用热管换热器回收密闭式鸡舍冬季换气中的余热

中国北方地区冬季气温低且冬季长，鸡舍结构上多采用密闭式以保温，使得冬季舍内空气质量恶化，须强制通风换气以保证空气质量，其结果使舍内气温降低。各种鸡舍在通风换气下舍温仅-2～3℃(东北地区舍温更低)，导致蛋鸡舍在冬季的生产性能下降5%～10%。由于冬季舍内排出的废气与补充的新风温差可达10～25℃，废气与新风还有湿度差，废气余热(包括显热和极少量的潜热)有一定的利用价值。为解决通风换气与保温这一对矛盾，该文提出将热管换热器用于回收密闭式鸡舍冬季排出废气中的余热。利用热管换热器可以将废气的50%以上余热回收以加热由舍外强制送入鸡舍的新风，以适当提高新风的温度。文中对热管换热器作了传热及阻力设计计算，对一定工况进行了参数优化并编制了通用程序。将热管换热器系统运用在鸡舍中运行，热管换热器实测热效率可达50%～65%，可节能、节省饲料 、提高产蛋率，有一定的推广价值。

Application of Thermal Pipe Heat-Exchangers to Waste Heat Recycling in Closed Hen House

In northern China the air quality in the most of hen house is poor due to a closed construction to keep out the cold wind during a long perio d of winter. However, an enforced ventilation to improve air quality brings abou t lower inside temperature. The differences in temperature and humidity between the odor air inside and fresh air outside came into being, which can reuse the waste heat. The difference in temperature reached 10～25℃, and the difference i n relative humidity reached above 30%.In the article the thermal pipe heat-exchangers were put forward to recover the waste heat from closed hen house in winter to resolve contradiction between ventilatio n and heat preservation. Over 50% of the waste heat could be utilized to heat t he fresh air from outside, the high temperature fresh air were blown into hen ho use by fan. In the paper heat transfer and flow resistance calculation were made , an automation program was developed and the parameters were optimized. The result of the experiments indicated that the heat efficiency(temperature ef ficiency) of thermal pipe heat-exchangers system reached 50%～65% in hen house. The application of thermal pipe heat-exchangers brought about saving energy, s aving forage and enhancing egg productive efficiency.