Insights into the thermal comfort of different naturally ventilated buildings of Darjeeling, India – Effect of gender, age and BMI

Thapa, Samar

doi:10.1016/j.enbuild.2019.04.003

Cited by 47 publications

(24 citation statements)

References 31 publications

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“…The lower clothing insulation exhibited by younger subjects could be due to a higher metabolic level in younger subjects as described in previous studies. 29,30 However, the difference in clothing insulation among different BMI groups was not statistically significant.…”

Section: Resultsmentioning

confidence: 95%

Thermal comfort in high altitude Himalayan residential houses in Darjeeling, India – An adaptive approach

Thapa¹

2019

Indoor and Built Environment

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The study of thermal comfort in buildings is required to maintain a stable and comfortable condition of the indoor environment. The climate chamber study used to determine thermal comfort is mathematically reproducible and robust, but exaggerative and hence is energy inefficient, whereas the adaptive model-based field survey method is exhaustive and bioclimatic specific. Although, several field survey-based thermal comfort studies have been reported from India, these studies were conducted mostly either in hot and humid or composite climatic condition, and very few research has been reported from cold climatic region, which lies mostly along the high altitudinal Himalayan region. In this paper, the results of field survey-based thermal comfort studies in residential houses of highly altitudinal Darjeeling Himalayan region in eastern India are presented. The study found that female subjects showed a lesser clothing cover but portrayed a higher discomfort with lower thermal sensation and higher comfort temperature. The comfort temperature as determined in this study did not comply with the ASHRAE standard 55 graphical method, and hence new comfort zone for regions with similar cold climate is proposed.

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Section: Resultsmentioning

confidence: 95%

Thermal comfort in high altitude Himalayan residential houses in Darjeeling, India – An adaptive approach

Thapa¹

2019

Indoor and Built Environment

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“…Females have a higher thermal sensitivity than males 21,33 and tend to have a greater tolerance to their surrounding thermal environment condition. 34 Ghahramani reported in a study using infrared sensing that the results of local skin temperature on human face show that females have a lower sensitivity to the perception of uncomfortably warm and uncomfortable cool. 25…”

Section: Discussionmentioning

confidence: 99%

Feasibility study to detect occupant thermal sensation using a low-cost thermal camera for indoor environments in Indonesia

Faridah

Waruwu

Wijayanto

et al. 2021

Building Services Engineering Research and Technology

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This paper concerns the feasibility study of 7 classes of thermal sensation detection in Indonesia's indoor environment using a low-cost thermal camera through face skin temperature. This study is required as an initial step to build a thermal comfort sensor system of HVAC control systems to produce a comfortable indoor environment with minimum and efficient energy use. The feasibility study was started by studying the thermoregulation system of respondents in Indonesia through measuring their body and facial skin temperatures under heating and cooling conditions, including their relationship with thermal sensations. The facial skin temperature variable, which is covered by four measurement points, namely forehead, nose, cheeks, and chin, represents the MST variable by the coefficient of determination of 0.54. The thermal sensation detection algorithm based on Artificial Neural Network (ANN) is 35.7% of accuracy. The thermal sensation questionnaire with 7 class categories is unsuitable for Indonesian respondents, and the number of the category classes predicted too much compared to the number of inputs. The detection algorithm has better accuracy with a smaller number of classes, namely 52.2% and 68.70% for the 5 and 3 classes of thermal sensation. Practical application: The air conditioning buildings system is possible to influence a thermal environmental control system to meet the occupants' thermal comfort level requirement in an indoor environment if the system is equipped with a sensor that can detect the occupants' thermal sensations. The thermal camera can be used as a non-contact sensor, detecting the occupant’s thermal sensation by reading the occupant's face skin temperature in an indoor environment.

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“…Men feel comfortable in a slightly cooler environment, whereas women prefer a warmer environment. Many authors have reported this, among them [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 87%

Adaptive gender-based thermal control system

Al-Nabulsi

Badr

2021

IJECE

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A closed loop adaptive gender-based thermal control system (AG-TCS) is designed, modelled, analysed and tested. The system has the unique feature of adapting to the surrounding environment as a function of the number of humans present and the gender ratio. The operation of the system depends on a unique interface between a radio frequency identification (RFID) device and an imaging device, both of which are correlated and interfaced to a controller. Testing of the system resulted in smooth transition and shape conversion of the response curve, which proved its adaptability. Three mathematical equations describing the internal mechanisms of the AG-TCS are presented and have been proven to optimally reflect the original statistical data covering both genders.

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Insights into the thermal comfort of different naturally ventilated buildings of Darjeeling, India – Effect of gender, age and BMI

Cited by 47 publications

References 31 publications

Thermal comfort in high altitude Himalayan residential houses in Darjeeling, India – An adaptive approach

Thermal comfort in high altitude Himalayan residential houses in Darjeeling, India – An adaptive approach

Feasibility study to detect occupant thermal sensation using a low-cost thermal camera for indoor environments in Indonesia

Adaptive gender-based thermal control system

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