Design and operation analysis of dual-heat source heating system of air-source heat pumps and municipal heating

This paper presents the heating energy-saving renovation of a project in Beijing.From the perspectives of reducing investment costs,lowering later maintenance expenses,shortening the investment payback period,and coping with extreme weather,a dual-heat source operation scheme of low-temperature air-source heat pumps and municipal heating is selected according to local conditions.After the renovation is completed,through the operation of one heating season,compared with the traditional municipal steam heating system,the total energy consumption of the dual-heat source heating system is reduced by 49.4%,and the heating cost is reduced by 650 084.23 yuan.This fully verifies the energy-saving and emission-reduction effects of the dual-heat source heating scheme and provides a new idea for heating energy-saving renovation.