Effect of solar radiation on human thermal comfort in a tropical climate

Chaiyapinunt, Somsak; Khamporn, Nopparat

doi:10.1177/1420326x19891761

Cited by 17 publications

(8 citation statements)

References 15 publications

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“…This low indoor temperature obtained by the PMV-based controller is due to the high direct solar heat gains acquired through the windows during the winter. Indeed, these direct solar heat gains could affect the indoor thermal comfort levels, 48 and require cooling to maintain the PPD index at 5%. The extra cooling energy demand by the PMV-based controls compared to the temperature-based controls is depicted clearly in Figure 8(a).…”

Section: Influence Of the Walls' R-valuementioning

confidence: 99%

Influence of building envelope characteristics on the effectiveness of PMV-based controls for schools located in Saudi Arabia

Alaidroos

Almaimani

Krarti

et al. 2022

Indoor and Built Environment

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This paper summarizes the results of a comprehensive analysis to investigate the performance of both thermal comfort-based and temperature-based controls for schools in harsh hot climates of Saudi Arabia. The analysis considers the impact of building envelope characteristics including thermal insulation level of exterior walls and air leakage rate on the ability of both control options to maintain indoor thermal comfort while minimizing cooling energy consumption. The analysis utilizes a calibrated energy model for an existing Saudi school with monitored energy consumption data. The analysis results indicated that the thermal comfort-based control is able to maintain the predicted percentage of dissatisfied (PPD) value at 5% throughout the year for any combination of the exterior wall’s R-value and air infiltration rate unlike the case of the temperature-based controls that do not maintain acceptable indoor thermal comfort conditions. However, the thermal comfort-based controls consume more cooling energy than the temperature-based controls. The analysis also revealed that the difference between the annual cooling energy of the PMV-based control and the temperature-based controls increases almost linearly with the cooling degree days of the site where the school is located. The analysis results indicate that acceptable indoor thermal comfort levels can be achieved using temperature-based controls when optimal temperature set points are used.

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Section: Influence Of the Walls' R-valuementioning

confidence: 99%

Influence of building envelope characteristics on the effectiveness of PMV-based controls for schools located in Saudi Arabia

Alaidroos

Almaimani

Krarti

et al. 2022

Indoor and Built Environment

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“…Mirzabeigi et al 21 demonstrated that wet bulb globe temperature (WBGT) can be used as a thermal stress index to assess the effect of indoor direct solar radiation on occupants' thermal comfort by calculating ΔWBGT. Chaiyapinunt et al 22 investigated and analyzed the impact of solar radiation on the overall thermal comfort and local thermal comfort conditions of people sitting near glass windows in tropical climate buildings, using predicted percentage dissatisfaction (PPD) and planar radiation temperature asymmetry (RTA) as primary indicators.…”

Section: Introductionmentioning

confidence: 99%

Application of CPMV* for improving the indoor thermal environment under global solar radiation

Zhang

Duan

Yang

et al. 2022

Indoor and Built Environment

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The impacts of solar radiation on indoor thermal comfort are growing with the popularity of curtain walls in modern constructions. In order to accurately assess indoor thermal comfort under global solar radiation, a previous study proposed a corrected predicted mean vote with global solar radiation (CPMV*) and validated the model in summer. To further investigate the year-round applicability of the model, field experiments were conducted in transparent envelope buildings in winter, and 1098 valid thermal responses were obtained. The results indicate that CPMV* fits well with the thermal sensation vote, and it has important applications in guiding the design of indoor thermal environments and the operation of ventilation and air conditioning systems throughout the year. Besides, the predicted percentage dissatisfied with global solar radiation and the percentage unacceptable are proven to be feasible in evaluating the thermal acceptability of buildings with solar radiation. Based on CPMV*, we can calculate the indoor thermal comfort zone matching various solar radiation intensities and reasonably regulate the actual operation of the heating, ventilation and air conditioning systems. The indoor thermal environment exposed to solar radiation would be significantly improved by these findings.

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“…At extremely high ambient temperatures and upon sun exposure, the maximum cabin temperature can reach 90 • C [9]. When the vehicle cabin interior temperature reaches a maximum of 45 • C, some components in the vehicle may deteriorate and damage [10,11]. Driving safety may be reduced owing to the reduction of driver alertness and component reliability caused by high temperatures.…”

Section: Introduction 1environment Inside Vehicles Exposed To Solar R...mentioning

confidence: 99%

Effect of Open-Window Gaps on the Thermal Environment inside Vehicles Exposed to Solar Radiation

Ding

Zhang

et al. 2022

Energies

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To avoid a sharp rise in temperature in the cabin of parked vehicles exposed to solar radiation, experienced drivers leave some windows partly open when the vehicle is parked in the sunlight to achieve cooling through natural ventilation. However, the effectiveness of this measure to reduce the temperature under different weather conditions has not been verified. To this end, this study investigates the effect of open windows on the thermal environment of a vehicle under different environmental conditions. A field measurement, in which two identical vehicles with and without window gaps were used, was carried out in Daxing District, Beijing. The measurements were conducted for 15 days under different window gaps and ambient conditions. The results revealed that open windows resulted in a maximum temperature reduction of 6.7 °C in cabin air temperature under high temperature and high solar radiation, while only 0.6 °C can be reduced under low temperature and low solar radiation. The results also showed that when window gaps effectively reduce the air temperature, lower air temperature can be obtained with larger open-window areas.

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Effect of solar radiation on human thermal comfort in a tropical climate

Cited by 17 publications

References 15 publications

Influence of building envelope characteristics on the effectiveness of PMV-based controls for schools located in Saudi Arabia

Influence of building envelope characteristics on the effectiveness of PMV-based controls for schools located in Saudi Arabia

Application of CPMV* for improving the indoor thermal environment under global solar radiation

Effect of Open-Window Gaps on the Thermal Environment inside Vehicles Exposed to Solar Radiation

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