees.  This concept can be used to retard frost accumulation on the outdoor coil of the heat pump and keep the coil clean.  Also discussed is a new defrosting technology that does not rely on heat taken from the conditioned space of the house by adding heat to the liquid refrigerant in the accumulator.  Test data on several units showed that the frost-less concept and the new defrosting scheme worked as expected.

Primary Author(s): Chen F C., Domitrovic R E., V C Mei

Source: ASHRAE Trans., 2002, vol.108, part 1, paper number 4543, p452-459, 7 figs., 2 tabs., refs.

             BSRIA Abstract Doc 000103943 Abs 20022372

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