Near-Roof Air Temperatures: Modelling the Implications for HVAC Performance and Cool Roofs

被引：1

作者：

Green, Alan ^{[1
]}

Gomis, Laia Ledo ^{[1
]}

Paolini, Riccardo ^{[2
]}

Haddad, Shamila ^{[2
]}

Kokogiannakis, Georgios ^{[1
]}

Cooper, Paul ^{[1
]}

Ma, Zhenjun ^{[1
]}

Kosasih, Buyung ^{[1
]}

Santamouris, Mattheos ^{[2
]}

机构：

[1] Univ Wollongong, Sustainable Bldg Res Ctr, Wollongong, NSW, Australia

[2] Univ New South Wales, Fac Built Environm, Sydney, NSW, Australia

来源：

PROCEEDINGS OF BUILDING SIMULATION 2019: 16TH CONFERENCE OF IBPSA | 2020年

关键词：

CONVECTIVE HEAT-TRANSFER; COEFFICIENT;

D O I：

10.26868/25222708.2019.210426

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Conventionally in building performance simulations (BPS), it is assumed that air entering outdoor HVAC equipment is at the outdoor 'ambient' temperature, obtained from a weather file. However, significant spatial variations exist in outdoor air temperature fields, especially within the thermal boundary layers that form near exposed surfaces like roofs. Experiments were conducted at three large-footprint shopping centre buildings, to characterise the above-roof temperature field. An empirical model was derived from the experimental data, and applied in BPS of a shopping centre with rooftop HVAC equipment in seven Australian climates. In these cases, the electricity savings and gas `penalties' attributable to cool roofs would have been underestimated by 44-85% (61% on average) if near-roof air temperature variations had not been modelled accurately.

引用

页码：1342 / 1348

页数：7

共 20 条

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