Low-emissivity coating coupled with aerogel-based plaster for walls' internal surface application in buildings: Energy saving potential based on thermal comfort assessment

Ibrahim, Mohamad; Bianco, Lorenza; Ibrahim, Oussama; Wurtz, Étienne

doi:10.1016/j.jobe.2018.04.008

Cited by 49 publications

(20 citation statements)

References 42 publications

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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%

“…For internal surfaces finishing, the low emissivity effects for longwave infrared radiation are rarely investigated [85,87], and few building energy simulation tools allow the selection of low-emissivity features for the internal surfaces [87]; iv.…”

Section: Imentioning

confidence: 99%

“…Reference Case (RC): α ext is set to 0.3 for the exterior vertical surfaces and to 0.6 for the roof external surface, whereas LW of the interior surfaces is assumed to be 0.9. • Low-Emissivity plaster Case (LEC): α ext is set to 0.3 for the exterior vertical surfaces and to 0.6 for the roof (as for the reference case, RC), whereas LW of the interior surfaces is assumed to be 0.1 [87].…”

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confidence: 99%

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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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Section: Imentioning

confidence: 99%

Section: Imentioning

confidence: 99%

mentioning

confidence: 99%

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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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“…Nevertheless, by using paints with ideal emissivity of 0.1 [15][16][17]), most of the low-emissivity paints commercially available present a higher thermal emissivity [7], even though several studies have theoretically demonstrated interesting improvement in the winter indoor comfort conditions and energy savings of between 5% and 22%.…”

Section: Introductionmentioning

confidence: 99%

Experimental Assessment of the Effects of Low-Emissivity Paints as Interior Radiation Control Coatings

Fantucci

Serra

2020

Applied Sciences

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Radiation Control Coatings (RCC) are commonly recognised as paints, in which the long-wave radiation emissivity can be dramatically reduced from 0.9 to below 0.25 due to the dispersion of aluminium flakes inside the base paint. The low emissivity (Low-E) feature makes these materials particularly suitable for reducing the radiative heat exchange in building components and worthy of being used in roof attics, pipes, heat storage tank, etc. However, in the last few years, the application to the indoor surfaces of the building envelope has become quite popular, because the reflective properties can be exploited to increase the thermal comfort and reduce the winter heat losses. Except for aluminium based paint, that, for their strong metallized effect, suffer from some aesthetical limitation, the claimed performance of most of the other commercially available reflective paints are not universally recognized and in most of the cases their properties are misled, referring to visible and short wave infrared reflectivity. In this paper, a new methodology for assessing the long-wave thermal emissivity by using a heat flow meter apparatus is proposed. Moreover, the thermal emissivity of different paint mixtures with reduced metallised effect is assessed. The results allow for affirming that paints with acceptable aesthetic value (limited metallized effect) can reach an emissivity of ~0.60 instead of a typical emissivity of paint between 0.85–0.90. Furthermore, the partition wall of a double climatic chamber apparatus was painted with different low-E paints to evaluate whether an increase of the indoor operative temperature would have been observed. A slight, but not negligible, increase was shown of up to 0.3 °C and 0.6 °C for paint with an emissivity of ~0.6 and ~0.4, respectively.

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“…With the advancement of science and technology, great progress has been made in the energy-saving techniques for buildings, including efficient use of solar energy [13], energysaving envelope structure [14], energy-saving doors and windows [15] and application of phase change heat storage materials [16]. In northern China, the incentive policies on the ULE passive buildings provide a strong support to the use of solar heating in buildings [17].…”

Section: Introductionmentioning

confidence: 99%

Potential of Solar Heating for Ultra-Low-Energy Passive Buildings in Cold Regions

Li¹,

Cao²,

Wang³

et al. 2019

IJHT

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The ultra-low-energy (ULE) passive buildings are an important trend of building energy conservation. China has been steadily pushing forward energy-saving policies for buildings, and started to promote the ULE passive buildings. Solar heating has a great application potential in the ULE passive buildings, which are required to consume a very low amount of energy. This paper establishes a simplified model of slab-type residential unit in cold regions of northern China, and correlates the areas of solar heating available on the south wall and the roof with the heating loss of the building, according to the change law of solar radiation. In addition, the calculation formulas for wall and roof heating factors were proposed under the ULE condition, and applied to compute the heating factors of major cities in northern China. The calculation results verify the effectiveness of the formulas. Through statistical analysis, it is learned that wall and roof heating factors are closely correlated with the regional latitude. Hence, the relationship between them were fitted, and verified by a case study in Shijiazhuang, China. The fitted relationship was proved correct, laying the basis for fast and accurate evaluation of solar heating potential in cold regions.

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Low-emissivity coating coupled with aerogel-based plaster for walls' internal surface application in buildings: Energy saving potential based on thermal comfort assessment

Cited by 49 publications

References 42 publications

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

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

Experimental Assessment of the Effects of Low-Emissivity Paints as Interior Radiation Control Coatings

Potential of Solar Heating for Ultra-Low-Energy Passive Buildings in Cold Regions

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