Cogeneration system and method for controlling the same
First Claim
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1. A cogeneration system comprising:
- an engine;
a generator connected to an output shaft of the engine to generate electricity;
a heat pump type air conditioner including a compressor, a directional valve, an indoor heat exchanger, an expansion device, and an outdoor heat exchanger;
a pre-heater to pre-heat outdoor air blown toward the outdoor heat exchanger during a heating operation of the heat pump type air conditioner;
an auxiliary evaporator to evaporate a refrigerant emerging from the outdoor heat exchanger during the heating operation of the heat pump type air conditioner; and
waste heat recovering means to transfer waste heat of the engine to at least one of the pre-heater and the auxiliary evaporator.
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Abstract
A cogeneration system including a pre-heater to pre-heat outdoor air blown toward the outdoor heat exchanger during a heating operation of a heat pump type air conditioner, an auxiliary evaporator to evaporate a refrigerant emerging from the outdoor heat exchanger during the heating operation of the heat pump type air conditioner, and waste heat recovering means to transfer waste heat of the engine to at least one of the pre-heater and the auxiliary evaporator. The cogeneration system exhibits a high energy efficiency.
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Citations
20 Claims
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1. A cogeneration system comprising:
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an engine; a generator connected to an output shaft of the engine to generate electricity; a heat pump type air conditioner including a compressor, a directional valve, an indoor heat exchanger, an expansion device, and an outdoor heat exchanger; a pre-heater to pre-heat outdoor air blown toward the outdoor heat exchanger during a heating operation of the heat pump type air conditioner; an auxiliary evaporator to evaporate a refrigerant emerging from the outdoor heat exchanger during the heating operation of the heat pump type air conditioner; and waste heat recovering means to transfer waste heat of the engine to at least one of the pre-heater and the auxiliary evaporator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A cogeneration system comprising:
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an engine; a generator connected to an output shaft of the engine to generate electricity; a heat pump type air conditioner including a compressor, a directional valve, an indoor heat exchanger, an expansion device, and an outdoor heat exchanger; a pre-heater to pre-heat outdoor air blown toward the outdoor heat exchanger during a heating operation of the heat pump type air conditioner; an auxiliary evaporator to evaporate a refrigerant emerging from the outdoor heat exchanger during the heating operation of the heat pump type air conditioner; and waste heat recovering means to transfer waste heat of the engine to at least one of the pre-heater and the auxiliary evaporator while controlling the amount of the transferred heat in accordance with a frosting condition of the outdoor heat exchanger. - View Dependent Claims (15, 16, 17, 18)
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19. A method for controlling a cogeneration system, comprising:
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a temperature measuring step of measuring an outdoor temperature or a temperature of an outdoor heat exchanger included in a heat pump type air conditioner; and a waste heat controlling step comprising steps of supplying waste heat of an engine to a pre-heater adapted to pre-heat air blown to the outdoor heat exchanger when the heat pump type air conditioner operates in a heating mode, and the temperature measured in the temperature measuring step is in a heavily frosting temperature range, supplying the waste heat of the engine to a compressor suction line heater adapted to heat a suction line of a compressor included in the heat pump type air conditioner when the heat pump type air conditioner operates in the heating mode, and the temperature measured in the temperature measuring step is in a non-frosting temperature range, and supplying the waste heat of the engine to both the pre-heater and the compressor suction line heater when the heat pump type air conditioner operates in the heating mode, and the temperature measured in the temperature measuring step is in a lightly frosting temperature range. - View Dependent Claims (20)
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Specification