Development of a thermally enhanced frame wall with phase-change materials for on-peak air conditioning demand reduction and energy savings in residential buildings

Zhang, Meng; Medina, Mario A.; King, Joan E.

doi:10.1002/er.1082

Cited by 123 publications

(36 citation statements)

References 8 publications

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“…Zhang et al (2005) tested a frame wall that integrates a highly crystalline paraffin PCM for residential buildings in a hot and humid summer / cold winter climate in the USA, which reduced wall peak heat fluxes by as much as 38% and cooling load by around 10%. Weinläder et al (2005) tested and simulated a façade panel consisting of double glazing with PCMs for residential buildings in Würzburg, Germany, and found that heat losses in south-oriented facades could be 30% less, and solar heat gains were also reduced by about 50%, which reduces peak cooling loads during the day.…”

Section: Introductionmentioning

confidence: 99%

The Indoor Environmental Quality Improving and Energy Saving Potential of Phase-Change Material Integrated Facades for High-Rise Office Buildings in Shanghai

Jin¹

2017

International Journal of High-Rise Buildings

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The conflict between indoor environmental quality and energy consumption has become an unneglectable problem for highrise office buildings, where occupants' productivity is highly affected by their working environment. An effective façade, therefore, should play the role of an active building skin by adapting to the ever-changing external environment and internal requirements. This paper explores the energy-saving and indoor environment-improving potential of a phase-change material (PCM) integrated façade. Building performance simulations, combined with parametric study and sensitivity analysis, are adopted in this research. The result quantifies the potential of a PCM-integrated façade with different configurations and PCM properties, taking as an example a south-oriented typical office room in Shanghai. It is found that a melting temperature of around 22•C for the PCM layer is optimal. Compared to a conventional façade, a PCM-integrated façade effectively reduces total energy use, peak heating/cooling load, and operative temperature fluctuation during the periods of May-July and November-December.

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Section: Introductionmentioning

confidence: 99%

The Indoor Environmental Quality Improving and Energy Saving Potential of Phase-Change Material Integrated Facades for High-Rise Office Buildings in Shanghai

Jin¹

2017

International Journal of High-Rise Buildings

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“…Thermal storage characteristic of paraffin (mainly nonadecane) as microencapsulated phase change material was reported by Zhang et al 9 among others. [10][11][12][13] But due to the low thermal conductivity and large volumetric variations during phase transition, n-alkanes yet face many obstructions to wide spread commercialization. Hence, enhancing the properties of n-alkanes is necessary to augment its performance for various applications.…”

Section: Introductionmentioning

confidence: 99%

Molecular dynamics insight to phase transition in n-alkanes with carbon nanofillers

Rastogi

Vaish

2015

AIP Advances

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The present work aims to investigate the phase transition, dispersion and diffusion behavior of nanocomposites of carbon nanotube (CNT) and straight chain alkanes. These materials are potential candidates for organic phase change materials(PCMs) and have attracted flurry of research recently. Accurate experimental evaluation of the mass, thermal and transport properties of such composites is both difficult as well as economically taxing. Additionally it is crucial to understand the factors that results in modification or enhancement of their characteristic at atomic or molecular level. Classical molecular dynamics approach has been extended to elucidate the same. Bulk atomistic models have been generated and subjected to rigorous multistage equilibration. To reaffirm the approach, both canonical and constant-temperature, constant- pressure ensembles were employed to simulate the models under consideration. Explicit determination of kinetic, potential, non-bond and total energy assisted in understanding the enhanced thermal and transport property of the nanocomposites from molecular point of view. Crucial parameters including mean square displacement and simulated self diffusion coefficient precisely define the balance of the thermodynamic and hydrodynamic interactions. Radial distribution function also reflected the density variation, strength and mobility of the nanocomposites. It is expected that CNT functionalization could improve the dispersion within n-alkane matrix. This would further ameliorate the mass and thermal properties of the composite. Additionally, the determined density was in good agreement with experimental data. Thus, molecular dynamics can be utilized as a high throughput technique for theoretical investigation of nanocomposites PCMs.

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“…The results show that, incorporating the phase change material with appropriate melting point can improve the thermal performances of the wall. Zhang et al [8] presented the development of a thermally enhanced wall that reduces peak airconditioning demand in residential buildings. Berroug et al [9] analyzed the thermal performance of a north wall made with hydrate salt phase change material as a storage medium in east-west oriented greenhouse.…”

Section: Introductionmentioning

confidence: 99%

Thermal Control Of Building Using Latent Heat Storage South Wall

Faraji¹,

Alami²,

Najam³

2014

J. Math. Computer Sci.

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The aim of the present work is to study the thermal performance of a composite wall used for heating management of building. The solar energy absorbed by the wall is stored in a phase change material (PCM). The advantage of using this heating strategy is that PCMs are able to melt and absorb a high amount of diurnal solar radiations and release it to the room during the night to provide passive nocturnal heating. A one-dimensional mathematical model was developed in order to analyze and optimize the proposed latent heat storage wall. Numerical investigations were conducted in order to examine the effects of the PCM position and the PCM material properties on the thermal behavior of the proposed wall. It was found that, when the PCM layer is closer to the inner face of the wall, thermal comfort conditions are considerably improved compared to a concrete wall without PCM. The good PCM choice is satisfied when the material melts completely before the sunset and re-solidifies completely before the sunrise. Phase change materials that have a better thermal conductivity lead to a significant reduction of the building energy consumption.

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Development of a thermally enhanced frame wall with phase-change materials for on-peak air conditioning demand reduction and energy savings in residential buildings

Cited by 123 publications

References 8 publications

The Indoor Environmental Quality Improving and Energy Saving Potential of Phase-Change Material Integrated Facades for High-Rise Office Buildings in Shanghai

The Indoor Environmental Quality Improving and Energy Saving Potential of Phase-Change Material Integrated Facades for High-Rise Office Buildings in Shanghai

Molecular dynamics insight to phase transition in n-alkanes with carbon nanofillers

Thermal Control Of Building Using Latent Heat Storage South Wall

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