Experimental study on a novel all outdoor air handling unit under winter condition

Designs a novel rotary heat exchanging direct evaporative all outdoor air handling unit （AHU）. The unit changes outdoor air parameters using enthalpy potential laboratory. Tests the performance of AHU under the winter condition. The results show that coefficient of performance of the heat pump system is increased by improving the operating environment of the heat pump system of the experimental AHU unit. The coefficient of performance of the heat pump system is 3.3 at 0 ℃ of the outdoor air temperature. The integrated energy efficiency ratio of the unit is increased with the outdoor air temperature decreasing, reaching the highest value of 5.6. The energy saving effect of the unit is obvious.