In the context of"Dual-Carbon Goals"(realizing carbon peak before 2030 and carbon neutrality before 2060)in China,buildings are required to eliminate direct carbon emissions.Therefore,the composite framework of Air Source Heat Pump(ASHP)and water-cooled chiller is increasingly adopted in hot summer and cold winter regions.ASHP provides heating in winter and cools with the water-cooled chiller in summer.Since the cooling efficiency of ASHP is lower than that of the water-cooled chiller,increasing the capacity of the latter contributes to reducing the cooling energy consumption.Meanwhile,the investment increases accordingly.The comprehensive optimization method of air conditioning heating and cooling source configuration is in necessity.The analytic hierarchy process is applied to derive weights of multidimensional evaluating indicators,and the objective function is established.The optimization process and the mathematical models are proposed.An office building in Shanghai is analyzed as an example.Results show that as the capacity of water-cooled chiller increases,the annual energy consumption decreases,the consumables production and the equivalent annual cost increase,while the carbon emission follows a non-monotonic pattern.Thus,multi-objective optimization can balance the overall performance and the cost of air conditioning system,which provides reference for relevant research and actual project decision-making.
multi-objective optimizationanalytic hierarchy processair-source heat pumpwater-cooled chillerhot summer and cold winter zone