Probe On Natural Energy Complementary System For Heating And Cooling In Hot Summer And Cold Winter Region

Due to its large heat capacity, the soil has good energy storage capability, andthe average temperature of the deep soil is approximately equal to the annualaverage temperature. Based on the feature of the soil, natural energy complementarysystem for heating and cooling has been put forward in this paper. The system takescold from the soil in summer, at the same time puts heat to the soil, and in winter ittakes heat while storages cold. The system is a new heating and cooling systemwhich is energy-saving, high efficiency and environmentally friendly.Natural energy complementary system for heating and cooling does not useartificial heat and cold sources, but use the cold (heat) storage in soil as the cold(heat) sources, so the system has less energy consumption devices and can get alarger coefficient of performance. In hot summer and cold winter region, coolingload is approximately equal to heating load, and the cooling load is slightly largerthan the heating load. Natural energy complementary system for single smallbuilding in this region, can improve indoor thermal environment with smallerenergy consumption and less control. And the soil temperature field can maintainbalance, so the system has a higher saving significance.This paper use TRNSYS software simulating natural energy complementarysystem. Firstly this paper introduces the simulation software and simulationmodules, including ground heat exchanger module, buildings module and fan coilheat exchanger module. Then we selected a single small building in shanghaitownship and established a natural energy complementary system for this building.According to the first year’s and several years’ simulation results, we dynamicanalysis the system’s operating characteristics, average temperature of the soil andthe changes of the building’s indoor temperature, then we prove the system’slong-running reliability. Finally, based on the results of theoretical analysis, wegave the optimization of the system. After compared the economy of the naturalenergy complementary system for heating and cooling with ground source heatpump system, we found：at the same output of the two systems, natural energycomplementary system for heating and cooling is better than the ground source heatpump system, it also shows that in hot summer and cold winter region the naturalenergy complementary system for heating and cooling is feasible.This paper provided theoretical supports for natural energy complementarysystem for heating and cooling applying for engineering applications in hot summerand cold winter region.