Thermal Adaptation Outdoors and the Effect of Wind on Thermal Comfort

2011 ◽  
pp. 33-58 ◽  
Author(s):  
Hom Bahadur Rijal
Keyword(s):  
Thermal Comfort ◽  
Thermal Adaptation

scholarly journals Spatial and Behavioral Thermal Adaptation in Net Zero Energy Buildings: An Exploratory Investigation

2020 ◽  
Vol 12 (19) ◽  
pp. 7961 ◽  
Author(s):  
Shady Attia
Keyword(s):  
Energy Efficiency ◽  
Thermal Comfort ◽  
Energy Use ◽  
Thermal Adaptation ◽  
Building Energy ◽  
Building Energy Efficiency ◽  
Zero Energy ◽  
Net Zero Energy ◽  
Net Zero ◽  
Energy Efficiency Standards

Climate responsive design can amplify the positive environmental effects necessary for human habitation and constructively engage and reduce the energy use of existing buildings. This paper aims to assess the role of the thermal adaptation design strategy on thermal comfort perception, occupant behavior, and building energy use in twelve high-performance Belgian households. Thermal adaptation involves thermal zoning and behavioral adaptation to achieve thermal comfort and reduce energy use in homes. Based on quantitative and qualitative fieldwork and in-depth interviews conducted in Brussels, the paper provides insights on the impact of using mechanical systems in twelve newly renovated nearly- and net-zero energy households. The article calls for embracing thermal adaptation as a crucial design principle in future energy efficiency standards and codes. Results confirm the rebound effect in nearly zero energy buildings and the limitation of the current building energy efficiency standards. The paper offers a fresh perspective to the field of building energy efficiency that will appeal to researchers and architects, as well as policymakers.

Effect of thermal adaptation on seasonal outdoor thermal comfort

2011 ◽  
Vol 31 (2) ◽  
pp. 302-312 ◽  
Author(s):  
Tzu-Ping Lin ◽  
Richard de Dear ◽  
Ruey-Lung Hwang
Keyword(s):  
Thermal Comfort ◽  
Thermal Adaptation ◽  
Outdoor Thermal Comfort

scholarly journals Daylight affects human thermal perception

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Giorgia Chinazzo ◽  
Jan Wienold ◽  
Marilyne Andersen
Keyword(s):  
Thermal Comfort ◽  
Thermal Environment ◽  
Thermal Adaptation ◽  
Indoor Environments ◽  
Thermal Perception ◽  
Factors Affecting ◽  
Low Energy Buildings ◽  
Temperature Levels ◽  
Factor Interactions ◽  
Adaptation Processes

Abstract Understanding the factors that affect human thermal responses is necessary to properly design and operate low-energy buildings. It has been suggested that factors not related to the thermal environment can affect thermal responses of occupants, but these factors have not been integrated in thermal comfort models due to a lack of knowledge of indoor factor interactions. While some studies have investigated the effect of electric light on thermal responses, no study exists on the effect of daylight. This study presents the first controlled experimental investigation on the effect of daylight quantity on thermal responses, combining three levels of daylight illuminance (low ~130 lx, medium ~600 lx, and high ~1400 lx) with three temperature levels (19, 23, 27 °C). Subjective and objective thermal responses of 84 participants were collected through subjective ratings on thermal perception and physiological measurements, respectively. Results indicate that the quantity of daylight influences the thermal perception of people specifically resulting in a cross-modal effect, with a low daylight illuminance leading to a less comfortable and less acceptable thermal environment in cold conditions and to a more comfortable one in warm conditions. No effect on their physiological responses was observed. Moreover, it is hypothesised that a warm thermal environment could be tolerated more whenever daylight is present in the room, as compared to the same thermal condition in a room lit with electric lights. Findings further the understanding of factors affecting human thermal responses and thermal adaptation processes in indoor environments and are relevant for both research and practice. The findings suggest that daylight should be considered as a factor in thermal comfort models and in all thermal comfort investigations, as well as that thermal and daylight illuminance conditions should be tuned and changed through the operation and design strategy of the building to guarantee its occupants’ thermal comfort in existing and future structures.

scholarly journals Thermal comfort environment for migrants: a long-term follow-up climate chamber experiment

2021 ◽  
Vol 2069 (1) ◽  
pp. 012237
Author(s):  
Yu Dong ◽  
Yuan Shi ◽  
Yanfeng Liu ◽  
Jørn Toftum
Keyword(s):  
Thermal Comfort ◽  
Thermal Environment ◽  
Thermal Sensation ◽  
Thermal Sensitivity ◽  
Thermal Adaptation ◽  
Indoor Climate ◽  
Climate Chamber ◽  
Chamber Experiment ◽  
Long Term Follow Up

Abstract Migration between different climate regions may change people’s thermal experience and their thermal adaptation. However, few studies have explored the thermal adaptation process and the suitable indoor thermal environment of migrants. In this study, we conducted a long-term tracking comparative experiment on thermal adaptation of migrants moving from severe cold (SC) regions, hot summer and cold winter (HSCW) regions, and hot summer and warm winter (HSWW) regions to cold region of China. A two-year climate chamber experiment was conducted to follow migrants’ progressive thermal adaptation, such as different weeks, months and seasons after they migrated. The results show that the thermal sensation of migrants was significantly associated with their origin, the time after migration and air temperature. In addition, with the increase time after migration, the thermal sensitivity of HSCW and SC migrants showed a significant upward and downward trend, respectively. Two years after migration, the thermal comfort limits of migrants from SC, HSWW and HSCW were almost identical at 23.5-27.8°C, 23.8-27.8°C, and 23.5-27.6°C. The results provides insight to the progression of thermal adaptation and helpful to guide the design of indoor climate for immigrants with different thermal experiences.

