A Study of the Impact of Exhaust Heat Recovery on Public Building Energy Consumption in Seasonal Extreme Temperatures.

Taking Yiyang meteorological parameters as an example, according to the enthalpy discriminant relation between fresh air and exhaust air, we assess the impact on public buildings using exhaust air total heat recovery in hot summer and cold winter area. Three typical buildings are taken to analyze the distribution of the building total cold (heat) load and the fresh air cool (heat) load, we calculate the reduced load after the fresh air is treated by the exhaust air total heat recovery unit (EATHRU) and analyze the economic efficiency of the fresh air exchange device. The results show that using the exhaust air total heat recovery unit, the total cooling load of the whole building can be reduced by more than 45% and the total heat load is reduced by more than 20%. Although the EATHRU price is more expensive, the return on investment of the fresh air system will increase, but the investment and operation cost of cold heat source unit and pump are all reduced, the total investment change is not big but can greatly save operating expenses. [ABSTRACT FROM AUTHOR]

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