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A study on the effect of heat source location in a ventilated room using multiple regression analysis

Cho, Youngjun and Awbi, H. 2007. A study on the effect of heat source location in a ventilated room using multiple regression analysis. Building and Environment 42 (7) , pp. 2072-2082. 10.1016/j.buildenv.2006.03.008

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Abstract

Multiple regression analysis is a statistical technique which allows to predict a dependent variable from more than one independent variable and also to determine influential independent variables. Using experimental data, in this study the multiple regression analysis is applied to predict the room mean velocity and determine the most influencing parameters on the velocity. More than 120 experiments for four different heat source locations were carried out in a test chamber with a high level wall mounted air supply terminal at air change rates 3–6 ach. The influence of the environmental parameters such as supply air momentum, room heat load, Archimedes number and local temperature ratio, were examined by two methods: a simple regression analysis incorporated into scatter matrix plots and multiple stepwise regression analysis. It is concluded that, when a heat source is located along the jet centre line, the supply momentum mainly influences the room mean velocity regardless of the plume strength. However, when the heat source is located outside the jet region, the local temperature ratio (the inverse of the local heat removal effectiveness) is a major influencing parameter.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Architecture
Subjects: N Fine Arts > NA Architecture
T Technology > TH Building construction
Uncontrolled Keywords: Heat source locations ; Plumes ; Mixing ventilation; Room velocity ; Multiple regression analysis
Last Modified: 31 Jul 2020 01:30
URI: https://orca.cardiff.ac.uk/id/eprint/14793

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