Performance evaluation of phase change materials for thermal comfort in a hot climate region

Imghoure, Oumaima; Belouaggadia, Naoual; Ezzine, Mohammed; Lbibb, Rachid; Younsi, Zohir

doi:10.1016/j.applthermaleng.2020.116509

Cited by 22 publications

(13 citation statements)

References 33 publications

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“…The ceiling temperature, peak heat load reduction, daily heat gains, decremental factor, and melting and solidification cycle were evaluated as functions of the PCM layer inclination and concrete mass. Other authors, such as Imghoure et al [25], compared PCMs by analytic hierarchy processes, where common performance indicators, such as time lag and decremental factor, are evaluated by comparing PCM characteristics. Some of these are phase change temperature, density during solid phase, latent heat capacity, thermal conductivity during liquid and solid phases, and specific heat capacity.…”

Section: Performance Evaluation Of Pcms and Criteriamentioning

confidence: 99%

“…Imghoure et al [25] declared temperatures around 23.5 • C, where maximum temperature without PCM implementation exceeds 30 • C. Moreover, the decrement factor was decreased from 0.2 to almost 0.0014, and the thermal lag was increased from 4 h to 7 h. Bhamare et al [24] achieved ceiling temperature ranges between 25.5 • C and 27.5 • C by adding inclined PCM layer. This represents an improved time lag range between 6 h and 7 h and a decrement factor range between 0.043 and 0.082 when the non-PCM roof provides 5 h and 0.155, respectively.…”

Section: Indoor Temperaturementioning

confidence: 99%

“…Imghoure et al [25] considered six configurations made up with layers of mortar, brick, insulator, and PCM. The results show that placing PCM close to the hottest surface and after an insulation layer provides more utilization of the PCM layer since it absorbs more heat.…”

Section: Pcm Layer Locationmentioning

confidence: 99%

“…Imghoure et al [25] considered five different PCMs as alternatives for buildings. It was found that those PCMs with melting temperatures near the average daily temperature provide more comfort since the liquid phase is more frequent than other PCMs with higher melting temperatures.…”

Section: Phase Changing Operationmentioning

confidence: 99%

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Numerical Assessment of Different Phase Change Materials as a Passive Strategy to Reduce Energy Consumption in Buildings under Tropical Climates

2022

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The building envelope design constrains how much HVAC systems must work to provide comfort. High thermal mass in walls is preferable to delay heat gain, as well as reduce it. Phase Change Materials (PCMs) seem to proportionate more thermal mass without increasing wall thickness because of their high latent heat. Thus, this work studies various PCM-based envelope layouts in four case studies, H060, H100, H200, and OB, under the tropical climate of Panama City, via building energy performance simulation. Energy and thermal comfort performance were used as criteria to determine an optimal PCM-based layout for such a climate through optimization analysis and to compare PCM-based and non-PCM-based envelope layouts. Results showed that among the considered combinations, PCM-based roof configurations provide more optimum solutions than PCM-based wall configurations. The PCM layout with a melting temperature of 27 °C allowed completion of the PCM cycle throughout the year. Although other PCM layouts did not present a complete charge/discharge cycle, such as the most frequent options at H060, H100, and H200, it suggests that PCM on liquid or solid phase provides better thermal performance than other considered combinations.

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Section: Performance Evaluation Of Pcms and Criteriamentioning

confidence: 99%

Section: Indoor Temperaturementioning

confidence: 99%

Section: Pcm Layer Locationmentioning

confidence: 99%

Section: Phase Changing Operationmentioning

confidence: 99%

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Numerical Assessment of Different Phase Change Materials as a Passive Strategy to Reduce Energy Consumption in Buildings under Tropical Climates

2022

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“…In Morocco, the building sector is one of the structural sectors and alone accounts for 33% of final energy consumption, in addition to strong growth in annual energy consumption. 1 However, according to forecasts by the International Energy Agency (IEA), primary energy will increase by 37% in 2040. 2 The adoption of new approaches to improve thermal inertia by integration of phase change material (PCM) in light walls is now among the most widely accepted techniques in the literature.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of phase change material microencapsulated in a typical multilayer wall for a hot climatic zone

et al. 2021

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A phase change material (PCM) allows releasing and absorbing energy at the phase change transition. They are employed in building walls to maintain internal thermal comfort and optimize thermal energy storage.However, the hottest cities in Morocco suffer from overheating during peak days. Consequently in this article, the purpose is to evaluate the thermal performance of incorporation of the PCM n-octadecane paraffin in a typical multilayer wall at three different locations for a Moroccan hot climate zone. Numerical simulation is developed in a two-dimensional transient in addition to mathematical modeling using the enthalpy-porosity approach for three wall types. An implicit finite volume method is used for the numerical solution. The effects of PCM location, PCM type, and mass fraction (varying between 15% and 35%) are studied and compared with the reference case (without PCM). The evaluation of mass fraction variation is based on two determining factors of the wall panel's thermal inertia: the time delay and amplitude attenuation. The surface heat fluxes will then be used to quantify the capacity of the multilayer wall to store and release energy. The results showed that to ensure the thermal performance of the wall, it is useless to exceed 20% of mass fraction for all types of multilayer walls.

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Review on form-stable inorganic hydrated salt phase change materials: Preparation, characterization and effect on the thermophysical properties

2021

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Performance evaluation of phase change materials for thermal comfort in a hot climate region

Cited by 22 publications

References 33 publications

Numerical Assessment of Different Phase Change Materials as a Passive Strategy to Reduce Energy Consumption in Buildings under Tropical Climates

Numerical Assessment of Different Phase Change Materials as a Passive Strategy to Reduce Energy Consumption in Buildings under Tropical Climates

Numerical study of phase change material microencapsulated in a typical multilayer wall for a hot climatic zone

Review on form-stable inorganic hydrated salt phase change materials: Preparation, characterization and effect on the thermophysical properties

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