Applicability Analysis Of New Solar Sewage Source Heat Pump In Net Zero Energy Consumption Residential Buildings

With the gradual promotion of the net zero energy consumption building,using its lower cooling and heating load and higher heat storage characteristics,this paper proposes a new household solar sewage source heat pump system,and explores the feasibility of combining the heat pump system with the net zero energy consumption building to ensure the annual domestic hot water and winter heating through the building body energy storage and clean energy utilization.This paper analyzes the influence of different system parameters on the system from the aspects of system performance,operation effect and renewable resource utilization rate,as well as the continuous operation effect of the system in different climate regions throughout the year,so as to explore the applicability of the system in the net zero energy consumption building.First of all,the heat load of the system is designed and calculated.Combined with the current situation of net zero energy consumption building load and the heat law of domestic hot water,the heat load of the net zero energy consumption building is determined.Then,the selection design and calculation of various system components are carried out,and the TRNSYS numerical simulation model is established,The accuracy and reliability of the calculation results of the model are ensured by step independence verification and experimental results verification.Secondly,by changing the different equipment parameters and operation parameters of the system,the influence of each parameter change on the system operation effect,system energy efficiency and renewable resource utilization rate is analyzed.The results show that the increase of solar collector area,evaporator and condenser heat exchange area can effectively improve the system energy efficiency,The increase of the angle between the solar collector and the ground is not conducive to improve the energy efficiency of the system.The flow rate of the solar side circulating pump should be selected in the appropriate range,which can play a better effect on the energy saving of the system.Then,the simulation calculation of the whole year continuous operation of the system is carried out,and the operation effect and system energy consumption of the system in heating season and non heating season are obtained,and then the energy saving,environmental protection and economy of the system applied in the simulation area are analyzed.The results show that the system used in Changchun District Heating and domestic hot water supply can ensure a good temperature range throughout the year,and the system energy efficiency can reach 3.68,which also has great advantages in energy saving and economy.Finally,the operation effect of the system in other climate regions is simulated,and the economic analysis is carried out.The results show that the system can maintain high system energy efficiency in given regions,and the system also has good economic advantages in Beijing,Shanghai,Xining and other regions.