Climate applicability study of building envelopes containing phase change materials

Ji, Ren; Zheng, Yaxian; Zou, Zehui; Wei, Shen; Qu, Shilin

doi:10.1002/er.4772

Cited by 4 publications

(4 citation statements)

References 35 publications

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“…They concluded that a PCM with a melting point of 1°C to 3°C above the average building temperature is able to attain its optimal diurnal heat storage. It has been formerly stated that the efficiency of PCM in building applications is directly influenced by climatic conditions . Souayfane et al showed a strong relation between the climate condition and the effective performance of PCM.…”

Section: Methodsmentioning

confidence: 99%

Experimental and numerical assessment of using coconut oil as a phase‐change material for unconditioned buildings

et al. 2020

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The efficacy of integrating organic coconut oil (co-oil) phase-change material (PCM) into an unconditioned building with a lightweight envelope is explored experimentally and numerically for heat gain reduction. In what we think is the first test of its kind for co-oil PCM, twin side-by-side single-room buildings (with and without PCM) are constructed and studied experimentally under ambient weather conditions. The effects of the co-oil on the thermal performance of the buildings are investigated with respect to the window orientation (east, west, north and south). Furthermore, numerical simulation of the buildings is carried out to evaluate the contribution of the co-oil to their thermal performance and to determine the effect of the co-oil layer thickness on the heat storage capacity. Moreover, by employing a simplified heat transfer analysis, an approximate relation for the optimal thickness of co-oil PCM layer is developed. Experimental and numerical results show that co-oil PCM can be a promising solution to improve the indoor thermal environment. It is found that with a south-facing window equipped with co-oil PCM, the indoor temperature is lowered by 23.8% compared to the case without PCM, when an optimal PCM layer of~4 cm in thickness is embedded in the wall. K E Y W O R D Sbuilding envelopes, coconut oil, latent heat storage, phase change material, thermal comfort

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Section: Methodsmentioning

confidence: 99%

Experimental and numerical assessment of using coconut oil as a phase‐change material for unconditioned buildings

et al. 2020

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“…The price of oil and fossil fuels is increasing, and this issue has turned the amount of energy consumption and its production method, into one of the main challenges in developing countries. In recent decades, the energy demand of our society, especially in the building sector, has been steadily increasing [1]. The energy consumption of buildings constitutes about 40% of the total energy consumption in developed and developing countries [2].…”

Section: Introductionmentioning

confidence: 99%

Skin porosity geometry from the energy efficiency point of view; case study: an office building in Mashhad, Iran

Khayami¹,

Daneshjoo²,

Mahdavinejad³

2022

futech

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The construction sector accounts for a large portion of the world's energy consumption; in Iran, it’s more than 40% of energy consumption. Office buildings have a relatively unfavorable energy consumption pattern due to impersonal ownership and lack of supervision and needs improvement. The aim of this research is to achieve the most optimal skin porosity geometry in terms of energy for a dynamic double-skin façade. Since this idea is intended to be used in Mashhad, which is one of the religious centers of Iran, so to create this feeling in users, the geometry used for its dynamic second skin porosity is inspired by Islamic patterns of tiles and decorations of the holy shrine of Imam Reza (AS). By analyzing the energy performance of 5 selected geometries with Ladybug and Honeybee plugins, the most optimal one will be determined. Daylight is one of the most influential parameters in the design of energyefficient buildings. To make the most of this parameter, it is necessary to create facades with maximum transparency. But these facades face challenges such as overheating. Therefore, it’s important to control the amount of daylight entering. In this research, an optimal geometry for a dynamic double skin façade porosity intended to be used for office buildings in Mashhad is presented, although the energy analysis results of all 5 geometries are very close to each other. This means that the porosity geometry does not have much effect on the optimization of energy consumption.

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“…Other studies investigated dynamic properties, life cycle cost implications, and performance of PCMs on buildings' interior surfaces. [23][24][25][26] Incomplete solidification was found to be a major drawback of TESs incorporating PCMs into the passive cooling of building. 27 Studies have also reported the usefulness of PCMs by employing free cooling and active cooling applications of PCMs along with their limitations in terms of size, placement, and heat transfer.…”

Section: Introductionmentioning

confidence: 99%

“…Numerous research articles have examined PCMs integrated into building envelope components to improve the space thermal comfort and energy performance. Other studies investigated dynamic properties, life cycle cost implications, and performance of PCMs on buildings' interior surfaces 23‐26 . Incomplete solidification was found to be a major drawback of TESs incorporating PCMs into the passive cooling of building 27 .…”

Section: Introductionmentioning

confidence: 99%

Analysis of different operating strategies of thermal energy storage with radiant cooling system

Singh

Mathur

Bhandari

2020

Intl J of Energy Research

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Thermal energy storage systems in building cooling applications have been explored extensively as a peak load-shifting technology. Thermal energy storage performance has been recognized and studied from an energy cost-savings point of view because of peak-valley price differences, but not many studies have been conducted from an energy savings viewpoint. This study experimentally investigates the performance of the energy storage-retrofitted to a ceilingtype radiant cooling system. To study the performance, a water-based storage system was designed and developed for an academic office building equipped with a radiant cooling system. The water in the storage tank was cooled to a certain storage temperature in the nighttime, and the same water was used during the daytime for meeting the cooling load. Different combinations of charging and discharging schedules were analyzed. The key objective of the study was to achieve energy savings and energy-cost savings simultaneously. This objective was accomplished by identifying the major factors contributing to the energy consumption of the storage-retrofitted cooling system and devising novel operating strategies, leading to an enhanced energy savings potential. Two operating strategies comprising 24 operating scenarios were compared and the storage was used to dispatch the load for 3 hours of the day as a full storage unit. Results showed that in hot and dry climate conditions, using the storage with the radiant cooling system offered energy savings of 3% to 14%. The energy-cost analysis was also performed using a time-of-day electricity tariff plan. The energy-cost savings varied from 17.5% to 22.4% for these operating scenarios.

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Climate applicability study of building envelopes containing phase change materials

Cited by 4 publications

References 35 publications

Experimental and numerical assessment of using coconut oil as a phase‐change material for unconditioned buildings

Experimental and numerical assessment of using coconut oil as a phase‐change material for unconditioned buildings

Skin porosity geometry from the energy efficiency point of view; case study: an office building in Mashhad, Iran

Analysis of different operating strategies of thermal energy storage with radiant cooling system

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