Load and Optimization of Air Conditioning System of Passive Buildings in Severe Cold and Cold Zones
Passive ultra-low energy buildings can significantly reduce heating energy consumption because of their excellent air tightness and high insulation characteristics,which has great energy-saving advantages.This paper establishes an office building model with DeST.Taking Urumqi and Beijing as typical cities,this paper simulates benchmark building and passive building and analyzes the energy saving potential of passive building in cold regions,developing the thermal parameters sensitivity of building envelope.The influence of external walls and windows of different heat transfer coefficients and different airtightness on building load in cold region is discussed quantitatively.In addition,the optimization design of air conditioning cold and heat source scheme in Urumqi is carried out.The results show that from Urumqi to Beijing,the heating energy-saving rate of passive buildings increases gradually.For small and medium-sized passive office buildings in Urumqi,the total energy consumption of a variable refrigerant flow air conditioning system is lower,but the screw electric refrigerating machine combined with air source heat pump is more economical.This study has a reference value for the implementation of new passive ultra-low energy office buildings in severe cold and cold regions.
passive ultra-low energy buildingsloadnatural lightingoptimal designDeST
NETL
NSTL
万方数据
