scholarly journals Ambient thermal comfort analysis for four major cities in Thailand, Cambodia, and Laos: Variability, trend, factor attribution, and large-scale climatic influence

ScienceAsia ◽  
2021 ◽  
Vol 47 (5) ◽  
pp. 618
Author(s):  
Kimhong Chea ◽  
Kasemsan Manomaiphiboon ◽  
Nishit Aman ◽  
Sirichai Thepa ◽  
Agapol Junpen ◽  
...  
Keyword(s):  
Thermal Comfort ◽  
Large Scale ◽  
Climatic Influence

scholarly journals 1. On the Thermal Influence of Forests

1875 ◽  
Vol 8 ◽  
pp. 114-125
Author(s):  
Robert Louis Stevenson
Keyword(s):  
Large Scale ◽  
Climatic Influence ◽  
Thermal Influence

The opportunity of an experiment on a comparatively large scale, and under conditions of comparative isolation, can occur but rarely in such a science as Meteorology. Hence Mr Milne Home's proposal for the plantation of Malta seemed to offer an exceptional opportunity for progress. Many of the conditions are favourable to the simplicity of the result; and it seemed natural that, if a searching and systematic series of observations were to be immediately set afoot, and continued during the course of the plantation and the growth of the wood, some light would be thrown on the still doubtful question of the climatic influence of forests.

scholarly journals The Cooling Effect of Large-Scale Urban Parks on Surrounding Area Thermal Comfort

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3904 ◽  
Author(s):  
Farshid Aram ◽  
Ebrahim Solgi ◽  
Ester Higueras García ◽  
Amir Mosavi ◽  
Annamária R. Várkonyi-Kóczy
Keyword(s):  
Thermal Comfort ◽  
Large Scale ◽  
Urban Parks ◽  
Cooling Effect ◽  
Urban Park ◽  
P Value ◽  
Cognitive State ◽  
Physiological Equivalent Temperature ◽  
Air Temperatures ◽  
Cooling Effects

This empirical study investigates large urban park cooling effects on the thermal comfort of occupants in the vicinity of the main central park, located in Madrid, Spain. Data were gathered during hot summer days, using mobile observations and a questionnaire. The results showed that the cooling effect of this urban park of 125 ha area at a distance of 150 m could reduce air temperatures by an average of 0.63 °C and 1.28 °C for distances of 380 m and 665 meters from the park. Moreover, the degree of the physiological equivalent temperature (PET) index at a distance of 150 meters from the park is on average 2 °C PET and 2.3 °C PET less compared to distances of 380 m and 665 m, respectively. Considering the distance from the park, the correlation between occupant perceived thermal comfort (PTC) and PET is inverse. That is, augmenting the distance from the park increases PET, while the extent of PTC reduces accordingly. The correlation between these two factors at the nearest and furthest distances from the park is meaningful (p-value < 0.05). The results also showed that large-scale urban parks generally play a significant part in creating a cognitive state of high-perceived thermal comfort spaces for residents.

scholarly journals Energy Efficiency of a Vernacular Building Design and Materials in Hot Arid Climate: Experimental and Numerical Approach

2021 ◽  
Vol 10 (3) ◽  
pp. 481-494
Author(s):  
Karima El Azhary ◽  
Mohamed Ouakarrouch ◽  
Najma Laaroussi ◽  
Mohammed Garoum
Keyword(s):  
Thermal Comfort ◽  
Energy Efficient ◽  
Large Scale ◽  
Research Study ◽  
Experimental Testing ◽  
Vernacular Architecture ◽  
Weather Conditions ◽  
Building Design ◽  
Numerical Approach ◽  
Coating Materials

Morocco faces tremendous climate constraints; the climate is hot and dry in most parts of the country, and when selecting an energy-saving approach, the architectural landscape becomes essential.Designer and building professionals seem to have neglected this large-scale integration. Sustainable development programs in terms of sustainable architecture are ongoing in countries around the world. One part of this trend is the growing concern shown in the high environmental efficiency of vernacular architecture. It is within this prescriptive framework that this research study is being conducted, which reveals novel architectural style integrating thermal comfort, energy efficient characteristics, passive solar elements architecture, and construction techniques inspired from the vernacular Ksourian architectural configurations. The goal of the present research study is to identify features of energy efficient vernacular architecture and thermal performances that affect indoor thermal comfort conditions for adaptation to current lifestyles in modern architecture. The key characteristics developed are; built mass structure, building orientation, space planning, availability of s, building techniques, and new coating materials for manufacturing and roofing. The suggested methodology enables to analyze the thermal performance analysis, applying an experimental research using experimental testing measurement and comparative optimization processes for thermal efficiency and comfort evaluation of a traditional vernacular earthen house.Series of experimental thermophysical characterization measurements have been carried out in order to quantify on a real scale the thermophysical properties that characterize the Rissani earth. Thusthermophysical characterization results are operated as input data for the thermal dynamic simulation for the purpose to evaluate thermal performances and comfort under the weather conditions and control natural comfort in both summer and winter, without using heating or cooling systems. Ultimately, the simulations carried out make it possible to identify the optimal orientation, revealing an effective decrease in interior temperatures during summer and providing good thermal comfort in winter.

