시설원예용 히트펌프 시스템의 성능특성에 관한 해석적 연구

Abstract

The facility house protects plants from the effects of the natural environment and is used for growing plants. It is because of the greenhouse effects that such facility houses can be operated. The greenhouse effect is short-wavelength solar radiation that can pass through the transparent roof and is absorbed by objects inside the greenhouse this study application of solar energy to the greenhouse is renewable energy research and development in order to save energy and mass balance theory. Renewable energy systems have received considerable attention as a sustainable technology in the building sector. Specifically, the ground source heat pump and air source heat pump for heating and cooling the building is increasing rapidly, and the combination with photovoltaic systems and heat pump systems provides with energy saving system and environmental benefits. The simulated system is installed at a length of 10m, width 5.4m, height 4.6m greenhouse located in Jeju national university of Jeju, South Korea. This experiment was carried out to collect data to validate the model. The results showed that the simulated air temperature inside a plastic greenhouse conformed well to the data. The study simulation program uses Gamma technology which is recognized worldwide as the industry standard for system simulations. The numerical models of condenser and evaporator were built for the effect of tube dimension and to analyzed fin-type on the heat transfer performance, which provides some reference for enhancement heat exchanger. The development of the heat pump energy efficiency standards is studied. The practical results of the simulation error were less than 25%. When operating the heat pump system in the program, the highest value of power consumption in the compressor simulation was 5.2 kW, and the average error was 5.8%. When the greenhouse air source heat pump system heats the outside air heat source, the round tube heat exchanger performed heat exchange as a condenser, and the experimental and analytic values for the heat quantity of the ring tube heat exchanger were compared. The average simulation and experiment COP error of heating the heat exchanger is 10%. The COP is having a lot of errors because of analytic error of flowmeter and compressor power consumption and the analytic error of heat exchanger heating amount is getting overlapped.