Thermal comfort in proposed three-storey passive houses for warm humid climates

Jayasinghe, Mtr; Attalage, RA; Jayawardena, AI

doi:10.1016/s0973-0826(08)60300-2

Cited by 7 publications

(3 citation statements)

References 3 publications

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“…are associated with reversal in the direction of heat transmission, i.e., the roof temperature is higher than the external temperature. Various DTS studies that have been carried out on houses in tropical regions have shown that the roof is a key area of concern in terms of thermal performance [23,24,30,45,46]. The roof is continually exposed to high levels of solar radiation and materials used in roof construction tend to have low thermal storage and low thermal resistance properties.…”

Section: Influence Of Roof On Thermal Performancementioning

confidence: 99%

“…The distinct nature of the Thai climate means that housing design in these regions needs to incorporate strategies that exploit the benefits from the outdoor climate to achieve thermal comfort inside [24]. Passive design strategies have been proposed as an adequate method to achieve optimum indoor environmental conditions in residential buildings and thus reduce energy consumption in numerous tropical regions.…”

Section: Introductionmentioning

confidence: 99%

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Improving Thermal Comfort of Low-Income Housing in Thailand through Passive Design Strategies

2017

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Abstract:In Thailand, the delivery of adequate low-income housing has historically been overshadowed by politics with cost and quantity being prioritised over quality, comfort and resilience. In a country that experiences hot and humid temperatures throughout the year, buildings need to be adaptable to the climate to improve the thermal comfort of inhabitants. This research is focused on identifying areas for improving the thermal performance of these housing designs. Firstly, dynamic thermal simulations were run on a baseline model using the adaptive thermal comfort model CIBSE TM52 for assessment. The three criteria defined in CIBSE TM52 were used to assess the frequency and severity of overheating in the buildings. The internal temperature of the apartments was shown to exceed the thermal comfort threshold for these criteria throughout the year. The internal operating daily temperatures of the apartment remain high, ranging from a maximum of 38.5 • C to a minimum of 27.3 • C. Based on these findings, five criteria were selected to be analysed for sensitivity to obtain the key parameters that influence the thermal performance and to suggest possible areas for improvement. The computer software package Integrated Environmental Solutions-Virtual Environment (IES-VE) was used to perform building energy simulations. Once the baseline conditions were identified, the software packages SimLab2.2 and RStudio were used to carry out the sensitivity analysis. These results indicated that roof material and the presence of a balcony have the greatest influence on the system. Incorporating insulation into the roof reduced the mean number of days of overheating by 21.43%. Removing the balcony increased the number of days of overheating by 19.94% due to significant reductions in internal ventilation.

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Section: Influence Of Roof On Thermal Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improving Thermal Comfort of Low-Income Housing in Thailand through Passive Design Strategies

2017

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“…Due to the tropical nature of Sri Lanka, the occupants could withstand higher temperatures and be comfortable, but they feel discomfort even at 24 °C. neutral temperature is 26 o C at the low altitude of Sri Lanka [21]. Furthermore, the yearly average CDD has been estimated for setpoint temperatures of 22°C, 24°C, 26°C, and 28°C using ASHRAE, Erb's, Hitchin's, Schoenau, and Kehring's UKMO methods.…”

Section: Cooling Degree Daysmentioning

confidence: 99%

Improving Sri Lankan Buildings' Energy Efficiency Through Bioclimatic Classification and Potential Assessment

2023

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As a result of lifestyle changes, the energy requirement for thermal comfort has increased. To increase energy efficiency and reduce global warming, building design should consider the climate. An energy-efficient building code has been developed with the goal of reducing energy demand by 25%–40%. However, the code cannot be used because different stakeholders have different perspectives. Climate zones, which are required for building structures that are both energy-efficient and climate-responsive, do not exist in the country. From 1989 to 2019, hourly weather data has been collected for district headquarters. This research focuses on the bioclimatic classification of Sri Lankan buildings and passive design methods. Degree days have been calculated for various base temperatures using Hitchin's, Erb's, Schoenau and Kehring's, ASHRAE, UKMO, and Hourly methods. The degree-day maps for Sri Lanka were created using ArcGIS. The bioclimatic classification for Sri Lanka was developed by combining climate and degree-day data. Sri Lanka is divided into three bioclimatic zones: cold, hot, and intermediate. The design potential of each bioclimatic zone was calculated using BcChart V2.0. Natural ventilation is an effective passive design technique for increasing indoor comfort. In the cold, hot, and intermediate zones, its potential is 72%, 62%, and 80%, respectively.

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A study on the feasibility of a new roof slab insulation system in tropical climatic conditions

Nandapala

Chandra

Halwatura

2020

Energy and Buildings

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Thermal comfort in proposed three-storey passive houses for warm humid climates

Cited by 7 publications

References 3 publications

Improving Thermal Comfort of Low-Income Housing in Thailand through Passive Design Strategies

Improving Thermal Comfort of Low-Income Housing in Thailand through Passive Design Strategies

Improving Sri Lankan Buildings' Energy Efficiency Through Bioclimatic Classification and Potential Assessment

A study on the feasibility of a new roof slab insulation system in tropical climatic conditions

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