The thermal comfort sweet-spot: A case study in a residential house in Waikato, New Zealand

AL-Rawi, Mohammad (2021) The thermal comfort sweet-spot: A case study in a residential house in Waikato, New Zealand. Case Studies in Thermal Engineering . ISSN 2214157X (In Press)

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Official URL: https://www.sciencedirect.com/science/article/pii/...

Abstract or Summary

A longitudinal study has revealed that 50% of New Zealand children sleep in rooms that fall below the expected standard for thermal comfort during the winter months. Causes include older insulation and glazing standards for residential homes, poor materials, inadequate ventilation, and residents being unable to afford heating. These combined factors result in poor indoor environmental quality (IEQ). This paper aims to analyse experimentally and computationally the thermal comfort in a bedroom occupied by two children (aged eight and three) from 19:00 to 7:00. The experiment was carried out during June 2021. The measured data were particulate matter (PM2.5), relative humidity (RH%), and air temperature (, captured with an air image sensor. In order to find appropriate thermal comfort parameters, computational fluid dynamics (CFD) models with four heat pump temperature settings (19, 20, 21 and 22 were investigated to assess the predicted mean vote (PMV), predicted percentage dissatisfied (PPD) and the local air quality index (LAQI) for the expired air. Measurements and CFD results show that setting the heat pump temperature to 22 is aligned with the ISO 7730:2005, ASHRAE STANDARD 55 recommendation for thermal sensation and also meets the New Zealand Standard NZS4246:2016.

Item Type:Journal article
Keywords that describe the item:Thermal comfort parameters, Indoor environmental quality, Computational fluid dynamic, Waikato, New Zealand
Subjects:T Technology > T Technology (General)
T Technology > TD Environmental technology. Sanitary engineering
T Technology > TJ Mechanical engineering and machinery
Divisions:Schools > Centre for Engineering and Industrial Design
ID Code:7835
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Deposited On:18 Oct 2021 20:07
Last Modified:18 Oct 2021 20:07

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