Study On Soil Source Heat Pump–Floor Radiant Heating And Cooling In Severe Cold Region

With the development of social economy,people become more and more high to the requirement of indoor comfort,indoor temperature directly affects the people's life and work,at the same time are also gradually strengthen the consciousness of energy conservation and environmental protection.Long cold region in winter,the outdoor temperature is below basic-10 ?,so the cold region load characteristic is heat load is large,and the summer load is small,the duration is short.Office buildings during the load characteristic is how to solve the cold region in winter heating and summer cooling in hot and cold imbalance problems become the focus of attention.Mostly using the cold region in winter heating boiler room central heating,such as form,causing a low energy efficiency,pollution of the environment.In recent years,the world's energy shortage,especially in China's large population,per capita energy is far lower than the world average level,so the effective development is not only beneficial to the environment friendly new energy technology,can very good save nonrenewable energy.As the new available in raw energy,ground source heat pump by the attention of the countries all over the world.In this paper,according to the geological conditions and climate characteristics of cold region in China,using the system in-depth study.In this paper,based on the seasonal heat storage of the soil,ground source heat pump system was put forward,the design of the floor cooling and heating.Transfer the heat in summer environment for storage in the soil,the winter by heat pump extracts heat from soil to the floor,indoor via the floor radiant heating,and the heat in summer will indoor floor in tropical soil to realize indoor cooling.Research mainly divided into the following steps: first,according to the office building maintenance structure characteristics,design the corresponding building model,and by using Trnsys software architecture and system model is established,the output load and system energy consumption,and compare the results,verify the accuracy of the model and the correctness of the results.Second experiment in the actual maximal,calculating and analyzing two winter heating period of energy consumption and COP,and a graph compared with Trnsys simulation results,verify that the software simulation and actual operation.Third,combined with the characteristics of the cold region climate soil source heat pump heating heat pump-floor radiant cooling with integrated research,analyzing the characteristics of the load,by setting the different unit type and number of buried pipes,study the soil average temperature and annual average COP,for the buried pipe per linear meter in selection and unit capacity selection of the optimal design of the heat.Finally from the perspective of comfort to investigate floor cooling heating applied to the comfort of office buildings,and analyses the summer cooling down harden dew problem,put forward the corresponding solutions.To promote the study of soil source heat pump-floor radiant heating system in cold region provide theoretical basis for the application.