The Study Of The Match Of Solar-ground Source Heat Pump System In Dalian

Since the exacerbation of the environment and the increasing concerns over a global energy crisis, developing and exploiting reusable energy and contamination-free energy have been broadly focused. Solar energy-ground source heat pump system is a highly energy efficient and environment friendly reusable energy system. Collaborative of solar energy and ground source heat pump has unique strengths that are complements, which make up for a deficiency in insufficiency of single heat resource and greatly increasing the performance of the heating system. One reason being that earth can help store thermal heat, has sustainability and stability effects. Second point being that due to solar energy allows under earth heat exchanger to work simultaneously; it helps to restore earth temperature and stabilize heat pumps, which ensures heat pumps'steady operation.This article in the view of the solar-ground source heat pump heating characteristic, proposed 2 diverse operation strategies:room temperature control and water tank temperature control. In typical villa building for research object, In order to meet the building heat load as the goal, the solar-ground source heat pump heating system was set up in TRNSYS software. Through data collected by improved solar energy lab of the vacuum tube solar collector's mathematical model was tested in TRNSYS. Based on the simulation results analyzed and compared the two control strategy. The controlling strategy of using room temperature to control ground-source heat pump has the benefit of low energy consumption, which allows the maximum reduction of processing time. The strategy of using water tank to control ground-source heat pump has the benefit of higher flexibility of heat restoration adjustment range, which allows smaller system/model. According to the room temperature control which has lower power consumption, the collectors area, water tank volume, ground-source heat pump capacity to system influence degree were analyzed. Of all devices that represent only a small proportion of overall heating load, the most influence system COP is to adjust water tank volume. Of all devices that represent only a bigger proportion of overall heating load, the most influence system COP is to adjust collector area.In order to find the matching relation between main parts of solar-ground source heat pump system to better guide the system design and application. This article picked a representative construction that saves 65% of energy for simulation and analyzed construction load condition firstly. Based on fulfilling the heating supply requirement, combinations of possible outcomes by adopting room temperature control and water tank temperature control were simulated. Correlation curves regarding heat collector area, water tank volume and heat pump under two controlling methods were obtained. The formation of the curves and their effects on the selected system were analyzed. Based on the formation of the system, heating source was divided to be fixed source and variable source. The ultimate goal for selection of the system and controlling strategy was to obtain equilibrium of the two. The controlling strategy of using room temperature to control ground-source heat pump has the benefit of low energy consumption, which allows the maximum reduction of processing time. The strategy of using water tank to control ground-source heat pump has the benefit of higher flexibility of heat restoration adjustment range, which allows smaller system/model. In regards to selecting a heating system for an entire building compound, one needs to base on available area, initial investments and the COP to achieve. Once selected an component (whether it is the heat collector, ground-source heat pump or water tank), based on the formula suggested in this article, one can then calculate heat load, fixed heat volume and variable heat volume. After that, an operation strategy can be adopted; based on correlation curves discussed in this article, and then go onto select other components of the system.