Consideration and discussion on selection of air conditioning cold and heat source system under carbon constraint

 In 2020, “carbon peaking and carbon neutrality” has become a major national strategy in China. The full life cycle carbon emissions of buildings account for more than half of the national energy carbon emissions. It is important to reduce building carbon emissions further for the building industry. The building air conditioning cold and heat source system is one of the substantial parts that affects building carbon emissions, and should have the conditions to adapt to the transformation of the energy system. This paper analyses the carbon emission intensity of different types of air conditioning cold and heat source systems. The carbon emission intensity of the cold and heat source systems is closely related to the carbon emission factor of the regional power grids.The level of the carbon emission factor of the regional power grids plays a decisive role in the selection of the cold and heat source system. With the optimization of energy structure in China, the carbon emission factor of regional power grids has been significantly reduced, and the electrification of cold and heat source systems is the main development direction under carbon constraint.