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首页> 外文期刊>Building and Environment >Model development of Roof Thermal Transfer Value (RTTV) for green roof in tropical area: A case study in Singapore
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Model development of Roof Thermal Transfer Value (RTTV) for green roof in tropical area: A case study in Singapore

机译：热带地区绿色屋顶屋顶热转印价值（RTTV）的模型开发 - 以新加坡为例

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摘要

Green roofs have been used widely in tropical countries due to their energy-saving and passive cooling effect. However, the model to calculate a thermal performance evaluation metric has yet to be established, which has hindered the inclusion of green roof in the envelope thermal performance standards in building regulations. This paper aims to develop a model to predict Roof Thermal Transfer Value (RTTV) of green roofs under a tropical climate. Firstly, the efficiency and accuracy of hygrothermal transfer model of green roof was validated against field data, and annual heat gain through four types of green roofs was simulated. Subsequently, the RTTV of four green roofs was calculated based on linear interpolation between RTTV of a common bare roof and corresponding annual heat gain, which ranged from 2.29 to 2.49 W/m2. Given the complexity and time-consuming of RTTV calculation by the hygrothermal transfer model, three types of regression models were developed based on the dataset of four significant design factors and corresponding values of RTTV. And it was found that multilayer perceptron (MLP) regression method had a better performance than multiple regression (MR) and random forest (RF) method. Finally, the equivalent thermal resistance of plant layer was calculated based on the RTTV model and other five simplified calculation methods, and the implicit reason that differences exist among them were discussed. The conclusions drawn in this paper can provide a methodology for a quick evaluation of thermal performance of green roof during the early stages of design.
机译：由于节能和被动冷却效果，绿色屋顶已广泛使用。然而，计算热能评估度量的模型尚未建立，这阻碍了在建筑规定中包含了绿色屋顶在包络热性能标准中。本文旨在开发一种模型，以预测热带气候下的绿色屋顶的屋顶热转印值（RTTV）。首先，卫生热量转移模型的绿色屋顶湿热模型的效率和准确性被验证对现场数据，并模拟了四种类型的绿色屋顶的年热增益。随后，基于普通裸屋顶的RTTV与相应的年次热增益之间的线性插值来计算四个绿色屋顶的RTTV，其从2.29到2.49 W / m 2。鉴于HygroTMAL转移模型的RTTV计算的复杂性和耗时，基于四种重要设计因子的数据集和RTTV的相应值开发了三种类型的回归模型。结果发现，多层的感知者（MLP）回归方法具有比多元回归（MR）和随机林（RF）方法更好的性能。最后，基于RTTV模型和其他五种简化的计算方法计算了植物层的等效热阻，并且讨论了它们之间存在差异的隐含原因。本文绘制的结论可以提供一种方法，可以在设计早期阶段进行绿色屋顶的热性能的方法。

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  • 来源
    《Building and Environment》 |2021年第10期|108101.1-108101.16|共16页
  • 作者

    He Yang; Lin Ervine Shengwei; Tan Chun Liang; Yu Zhongqi; Tan Puay Yok; Wong Nyuk Hien;

  • 作者单位

    Natl Univ Singapore Sch Design & Environm Dept Bldg 4 Architecture Dr Singapore 117566 Singapore;

    Natl Univ Singapore Sch Design & Environm Dept Architecture 4 Architecture Dr Singapore 117566 Singapore;

    Natl Univ Singapore Sch Design & Environm Dept Architecture 4 Architecture Dr Singapore 117566 Singapore;

    Natl Univ Singapore Sch Design & Environm Dept Bldg 4 Architecture Dr Singapore 117566 Singapore;

    Natl Univ Singapore Sch Design & Environm Dept Architecture 4 Architecture Dr Singapore 117566 Singapore;

    Natl Univ Singapore Sch Design & Environm Dept Bldg 4 Architecture Dr Singapore 117566 Singapore;

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  • 正文语种 eng
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  • 关键词

    Thermal performance; Roof thermal transfer value; Green roof; Equivalent thermal resistance; Tropical area;

    机译：热性能;屋顶热转印值;绿色屋顶;等效热阻;热带地区;

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