Exploring the potentialities of cool facades to improve the thermal response of Mediterranean residential buildings

Zinzi, Michele

doi:10.1016/j.solener.2016.06.021

Cited by 48 publications

(19 citation statements)

References 44 publications

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“…If the operative temperature reduction in the hottest week in Athens (3)(4)(5)(6)(7)(8)(9) th August) and Tunis (12 th -18 th August) is analyzed in details (Figure 13), the results change furtherly. Nevertheless, in all summer, both in Athens and Tunis, the introduction of an ideal cooling system in order to evaluate the sensible cooling demonstrates that the performance of PCM M91/Q25 is still efficient (Figure 14).…”

Section: Analysis Of Retrofit Solutions In Different Climate Conditionsmentioning

confidence: 99%

“…The potential benefits of the use of PCMs [7,8] and the application of finishing materials with high reflectance [9,10] have been widely studied distinctly but their combination needs further researches in the field of building retrofitting in relation to climate change mitigation strategy. In fact, building enclosure and its performance influence not only the energy efficiency of a building but also the surrounding environment contributing to global warming.…”

Section: Pcms and Cool Materials In Building Retrofittingmentioning

confidence: 99%

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Energy efficiency and resilience against increasing temperatures in summer: the use of PCM and cool materials in buildings

Lassandro¹,

Turi²

2017

IJHT

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Nowadays, it is important to understand how to combine energy efficiency and the point of view of resilience. Regarding buildings, resilience represents the ability to recover from or adapt to an unfavorable condition or event, maintaining their own functionality and performances. This issue has been ignored for several years, especially in building sector, but the impacts of natural hazards and climate change are becoming more and more influential and frequent. Moreover, urban areas are responsible of a great part of global energy consumption and CO2 emissions, in addition to the intensification of greenhouse effect. For this reason, the use of new technologies (PCM and cool materials) for buildings can affect not only indoor microclimate, but also urban environment. Starting from the dynamic simulations of common buildings in South of Italy and then in other hotter Mediterranean climate (Athens, Tunis), the research analyses various typologies of these materials and possible combined applications. The aim of the study is to understand, through a set of proper indicators, how they can contribute to enhance energy performance of buildings and climate resilience in order to face rising temperatures also at neighbourhood level.

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Section: Analysis Of Retrofit Solutions In Different Climate Conditionsmentioning

confidence: 99%

Section: Pcms and Cool Materials In Building Retrofittingmentioning

confidence: 99%

Energy efficiency and resilience against increasing temperatures in summer: the use of PCM and cool materials in buildings

Lassandro¹,

Turi²

2017

IJHT

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“…It is worth noting that such innovative passive envelope solutions [80][81][82] are gaining much more interest as they can be easily implemented in new or existing buildings in order to reduce their energy consumption [83]. Nevertheless, the available literature on these materials (e.g., references [84][85][86][87][88][89]) highlights that much research work is needed, because of the following: ii.…”

Section: Imentioning

confidence: 99%

“…In case of high-reflective paints, the majority of papers regard applications for horizontal or tilted external surfaces (i.e., cool roofs [86]), whereas only few works are focused on vertical ones [88,89]; iii.…”

Section: Imentioning

confidence: 99%

Building Energy Performance Analysis: An Experimental Validation of an In-House Dynamic Simulation Tool through a Real Test Room

et al. 2019

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This paper focuses on the experimental validation of a building energy performance simulation tool by means of a comparative analysis between numerical results and measurements obtained on a real test room. The empirical tests were carried out for several months under variable weather conditions and in free-floating indoor temperature regime (switched off HVAC system). Measurements were exploited for validating an in-house simulation tool, implemented in MatLab and called DETECt, developed for dynamically assessing the energy performance of buildings. Results show that simulated indoor air and surface room temperatures resulted in very good agreement with the corresponding experimental data; the detected differences were often lower than 0.5 °C and almost always lower than 1 °C. Very low mean absolute and percentage errors were always achieved. In order to show the capabilities of the developed simulation tool, a suitable case study focused on innovative solar radiation high-reflective coatings, and infrared low-emissivity materials is also presented. The performance of these coatings and materials was investigated through a comparative analysis conducted to evaluate their heating and cooling energy saving potentials. Simulation results, obtained for the real test cell considered as equipped with such innovative coatings and material, show that for the weather zone of Naples a 5% saving is obtained both in summer and in winter by simultaneously adopting a high-reflectance coating and a low- emissivity plaster for roof/external walls and interior walls, respectively.

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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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Exploring the potentialities of cool facades to improve the thermal response of Mediterranean residential buildings

Cited by 48 publications

References 44 publications

Energy efficiency and resilience against increasing temperatures in summer: the use of PCM and cool materials in buildings

Energy efficiency and resilience against increasing temperatures in summer: the use of PCM and cool materials in buildings

Building Energy Performance Analysis: An Experimental Validation of an In-House Dynamic Simulation Tool through a Real Test Room

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

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