Thermal Analysis of Wall and Window Glass Materials for Cooling Load Reduction in Green Energy Building Design

Gorantla, Kirankumar; Shaik, Saboor; Babu, T.P. Ashok

doi:10.1016/j.matpr.2017.06.215

Cited by 9 publications

(6 citation statements)

References 6 publications

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“…Thermal study of numerous buildings and glass structures of varying WWRs has been carried out to achieve an optimum combination to reduce the cooling load in a house [32]. Simulation studies were carried out to find suitable single/double glazing, laminated glazing, and hydrogel glazing to reduce cooling and heating costs in buildings of various climatic conditions [33][34][35][36]. The effective usage of natural daylight for lighting or illumination shows a decrease in the energy use of artificial daylighting.…”

Section: Introductionmentioning

confidence: 99%

Energy Savings and Carbon Emission Mitigation Prospective of Building’s Glazing Variety, Window-to-Wall Ratio and Wall Thickness

et al. 2021

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Strategic selection of glazing, its window-to-wall ratio, and wall thickness of building reduce the energy consumption in the built environment. This paper presents the experimental results of solar optical properties of five glasses: clear, tinted bronze, tinted green, bronze reflective, and polymer dispersed liquid crystal glasses. Laterite room models were modeled with four different thicknesses and four different glasses using Design Builder, and thermal simulation tests were carried out using Energy Plus. The energy savings and carbon emission mitigation prospective of a building’s glazing variety, window-to-wall ratio (WWR), and wall thickness were investigated. The results revealed that among the five window glasses studied, the polymer dispersed liquid crystal glazing window (PDLCGW) was found to be the most energy-efficient for low heat gain in laterite rooms. The laterite room with 0.23 m wall thickness and 40% PDLCGW WWR reduced 18.9% heat gain in comparison with the laterite room with 0.23 m wall thickness and 40% clear glass WWR. The laterite room of 0.23 m wall thickness with PDLCGW glazing of 40% WWR enhanced cooling cost savings up to USD 31.9 compared to the laterite room of 0.08 m wall thickness with 40% PDLCGW. The laterite room of 0.23 m wall thickness with PDLCGW glazing of 40% WWR also showed improved carbon mitigation of 516 kg of CO2/year compared to the 0.23 m wall thickness laterite room of 40% WWR with clear glass glazing. The results also showed that the laterite room with 0.23 m wall thickness and 100% clear glass WWR increased heat gain by 28.2% in comparison with the laterite room with 0.23 m wall thickness and 20% clear glass WWR. The results of this article are essential for the strategic design of buildings for energy saving and emission reduction.

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Section: Introductionmentioning

confidence: 99%

Energy Savings and Carbon Emission Mitigation Prospective of Building’s Glazing Variety, Window-to-Wall Ratio and Wall Thickness

et al. 2021

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“…Solar radiation is responsible for 40%-70% of cooling load in buildings. Minimizing solar heat gain from walls and windows can significantly reduce energy consumption for air-conditioning [1]. Heat transfer from transparent surfaces differ significantly from that through opaque surfaces.…”

Section: Introductionmentioning

confidence: 99%

Effect of window-to-wall-area ratio on thermal performance of building wall materials in Elazığ, Turkey

Özel

2020

PLoS ONE

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In this study, the effect of glazing-to-total-wall-area ratio on the thermal performance of different wall materials is numerically investigated in terms of heat transmission load. The investigation was performed for a South-facing wall in Elazığ, Turkey. The heat transmission load through walls and windows are determined separately for summer and winter climate conditions. In this analysis, the frame area of the window is not considered. Therefore, whereas the glazing area on uninsulated and insulated walls is increased from 0% to 100%, the heat gain and losses are calculated separately according to the glazing type. The transmission loads through the wall are determined by an implicit finite difference procedure under steady periodic conditions. Concrete, briquettes, bricks, and autoclaved aerated concrete are selected as structure materials. Results show that in the uninsulated wall, the wall material affected the glazing area, whereas in the insulated wall, the effect of wall material on glazing area is insignificant.

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“…Where, 𝑞𝑠 = sensible cooling Load (Btu/hr) 𝑊 = watts input of electrical lighting (W) 𝐹𝑠 = special ballas allowance factor 𝐶𝐿𝐹 = cooling load factor 𝐶𝐿𝐹 = 1,0 when cooling system is operatedonly when light is on 𝐶𝐿𝐹 = 1,0 when lights are on more than 16 hr per day By using equations (1) to (12) and based on Tables (1) and ( 2), the total cooling load of the building was determined. The condition where the type of glass has not been replaced is referred to as the existing condition, while after the glass material is replaced with coated glass is referred to as the modified condition.…”

Section: Methodsmentioning

confidence: 99%

“…Generally, radiation is much greater than conduction. The cooling load of solar radiation is about 40 to 70% [1]. Because of this, using glass materials that can reduce radiation in a building is highly recommended for the reduction of cooling load [2]- [4].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of the Effect of Changes in Glass Typeon the Cooling Load in a Building

Sunardi,

Mitrakusuma,

Pradita

et al. 2024

IJATR

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Solar radiation enters the building through the glass by both radiation and conduction. The heat passing through the glass is one of the largest cooling loads. Therefore, modifying the glass type, will potentially reduce the cooling load significantly. This numerical study uses Cooling Load Temperature Difference (CLTD) method to calculate the change in cooling load in a five-story hospital. The Glass material was changed from clear glass to coated glass. Based on the calculation of cooling load per hour, from 07.00 to 19.00, it is obtained that the peak load occurs at 17.00, both when using clear glass clear and coated glass. The replacement of clear glass with coated glass results in a 70.0% decrease in radiation cooling load, from 104.59 kW to 31.38 kW. In addition, replacing this type of glass will reduce the total cooling load by 17.0%, from 418.80 kW to 347.57 kW. The decrease in total cooling load will lead to a decrease in the operational cost of the air conditioning system. If it is assumed that the AC system operates at 75% peak load for 16 hours per day, then replacing the glass will reduce electricity costs by approximately Rp. 43.6 million/month.

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Thermal Analysis of Wall and Window Glass Materials for Cooling Load Reduction in Green Energy Building Design

Cited by 9 publications

References 6 publications

Energy Savings and Carbon Emission Mitigation Prospective of Building’s Glazing Variety, Window-to-Wall Ratio and Wall Thickness

Energy Savings and Carbon Emission Mitigation Prospective of Building’s Glazing Variety, Window-to-Wall Ratio and Wall Thickness

Effect of window-to-wall-area ratio on thermal performance of building wall materials in Elazığ, Turkey

Numerical Investigation of the Effect of Changes in Glass Typeon the Cooling Load in a Building

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