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| 日光温室自然对流蓄热中空墙体蓄放热效果研究 |
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任晓萌1, 程杰宇1, 夏楠2, 赵淑梅1, 崔文慧3, 马承伟1, 王庆荣1
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| (1.中国农业大学 水利与土木工程学院, 北京 100083;2.北京中农富通园艺有限公司, 北京 100083;3.北京派得伟业科技发展有限公司, 北京 100097) |
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| 摘要: |
| 研究新型自然对流循环蓄热中空墙体的蓄放热效果，采用自计式传感器连续测试墙体内的温度分布及室内表面的热流量，对该墙体的蓄放热特性进行研究。结果表明：新型墙体内部的温度分布规律与传统的实心墙体构造不同，从内表面至外表面，并不是持续下降的趋势；在晴天白天，内部中空层两侧墙体表面的温度高于相邻实心构造部分，但比中空层空气温度的19.2℃分别低2.2和3.7℃，表明墙体深处处于蓄热状态；清晨温度较低时刻，中空层两侧表面温度分别比其中空气温度的11.7℃高出1.3和0.8℃，表明墙体内部直至清晨仍处于放热阶段。墙体内各点的温度波动幅度显示，晴天中空层两侧表面和空气温度的波动幅度分别可达4.9、4.0和8.2℃，表明墙体内部表面蓄热放热作用显著；阴雪天气下也表现出一定的蓄热放热效果。研究表明，该新型自然对流循环蓄热中空墙体构造可以有效调动墙体深处材料参与蓄热放热过程，显著增加墙体的总蓄热放热面积。 |
| 关键词: 日光温室 墙体 对流 蓄热 放热 |
| DOI：10.11841/j.issn.1007-4333.2017.02.014 |
| 投稿时间：2016-03-18 |
| 基金项目:公益性行业（农业）科研专项（201203002）；现代农业产业技术体系建设（CARS-25-D-04）；“十二五”农村领域国家科技计划课题（2013AA102407） |
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| Study on the effect of natural convective hollow wall on thermal storage/release in solar greenhouse |
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REN Xiaomeng1, CHENG Jieyu1, XIA Nan2, ZHAO Shumei1, CUI Wenhui3, MA Chengwei1, WANG Qingrong1
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| (1.College of Water Resource & Civil Engineering, China Agriculture University, Beijing 100083, China;2.Beijing Zhongnong Futong Horticulture Co., LTD, Beijing 100083, China;3.Beijing PAIDE Science & Technology Development Co., LTD, Beijing 100097, China) |
| Abstract: |
| To explore the effect of natural convective hollow wall,a field test was carried out.The temperature of different depth wall and the heat flux of the interior surface were measured with the self-meter sensor in comparison with traditional solid wall.The results showed that:Temperature distribution in this new type of wall is different to the traditional solid wall structure.From the inner surface to the outer surface,the temperature did not show a trend of downward trend;Under sunny day daylight,the air temperature of hollow layer reaches 19.2℃.The temperature of wall surface in two sides of hollow layer is higher than that in the adjacent solid structural parts,and lower than the air temperature of hollow layer by 2.2 and 3.7℃,respectively,indicating that the deep part of the wall is in the heat storage state;In the early morning,when the temperature is low,the temperature of the hollow layer surfaces and air temperature are 1.3 and 0.8℃ higher respectively than the air temperature of hollow layer which can reach 11.7℃.It indicates that the interior of the wall is still in the heat release state in early morning;In the sunny day,the temperature fluctuations of the hollow layer surfaces and air temperature fluctuations can respectively reach 4.9,4.0 and 8.2℃,the results show that the heat storage/release in the internal surface of the wall is remarkable;The effect of heat release/release is also showed in the cloudy and snowy day.In conclusion,the study shows that the new type thermal storage/release system of natural convective hollow wall can significantly improve the thermal storage/release capacity of the wall and significantly increase the total heat transfer area of the wall. |
| Key words: solar greenhouse wall convection heat storage heat release |
