Case study on water source heat pump system during heating season in severe cold regions
CHENG Mingyuan
XIE Yankui
Abstract：Aiming at the problems of high energy consumption and large carbon emissions for building heating in severe cold regions,taking a large office building in Shenyang City as the research object,a water source heat pump system model is constructed based on TRNSYS dynamic simulation technology.Combined with heat recovery and intelligent control strategies,the system energy efficiency is optimized.The research shows that the total heating capacity of the system during the heating season is 426 697.17 kWh,of which 43.25%comes from heat recovery,the peak heating capacity in January reached 157 896.53 kWh,and the energy efficiency ratio(COP)stability is significantly better than that of the traditional system.Through multi-stage temperature regulation,the electricity consumption of the heat pump accounts for 59.07%,and the total electricity consumption is lower than that of similar buildings.Compared with traditional water source heat pump systems,the system has smaller COP fluctuations in the temperature range of-20℃to 5℃,improved low-temperature adaptability,and maintains high energy efficiency during the transition season.
Keywords：water source heat pumpenergy-saving renovationTRNSYSsevere cold regions
Publication Date：2026-01-31
Online Publishing Date：2026-03-11(First online date of this platform, not the publication date of the document)
Pages：5( 6-10 )