Research on the carbon emissions calculation method and environmental-economic adaptability of architectural domestic hot water systems
This article employs theoretical calculations and TRNSYS software simulations to compute the annual carbon emissions and costs of different heat sources,including fuel,natural gas,electricity,air-source heat pumps,and solar energy.The aim is to analyze the environmental adaptability and economic benefits of various heat sources,in order to provide reference for the se-lection of low-carbon-oriented hot water systems and the prediction of carbon emissions in different regions of China.The results indicate that,in the six representative cities that span different cli-mate zones,the air-source heat pump and solar energy coupled system have the lowest carbon emission factors for hot water.The carbon emission factors for hot water using natural gas,fuel,and electricity as heat sources are 14.23,19.36 and 36.20 kgCO2e/t,respectively.The carbon e-mission factor for hot water using an air-source heat pump as a heat source is influenced by the en-vironmental temperature of the location,with the lowest being in Guangzhou,representing a warm winter and hot summer region,at 7.28 kgCO2e/t and the highest being in Shenyang,representing a severe cold region,at 11.26 kgCO2e/t.The carbon emission factor for hot water using electricity as an auxiliary heat source is influenced by the degree of solar energy accumulation in the location,with the lowest being in Lhasa,at 17.49 kgCO2e/t and the highest being in Chengdu,at 21.67 kg-CO2e/t.As for the carbon emission factor for hot water using solar energy and air-source heat pump coupled system as the heat source,the lowest is in Guangzhou,at 5.46 kgCO2e/t,and the highest is in Shenyang,at 7.78 kgCO2e/t.The unit heating cost of the solar energy system is higher than that of the heat pump and coupled system.Except for Chengdu,the unit heating cost of the coupled system is lower than that of the heat pump system,and it has significant economic benefits and low-carbon benefits in Lhasa,Shenyang,Beijing,and Kunming.In the Guangzhou ar-ea,the economic benefits of the two are similar,but the cost emphasis is different,while in the Chengdu area,the economic benefits of the air-source heat pump system are significantly higher than those of the coupled system.
万方数据
维普
