Cooling load reduction in office buildings of hot-arid climate, combining phase change materials and night purge ventilation

Solgi, Ebrahim; Fayaz, Rima; Kari, Behrouz Mohammad

doi:10.1016/j.renene.2015.07.028

Cited by 99 publications

(39 citation statements)

References 27 publications

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“…This study finds that the effectiveness of nighttime ventilation may be improved by its integration with other control methods related to occupant behavioral factors. The work of Solgi et al [38], for example, shows that integrating phase-change materials and nighttime ventilation potentially reduces the cooling load of buildings.…”

Section: Discussionmentioning

confidence: 99%

Cooling Energy Implications of Occupant Factor in Buildings under Climate Change

Lim

Yun

2017

Sustainability

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Occupant factor is a critical element in the overall energy consumption of buildings. This study aims to reveal how occupant factors influence the energy consumption of example buildings in Seoul, Tokyo, and Hong Kong under climate change projections, and to prioritize factors with energy saving potential for buildings in consideration of future climate change. The study finds that the cooling degree-hours base of 23.3 • C in the three cities sharply increases with future climate change by analyzing future hourly weather data produced herein. Simulations are made with EnergyPlus Runtime Language (Erl) for modeling occupant behavior. The simulation results reveal that a dynamic thermostat control based on an adaptive comfort model is an effective method to reduce cooling energy consumption under future climate change, reducing cooling energy consumption by up to 18% in some instances. In particular, we reveal that a combined application of the adaptive comfort control, nighttime ventilation, and the use of occupancy-based lighting and equipment result in reducing cooling energy consumption by 28%. The outcomes of this study are potentially useful in providing cost-effective solutions to adapt buildings for future climate change with simple modifications to occupant behavior. Also, the roles of renewable energy are briefly discussed.

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Section: Discussionmentioning

confidence: 99%

Cooling Energy Implications of Occupant Factor in Buildings under Climate Change

Lim

Yun

2017

Sustainability

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“…These materials have the ability to absorb and release massive amounts of energy during phase transitions with small temperature change. A lot of work has been done for thermal comfort improvement and reduction of energy consumption in buildings by integration of PCMs [2][3][4][5][6][7]. Osterman et al [8] presented a study on PCM thermal storage systems of buildings for space heating and cooling on an annual basis using 30 plates filled with paraffin.…”

Section: Introductionmentioning

confidence: 99%

Thermal Performance Analysis of Multi-Phase Change Material Layer-Integrated Building Roofs for Energy Efficiency in Built-Environment

2017

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Thermal energy storage using phase change materials (PCMs) plays a significant role in maintaining thermal comfort and reducing energy consumption in a building because of its ability to absorb/release heat within small temperature variations. In this paper, the thermal performance of roofs has been investigated based on various factors like the integration of a single PCM layer, integration of a double PCM layer, the thickness of the PCM, phase transition temperature and heat of fusion of the PCM. The analysis shows that integration of a single PCM layer of different thickness and phase transition temperature and heat of fusion in roof structures is unable to maintain a comfortable constant temperature inside the building due to incomplete solidification and melting of the PCM. However, the analysis shows that with multi-PCM layers of appropriate thickness it is possible to maintain a constant comfortable temperature of about 28 • C in the building throughout the day in Chennai, India. The analysis also shows that there is reduction in heat gain by 17 to 26% for a single PCM layered roof and 25 to 36% for a double PCM layered roof compared to the roof without PCM layer for the different months of the year.

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“…It has been suggested that integrating PCMs with nighttime ventilation can achieve greater energy efficiency. Thus, PCMs are more effective in office buildings that are unoccupied during the night [38].…”

Section: Passive Building Energy Saving Technologiesmentioning

confidence: 99%

Building energy-consumption status worldwide and the state-of-the-art technologies for zero-energy buildings during the past decade

Cao

Dai

Liu

2016

Energy and Buildings

1,094

387

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Cooling load reduction in office buildings of hot-arid climate, combining phase change materials and night purge ventilation

Cited by 99 publications

References 27 publications

Cooling Energy Implications of Occupant Factor in Buildings under Climate Change

Cooling Energy Implications of Occupant Factor in Buildings under Climate Change

Thermal Performance Analysis of Multi-Phase Change Material Layer-Integrated Building Roofs for Energy Efficiency in Built-Environment

Building energy-consumption status worldwide and the state-of-the-art technologies for zero-energy buildings during the past decade

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