| Energy crisis and environmental pollution are causing broad attention.Adjustment the energy composition,improving energy efficiency,using renewable energy,develop energy conservation and emission reduction strategies have become the only way of social development in our country.Geothermal energy carries the advantages of enormous energy,stable supply,geographically ubiquitous,and cleanness in all kinds of renewable energy resources,which has attracted more attention to its study.Soil source heat pump takes soil as heat and cold source,and it is used to heat or cool buildings through efficient heat pump units.Energy storage air conditioning system(ice storage,water storage)can achieve the purpose of transferring power load during peak load by means of electricity adjustment.Both of them have been widely used because of their obvious advantages.However,there are some drawbacks to running them separately.Therefore,it is considered to combine the two technologies to achieve the purpose of complementary advantages through reasonable design.In this paper,the characteristics of soil source heat pump,ice storage,water storage and their combined system are analyzed.The soil source heat pump coupled energy storage air conditioning system not only has the characteristics of providing cold/heat source,energy saving and environmental protection,balancing grid load,transferring peak power load,etc.,but also has the advantages of wide range of technical application,good economic benefits,high performance coefficient of heat pump,and reducing the installed capacity of heat pump.On this basis,the coupled soil source heat pump and energy storage system was applied to an office building in Beijing.The office building was modeled and analyzed by using the dynamic load simulation software DeST-C,and the annual cooling and heating load of the building was calculated.The building has a maximum cooling load of 2930 kW and a maximum heat load of 2204 kW.The system working process and mode of the combined operation of the soil source heat pump,water storage and ice storage are determined,and then the system equipment are designed and selected.Two soil source heat pump units with refrigerating capacity of 1181 kW and heat generation capacity of 1349 kW were determined to be adopted.A two-condition electric cooling water unit with refrigerating capacity of 791 kW and ice generation capacity of 524 kW was selected And through the design of water storage tank,ice storage tank and other equipment,so that the system can achieve the purpose of combined energy supply,cost saving. |
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