Performance Assessment of Ancient Wind Catchers - an Experimental and Analytical Study

Hedayat, Zhaleh; Belmans, Bert; Ayatollahi, M. Hossein; Wouters, Ine; Descamps, Filip

doi:10.1016/j.egypro.2015.11.292

Cited by 23 publications

(10 citation statements)

References 11 publications

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“…In hot-humid climates regardless of the temperature fluctuation ranging from 24.7 • C to 40 • C, the internal temperature could stay comfortable [78]. Wind capture can reduce energy consumption in cooling loads by 16-27% in the hottest hours [79], and it was recorded in Iran in a hot and dry climate that it can reduce the internal temperature by 10-20 • C [80]. The cost of adding this method is not high and the payback can be in 1.3 years [81].…”

Section: Wind Catchersmentioning

confidence: 99%

A Review of Roofing Methods: Construction Features, Heat Reduction, Payback Period and Climatic Responsiveness

Abuseif

Gou

2018

Energies

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The roofs of buildings play an essential role in energy efficiency because a significant amount of solar radiation is absorbed by roofs in hot weather and a significant amount of heat is lost through roofs in cold weather. This paper is a systematic literature review about roofing methods for flat roofs. Ten roofing methods are reviewed in this paper. They are concrete roof, cool roof, insulated roof, roof garden, photovoltaic panels’ roof, biosolar roof, double-skin roof, roof ponds, skylight roof, and wind catcher. The review covers each roof’s main features, heat flux reductions, payback periods, and the appropriate climate for its implementation. Furthermore, the basic principles for selecting appropriate roofing methods are discussed and future studies for integrating these roofing methods are suggested. Some of these methods can eliminate the need of installing HVAC (Heating Ventilation and Air-conditioning) systems and others can achieve a high percentage of heat reduction if they are the right choice and they are implemented in the right circumstances. An incorrect selection could result in mild to severe energy penalties. The review contributes to the increasing knowledge about sustainable roofing and helps designers to increase building energy efficiency by selecting the appropriate roofing method.

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Section: Wind Catchersmentioning

confidence: 99%

A Review of Roofing Methods: Construction Features, Heat Reduction, Payback Period and Climatic Responsiveness

Abuseif

Gou

2018

Energies

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“…Wind catchers are a prominent feature in many traditional buildings in the middle east. Hedayat et al (2015) measured their efficiency in a house in Yazd, Iran. They found that it had a significant effect ranging from 17-70%.…”

Section: Introductionmentioning

confidence: 99%

A Review of Thermal Design for Buildings in Hot Climates

Kharrufa¹,

Noori²

2022

JST

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Most of the developed world currently lives above the tropic of Cancer in cold climate regions. It follows that most of the top architectural firms are from the same countries, and most of their work is based on that experience. Experience that does not travel well to hotter countries. This paper is mainly concerned with the climates of the Middle East region, which are hot in summer and have mild or cold winters, and where the humidity ranges from dry to humid. It is a review of the factors, designs, and solutions that designers sometimes ignore, undervalue, or on the other hand, put too much weight on when working in such climates. An overview of thermal solutions is conducted, and a critique and suitability of each one for hotter climates are offered. Some of the solutions, which are thought to be helpful, have little benefit, especially traditional ones, which are not up to present-day standards and lifestyles. Others, such as courtyards, do more harm than good. A couple of case studies to evaluate houses with and without thermal measures showed improvements of 23-48%. The paper will evaluate architectural, cooling, and building design solutions according to suitability in dry and medium humidity, warm and hot countries.

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“…The roof design is a decisive factor in conserving the energy of the building because the roof surface is directly exposed to solar radiation and is a pathway to transfer ambient solar heat inside the building. There is a previous research categorizing 10 roofs according to various energy conservation criteria such as heat gain reduction, heat flux reduction, lighting energy conservation, and internal temperature maintenance as shown below: (1) concrete roof (heat gain reductions: 40%) [1]; (2) cool roof (Heat gain reductions: 33%) [2]; (3) insulated roof(Heat flux reductions: 75%) [3]; (4) roof garden or Green roof (heat flux reductions: 31-37%) [4]; (5) photovoltaic panel roof (heat flux reductions: 60-63%) [5]; (6) biosolar (heat flux reductions: 50%) [6]; (7) double-skin roof (heat gain reductions: 71%) [7]; (8) roof ponds (keep the internal temperature as 24-28 • C) [8]; (9) sky catcher (lighting energy conservation: Loads 20%); (10) wind catcher (energy consumption savings: 16-27%) [9]. Among the researches related to the roof designs in conserving the energy, roof gardens (green roof) and cool roof accounts about 50% of articles registered in the Web of Science database until 2018 [10].…”

Section: Introductionmentioning

confidence: 99%

Evaluating the Operational Potential of LRV Signatures Derived from UAV Imagery in Performance Evaluation of Cool Roofs

et al. 2019

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It is quite difficult to find studies regarding area-wide data from UAV (Unmanned Aerial Vehicle) remote sensing in evaluating the energy saving performance of a cool roof. Acknowledging these constraints, we investigated whether LRV (Light Reflectance Value) signatures derived from UAV imagery could be used effectively as an indicator of area-wide heating and cooling load that distinctively appears according to rooftop color. The case study provides some quantitative tangible evidence for two distinct colors: A whitish color roof appears near the edge of the highest LRV (91.36) and with a low temperature (rooftop surface temperature: (38.03 °C), while a blackish color roof shows the lowest LRV (18.14) with a very high temperature (65.03 °C) where solar radiation is extensively absorbed. A strong negative association (Pearson correlation coefficient, r = −0.76) was observed between the LRV and surface temperature, implying that a higher LRV (e.g., a white color) plays a decisive role in lowering the surface temperature. This research can be used as a valuable reference introducing LRV in evaluating the thermal performance of rooftop color as rooftops satisfying the requirement of a cool roof (reflecting 75% or more of incoming solar energy) are identified based on area-wide objective evidence from UAV imagery.

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Performance Assessment of Ancient Wind Catchers - an Experimental and Analytical Study

Cited by 23 publications

References 11 publications

A Review of Roofing Methods: Construction Features, Heat Reduction, Payback Period and Climatic Responsiveness

A Review of Roofing Methods: Construction Features, Heat Reduction, Payback Period and Climatic Responsiveness

A Review of Thermal Design for Buildings in Hot Climates

Evaluating the Operational Potential of LRV Signatures Derived from UAV Imagery in Performance Evaluation of Cool Roofs

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