DEVELOPMENT OF A HYBRID TYPE HEAT PUMP SYSTEM FOR GREENHOUSE HEATING
To reduce fuel consumption in a greenhouse, a hybrid type heat pump system using geothermal and water source heat was developed. This system consists of four following parts: water tank heat exchanger, heat pump, fan coil unit and heat storage unit. The working performance test of the developed system under field conditions was carried out successfully. Result of field test showed that average coefficient of performance(COP) in heating was 3.4 and heating cost was reduced to about 91% when compared with the fuel consumption of the conventional hot air heater for 2 months in winter season. According to the test results of this study, this heating system enabled to save a large amount of the cost of fuel.
Jong Gil Jeon, , Yee Paek, , Ill Hwan Cho, , Hyung Kwon Kim, , Namkyu Yun, and Dong Geon Lee, (2014). DEVELOPMENT OF A HYBRID TYPE HEAT PUMP SYSTEM FOR GREENHOUSE HEATING. Acta Hortic. 1037, 249-254
hybrid heating system, coefficient of performance(COP), heat pump