Optimization And Application Study Of A Heating System With Regenerative Air-source Heat Pump In Severe Cold And Cold Area

Air source heat pump is widely used as an efficient and clean heating method to replace bulk coal.This paper proposes a regenerative air source heat pump heating system by combining the improvement of electric heating efficiency with the absorption of surplus electric energy in winter,and carries out in-depth research on the optimal integration and operation of this kind of system in severe cold and cold regions.First,according to the off design characteristics of each link of the system,the mathematical model is established,and the whole system is simulated by the transient simulation software TRNSYS.In addition,the energy consumption simulation software De ST is used to establish the analysis model of building heat load in typical areas,which provides the necessary theoretical analysis tools for the integration,optimization and operation of the system.In addition,TRNSYS calls Hooke Jeeves optimization algorithm to optimize the key configuration parameters such as air source heat pump heating power,electric boiler heating power and heat storage tank volume with the goal of minimizing the total cost of unit heat supply.The net present value and dynamic payback period are introduced to realize the economic evaluation of the optimization system.Finally,taking a typical building in Urumqi as an example,the optimal configuration and operation of regenerative air source heat pump heating system are studied.The influence of sensitive factors on the system economy is analyzed to verify the strong antirisk ability of the system,and the economy of the system is compared with that of conventional air source heat pump and regenerative electric boiler heating system.Aiming at the application in severe cold and cold regions,the K-means clustering analysis method is used to divide the applicable climate regions of the system,and the typical cities in each region are determined.Using the optimization research results of this paper,the operation performance and economy of regenerative air source heat pump,conventional air source heat pump and regenerative electric boiler heating system in different climate regions are analyzed.It is verified that the regenerative air source heat pump heating system has better applicability.