Abstract:In order to explore a kind of ventilation method with heat preservation, high efficiency and low operating cost about the chicken house, according to the principle of thermal balance, the fresh air ventilation system was adopted for the ventilation of chicken house, which used a high efficiency gasair plate heat exchanger. It was different from the traditional platefin sandwich type heat exchange core body, but the special design at the inlet and outlet increased the length of countercurrent portion and reduced the length of crossflow portion. The fresh air passage and exhaust passage were arranged at intervals in honeycomb body. It was a heat recovery ventilation system with low production cost, simple manufacturing process and high heat exchange efficiency. The temperature, relative humidity, sensible heat exchange efficiency, and growth performance of the chicken house were monitored with a fresh air ventilation system installed, and the cost of regenerative fresh air ventilator was analyzed. The test results showed that the temperature and relative humidity of test group and control group can meet the requirements of each week. And at the fourth week, the air temperature and relative humidity in the test group were 24.91℃ and 48.96%, respectively, which were significantly lower than those in the control group (P<0.01). At the fourth week, the carbon dioxide mass concentration, ammonia mass concentration, PM25 concentration and PM10 concentration in the test group were 2.36116mg/m3, 7.28mg/m3, 12.54mg/m3 and 107.58mg/m3, respectively, which were significantly lower than those in the control group (P<0.01). The air quality and ventilation effects of the test group were better than those in the control group. The average sensible heat exchange efficiency of the fresh air ventilation system can reach 80% during 19:00—07:00. The fresh air ventilation system can greatly recover the heat from the exhaust gas; there was no significant difference in length and body weight between the test group and the control group (P>0.05), which indicated that the heat recovery and fresh air ventilator can meet the growth needs of the chickens; from the heat recovery effect point of view, when the outdoor temperature during the test was -8~8℃, the recovery cost days was about 80d. When the outdoor temperature was lower than 19℃, the fresh air ventilation system can balance the heat recovery efficiency and ventilation requirements and meet the ventilation and energy saving needs of livestock houses. It was concluded that it had a good ventilation effect when the fresh air ventilation system was used in a chicken house. It was an effective way to solve the contradiction between heat insulation and ventilation of a chicken house.