Optimisation of wall insulation thickness using energy management strategies: Intermittent versus continuous operation schedule

Tunçbilek, Ekrem; Komerska, Anna; Arıcı, Müslüm

doi:10.1016/j.seta.2021.101778

Cited by 13 publications

(7 citation statements)

References 48 publications

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“…The optimization of insulation material and thickness is a recurrent topic of research using lifecycle cost analysis [15] or lifecycle primary energy [16], for example. Meanwhile, some studies do indeed consider GHG emissions.…”

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confidence: 99%

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A carbon-focus parametric study on building insulation materials and thicknesses for different heating systems: A Swiss case study

Mosquini

Tappy

Jusselme

2022

IOP Conf. Ser.: Earth Environ. Sci.

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To tackle the problem of climate change, Swiss energy strategies aim to reach the carbon neutrality by 2050. However, this challenge cannot simply be solved by focusing on the operational energy performance and instead, on a lifecycle evaluation. Thus, in order to reduce the sector’s carbon footprint, building stakeholders need to consider embodied GHG emissions of construction materials. In this study, a parametric method was developed to balance operational and embodied impacts of insulation strategies on GHG emissions according to the material and heating system choices. The methodology is split into two for the computation of the overall carbon emissions of the heating plus insulation system. Firstly, the calculation of the embodied emissions, which relies on Environmental Product Declarations of different construction materials. Secondly, the calculation of the operational emissions, which is the product between the thermal energy needs and the energy carbon content of the respective heating system. Thereafter, the methodology was applied to two case studies: an existing building and a brand-new building. The first main finding was that, for high-carbon insulation materials, there was clearly an optimal thickness after which, adding insulation would only increase the lifecycle impact of the system. For instance, in the heat-pump equipped case study, installing 35 cm of extruded polystyrene insulation (XPS) is more harmful towards global warming than installing 17 cm of XPS. This trend was not present for low-carbon materials whatsoever. The building’s carbon emissions benefitted from their addition of insulation up to the maximum thicknesses studied. To conclude, it is also important to highlight that aimlessly targeting energy efficiency can be a step back towards the goal of carbon neutrality. Indeed, it is possible to claim that for energy efficient buildings, fossil fuel-based insulation should be carefully used. This study allowed the development and application of a method that identifies optimal insulation thickness and material for a given heating system and hopefully, highlight the importance of considering both embodied and operational emissions of construction materials and systems.

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confidence: 99%

“…• This study only calculated the GWP of insulation plus heating system during the building's lifecycle. However, openings' characteristics and infiltration are also impactful parameters in a building's heating needs [15]. • The KBOB database does not yet take the carbon sink potential of bio-based insulation.…”

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confidence: 99%

A carbon-focus parametric study on building insulation materials and thicknesses for different heating systems: A Swiss case study

Mosquini

Tappy

Jusselme

2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…Optimizing the insulation capacity of external walls of buildings in different climatic regions in Libya towards energy-efficient use [38] Optimizing the insulation layer of the exterior wall Energy simulation and optimization of the insulation layer thickness of walls using energy management strategies [39] Based on current trends and research worldwide, it is evident that analyzing and optimizing the energy performance of building external walls is becoming increasingly important. In particular, optimizing the layers of the wall structure has attracted a lot of attention from scientists and has achieved certain achievements in energy research.…”

Section: Content Of Studies Citationsmentioning

confidence: 99%

Enhancing Building Energy Efficiency with Aluminum Composite Material Facade: A Performance Simulation Study using Building Energy Modeling and Building Information Modeling

Luong,

Truong,

Ngo

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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Building facade is an integral piece to the overall design of a building, which not only ensures adequate interior thermal comfort, minimizing cooling load rate but also lowering overall building energy consumption. In recent years, aluminum composite material wall (ACM) is a new decorative material that is increasingly being used by developers, designers, and architects, which led to many innovative building facade designs. It is a straightforward and versatile product that provides a weather-resistant, sound-insulation, heat-insulation, earthquake-resistant, and shock-resistant façade that is simple to install. As a result, this study proposes a perfomance of energy simulation with ACM material applied in building design using Building Energy Modeling (BEM). Energy simulation in buildings using a Building Information Modeling (BIM) system is proposed to reduce the Energy Use Intensity (EUI) and energy cost of building in its construction process. The results of this study are expected to assist architects and building managers in improving and enhancing the energy efficiency of buildings. These significant findings demonstrate the potential of using ACM wall to improve building energy efficiency.

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“…5,6 Several studies have been conducted on building envelope optimization to reduce the energy consumption of A/C systems. [7][8][9] However, few of these research studies addressed the fact that in practice, the household split air conditioners are operated intermittently, that is, they stop and start frequently. Indoor air temperature can fluctuate considerably during intermittent operation, which may negatively influence the indoor thermal environment.…”

Section: Introductionmentioning

confidence: 99%

Impact of nano‐enhanced phase change material on thermal performance of building envelope and energy consumption

Tunçbilek

Arıcı

Krajčík

et al. 2022

Intl J of Energy Research

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Summary Using phase change material (PCM) in the building envelope can provide energy saving advantages by shaving peak heating and cooling loads. However, the poor thermal conductivity of PCMs limits their application and potential benefits because of inadequate heat storage/release rates. Increasing effective thermal conductivity by adding metal nanoparticles with high thermal conductivity to PCM (NPCM) could be a promising method to accelerate the phase change process, thereby exploiting latent heat more effectively. The potential impact of the utilization of NPCM technology has not yet been adequately explored for building external walls. This study aimed to reveal whether the dispersal of highly conductive nanoparticles in PCM in external building walls helps conserve energy or not. PCM enriched with aluminium oxide nanoparticles (Al2O3) with a content of 1, 2, and 3 vol% was used. The outputs showed that the nanoparticle addition decreased the energy‐saving performance of PCM since the reduction in the thermal resistance and latent heat capacity caused by the nanoparticles loading was more profound than the enhancement provided by the improvement of latent heat exploitation caused by the increased thermal conductivity. For example, heating energy saving was reduced by 0.6% when a 3‐cm PCM with 1 vol% Al2O3 was used instead of a pure PCM. The negative impact increased to 1.7% by increasing the nanoparticle concentration to 3 vol%. Thus, augmenting the thermal conductivity for higher latent heat activation by adding nanoparticles was not beneficial for building wall applications in a hot‐summer Mediterranean climate. Highlights Effect of nanoparticle‐enhanced PCM on building energy saving. PCM with Al2O3 content of 0, 1, 2, and 3 vol% embedded in external wall. Yearly energy saving of 20.7% was achieved with pure PCM in the wall. Adding 3 vol% Al2O3 to PCM reduced heating energy saving by 1.7%. Negative effect on energy saving increased with increasing nanoparticle concentration.

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Optimisation of wall insulation thickness using energy management strategies: Intermittent versus continuous operation schedule

Cited by 13 publications

References 48 publications

A carbon-focus parametric study on building insulation materials and thicknesses for different heating systems: A Swiss case study

A carbon-focus parametric study on building insulation materials and thicknesses for different heating systems: A Swiss case study

Enhancing Building Energy Efficiency with Aluminum Composite Material Facade: A Performance Simulation Study using Building Energy Modeling and Building Information Modeling

Impact of nano‐enhanced phase change material on thermal performance of building envelope and energy consumption

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