A review on energy conscious designs of building façades in hot and humid climates: Lessons for (and from) Kuala Lumpur and Darwin

Halawa, Edward; Ghaffarianhoseini, Amirhosein; Trombley, Jeremy; Hassan, Norhaslina; Baig, Mirza Humayun; Yusoff, Safiah Yusmah Muhammad; Ismail, Muhammad Azzam

doi:10.1016/j.rser.2017.08.061

Cited by 91 publications

(44 citation statements)

References 146 publications

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“…The construction industry is mainly focused on different actions to promote innovative and sustainable solutions in new and existing buildings, emphasizing the building envelope [22][23][24], mainly the façades, which play a substantial role in the energy saving of the buildings [25][26][27][28][29]. Along this line, Halawa et al [30] presented a review addressing different options to optimize the performance of building façades in hot and humid climates, drawing attention to innovative solutions. This review highlighted better thermal insulation and ventilated façade systems as the most relevant and appropriate ones.…”

Section: Introductionmentioning

confidence: 99%

Experimental Validation of a Numerical Model of a Ventilated Façade with Horizontal and Vertical Open Joints

et al. 2019

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Commercial and residential building is one of the four major final energy consumption and end-use sectors. In this sector, cooling loads represent an important part of the energy consumption, and therefore, they must be minimized, improving the energy efficiency of buildings. Ventilated façades are one of the most widely used passive elements that are integrated into buildings, precisely with the aim of reducing these loads. This reduction is due to the airflow induced in the air cavity by the buoyancy forces, when the solar radiation heats the outer layer of the façade. In the open joint ventilated facades (OJVF), ventilation is attained through the open joints between the panels composing the outer layer. Despite the steadily growing research in the characterization of this type of system, few studies combine the numerical modelling of OJVF with experimental results for the assessment of the airflow in the ventilated cavities. This paper experimentally validates a numerical simulation model of an OJVF. Firstly, the façade performance has been experimentally assessed in a laboratory model determining the temperatures in the panels and air gap and measuring the flow field at the gap using particle image velocimetry (PIV) techniques. Secondly, a numerical model has been developed using advanced Computational Fluid Dynamics (CFD) simulation tools. Finally, an experimental validation of the numerical model has been done. Experimental and numerical results are compared in different planes inside the ventilated cavity. The discrete ordinates (DO) radiation model and the k-ε renormalisation group (RNG) turbulence model better adjust the simulated results to the experimental ones.

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Section: Introductionmentioning

confidence: 99%

Experimental Validation of a Numerical Model of a Ventilated Façade with Horizontal and Vertical Open Joints

et al. 2019

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“…However, research into the microclimate impacts of urban vertical surfaces and the effect of building facade geometry and fabric remain relatively underdeveloped [44]. While research into the optical properties, thermal and energy performance and outdoor thermal comfort impacts of cool materials for use in building envelopes is more advanced [36,37,54,72,73,[108][109][110][111][112][113], the conceptualisation of building facades as more than merely an ensemble of material "facets" (or discrete, homogenous, surfaces [5]) and the development of climate sensitive architectural design applications that progress beyond a singular focus on cool and smart material specification [114][115][116] are still emerging (e.g., [117][118][119][120]).…”

Section: Purpose and Significance Of The Workmentioning

confidence: 99%

The Effect of Building Facades on Outdoor Microclimate—Reflectance Recovery from Terrestrial Multispectral Images Using a Robust Empirical Line Method

