The Thermal Performance Exploration of Outdoor and Indoor Spaces Using IES & ENVI-met

2017 ◽  
Keyword(s):  
Thermal Performance ◽  
Indoor Spaces

scholarly journals Specification of Glazings for Façades Based on Spectrophotometric Characterization of Transmittance

2021 ◽  
Vol 13 (10) ◽  
pp. 5437
Author(s):  
Helenice Maria Sacht ◽  
Luís Bragança ◽  
Manuela Almeida ◽  
Rosana Caram
Keyword(s):  
Heat Transfer ◽  
Optical Properties ◽  
Energy Consumption ◽  
Heat Exchange ◽  
Thermal Performance ◽  
Near Infrared ◽  
Temperate Climate ◽  
Solar Control ◽  
Indoor Spaces

The correct specification of glazings for façades can reduce the energy consumption in buildings. The heat exchange occurs through transparent surfaces and radiation reaches the building as light and heat. Therefore, glazings significantly contribute to the heat transfer between outdoor and indoor spaces and act directly on daylighting and thermal comfort. This paper reports on the spectrophotometric characterization of glazings transmittance for the study of components of a modular façade system and its suitability for the climate of Portugal (temperate climate). The study focused on results of spectrophotometric measurements of optical properties, specifically the transmittance of some types of glazings (solar control, self-cleaning, low-e, float, and extra-clear) and two types of double glazings. The results show the percentage of transmission to ultraviolet, visible, and near-infrared regions and its importance, which enabled the analysis of the glazing efficiency regarding daylighting and the correlation to thermal performance. Subsidies and indications for the specification and adequate uses of transparent surfaces have been presented and complemented the datasheets available from the manufactures.

scholarly journals Hybrid system strategy on double skin façade to optimize thermal performance on research building

2021 ◽  
Vol 881 (1) ◽  
pp. 012048
Author(s):  
Abdul Hakim Abdul Majid ◽  
Azhar Ghazali
Keyword(s):  
Solar Radiation ◽  
Latent Heat ◽  
Thermal Performance ◽  
Spatial Diversity ◽  
Curtain Wall ◽  
Heat Gain ◽  
Solar Heat ◽  
Double Skin ◽  
Solar Heat Gain ◽  
Indoor Spaces

Abstract One of the most efficient methods to optimize thermal performance in a building is the practical design of the façade. The double skin façade‘(DSF) is a crucial decision for handling the interaction between outdoor and indoor spaces. It also offers some spatial diversity in the design process. Recently, a lot of focus has been paid to it instead of the more traditionally glazed curtain wall. This is because of its potential to reduce energy effectively, achieve thermal comfort in the building, and save costs. The indoor spaces near to the glazed facades will become warm due to high incidence solar radiation on the East-West facades in Malaysia’s tropical environment. In the tropics, one of the solar heat gain reduction approaches is the use of double skin-facade (DSF). One of the fundamental components of the double-skin facade is the blinds. Blinds located in the cavity of the double-skinned facade and buffer the building from solar heat gain or perform the role of a pre-heater for ventilation air. In general, the temperature of the blinds is high, which is helpful in the cold period but problematic in the hot period. To minimize the cooling loads of the building, technological innovations for the shading system are considered. Plants can dissipate absorbed solar radiation into resistant and latent heat. Plants turn radiation into the latent heat. This paper aims to study the effectiveness of a double skin façade and explore improved innovative design for a double-skin façade design integrated with vertical green on research building to optimize thermal performance. This paper will collect data of the thermal performance of double skin façade, precedent study and run simulation analysis to achieve the aim of the paper.

scholarly journals Numerical Investigation of the Influence of Vegetation on the Aero-Thermal Performance of Buildings with Courtyards in Hot Climates

Energies ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5388
Author(s):  
Hao Sun ◽  
Carlos Jimenez-Bescos ◽  
Murtaza Mohammadi ◽  
Fangliang Zhong ◽  
John Kaiser Calautit
Keyword(s):  
Thermal Comfort ◽  
Thermal Performance ◽  
Natural Ventilation ◽  
Spatial Configuration ◽  
Environmental Parameters ◽  
Comfort Levels ◽  
Indoor Comfort ◽  
The Impact ◽  
Indoor Spaces ◽  
Good Agreement

Natural ventilation is an energy-efficient way to provide fresh air and enhance indoor comfort levels. The wind-driven natural ventilation in courtyards has been investigated by many researchers, particularly the influence of the spatial configuration and environmental parameters on the ventilation and thermal comfort performance. However, previous research has mainly focused on the courtyard region instead of the indoor spaces surrounding it. Additionally, as a microclimate regulator, courtyards are rarely assessed in terms of the impact of vegetation, including its impact on energy consumption and thermal comfort. Evapotranspiration from vegetation can help lower air temperature in the surrounding environment and, therefore, its influence on the ventilation and thermal comfort in buildings with courtyards should be evaluated. The present study investigates the impact of vegetation on the aero-thermal comfort conditions in a courtyard and surrounding buildings in hot climates. Computational fluid dynamics was employed to evaluate the aero-thermal comfort conditions of the courtyard and surrounding buildings with different configurations of vegetation. The modeling was validated using previous works’ experimental data, and good agreement was observed. Thermal comfort indices were used to assess thermal performance. The study also evaluated the cover, height and planting area of vegetation in the courtyard. The results of this study can help develop tools that can assist the addition of vegetation in courtyards to maximize their effects. Future works will focus on looking at the influence of the strategies on different designs and layouts of courtyards.

