The energy consumption and carbon emission caused by the construction industry is one of the important factors of global warming.Among them,the ventilation of old buildings is poor,and indoor air quality can only be adjusted by mechanical ventilation,resulting in more serious carbon emission problems in cold regions.In response,this paper proposes to carry out energy-saving retrofit of old office buildings in cold regions with new air heat recovery to improve the energy use rate of buildings,and conducts a comparative analysis of the energy-saving effect of two types of new air heat recovery systems based on the characteristics of buildings in cold regions and the use behavior of residents in summer.The analysis results show that in the case of turning on the air conditioning system only in summer,the annual energy saving of the all-heat type fresh air heat recovery system is 73.7 kW·h,and the static payback period is 4.46 years,while the annual energy saving of the sensible heat type fresh air heat recovery system is 12.73 kW·h,and the static payback period is 18.48 years,so that the all-heat type fresh air heat recovery is more suitable for energy-saving renovation of the buildings in cold regions.
carbon peakcarbon neutralitycold regionsheat recoverybuilding energy efficiencyretrofit of old houses
维普
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