scholarly journals Analysis of thermal comfort in a football stadium designed for hot and humid climates by CFD

2021 ◽  
Vol 33 ◽  
pp. 101599
Author(s):  
Gianluca Losi ◽  
Arianna Bonzanini ◽  
Andrea Aquino ◽  
Pietro Poesio
Keyword(s):  
Thermal Comfort ◽  
Hot And Humid Climates ◽  
Football Stadium

scholarly journals Analyzing Atrium Volume Designs for Hot and Humid Climates

2019 ◽  
Vol 11 (22) ◽  
pp. 6213
Author(s):  
Aram ◽  
Alibaba
Keyword(s):  
Thermal Comfort ◽  
User Satisfaction ◽  
Simulation Models ◽  
Thermal Simulation ◽  
Simulation Software ◽  
Humid Climate ◽  
High Rise ◽  
North East ◽  
Software Models ◽  
Hot And Humid Climates

The objective of this research was to determine the proper thermal comfort in an atrium design for single-floor, medium-rise, and high-rise buildings based on different proportions, placements, window opening ratios, and internal condition systems. EDSL Tas software was used for the dynamic thermal simulation software models, and all were analyzed based on ASHRAE 55, ISO 7730, and EN 15251 standards to determine which dynamic thermal simulation models had thermal comfort in a hot and humid climate throughout the year. This research found that for naturally conditioned single-floor and medium-rise buildings, when the atrium proportion was 1/2 of the office proportion at the southeast and center atrium location, respectively, had maximum user satisfaction. When the building’s internal spaces were mechanically conditioned with a 1/3 and 1/4 atrium proportion of the office proportion in single-floor and medium-rise buildings, respectively, thermal comfort was acceptable, especially when the atrium was located in the center for single-floor and in the northeast for medium-rise buildings. However, the naturally conditioned high-rise building with a north-east atrium that was 1/4 of the office proportion and a mechanically conditioned high-rise with a center atrium 1/3 of the office proportion had the minimum dissatisfaction throughout the year.

Adaptive model of thermal comfort for offices in hot and humid climates of India

2014 ◽  
Vol 74 ◽  
pp. 39-53 ◽  
Author(s):  
Madhavi Indraganti ◽  
Ryozo Ooka ◽  
Hom B. Rijal ◽  
Gail S. Brager
Keyword(s):  
Thermal Comfort ◽  
Adaptive Model ◽  
Hot And Humid Climates

Toward Efficient Residential Buildings in Hot and Humid Climates

2015 ◽  
Author(s):  
Ayesha Al Qubaisi ◽  
Ali Al Alili
Keyword(s):  
Energy Consumption ◽  
Thermal Comfort ◽  
Residential Buildings ◽  
Residential Building ◽  
Building Codes ◽  
Single Family ◽  
Unique Challenge ◽  
Hot And Humid Climates ◽  
Systems Simulation ◽  
Building Standards

The design, construction, and operation of highly efficient residential buildings in hot and humid climates represent a unique challenge for architects, contractors, and building owners. In this paper, a case study on the performance of a residential building located in hot and humid location is presented. The building is a single-family house, which is modeled as a multi-zone building. The transient systems simulation program (TRNSYS) is used to simulate the building under Abu Dhabi’s typical meteorological year conditions. The results are presented in terms of the annual energy consumption and the indoor thermal comfort. The Predicted Mean Vote (PMV) is used to model the thermal comfort. In addition, the results of applying local building codes, Estidama, and international building codes, ASHRAE 90.2 and LEED, on the building’s performance are compared. The results will help in finding the effectiveness of these building standards in reducing the energy consumption of residential building in hot and humid regions.

scholarly journals A Comparative Study of Traditional and Contemporary Building Envelope Construction Techniques in terms of Thermal Comfort and Energy Efficiency in Hot and Humid Climates

2019 ◽  
Vol 11 (13) ◽  
pp. 3582 ◽  
Author(s):  
Lotfabadi ◽  
Hançer
Keyword(s):  
Thermal Comfort ◽  
Vernacular Architecture ◽  
Building Design ◽  
Building Envelope ◽  
Point Of View ◽  
Thermal Calculation ◽  
Insulation Material ◽  
Energy Usage ◽  
Construction Techniques ◽  
Hot And Humid Climates