Dynamic evaluation of thermal comfort scenarios in a Colombian large-scale social housing project

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Alvaro Garay ◽  
Angie Ruiz ◽  
Jose Guevara
Keyword(s):  
Thermal Comfort ◽  
Low Income ◽  
Social Housing ◽  
Large Scale ◽  
Simulation Models ◽  
Housing Project ◽  
Content Type ◽  
Support Tool ◽  
Heating Systems ◽  
Viable Solution

PurposeThis study aims to analyze the technical, environmental, economic and thermal comfort impacts of implementing passive measures and heating systems in Ciudad Verde, a large-scale social housing project located at the periphery of Bogota, Colombia.Design/methodology/approachA system dynamics (SD) model is proposed to evaluate scenarios through counterfactual experiments, including technical, environmental and economic components. Model inputs are obtained from building energy simulation models and data collected from official reports, public policy documents and construction records.FindingsResults suggest that the use of heating systems is the best choice to achieve thermal comfort conditions throughout the day. However, both the capital expenditures and CO2 emissions associated with such system make their adoption very difficult. In line with that, the use of heating systems in combination with passive measures stands out as a viable solution since their costs are affordable and their use contributes to reducing CO2 emissions.Originality/valueThe proposed model recreates the dynamics underlying social housing construction processes, the adoption of heating systems and passive measures in low-income dwellings and their corresponding impact on CO2 emissions and indoor thermal comfort conditions. The model can be employed as a support tool in the formulation of social housing policies associated with thermal comfort specifications. In this way, the model represents a first step toward incorporating thermal-related variables into the decision-making processes related to social housing planning and development.

scholarly journals Impact of Orientation on the Thermal Performances in Vernacular Buildings in Hot Arid Climate

2019 ◽  
Vol 9 (2) ◽  
pp. 4840-4847
Keyword(s):  
Thermal Comfort ◽  
Large Scale ◽  
Cooling System ◽  
Vernacular Architecture ◽  
Climatic Conditions ◽  
Point Of View ◽  
Occupant Comfort ◽  
Vernacular Buildings ◽  
Scale Integration ◽  
The Impact

Morocco faces enormous climatic constraints. A large part of the national territory has a hot and dry climate, hence the importance of the climate aspect in the choice of an energy saving strategy. The use of reinterpreted, decontextualized, totally or partially vernacular architectural techniques and/or forms is visible at different levels in the Maghreb countries. The large-scale integration of this aspect seems to be ignored by the designers. The objective of this research is to evaluate the impact of the building orientation and vernacular architecture towards the occupant comfort, in order to meet its energy and comfort needs at a lower cost on one hand, and on the other hand, to design more efficient collective buildings from a thermal and energy point of view. The proposed methodology allows examining the thermal performances of a traditional building under the climatic conditions of the city of Rissani in order to naturally control comfort summer and winter, in addition to ensure a good thermal comfort without using any heating or cooling system. Finally, the simulations carried out lead to the identification of the optimal orientation that demonstrates an effective reduction in indoor temperatures and a decrease in the large daily fluctuations in these temperatures. The research focuses on the influence of the orientation of a building's facades in relation to the solar radiation and on providing the necessary thermal comfort.

scholarly journals Heating Performances of a Large-Scale Factory Evaluated through Thermal Comfort and Building Energy Consumption

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5617
Author(s):  
Daehyun Kim ◽  
Hyunmuk Lim ◽  
Jongmin Moon ◽  
Jinsoo Park ◽  
Gwanghoon Rhee
Keyword(s):  
Energy Consumption ◽  
Thermal Comfort ◽  
Energy Flow ◽  
Large Scale ◽  
Building Energy ◽  
Large Area ◽  
Heating Performance ◽  
Ceiling Height ◽  
Computational Fluid Dynamics Cfd ◽  
Heating Energy Consumption

Workshops with a large area and a high ceiling height without compartments, such as large-scale assembly factories, have an uneven thermal comfort during heating, making it difficult to establish an effective heating strategy. In this study, we evaluate the heating performance of a large-scale factory based on thermal comfort and energy flow and discuss effective heating methods. In addition, an analysis of the heating performance of a large-scale factory is attempted for the first time. To analyze the heating performance, computational fluid dynamics (CFD) and building energy simulation (BES) were used to confirm thermal comfort distribution and energy flow in a large-scale factory. Temperature distribution and thermal comfort were evaluated through CFD, and the temperature of a large-scale assembly factory was compared with experimental data. Based on the CFD results, the current heating level of large factories was predicted to be 15.4 °C, and the ADPIrev was 70%. Moreover, the BES results show that the energy losses due to forced ventilation and the inflow of outside air contributed 35.5% and 27.8%, respectively. The heating strategy proposed in this study could improve thermal comfort by 79% compared to the same energy consumption. Therefore, to improve the heating performance compared to the heating energy consumption of large-scale factory, the imbalance in thermal comfort caused by the inflow of outside air must be resolved.