Fox

Osmond

Peters

2018

Climate

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Climate change and the urban heat island effect pose significant health, energy and economic risks. Urban heat mitigation research promotes the use of reflective surfaces to counteract the negative effects of extreme heat. Surface reflectance is a key parameter for understanding, modeling and modifying the urban surface energy balance to cool cities and improve outdoor thermal comfort. The majority of urban surface studies address the impacts of horizontal surface properties at the material and precinct scales. However, there is a gap in research focusing on individual building facades. This paper analyses the results of a novel application of the empirical line method to calibrate a terrestrial low-cost multispectral sensor to recover spectral reflectance from urban vertical surfaces. The high correlation between measured and predicted mean reflectance values per waveband (0.940 (Red) < r s > 0.967 (NIR)) confirmed a near-perfect positive agreement between pairs of samples of ranked scores. The measured and predicted distributions exhibited no statistically significant difference at the 95% confidence level. Accuracy measures indicate absolute errors within previously reported limits and support the utility of a single-target spectral reflectance recovery method for urban heat mitigation studies focusing on individual building facades.Climate 2018, 6, 56 2 of 26 UHIs develop in most cities regardless of climate [10] and have been observed globally in over 400 urban areas [4]. The magnitude of the screen height air temperature difference between urban and non-urban locations, or between different Local Climate Zones [10], is quantified by the "UHI intensity" which is most pronounced during calm, clear summer nights [2]. The average maximum UHI intensity for 87 European cities has been reported to be almost 6.2 K within a range of 2.8 K to 12 K [11]. Similar magnitude UHI intensities were reported for 101 Asian and Australian cities [12].The superimposition of inadvertent urban heating (i.e., UHIs) and global warming, including more frequent, longer and intense heat waves [13][14][15] elevates the risk of heat-related mortality and illness in cities [16][17][18] and extreme urban heat has detrimental outdoor comfort, economic and building energy impacts [19][20][21]. The intentional modification of urban surface geometry, cover and fabric to reduce urban heat and decouple heat waves from amplified UHIs [22,23] is now a policy priority for many cities [24,25]. Urban Heat Mitigation-Current Status and Cooling MagnitudeIn summer, solar absorption by urban surfaces is the dominant cause of the UHI effect [5]. Recent efforts to mitigate the formation of urban heat at different spatial scales have focused on changes to urban surface geometry and fabric [26][27][28] with the primary aim of controlling the absorption of solar radiation and increasing moisture availability [22,29]. However, due to the significant urban surface and air temperature reduction potential of reflective technologies [19,30] heat mitigation solely...

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“…Other studies highlighted that heat gain in buildings can be caused by daylighting through fenestrations [12], [13]. Evidently, large fenestrations particularly on the Eastern and Western facades of buildings in the tropics allows too much daylight to enter the building thus, heat gain [14]. In order to mitigate this incidental heat gain, daylighting is supplied in a diffused manner through light troughs, light shelves, light ducts and optical fiber [15], [16].…”

Section: Introductionmentioning

confidence: 99%

Exploration in Using Algae to Enhance Indoor Environment in the Tropical Climate

Ismail

Al-Obaidi

2019

2019 2nd Asia Conference on Energy and Environment Engineering (ACEEE)

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This paper discusses an exploration in algae application as a sun shading device for buildings. Four basic algae photobioreactors were constructed to investigate the effectiveness of Chlorella species to reduce direct sunlight transmission and solar heat gain in the Tropical climate of Kuala Lumpur. From the experiment, algae flat panel photobioreactor with direct carbon dioxide supply manage to reduce up to 44.9% of heat gain due to solar radiation on average. The overall solar transmission was also reduced to only 25% on average. These indicate that algae have the potential to be used as sun shading material for buildings.

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A review on energy conscious designs of building façades in hot and humid climates: Lessons for (and from) Kuala Lumpur and Darwin

Cited by 91 publications

References 146 publications

Experimental Validation of a Numerical Model of a Ventilated Façade with Horizontal and Vertical Open Joints

Experimental Validation of a Numerical Model of a Ventilated Façade with Horizontal and Vertical Open Joints

The Effect of Building Facades on Outdoor Microclimate—Reflectance Recovery from Terrestrial Multispectral Images Using a Robust Empirical Line Method

Exploration in Using Algae to Enhance Indoor Environment in the Tropical Climate

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