Hybrid Energy Heating And Cooling System On A Low Energy Consumption Building In Severe Cold Region

Heating load is far greater than the cooling load in heating dominated buildings.There is a seasonal mismatch between solar radiation availability in summer andheating requirement in winter that annual storage of solar energy is a way tocompensate this mismatch. The combination of renewable energy and groundsource heat pump technology in the construction field becomes increasinglyattracting. The utilization of hybrid energy resources provides us with a new idea tosolve energy as well as environmental problems. This paper presents a HybridEnergy of Heating and Cooling (HEHC) system using a variety of complementaryenergy (solar energy and wind energy) to generate power for circulating pumps inSolar-Ground Coupled Source Heat Pump (SGCSHP) system, so that the twosystems can work properly with less or with grid power.The document aims at stand alone residential buildings in severe cold regionswhich can meet75%energy efficiency. The paper discusses the energy consumptionof the building when the room reaches basic temperature. Moreover, sizingoptimization and analysis are conducted.Detailed SGCSHP system design method and control strategies are introducedat the beginning of this paper. TRNSYS, a simulation software tool, was used tomodel the annual operation performance of the proposed SGCSHP system. The heatpump’s running characteristics and the thermal balance of underground storage ofthe low-energy building are discussed when the room meets the setting temperatures,so that the feasibility of the system used in the severer cold regions can be verified.Based on the power consumption of circulating pumps in SGCSHP system, thereliability and economy of the PV/Wind Hybrid Power (P/WHP) system whichprovides power for pumps are studied by simulation. Solar and wind availabilitiesin Harbin have been evaluated as well as their compensation characters. What’smore, system configurations are optimized suitably, and power generationperformance was analyzed.Due to the problem of soil temperature reduction caused by thermal imbalances between the amounts of heat extracted from and injected to the groundas ground source heat pump used in severe cold regions, SGCSHP system withseasonal heat storage is proposed to apply to the region. The feasibility of the ideais verified through simulation studies. Also, it provides a way to solve electricitysupply in remote areas by using small scale P/WHP system.This work was supported by the Ministy of Science and Technology of Chinavia the12thFive-Year Supporting Plan of the National Science and TechnologySupporting Project,“Research on green technology of existing residential buildingsreconstruction and demonstration projects in typical climate (No.2012BAJ06B02)”.