Parameter design for a phase change material board installed on the inner surface of building exterior envelopes for cooling in China

Sun, Xiaofeng; Zhang, Quan; Medina, Mario A.; Lee, Kyoung Ok; Liao, Shuguang

doi:10.1016/j.enconman.2016.04.096

Cited by 58 publications

(10 citation statements)

References 20 publications

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“…rough the diffuser in the indoor part of the system, the processed natural light can be efficiently and evenly used to the places where lighting is needed [24].…”

Section: Principle Of Light Pipementioning

confidence: 99%

Research and Development of Civil Engineering Intelligent Structure System

Xie

Gao

Cheng

2021

Advances in Civil Engineering

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With the rapid development of global civil engineering construction, the intelligent structural system of civil engineering has evolved into one of the current global frontier disciplines. The research on the intelligent structural system of civil engineering and the current development situation are analyzed, and the main problems are combined. Giving reasonable suggestions is of great significance to the country's vigorous development of civil engineering intelligent structure system. This paper designs a new type of three-dimensional fiber grating sensor, including the design of the matrix model and the design of fiber grating strain gauges. This new sensor can effectively measure three-dimensional space, greatly expanding the application range of fiber grating sensors. In this paper, the design lighting area of each light pipe is taken as a unit. Each unit is set with 4 measuring points at the center and the edge. Each measuring point reads 3 illuminance value parameters and records the average value. Based on the results and comprehensive consideration of the short board situation, the research conclusions and recommendations are put forward. The foundation wall with aerated concrete blocks as the wall material can meet the requirements of 50% energy saving for exterior wall buildings with external decoration and internal insulation mortar. Compared with the benchmark wall of 50% energy saving of external wall buildings, the heat transfer coefficient is reduced by 50.1%, and the actual energy-saving effect of the wall can reach 75%. Meet the requirements of 65% for the energy-saving effect of exterior wall buildings. This paper considers economic parameters, such as the investment cost of building insulation materials, energy-saving income, and investment recovery period, and establishes a calculation model for analyzing the economics of insulation materials. Based on the heat transfer model of the composite wall and the fuel energy combustion equation, greenhouse gas is an established calculation model for CO2 and SO2 emissions. Studies have shown that when considering the room temperature insulation performance of insulation materials, the time required for the side of the concrete slab with glass fiber felt and aerogel insulation materials is about 2022 and 3363 s, respectively, indicating the fire resistance of aerogel insulation materials significantly better than fiberglass.

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“…rough the diffuser in the indoor part of the system, the processed natural light can be efficiently and evenly used to the places where lighting is needed [24].…”

Section: Principle Of Light Pipementioning

confidence: 99%

Research and Development of Civil Engineering Intelligent Structure System

Xie

Gao

Cheng

2021

Advances in Civil Engineering

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“…Phase change materials (PCMs) absorb and release a large amount of heat during phase change. Therefore, PCMs may contribute to room temperature stability and reduce heating load by solar heat storage …”

Section: Introductionmentioning

confidence: 99%

“…Therefore, PCMs may contribute to room temperature stability and reduce heating load by solar heat storage. [1][2][3][4] When a designer considers installing PCM in a house, room temperature or heat load calculations might be used to estimate the effectiveness of PCM. Typical methods used for calculating PCM includes finite difference method, finite volume method, and finite element method.…”

Section: Introductionmentioning

confidence: 99%

Replacement model of phase change building materials for heat load calculation

Serikawa

Satoh²,

Mae

2020

Japan Architectural Review

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Phase change materials (PCMs) may contribute to room temperature stability and heat load reduction. This research proposes a method to calculate heat load using a PCM replacement model for a thermal storage wall. Regarding the replacement of PCM with internal thermal mathematical models, the replaced PCM temperature and room temperature are related. The method to replace PCM in adjoining rooms is based on the heat transfer coefficient, heat transmission coefficient, solar absorptance on the surface of a wall, ceiling, or floor, etc. We compare the results of the proposed replacement model of room temperature and heat load to a detailed heat load calculation.

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“…They recommended that the PCM thickness must be optimized for its use with an optimal storage effect during a complete day (Kuznik et al, 2008). Similarly, Sun et al (2016) analyzed the energy efficiency of panel macro-encapsulated PCM for a building envelope. It was concluded that the maximum thickness of PCM panel should be <5 mm in various climatic regions in China; otherwise, the PCM board would not be fully charged at most time.…”

Section: Introductionmentioning

confidence: 99%

Potential Thermal Enhancement of Lightweight Building Walls Derived From Using Phase Change Materials (PCMs)

2019

Self Cite

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This paper presents results of the potential thermal enhancement in building walls derived from using phase change materials (PCMs). Typical North American construction, namely, frame walls outfitted with hydrated-salt-based PCM with a melting temperature of 29 • C were evaluated in well-controlled test houses under full weather conditions. It was found that PCMs produced reductions in energy gains during summer. The reductions were assessed via total heat transfer and peak heat transfer. For a 10 percentage by weight (wt%) PCM concentration, the largest peak flux reduction of 31.25% was observed when the PCM was integrated within a north-facing wall. For a 20 wt% PCM concentration, the largest peak flux reduction was 25.54% when the PCM pipes was installed on an east-facing wall. Doubling the amount of PCM did not produce improvement on heat flux reduction except for the east-facing wall. The indoor wall surface temperature and temperature amplitude was reduced by 1.5 and 1.4 • C, respectively. The maximum time lag for peak heat flux was observed on the north-facing wall, which was 1.5 h for a 10 wt% PCM concentration and 2.25 h for a 20 wt% PCM concentration, respectively. To achieve the maximum energy savings, it is recommended that the PCMs be installed within west-facing walls.

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Parameter design for a phase change material board installed on the inner surface of building exterior envelopes for cooling in China

Cited by 58 publications

References 20 publications

Research and Development of Civil Engineering Intelligent Structure System

Research and Development of Civil Engineering Intelligent Structure System

Replacement model of phase change building materials for heat load calculation

Potential Thermal Enhancement of Lightweight Building Walls Derived From Using Phase Change Materials (PCMs)

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