scholarly journals A Behavioural Analysis of Outdoor Thermal Comfort: A Comparative Analysis between Formal and Informal Shading Practices in Urban Sites

2020 ◽  
Vol 12 (21) ◽  
pp. 9032 ◽  
Author(s):  
Mohamed H. Elnabawi ◽  
Neveen Hamza
Keyword(s):  
Thermal Comfort ◽  
Thermal Adaptation ◽  
Environmental Parameters ◽  
Outdoor Thermal Comfort ◽  
Dominant Factor ◽  
Structured Interviews ◽  
Conservation Areas ◽  
Solar Radiation Intensity ◽  
Local Practices ◽  
Cultural Constraints

This study calls for the integration of context-based socio-cultural habits and learning from local practices in providing outdoor thermal comfort in conservation areas. These parameters have direct impacts on outdoor activities, especially in hot arid climates. The study took place in two nearby locations one renovated and all external shadings removed to provide visual vistas to monuments while on the same street, no more than 1500 m apart, local shading practices were left in places. Sun-exposed as opposed to shaded sites were compared for subjective thermal comfort and outdoor activity, via structured interviews, observations, and wide-ranging micrometeorological measurements. The aim was to investigate psychological factors, including overall thermal comfort and perception, in addition to environmental parameters, such as solar radiation intensity and thermal adaptation. The analysis illustrates the importance of shading as a dominant factor in achieving thermal comfort on the urban scale, with a neutral temperature in summer of 29.9 °C and 29.2 °C for shaded and sun-exposed locations, respectively. The results suggest people may be more willing to tolerate higher temperatures in shaded rather than sun-exposed locations. Moreover, cultural constraints and context-based behaviour proved to have some influences on people’s levels of adaptation and their thermal behaviour.

scholarly journals Medium Term Thermal Comfort of College Dormitories in Western Cold Region

2020 ◽  
Vol 4 (10) ◽  
Author(s):  
Meng Wang ◽  
Yi Xie ◽  
Zihe Zhang
Keyword(s):  
Thermal Comfort ◽  
Thermal Sensation ◽  
Operating Temperature ◽  
Thermal Adaptation ◽  
Cold Region ◽  
Medium Term ◽  
The West ◽  
Male And Female ◽  
Acceptable Range ◽  
Middle Period

During the middle period of heating in winter, the author studied the characteristics of thermal comfort and thermal adaptation of 4 dormitories of a college in the west. At the same time, a questionnaire on subjective thermal sensation was conducted, and 500 questionnaires were distributed to the subjects. Finally, 462 valid questionnaires were obtained.Through the study of data, the function of real average thermal sensation and indoor operating temperature has been obtained. The results show that the thermal neutral temperature is 19.8 degrees, the male and female thermal neutral temperatures are 19.5 and 20.1 degrees respectively, and the acceptable ranges of 80% and 90% for males are 16.5℃—23.0℃、17.7℃—21.3℃.The acceptable range of 80% and 90% for females is 16.2℃—24.0℃，17.8℃—22.4℃ .

scholarly journals Adaptive Outdoor Thermal Comfort at an Urban Park in Malaysia

2018 ◽  
Vol 3 (9) ◽  
pp. 13 ◽  
Author(s):  
Rabiatul Adawiyah Nasir ◽  
Sabarinah Sh Ahmad ◽  
Azni Zain-Ahmed
Keyword(s):  
Thermal Comfort ◽  
Publishing House ◽  
Thermal Adaptation ◽  
Outdoor Thermal Comfort ◽  
Urban Park ◽  
Personal Factors ◽  
Structured Interviews ◽  
Humid Condition ◽  
Adaptive Mechanisms ◽  
International Publishing

This paper clarifies the perceptive and adaptive mechanisms involved in an outdoor thermal comfort in hot, and humid condition. The method of the study was through microclimate measurement coupled with structured interviews of urban park users. The objective of this study is to identify the impacts of weather and personal factors on respondents’ perceptual and sensation estimations. The findings on the significant influences of microclimate parameters and personal factors on the participants’ perceptions of outdoor urban places are discussed. This study shows the respondents' thermal adaptation from physiological and psychological perspectives. The significance of the findings showed the importance of a sustainable urban park for continued use by future communities.Keywords: Outdoor Thermal Comfort; Urban Park; Microclimate; Hot and HumideISSN 2398-4295 © 2018. The Authors. Published for AMER ABRA cE-Bs by e-International Publishing House, Ltd., UK. This is an open-access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer–review under responsibility of AMER (Association of Malaysian Environment-Behaviour Researchers), ABRA (Association of Behavioural Researchers on Asians) and cE-Bs (Centre for Environment-Behaviour Studies), Faculty of Architecture, Planning & Surveying, Universiti Teknologi MARA, Malaysia.

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