地面加热系统温室热环境测定与经济分析  

Analysis of thermal environment of greenhouse with floor heating system

作　　者：曲梅[1] 马承伟[1] 李树海[1] 张天柱[1] 

机构地区：[1]中国农业大学

出　　处：《农业工程学报》2003年第1期180-183,共4页Transactions of the Chinese Society of Agricultural Engineering

摘　　要：温室加热系统对温室冬季耗能有一定的影响。地面加热系统能够合理地利用加热系统的供暖热能 ,使之充分有效地供给座落在地面上的植物 ,并降低植物冠层上部温室空间的气温 ,减少了温室的能耗 ,这也是温室冬季节能的一种非常有效的方法。该文研究了应用地面加热系统的温室热环境 ,测试结果表明 ,温室有较好的空气温度分布。温度水平分布均匀 ,南北方向上温度差异在 1℃左右 ;温度垂直梯度分布为从地面附近到保温幕下气温逐渐降低 ,但温度降低幅度比较小 ,在 1℃以内 ,与传统加热方式的保温幕下高地面附近低的温度垂直梯度分布有明显不同。温室夜间植物根部温度在 19～ 2 5℃。与传统加热方式相比 ,采用地面加热的温室热环境比较有利于植物生长。该文还以传统加热系统为比较对象 ,简单分析了地面加热系统的节能效果、散热器投资和运行效益 ,结果表明地面加热系统比传统加热系统节约能源 2 8% ,散热器投资费用可以节省 3 4.1% ,每年降低运行费用 3万多元。Floor heating system is an effective way to save energy in the greenhouse, which utilizes its heat in a rational way and heats only the local area of plants growing on the floor. The temperature above canopies is at a lower level, so the heat consumption in the greenhouse is reduced. An experiment was developed to investigate the thermal environment in a potflower greenhouse which using a floor heating system. The results of the experiment showed that there was better temperature distribution in the greenhouse. In north south horizontal direction, the temperature difference was about 1℃; the vertical temperature from floor to screen gradually decreased about 1℃; and the crop root temperature was from 19℃ to 25℃ at night. The thermal environment in this greenhouse is more suitable for plant development. This paper also analyzed the energy saving and economic profit for the floor heating system, compared with the traditional heating system. 28% of energy consumption, 34.1% of heat distributor investment and about RMB30000 of annual operational costs were saved in this system.

关 键 词：地面加热系统 温室 热环境 测定 节能 经济效益分析 

分 类 号：S625.51[农业科学—园艺学]