Expectations of traditional and contemporary buildings are different in terms of thermal comfort. Traditional buildings mostly achieve comfort through passive means, without HVAC support, but old levels of thermal satisfaction do not meet today’s expectations, although their passive thermal performances are notable for contemporary building designs. In this regard, the current study tries to investigate the possibility of comparing traditional and contemporary buildings’ construction techniques to achieve thermal comfort from an architectural point of view. In other words, is it possible to achieve passive building design by considering vernacular architecture principals as a reference? Likewise, how well can architects define insulation layers in contemporary construction surfaces in hot and humid climates? To this end, a dynamic, numerical, thermal calculation case study has been modeled in Famagusta, Northern Cyprus, to answer the above-mentioned questions. A mixed-use mode benefitting free-run periods is proposed and compared with a mode providing 24 hours of air-conditioning in different scenarios using the same initial settings. Thus, different floor-to-ceiling heights, insulation placements and indoor conditions have been tested separately in both winter and summer periods. The results show that thermal comfort can be achieved in free-run periods only during a limited percentage of the year. Furthermore, although increasing building heights may lead to a rise in the free-run periods, in contemporary buildings it increases the total energy usage of the buildings between 6% and 9% in the mixed mode. Therefore, vernacular architecture strategies are proper in their own context. However, this energy usage can still be controlled and optimized by such considerations as insulation material placement. In this regard, the best envelope properties for different building functions are proposed for application in hot and humid climates.

scholarly journals Numerical analysis of cooling potential and indoor thermal comfort with a novel hybrid radiant cooling system in hot and humid climates

2021 ◽  
pp. 1420326X2110408
Author(s):  
Jiying Liu ◽  
Moon Keun Kim ◽  
Jelena Srebric
Keyword(s):  
Thermal Comfort ◽  
Cooling System ◽  
Comfort Level ◽  
Thermal Output ◽  
Radiant Cooling ◽  
Room Condition ◽  
Hot And Humid Climates ◽  
The Mean ◽  
Radiant Temperature ◽  
Vapour Condensation

The study investigates a hybrid radiant cooling system's potential to achieve thermal comfort. The hybrid radiant cooling (HRC) system combines the best features of a typical all-air and conventional chilled radiant cooling system. An HRC system presents the advantages to (a) reduce vapour condensation and to (b) adjust the cooling output by using an Airbox convector. The three systems perceive thermal comfort in the predicted mean vote (PMV) between –0.5 and +0.5 at 25 and 27°C. In the room condition at 31°C, the all-air system has a lower thermal comfort level because the elevated airspeed is less effective when the mean radiant temperature (MRT) is low. This study suggests a cooling strategy to maximize the thermal comfort level by effectively utilizing the HRC in extreme conditions without extra cooling sources. When the designed set point indoor temperature is 25°C, the Airbox convector of the HRC fan can be off. However, if the indoor air temperature increases above 25°C, an occupant can activate the Airbox convector; the actual thermal output of HRC is increased, and the elevated airspeed can reduce the predicted percentage dissatisfied (PPD) level. Even in an extreme indoor thermal condition at 31°C, the HRC minimizes the PPD level.

A Unified Adaptive Fanger's Model for Thermal Comfort in Tropical Countries

2013 ◽  
Vol 393 ◽  
pp. 799-808 ◽  
Author(s):  
Jion Sean Pau ◽  
William K.S. Pao
Keyword(s):  
Thermal Comfort ◽  
Thermal Environment ◽  
Heat Fluxes ◽  
Air Conditioner ◽  
Adaptive Model ◽  
Humid Climate ◽  
Tropical Country ◽  
Tropical Countries ◽  
Hot And Humid Climates ◽  
Thermal Preferences

Thermal comfort, which used to be a luxury in life has transformed into a necessity in modern lives. Tropical country such as Malaysia has hot and humid climate all year round. Much air conditioning is required in tropical countries to provide thermal comfort for indoor occupants. Fangers model is deterministic as it regards the heat fluxes across the boundary between humans and their thermal environment. Fangers model is adopted by ASRHAE Standard 55 in 1992 but it has over-predicted thermal preferences of those living in tropics. Malaysians who are used to hot and humid climates prefer warmer indoor temperature, as hypothesized in adaptive model. Adaptive model is said to predict thermal comfort more accurately than Fangers model as it relates the indoor comfortable temperature to outdoor air temperature. The objective of this research is to integrate the adaptive theories into Fangers model and to synthesize a new thermal comfort model which is expected to accurately predict thermal comfort in tropical countries. As the adaptive theory says that not all peoples thermal preferences are affected by thermal histories and contextual factors, the new model has proposed a broader operation range of PMV for air conditioner. The increment of PMV range from ±1.0 to ±1.17 for 80% satisfaction requirement is proved to applicable in Malaysia.

Analysis of the Influence of Age on Human Thermal Comfort

ICCREM 2020 ◽  
2020 ◽  
Author(s):  
Boshuai Dong ◽  
Chunjing Shang ◽  
Ming Tong ◽  
Jianhong Cai
Keyword(s):  
Thermal Comfort ◽  
Human Thermal Comfort
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