Adaptability of Air Sensible Heat Recovery Device and System Applied to Office Buildings in Beijing

Taking office buildings in Beijing as the emphatic research subjects and combining actual measurement,this study chooses the plate-fin and wheel sensible heat recovery devices and systems applied widely to office buildings in Beijing as the measurement subjects,and analyzes the comprehensive effect of outdoor temperature and wind speed on heat recovery efficiency,reduction of fresh air load,and annual operating energy consumption.Results show that during the winter heating period,the sensible heat efficiency η of the plate-fin sensible heat exchanger is about 60% ~70% when the face velocity v_y is less than 1.5 m/s,and the sensible heat recovery system can reduce more than 50% of fresh air load.The plate-fin and wheel sensible heat exchangers have worse adaptability in summer in Beijing.In most time of summer,their sensible heat recovery efficiencies η are less than 60%,which does not conform to the regulation of "design standard for energy efficiency of public buildings".