不同传热系数南墙传热动态过程特征的研究
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摘要
以长江中下游地区上海为典型城市的代表,用CFD数值模拟的方法,量化分析了在冬季不同传热系数南墙传热过程的特征。研究结果表明,传热系数越大,南墙整体温度越低,这有利于墙体对太阳能的实际吸收效果,故虽然传热系数越大,南墙的温差传热损失越多,但传热系数增大4倍时,南墙外表面的全天热损失仅高出1.5倍。因此在这一地区提高建筑围护结构保温性能,对降低供暖能耗作用的有限。
Taking the representative of Shanghai as a typical city in the middle and lower reaches of the Yangtze River, the CFD numerical simulation method is used to quantitatively analyze the characteristics of the heat transfer process of the south wall with different heat transfer coefficients in winter. The results show that the difference of heat transfer coefficient has a greater influence on the inner surface temperature of the south wall. The higher the heat transfer coefficient, the lower the temperature of the inner surface of the south wall. Moreover, the greater the heat transfer coefficient, the more heat loss on the outer surface of the south wall throughout the day. When the heat transfer coefficient is increased by four times, the total heat loss on the outer surface of the south wall is more than 1.5 times higher. Therefore, in the winter sunny weather in this area, the smaller the heat transfer coefficient, the more conducive to building energy.
Taking the representative of Shanghai as a typical city in the middle and lower reaches of the Yangtze River, the CFD numerical simulation method is used to quantitatively analyze the characteristics of the heat transfer process of the south wall with different heat transfer coefficients in winter. The results show that the difference of heat transfer coefficient has a greater influence on the inner surface temperature of the south wall. The higher the heat transfer coefficient, the lower the temperature of the inner surface of the south wall. Moreover, the greater the heat transfer coefficient, the more heat loss on the outer surface of the south wall throughout the day. When the heat transfer coefficient is increased by four times, the total heat loss on the outer surface of the south wall is more than 1.5 times higher. Therefore, in the winter sunny weather in this area, the smaller the heat transfer coefficient, the more conducive to building energy.
引文
[1]杨昭,郁文红,张甫仁.建筑物冬季太阳辐射得热分析[J].太阳能学报, 2005,(01)
[2]刘倩,张旭.上海某住宅建筑围护结构能耗模拟与节能性分析[J].建筑科学, 2007,(12)
[3]李贺,钟珂,张红婴,亢燕铭.墙体保温形式对冬季太阳能实际吸收率的影响[J].哈尔滨工程大学学报,2018,39(11)
[4]张红婴,钟珂,刘加平.太阳辐射吸收系数对围护结构夏季净得热量的影响[J].太阳能学报, 2017, 38(01)
[5] Kossecka E, Kosny J. Influence of insulation configuration on heating and cooling loads in a continuously used building[J].Energy&Buildings, 2002, 34(4).
[6] Gómez M A,álvarez Feijoo M A, Comesa?a R, Eguía P, Mígu-ez J L, Porteiro J. CFD Simulation of a Concrete Cubicle to Analyze the Thermal Effect of Phase Change Materials in Buil-dings[J]. Energies, 2012, 5(7)
[7]中华人民共和国住房和城乡建设部. GB50176-2016民用建筑热工设计规范[S].北京:中国建筑工业出版社, 2016
[2]刘倩,张旭.上海某住宅建筑围护结构能耗模拟与节能性分析[J].建筑科学, 2007,(12)
[3]李贺,钟珂,张红婴,亢燕铭.墙体保温形式对冬季太阳能实际吸收率的影响[J].哈尔滨工程大学学报,2018,39(11)
[4]张红婴,钟珂,刘加平.太阳辐射吸收系数对围护结构夏季净得热量的影响[J].太阳能学报, 2017, 38(01)
[5] Kossecka E, Kosny J. Influence of insulation configuration on heating and cooling loads in a continuously used building[J].Energy&Buildings, 2002, 34(4).
[6] Gómez M A,álvarez Feijoo M A, Comesa?a R, Eguía P, Mígu-ez J L, Porteiro J. CFD Simulation of a Concrete Cubicle to Analyze the Thermal Effect of Phase Change Materials in Buil-dings[J]. Energies, 2012, 5(7)
[7]中华人民共和国住房和城乡建设部. GB50176-2016民用建筑热工设计规范[S].北京:中国建筑工业出版社, 2016