Development and preliminary evaluation of double roof prototypes incorporating RBS (radiant barrier system)

Chang, Pei-Chi; Chiang, Che‐Ming; Lai, Chi Ming

doi:10.1016/j.enbuild.2007.01.021

Cited by 41 publications

(31 citation statements)

References 11 publications

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“…They pointed out that the double-skin structure has the optimum efficiency with a 50mm-thick insulation, a 100mm-wide cavity and an inclination angle over 30deg from horizontal. Chang et al [20] designed a double roof prototypes incorporating radiant barrier system to reduce the conduction and convection heat transfer from roof to the ceiling and to block the radiation heat transfer between roof and ceiling. The results indicated that the heat flow into the interior diminish and the thermal insulation performance improves with the increase of the inclination angle of the basic prototype.…”

Section: Introductionmentioning

confidence: 99%

“…Numerous investigations on the effect of the parameter of roof solar chimney have been carried out because the design and the parameter of a roof solar chimney are critical for the fluid flow and heat transfer in roof solar chimney [6][7][8][9][10][11][12][13] .Other studies have focused on the optimization of roof solar chimney and the studies of roof solar chimney combined other technologies [14][15][16][17][18][19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

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Enhancement of natural ventilation of a novel roof solar chimney with perforated absorber plate for building energy conservation

Lei

Zhang

Wang

et al. 2016

Applied Thermal Engineering

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhancement of natural ventilation of a novel roof solar chimney with perforated absorber plate for building energy conservation

Lei

Zhang

Wang

et al. 2016

Applied Thermal Engineering

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“…The outdoor wind force should be incorporated into the double skin channel to produce ventilation and heat transfer, by combining the mechanisms of wind towers and wind scoops [7,8]. It is extremely important that enough ventilation be provided for the attic space, which is above the insulation layer in the pitch and flat roofs in cold areas.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Ventilation Design Mixes on the Thermal Environment in Elementary School Classrooms

Chiang

Lai

2009

Indoor and Built Environment

Self Cite

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Key Words classroom E natural ventilation E CFD (computational fluid dynamics) E CRSO (covered ridge with sidewall opening) E double roof AbstractThe roofs of most of the buildings in Taiwan are exposed to direct (overhead) solar radiation during the summer season because it is located near the Tropic of Cancer. The estimated yearly solar heat gain received from a roof is 2.78 times greater than that gained from a south-side wall (the second highest in terms of solar heat gain). Since most elementary schools in Taiwan are not equipped with air conditioners, the classrooms, especially those located on the upper floors, are regularly overheated. Solving the problem of ventilation and improving the thermal environment in Taiwan elementary school classrooms is an important endeavor. CFD simulations were conducted to investigate six combinations of designs that can incorporate natural ventilation (double roofs, ''Covered Ridge with Sidewall Opening'' (CRSOs), roof ridge openings, and window layout) influence indoor thermal environments, especially during the summer season when the outdoor wind velocity is low. The results show that when a double roof, roof ridge openings, and a CRSO are implemented, both the ventilation performance and the thermal environment of the classrooms are improved, regardless of whether the windows are laid out in a staggered formation (high-low) or in a conventional window layout.

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“…The ventilated BIPV design strategy can be achieved through a double-skin design, known as an effective way to reduce a building's solar heat gain [2,3]. A double-skin structure enables the mezzanine to form an air layer.…”

Section: Open Accessmentioning

confidence: 99%

Energy Saving Evaluation of the Ventilated BIPV Walls

Lai

Lin

2011

Energies

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This study integrates photovoltaic (PV) system, building structure, and heat flow mechanism to propose the notion of ventilated Building-Integrated Photovoltaic (BIPV) walls. The energy-saving potential of the ventilated BIPV walls was investigated via engineering considerations and computational fluid dynamics (CFD) simulations. The results show that the heat removal rate and indoor heat gain of the proposed ventilated BIPV walls were dominantly affected by outdoor wind velocity and airflow channel width. Correlations for predicting the heat removal rate and indoor heat gain, the reduction ratio of the indoor heat gain, CO 2 reduction, and induced indoor air exchange are introduced.

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Development and preliminary evaluation of double roof prototypes incorporating RBS (radiant barrier system)

Cited by 41 publications

References 11 publications

Enhancement of natural ventilation of a novel roof solar chimney with perforated absorber plate for building energy conservation

Enhancement of natural ventilation of a novel roof solar chimney with perforated absorber plate for building energy conservation

The Influence of Ventilation Design Mixes on the Thermal Environment in Elementary School Classrooms

Energy Saving Evaluation of the Ventilated BIPV Walls

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