The Impact of Passive Design on Building Thermal Performance in Hot and Dry Climate

2012 ◽  
Vol 37 (3) ◽  
pp. 81-91
Author(s):  
Emad S. Mushtaha ◽  
Taro Mori ◽  
Enai Masamichi
Keyword(s):  
Thermal Performance ◽  
Natural Ventilation ◽  
Integrated Design ◽  
Solar Panels ◽  
Basic Principles ◽  
New Development ◽  
Passive Design ◽  
Shading Devices ◽  
The Impact ◽  
Indoor Spaces

Several calls have been everywhere asking for proper use of passive design tools like shading devices, insulation, natural ventilation and solar panels in building architecture of hot-dry area in order to improve the thermal performance of indoor spaces. This paper examines the effect of these passive tools on indoor thermal performance which in turn helps arrange thermal priorities properly. Herein, basic principles of Successive Integration Method (SIM) have been utilized for an integrated design of two floors with small openings integrated with floor cooling, solar panels, natural ventilation, shading devices, and insulation. As a result, create priorities of passive tools that are structured consequently for ventilation, insulation, solar panels, and shading devices. This structure could guide designers and builders to set their priorities for the new development of building construction.

Impacts of Courtyard Geometrical Configurations on Energy Performance of Buildings

2019 ◽  
Vol 4 (10) ◽  
pp. 29
Author(s):  
Abdulbasit Almhafdy ◽  
Norhati Ibrahim ◽  
Sabarinah Sh Ahmad
Keyword(s):  
Energy Consumption ◽  
Thermal Performance ◽  
Architectural Design ◽  
Publishing House ◽  
Energy Performance ◽  
Design Element ◽  
Humid Climate ◽  
Simulation Tools ◽  
International Publishing ◽  
Indoor Spaces

The courtyard is an architectural design element often regarded as microclimate modifiers. It has the potential of improving comfort conditions within the outdoor courtyard space and the enclosing indoor spaces. Harnessing the optimum benefits of courtyards depends on several conditions namely the orientation and configurations of the courtyards, as well as the treatment of the external surfaces of the enclosing building envelopes. As three variables of orientation, number of floors and wall envelope have not been investigated in a single study, therefore, this parametric study was performed to investigate the microclimatic influence of varying courtyard geometric configurations and its enclosing facades in hot and humid climate using IES<VE> simulation tools. The study observed the environmental impact regarding thermal performance and energy consumption of the enclosing indoor spaces. The results suggest optimum conditions to harness the potential of courtyards to lower energy consumption of buildings in the tropics.Keywords: courtyard; thermal performance; energy consumption; simulationeISSN: 2398-4287 © 2019. The Authors. Published for AMER ABRA cE-Bs by e-International Publishing House, Ltd., UK. This is an open access article under the CC BYNC-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.DOI: https://doi.org/10.21834/e-bpj.v4i10.1637

Experimental study of thermohydraulic characteristics and irreversibility analysis of novel axial corrugated tube with spring tape inserts

2020 ◽  
Vol 92 (3) ◽  
pp. 30901
Author(s):  
Suvanjan Bhattacharyya ◽  
Debraj Sarkar ◽  
Ulavathi Shettar Mahabaleshwar ◽  
Manoj K. Soni ◽  
M. Mohanraj
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Thermal Performance ◽  
Working Fluid ◽  
The Novel ◽  
Heat Exchanger Tube ◽  
Heat Transfer Augmentation ◽  
Corrugated Tube ◽  
The Impact ◽  
Exchanger Tube

The current study experimentally investigates the heat transfer augmentation on the novel axial corrugated heat exchanger tube in which the spring tape is introduced. Air (Pr = 0.707) is used as a working fluid. In order to augment the thermohydraulic performance, a corrugated tube with inserts is offered. The experimental study is further extended by varying the important parameters like spring ratio (y = 1.5, 2.0, 2.5) and Reynolds number (Re = 10 000–52 000). The angular pitch between the two neighboring corrugations and the angle of the corrugation is kept constant through the experiments at β = 1200 and α = 600 respectively, while two different corrugations heights (h) are analyzed. While increasing the corrugation height and decreasing the spring ratio, the impact of the swirling effect improves the thermal performance of the system. The maximum thermal performance is obtained when the corrugation height is h = 0.2 and spring ratio y = 1.5. Eventually, correlations for predicting friction factor (f) and Nusselt number (Nu) are developed.

NUMERICAL ANALYSIS OF THE THERMAL PERFORMANCE OF A NOVEL DOUBLE-LAYERED HEAT SINK WITH STAGGERED PIN FINS

2019 ◽  
Vol 50 (8) ◽  
pp. 757-772 ◽  
Author(s):  
Yicang Huang ◽  
Hui Li ◽  
Shengnan Shen ◽  
Yongbo Xue ◽  
Mingliang Xu ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Thermal Performance ◽  
Heat Sink ◽  
Pin Fins

INVESTIGATION OF THE THERMAL PERFORMANCE OF MINIATURE LOOP HEAT PIPE WITH WATER-COPPER NANOFLUID

2013 ◽  
Vol 4 (3) ◽  
pp. 181-196
Author(s):  
Xiaowu Wang ◽  
Zhenping Wan ◽  
Yanxiao Xu ◽  
Yong Tang
Keyword(s):  
Heat Pipe ◽  
Thermal Performance ◽  
Loop Heat Pipe
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