Effects of louvers shading devices on visual comfort and energy demand of an office building. A case of study

Hernández, Francisco Fernández; López, José Manuel Cejudo; Suárez, José Miguel Peña; Muriano, M Carmen González; Rueda, Simón Carrillo

doi:10.1016/j.egypro.2017.11.136

Cited by 42 publications

(26 citation statements)

References 8 publications

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“…Hernández et al [7] drew the same conclusions after testing different solar shading configurations. They demonstrated a significant worsening of the visual comfort, when a configuration of louvre angles that maximised the cooling energy performance in an office building was applied.…”

Section: Introductionmentioning

confidence: 68%

“…Many studies have dealt with the commonly adopted retrofit actions and have demonstrated the negative effect on visual comfort as a result of a reduction in daylight availability; these actions mainly concerned window replacements [2][3][4][5][6], solar shading device installations [4,7,8] and the reduction of window carcasses, due to the thickening of the thermal insulation [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…The implications on the indoor environmental quality of partial building renovation, involving just one, or a combination of two energy efficiency measures, were studied in the aforementioned works [2][3][4][5][6][7][8][9][10][11]. Holistic approaches that take into account comfort aspects, energy consumption and nZEB requirements are diffuse in studies concerning the design of new low-energy buildings, as in the work of Jin et al [12].…”

Section: Introductionmentioning

confidence: 99%

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Transformation of an Office Building into a Nearly Zero Energy Building (nZEB): Implications for Thermal and Visual Comfort and Energy Performance

et al. 2019

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Directive 2010/31/EU promotes the refurbishment of existing buildings to change them into nearly zero-energy buildings (nZEBs). Within this framework, it is of crucial importance to guarantee the best trade-off between energy performance and indoor environmental quality (IEQ). The implications of a global refurbishment scenario on thermal and visual comfort are assessed in this paper pertaining to an existing office building. The retrofit actions applied to achieve the nZEB target consist of a combination of envelope and technical building systems refurbishment measures, involving both HVAC and lighting. Energy and comfort calculations were carried out through dynamic simulation using Energy Plus and DIVA, for the thermal and visual performance assessments, respectively. The results point out that energy retrofit actions on the building envelope would lead to significant improvements in the thermal performance, regarding both energy savings (−37% of the annual primary energy for heating) and thermal comfort. However, a daylighting reduction would occur with a consequent higher electricity demand for lighting (36%). The research presents a detailed approach applicable to further analyses aimed at optimizing the energy efficiency measures in order to reduce the imbalance between visual and thermal comfort and to ensure the best performance in both domains.

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Section: Introductionmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Transformation of an Office Building into a Nearly Zero Energy Building (nZEB): Implications for Thermal and Visual Comfort and Energy Performance

et al. 2019

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“…Passive design needs to take advantage of the local climate, especially solar radiation, for illuminance enhancement. Therefore, as a passive approach, building shading design is critical to maximise indoor visual comfort and to reduce building energy consumption by controlling the amount of incident solar radiation [22]. Of the various design techniques for green buildings, natural…”

Section: Background Knowledgementioning

confidence: 99%

Integrated Daylighting Design by Combining Passive Method with DaySim in a Classroom

Kwon

Lee

2018

Energies

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This paper suggests a daylighting design method by combining a passive approach and advanced software to design external shading devices for daylighting in a classroom. A simplified method to predict and assess the indoor natural illuminance is a prerequisite for designers to design schools with better performance. Recently there has been growing demand for school refurbishment; mainly environmental improvement of classrooms in Korea. However, the passive approach of design has been neglected while the use of advanced simulation software has increased, requiring additional time and cost. Combining passive design methods with up-to-date numerical simulation is explored with shading devices to verify the daylighting distribution and daylight autonomy in classrooms with different orientations and shading forms. Weather tool Autodesk Ecotect, for the shading coefficient, and DaySim software (v3.0), for daylight autonomy, were adopted for the initial and the detail design stage, respectively. The findings support the linked design approaches of passive and advanced software would benefit designers in the strategic design process with further potential for design options and lighting electricity reduction.

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“…In the same year, Rey-Hernandez et al [42] used DesignBuilder to analyze and design solar photovoltaic systems, biomass and earth-air heat exchanger to meet the needs of electricity, cooling and heating, so as to achieve nZEB energy balance. Fernández Hernánde et al [43] discussed how to achieve a good balance of daylight, energy consumption, and comfort by adopting proper types of windows, shading, and lighting controls.…”

Section: Introductionmentioning

confidence: 99%

A Study on Energy-Saving Technologies Optimization towards Nearly Zero Energy Educational Buildings in Four Major Climatic Regions of China

Zhao

2019

Energies

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An educational building is a kind of public building with a high density of occupants and high energy consumption. Energy-saving technology utilization is an effective measure to achieve high-performance buildings. However, numerous studies are greatly limited to practical application due to their strong regional pertinence and technical simplicity. This paper aims to further optimize various commonly used technologies on the basis of the current national standards, and to individually establish four recommended technology selection systems corresponding to four major climatic regions for realizing nearly zero energy educational buildings (nZEEBs) in China. An educational building was selected as the case study. An evaluation index of energy-saving contribution rate (ECR) was proposed for measuring the energy efficiency of each technology. Thereafter, high energy efficiency technologies were selected and implemented together in the four basic cases representing different climatic regions. The results showed that the total energy-saving rate in severe cold regions increased by 70.74% compared with current national standards, and about 60% of the total energy-saving rate can be improved in cold regions. However, to realize nZEEBs in hot summer and cold winter regions as well as in hot summer and warm winter regions, photovoltaic (PV) technology needs to be further supplemented.

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Effects of louvers shading devices on visual comfort and energy demand of an office building. A case of study

Cited by 42 publications

References 8 publications

Transformation of an Office Building into a Nearly Zero Energy Building (nZEB): Implications for Thermal and Visual Comfort and Energy Performance

Transformation of an Office Building into a Nearly Zero Energy Building (nZEB): Implications for Thermal and Visual Comfort and Energy Performance

Integrated Daylighting Design by Combining Passive Method with DaySim in a Classroom

A Study on Energy-Saving Technologies Optimization towards Nearly Zero Energy Educational Buildings in Four Major Climatic Regions of China

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