Heat transfer reduction in buildings by embedding phase change material in multi-layer walls: Effects of repositioning, thermophysical properties and thickness of PCM

Li, Zhixiong; Al‐Rashed, Abdullah A.A.A.; Rostamzadeh, Mahfouz; Kalbasi, Rasool; Shahsavar, Amin; Afrand, Masoud

doi:10.1016/j.enconman.2019.04.075

Cited by 231 publications

(48 citation statements)

References 50 publications

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“…Sheikholeslami et al investigated MHD free convective flow through a permeable sinusoidal cavity by employing CVFEM. Li et al adopted finite‐volume method to explore entropy and exergy optimization analysis by implementing phase change materials (PCMs) into the conventional walls. However, enhancement of PCM solidification was explored by Sheikholeslami and Mahian with FEM.…”

Section: Introductionmentioning

confidence: 99%

Transient electromagnetohydrodynamic radiative squeezing flow between two parallel Riga plates using a spectral local linearization approach

Thumma¹,

Magagula

2019

Heat Trans. Asian Res.

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This article addresses transient electromagnetohydrodynamic radiative squeezing flow due to convectively heated electromagnetic actuator. The transport analysis of heat and mass is explored considering the heat generation/ absorption and destructive species homogeneous reaction. Suitable transformations are applied on the mathematical model developed to convert governing partial differential equations to ordinary differential equations (ODEs). Spectral local linearization method (SLLM) is employed on the resultant nonlinear coupled ODEs to compute the numerical results. Influence of sundry physical quantities on heat mass transfer of squeezing flow characteristics are determined using graphs and tabular results. SLLM results exhibit that momentum and temperature improved with rise in squeezing and heat source parameters correspondingly. Momentum enhances at lower plate and detracts with rise in modified Hartmann number. For improved heat source parameter, the rate of heat transfer diminishes and is more significant for higher Prandtl number values.This investigation has relevance in disk style magnetic clutches, rolling elements, food processing, bearings, squeezing film pressure sensors, and flow rheostats. K E Y W O R D S convective conditions, electromagnetohydrodynamic, heat source/ sink, riga plate, SLLM, squeezing flow

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Section: Introductionmentioning

confidence: 99%

Transient electromagnetohydrodynamic radiative squeezing flow between two parallel Riga plates using a spectral local linearization approach

Thumma¹,

Magagula

2019

Heat Trans. Asian Res.

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“…The temperature variation on the interior side with phase change material (PCM) (thickness 1 cm; left) and with different thickness (right) [Color figure can be viewed at wileyonlinelibrary.com]…”

Section: Role Of Pcm In Buildings: a Short Reviewmentioning

confidence: 99%

“…The temperature variation on the interior side with phase change material (PCM) (thickness 1 cm; left) and with different thickness (right) 91 [Color figure can be viewed at wileyonlinelibrary.com] its utilization for the next day. During the heating season, the PCM showed a reduction in its heating consumption.…”

Section: Figure 21mentioning

confidence: 99%

Recapitulation on latent heat hybrid buildings

2019

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Summary In the existent paper, the performance of thermal storage hybrid buildings exploiting the latent heat of phase change materials (PCMs) for thermal refrigeration and heating of the contemporary period has been investigated. The conventional buildings consume a large amount of electricity, primarily for the heating and cooling applications. Electricity generation primarily relies on coal‐based thermal power plants. The emissions from these establishments pose a serious threat to the environment. Moreover, conventional heating/cooling units rely on exorbitant energy cost. The usage of any kind of thermal storage system is an efficacious way of stockpiling thermal energy and utilizing it when needed. This paper gives a comprehensive overview of the available thermal storage units incorporating PCMs. The various segments of the buildings, viz, ceiling, window, wall, and floor have been analyzed in details. The results are quite promising in terms of load reduction and overall energy saving. Indoor surface temperature reduction of up to 7oC has been achieved. The energy saving of up to 40% can be realized by employing PCM. A comprehensive list of the PCMs is also tried to build up for end users according to their temperature requirement.

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“…1 Consumption of energy in buildings accounts for 40% of the total energy worldwide. 2 Energy is considered a critical factor in the growth and development of modern day global technological advancement. The pivotal role of energy in the development of the socio-economic and technological advancement of modern technologies is best exemplified in the utility of solar photovoltaic (PV) systems.…”

Section: Introductionmentioning

confidence: 99%

An experimental implementation and testing of a concentrated hybrid photovoltaic/thermal system with monocrystalline solar cells using linear Fresnel reflected mirrors

2019

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Summary Integration of solar concentrators with photovoltaic (PV) systems reduces the required number of PV panels, which often account for the major costs of PV systems. The linear Fresnel reflector mirror is considered more effective because of its simplicity and effortless fabrication. An experimental test rig of a concentrated PV/thermal system that employs a linear configuration and horizontal absorber was built for evaluating its electrical and thermal performances. The considered concentrator consists of various widths of flat glass mirrors, which positioned with different angles, and with sun light focusing on the PV cells that fixed over an active cooling system. The experimental investigation of the proposed concentrated PV/thermal system shows that higher electrical and thermal efficiencies can be achieved at comparatively high temperature levels than that typically utilized in a nonconcentrated PV/thermal system. The characteristics of PV cells also indicate that the electrical efficiency values in case of no concentration and with concentration ratio of 6.0 are 9.6%, and 11%, respectively. The measured values for the inlet and outlet cooling water temperatures of the receiver showed that the maximum outlet temperature reached was 75°C with a flow rate of 0.025 L/min, and the product thermal efficiency was 62.3%. These obtained results illustrate an adequate and good thermal and electrical performance under the meteorological weather conditions of the province of Al‐Karak in Jordan.

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Heat transfer reduction in buildings by embedding phase change material in multi-layer walls: Effects of repositioning, thermophysical properties and thickness of PCM

Cited by 231 publications

References 50 publications

Transient electromagnetohydrodynamic radiative squeezing flow between two parallel Riga plates using a spectral local linearization approach

Transient electromagnetohydrodynamic radiative squeezing flow between two parallel Riga plates using a spectral local linearization approach

Recapitulation on latent heat hybrid buildings

An experimental implementation and testing of a concentrated hybrid photovoltaic/thermal system with monocrystalline solar cells using linear Fresnel reflected mirrors

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