CAJ | 학술논문

为改善老旧黏土砖墙的保温蓄热性能，使用发泡水泥对黏土砖墙进行加厚并进行了试验测试。对照温室黏土砖墙由120 mm黏土砖+100 mm聚苯板+240 mm黏土砖（从室内至室外）构成，试验温室结构、管理与对照温室相同，仅北墙采用200 mm 的发泡水泥对原有黏土砖墙进行了加厚（简称为“改造砖墙”）。通过对比分析2温室墙体在典型晴天和阴天内的温度变化，表明：在晴天夜间，黏土砖墙和改造砖墙外表面温度比室外气温分别高(2.8±0.9)和(0.8±0.2)℃，黏土砖墙和改造砖墙内表面温度比室内气温分别高(1.5±0.5)和(2.4±0.2)℃。在阴天，黏土砖墙全天内表面温度全天低于室内气温，而改造砖墙内表面温度在17：30－次日08：00期间较室内气温高(0.3±0.2)℃。因此，采用发泡水泥加厚黏土砖墙不仅可减少墙体热损失，还能增加墙体夜间散热量。
위개선로구점토전장적보온축열성능，사용발포수니대점토전장진행가후병진행료시험측시。대조온실점토전장유120 mm점토전+100 mm취분판+240 mm점토전（종실내지실외）구성，시험온실결구、관리여대조온실상동，부북장채용200 mm 적발포수니대원유점토전장진행료가후（간칭위“개조전장”）。통과대비분석2온실장체재전형청천화음천내적온도변화，표명：재청천야간，점토전장화개조전장외표면온도비실외기온분별고(2.8±0.9)화(0.8±0.2)℃，점토전장화개조전장내표면온도비실내기온분별고(1.5±0.5)화(2.4±0.2)℃。재음천，점토전장전천내표면온도전천저우실내기온，이개조전장내표면온도재17：30－차일08：00기간교실내기온고(0.3±0.2)℃。인차，채용발포수니가후점토전장불부가감소장체열손실，환능증가장체야간산열량。
The wall of a Chinese solar greenhouse can absorb heat during daytime and supply heat into the greenhouse during nighttime. It can help the solar greenhouse to maintain high indoor air temperature during winter nighttime with little or no supplemental heating. The brick wall is one of the popular walls. However, after a long period of use, walls have the bad performance on heat insulation and sealing. To solve the problems, we proposed to thicken the brick wall with foam cement to decrease its heat loss and keep the heat in the wall as much as possible. Then, the stored heat that the wall can supply during the nighttime can be increased. In this study, a solar greenhouse with the brick wall, which was composed of 120 mm thick brick, 100 mm thick polystyrene board, and 240 mm thick brick (from indoor to outdoor), was used as the control greenhouse. The test greenhouse had same structure and management with the control greenhouse, but its brick wall was thickened with 200 mm thick foam cement on the outdoor side. This wall was defined as the transformed wall. The heat insulation and supply performances of the two solar greenhouses’ walls were compared based on the data collected in a typical sunny day and a cloudy day. As for the heat insulation performance, the outdoor surface temperatures of the brick wall and the transformed wall were (2.8±0.9) and (0.8±0.2)℃ higher than the outdoor air temperature, respectively, in the nighttime of the sunny day. The maximum heat flux in the foam cement was about 9%of that on the outdoor surface of the brick wall. A similar phenomenon was also observed in the nighttime of the cloudy day. The results indicated that thickening the brick wall with foam cement could decrease the heat loss of the wall and keep more heat in the wall. As for the heat supply performance, the indoor surface temperatures of the brick wall and the transformed wall were (1.5±0.5) and (2.4±0.2)℃higher than the outdoor air temperature, respectively, in the nighttime of the sunny day. The results indicated that, by preventing wall from losing heat to the outdoors, the foam cement layer of the transformed wall could increase the amount of heat supplied into the greenhouse during nighttime. On the cloudy day, the indoor surface temperature of the brick wall was lower than the indoor air temperature. However, the indoor surface temperature of the transformed wall was (0.3±0.2)℃higher than the indoor air temperature during the period from 17:30 to 08:00 in the next day. It indicated that the brick wall had been absorbing heat from the indoor air all through the day. The results further confirmed that the foam cement layer of the transformed wall could increase the heat insulation performance of the wall. As a result, the indoor air temperatures of the control greenhouse during night time of the sunny day and cloudy day were (1.3±0.6) and (0.8±0.3)℃lower than those of the test greenhouse, respectively. After all, it is concluded that thickening the brick wall with foam cement on the outdoor side can improve its heat insulation and supply performance.