Evaluation of energy, thermal, and daylighting performance of solar control films for a case study in moderate climate

Moretti, Elisa; Belloni, Elisa

doi:10.1016/j.buildenv.2015.07.031

Cited by 37 publications

(31 citation statements)

References 36 publications

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“…17,20 Whilst shading and solar control systems are effective at reducing solar gain, they can contribute to an increase in heating and artificial lighting demand. 21 Daylight has an important role in reducing the energy consumption of artificial lighting, contributing to a healthier indoor environment and improving occupants' visual comfort. It is necessary, therefore, to consider beneficial daylighting aspects at the design stage of buildings in order to achieve a satisfactory result, 22 whilst also avoiding excessive sunlight that can lead to issues of glare and uncontrolled solar gains.…”

Section: Review Of Overheating Assessment and Competing Factorsmentioning

confidence: 99%

Modelling the overheating risk in an uniform high-rise building design with a consideration of urban context and heatwaves

Habitzreuter

Smith

Keeling

2019

Indoor and Built Environment

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Overheating in buildings is one of the increasing concerns related to climate change and can lead to an increase in heat-related health issues and higher energy consumption due to the use of air conditioning systems. Literature shows that internal conditions and demand on environmental control systems can vary with height within buildings. However, an architectural trend towards highly glazed façades for tall buildings suggests the vertical gradient of performance is not always considered in the design process. By simulating a high-rise residential building in London, a comparative analysis of the overheating risks and daylighting at different levels in the building was conducted. In this study the model was able to consider the influence of surrounding built environment on solar gain and so influence of urban location on overheating risk was taken into account. Simulations were conducted using typical reference years as well as meteorological data for specific heat-wave periods experienced in London and that are expected to become more intense and frequent due to climate change. Passive mitigation options (external shading) are demonstrated to help reduce overheating occurrence by 74%, at the same time the impact of decreased daylighting (30%) is less problematic at higher levels where daylight factor is greater.

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Section: Review Of Overheating Assessment and Competing Factorsmentioning

confidence: 99%

Modelling the overheating risk in an uniform high-rise building design with a consideration of urban context and heatwaves

Habitzreuter

Smith

Keeling

2019

Indoor and Built Environment

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“…The study by Moretti and Belloni [35] is one of the few analysing daylight performance in existing glazed offices, with and without solar control films. Using a full-scale experimental set-up and numerical analysis, they established that the use of a solar control film reduces incoming solar radiation by 60%, cooling energy demand by around 29% and daily illuminance levels by 59%.…”

Section: Introductionmentioning

confidence: 99%

Daylighting Performance of Solar Control Films for Hospital Buildings in a Mediterranean Climate

2019

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One of the main retrofitting strategies in warm climates is the reduction of the effects of solar radiation. Cooling loads, and in turn, cooling consumption, can be reduced through the implementation of reflective materials such as solar control films. However, these devices may also negatively affect daylight illuminance conditions and the electric consumption of artificial lighting systems. In a hospital building, it is crucial to meet daylighting requirements as well as indoor illuminance levels and visibility from the inside, as these have a significant impact on health outcomes. The aim of this paper is to evaluate the influence on natural illuminance conditions of a solar control film installed on the windows of a public hospital building in a Mediterranean climate. To this end, a hospital room, with and without solar film, was monitored for a whole year. A descriptive statistical analysis was conducted on the use of artificial lighting, illuminance levels and rolling shutter aperture levels, as well as an analysis of natural illuminance and electric consumption of the artificial lighting system. The addition of a solar control film to the external surface of the window, in combination with the user-controlled rolling shutter aperture levels, has reduced the electric consumption of the artificial lighting system by 12.2%. Likewise, the solar control film has increased the percentage of annual hours with natural illuminance levels by 100–300 lux.

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“…The energy performance of the innovative glazing systems proposed in the present paper was investigated by EnergyPlus TM software (Version 8.4, U.S. Department of Energy's (DOE), Washington DC, USA) [26][27][28]. Many simulations with different configurations and settings were performed considering a typical office building built in the 1990s as a reference ( Figure 4).…”

Section: Simulationsmentioning

confidence: 99%

High Energy-Efficient Windows with Silica Aerogel for Building Refurbishment: Experimental Characterization and Preliminary Simulations in Different Climate Conditions

2017

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Abstract:The paper deals with the potential of high energy-efficient windows with granular silica aerogel for energy saving in building refurbishment. Different glazing systems were investigated considering two kinds of granular silica aerogel and different glass layers. Thermal transmittance and optical properties of the samples were measured and used in building simulations. The aerogel impact on heat transfer is remarkable, allowing a thermal transmittance of 1.0-1.1 W/(m 2 ·K) with granular aerogel in interspace only 15 mm in thickness. A 63% reduction in U-value was achieved when compared to the corresponding conventional windows, together with a significant reduction (30%) in light transmittance. When assembled with a low-e glass, the U-value reduction was lower (31%), but a moderate reduction in light transmittance (about 10%) was observed for larger granules. Energy simulations for a case study in different climate conditions (hot, moderate, and cold) showed a reduction in energy demand both for heating and cooling for silica aerogel glazing systems, when compared to the conventional ones. The new glazings are a suitable solution for building refurbishment, thanks to low U-values and total solar transmittance, also in warm climate conditions.

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Evaluation of energy, thermal, and daylighting performance of solar control films for a case study in moderate climate

Cited by 37 publications

References 36 publications

Modelling the overheating risk in an uniform high-rise building design with a consideration of urban context and heatwaves

Modelling the overheating risk in an uniform high-rise building design with a consideration of urban context and heatwaves

Daylighting Performance of Solar Control Films for Hospital Buildings in a Mediterranean Climate

High Energy-Efficient Windows with Silica Aerogel for Building Refurbishment: Experimental Characterization and Preliminary Simulations in Different Climate Conditions

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