scholarly journals Melting n-eicosane in scaled-up model of capsule for use in hot climate thermal-comfort garments

2019 ◽  
Vol 213 ◽  
pp. 02086
Author(s):  
Václav Tesař ◽  
Jozef Kordík
Keyword(s):  
Body Temperature ◽  
Thermal Comfort ◽  
Human Body ◽  
Large Scale ◽  
Initial Temperature ◽  
Melting Process ◽  
Cold Desert ◽  
Hot Climate ◽  
Human Body Temperature ◽  
Spherical Capsule

Recent ideas in development of garments for thermal comfort in desert climates concentrate on textile containing small capsules filled with material melting to store latent heat at roughly human body temperature. This cools the garment wearer during the hot day and later keeps him warm in the cold desert night. This article investigates the melting process in a single scaled up model of spherical capsule filled with n-eicosane – a material melting at Tm = 35.7 ˚C. In the experiment, the capsule model was heated starting from the initial temperature 30˚C by warm water at 50.4 ˚C. The large scale of the model made possible study of details of the melting process.

scholarly journals A Field Investigation on Adaptive Thermal Comfort in an Urban Environment Considering Individuals’ Psychological and Physiological Behaviors in a Cold-Winter of Wuhan

2021 ◽  
Vol 13 (2) ◽  
pp. 678
Author(s):  
Mehdi Makvandi ◽  
Xilin Zhou ◽  
Chuancheng Li ◽  
Qinli Deng
Keyword(s):  
Thermal Comfort ◽  
Large Scale ◽  
Thermal Sensation ◽  
Field Investigation ◽  
Outdoor Thermal Comfort ◽  
Sustainable Urban Development ◽  
Physical Factors ◽  
Cold Winter ◽  
Physiological Equivalent Temperature ◽  
Clothing Insulation

To date, studies of outdoor thermal comfort (OTC) have focused primarily on physical factors, tending to overlook the relevance of individual adaptation to microclimate parameters through psychological and physiological behaviors. These adaptations can significantly affect the use of urban and outdoor spaces. The study presented here investigated these issues, with a view to aiding sustainable urban development. Measurements of OTC were taken at a university campus and in urban spaces. Simultaneously, a large-scale survey of thermal adaptability was conducted. Two groups were selected for investigation in a cold-winter-and-hot-summer (CWHS) region; respondents came from humid subtropical (Cfa) and hot desert (BWh) climates, according to the Köppen Climate Classification (KCC). Results showed that: (1) neutral physiological equivalent temperature (NPET) and preferred PET for people from the Cfa (PCfa) and BWh (PBWh) groups could be obtained with KCC; (2) PCfa adaptability behaviors were, subjectively, more adjustable than PBWh; (3) Clothing affected neutral temperature (NT), where NT reduced by approximately 0.5 °C when clothing insulation rose 0.1 Clo; and (4) Gender barely affected thermal acceptance vote (TAV) or thermal comfort vote (TCV) and there was a substantial relationship between thermal sensation, NT, and PET. These findings suggest ‘feels like’ temperature and comfort may be adjusted via relationships between microclimate parameters.

scholarly journals Study on Design and Simulation of Temperature Control System

2021 ◽  
Vol 2 (1) ◽  
pp. 1-4
Author(s):  
Rahul Yadav ◽  
◽  
Kamlesh Kumar Singh
Keyword(s):  
Control System ◽  
Thermal Comfort ◽  
Temperature Control ◽  
Large Scale ◽  
Thermal Environment ◽  
Research Work ◽  
The Body ◽  
Temperature Control System ◽  
Small Scale ◽  
Production Plant

Temperature control system is nothing but a complicated process which is aimed to maintain the temperature in a particular defined area to a certain maxima or minima level or say defined in a range which is quite certain. We can witness this process commonly used in many parts of the India and many other countries. In recent times, we are witnessing a rapid growth in industries at global level which has led to globalization and industrialization which further has led the necessary use of the temperature control system and its application in these industries at day-to-day level in manufacturing and maintenance with the increase in the greenhouse effect and depletion of ozone layer. Many factories both at small scale as well as at large scale always maintain a certain area or say a section of operation in their infrastructure that must maintain a range of temperature for process to work successfully. The laboratories of research uncertainly sometimes lack in the use of temperature control system which has further necessitated the use of large chambers of different sizes to perform specific temperature related re-search work which further led to the increase in the cost of research work. In certain specific areas there are lot of electronic activities happening or some machinery function like in the server rooms or the area where production plant is, so basically these places work constantly for 24hrs and during the whole day the temperature has to be monitored precisely and frequently so that it can be ensured that the temperature do not instantly rise or fall below the marked temperature which may lead to the acceleration of wearing and tearing of whole system. Living rooms, hospitals, malls, aircrafts etc., are also one of the most important places where monitoring of temperature is required so as to ensure that the thermal comfort is ensured, and thermal comfort here means that the state of mind which feels satisfied with the temperature in the present environment. This is important because if there will be any dissatisfaction with the thermal environment then it can cause the body to be too warm or too by unwanted heating and unwanted cooling of the equipment may further lead to the functional disbalance.

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