Study On Applicability Of Air Source Heat Pump Heating In Residential Buildings In Shenyang Areas

The air source heat pump heating system applies energy-saving and environmentally-friendly heat pump technology to the heating system,which can effectively improve the heating efficiency.The system is energy-saving and environmentally friendly,and the heating efficiency is high.However,when the outdoor temperature is low,the air source heat pump unit will have insufficient heating capacity.Even the problem of frosting on the unit,so the application of air source heat pump heating system in Shenyang is a good research topic.The air source heat pump heating system can be roughly divided into two types based on the heating end,one is an air source heat pump low temperature hot water floor radiant heating system,and the other is an air source heat pump hot air system.This paper selects the weather parameters of the cold city-Shenyang as the simulated weather parameters,establishes the room model,and establishes two heating system models with TRNSYS software,sets the same indoor heating temperature conditions,simulates the operation of two systems,and uses these two systems separately.The indoor temperature of the room,the PMV-PPD indicator,the unit's heat supply,the cop value,and the power consumption are used to compare the advantages and disadvantages of the two heating systems.Finally,according to the simulation results,the heating system that best meets the actual requirements,that is,the first system mentioned above,is optimized and researched.In order to propose the possibility of energy saving under the premise of meeting the indoor heating standard,the system is intermittently operated.The policy determines that the intermittent heating operation time is stopped from 5:00 to 8:00,and the rest of the time is normal operation.Compared with the previous parameters,it is found that the indoor thermal comfort still meets a high standard,and the actual heat supply is slightly reduced but the system The cop value increased slightly,and the consumption decreased by 16.57 kWh,about 3.1%,which achieved the purpose of energy saving,which proved that our proposed scheme is feasible.At the same time,in order to solve the problem of low efficiency and even frosting of the air source heat pump unit during low temperature operation,the outdoor air dew point temperature of Shenyang is calculated to be-16.6?,and the reasonable running time of the unit is judged to be 10:00?20:00.The indoor heating standard can still be met,and the heat storage performance of the unit can be improved.By comparing with the previous parameters.the actual heat supply of the unit with improved heat storage capacity,the cop value of the unit,and even the room temperature are enhanced.Comfort is almost unchanged,still meets high standards,although the energy consumption increased by 3.2%,but the increase is very small,acceptable,which proves that our improved solution is feasible and achieves the original purpose.