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fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Languages: English
Types: Unknown
Subjects: built_and_human_env
The paper describes a modeling study of heat transfer and buoyancy-driven airflow in double skin facades consisting of a glass outer layer, a control device (venetian blind) and a double-glazed inner skin. The modeling study was based on two approaches — a component-based, lumped parameter simulation which used a public domain, open source differential/algebraic equation solver and a detailed, CFD calculation which included air flow, conduction, convection and radiation. The primary objective of the work was to compare the performance of the simplified model with the output of a rigorous CFD calculation. A library of basic component models was developed, enabling a flexible approach to be taken to the\ud assembly of system models. The coupling of heat transfer processes with buoyancy-driven air flow was facilitated by the use of an equation-based simulation methodology. Simulation output was compared to experimental results obtained from a prototype section of facade, the performance of which had been characterised in a climatically-controlled solar simulator.
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    • Ansys 2005 Ansys CFX 2005, version 5.7.1, user manual. http://www.ansys.com/cfx/ Bar-Cohen, A and W M Rohsenow 1984. “Thermally optimum spacing of vertical, natural convectioncooled parallel plates” ASME Journal of Heat Transfer 106:116-123.
    • Brinkworth, B J, R H Marshall and Z Ibarahim 2000. “A validated model of ventilated PV cladding” Solar Energy 69(1):67 - 81.
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