Research on Influencing Factors of Airconditioning Electricity Demand Flexibility for Nearly Zero Energy Commercial Buildings

Abstract

For nearly zero energy buildings, it is of great significance to make full use of the renewable energy of the air-conditioning system's electricity demand flexibility. The commercial building is the main body of the social electricity consumption, and its air-conditioning load alone can reach more than 50% of its peak load. It can be seen that the electricity load of the building air conditioning system is an important control target for commercial buildings to achieve nearly zero energy consumption. The main technology is to coordinate and control the flexibility of the air-conditioning system load and the intermittent power generation of renewable energy based on the integrated energy management digital platform, so as to achieve the greatest reduction in the fossil energy consumption of the building. This study selects five typical commercial buildings as the research objects, i.e., large, medium and small office buildings, super markets and general hotels. The influence of different parameters on the demand flexibility of commercial buildings is analyzed from three aspects: outdoor air parameters, thermal comfort parameters and thermal performance of envelope structure. Based on the digital technology and energy consumption analysis software (EnergyPlus), this study integrates energy efficiency assessment methods; establishes a commercial building air-conditioning energy consumption model; simulates and analyzes the impact of three types of parameter changes on the building load change rate and demand flexibility; thus the degree of influence of the three types of parameters on the building demand is obtained. This study established a typical model database of commercial buildings to support the follow-up research on the effect of other