自然通风猪舍高压喷雾降温系统的降温效率  

Cooling efficiency of a high-pressure fog cooling system for natural ventilation pig barn

作　　者：周忠凯[1,2] 李辉 秦竹[1,2] 孙倩 顾洪如[3] 夏礼如 余刚[1,2] 

机构地区：[1]江苏省农业科学院农业设施与装备研究所,江苏南京210014 [2]农业部长江中下游设施农业工程重点实验室,江苏南京210014 [3]江苏省农业科学院畜牧研究所,江苏南京210014

出　　处：《江苏农业学报》2018年第1期106-113,共8页Jiangsu Journal of Agricultural Sciences

基　　金：江苏省农业科技自主创新基金项目[CX(12)1001-04];江苏省科技支撑计划项目(BE2014342-1)

摘　　要：为确定高压喷雾降温系统在夏季自然通风发酵床猪舍的适用性,选择2栋发酵床育肥猪舍,对不同气象条件下猪舍内的温湿度和风速进行了测定,选择温湿度指数、热负荷指数和综合气候指数3种指标评估了高压喷雾降温系统对猪舍内热环境的影响。结果显示试验期间高压喷雾系统的降温效率在18.4%至89.2%之间,平均为59.1%;与无喷雾猪舍相比,高压喷雾降温系统可有效降低舍内温度6.2℃,最高降低10.5℃,湿度增加23.9个百分点(平均湿度为72.2%);整个试验期间,喷雾猪舍平均温湿度指数(THI)为74.3(比无喷雾猪舍降低12.2),热应激减少23.7%,喷雾猪舍热负荷减少2 713,综合气候指数(CCI)平均降低4.8℃。高压喷雾降温系统可以有效缓解自然通风发酵床猪舍内生猪遭受的热应激。To investigate the suitability of high-pressure fogging system( HPFS) for natural ventilation pig barn( NVB) with bedding system,experiments were conducted in two naturally ventilated pig barns under summer conditions.One pig barn was used as the treatment barn( fogged house,FNVB) and another was used as the control house( un-fogged house,UFNVB). Cooling efficiency of HPFS was defined by determination of dry-bulb temperature,relative humidity and air velocity in the interior of pig barns in different weather conditions. Heat stress was assessed using the temperature humidity index( THI) and the daily THI-hrs index and comprehensive climate index( CCI) for evaluation of thermal comfort in pig barn. The results showed that the cooling efficiency of the HPFS ranged from 18.4% to 89.2%,and the average value was 59.1%. The HPFS could effectively decrease the indoor temperature by 6.2 ℃. The greatest difference of temperature between UFNVB and FNVB was 10. 5 ℃. The air relative humidity in the FNVB was 72. 2%,increased by 23. 9%.The THI value was reduced by 12.2 in the FNVB( average value was 74. 3). The values of the daily THI-hrs index and CCI under heat-stress conditions in FNVB were reduced by 2 713 and 4. 8 ℃,respectively. In conclusion,high-pressure fog cooling system can effectively alleviate the heat stress of pigs in natural ventilation pig barn with bedding system.

关 键 词：猪舍 高压喷雾降温系统 温度 相对湿度 温湿度指数 综合气候指数 

分 类 号：S815.9[农业科学—畜牧学]