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Laminated glazing for buildings: energy saving, natural daylighting, and CO2 emission mitigation prospective

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Abstract

Operational energy use and energy-based GHG emissions of air-conditioning in the building sector are increasing aggressively due to occupants’ higher thermal and visual comfort aspirations. Window glazing is the critical building component that affects the thermal performance of the conditioned space. The existing glazing in the buildings allows huge heat gain/loss, leading to additional energy requirements for HVAC systems. Novel laminated glasses with various solar control film interlayers were studied in this article to improve the thermal performance of the conditioned space. Solar-optical properties and thermal indices of proposed laminated glasses were explored to study the potential energy savings and carbon emission mitigations. Thermal loads and energy savings were calculated with the help of a validated mathematical model across three distinct Indian climates (hot, cold, and composite). Substantial reductions in heat gain/loss and energy requirements were found with laminated glasses compared to monolithic clear glass. The laminated glass with reflective solar control film glazing (LGRF) had concluded a cost saving of 100.84 $/year with a payback period of 1.7 years for cold climate in S-E orientation. CO2 emission mitigation of building with laminated glasses was calculated for the energies conserved with carbon emission factors. The LGRF had reported a carbon emission mitigation of 2.1 tCO2/year for cold climates and comparable results for hot and composite climates. Daylight performance was carried out with the DesignBuilder simulation tool to assess the daylight accession in building interiors with laminated glasses. The laminated glasses were able to reduce annual energy requirements without greatly affecting the daylight inflow.

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Formal analysis and Investigation: Venkata Ramana Maduru. Writing—original draft preparation: Venkata Ramana Maduru. Conceptualization: Saboor Shaik. Methodology: Saboor Shaik. Resources: Saboor Shaik. Supervision: Saboor Shaik. Writing—review and editing: Saboor Shaik.

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Correspondence to Saboor Shaik.

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Responsible Editor: Philippe Garrigues

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Highlights

• Spectral characterization of various laminated glazing systems

• Influence of glazing solar-optical properties on building HVAC requirements

• Prospect for air-conditioning cost savings and diurnal illumination

• Carbon (CO2) emission mitigation and payback periods of laminated glazing systems

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Maduru, V.R., Shaik, S. Laminated glazing for buildings: energy saving, natural daylighting, and CO2 emission mitigation prospective. Environ Sci Pollut Res 29, 14299–14315 (2022). https://doi.org/10.1007/s11356-021-16565-9

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  • DOI: https://doi.org/10.1007/s11356-021-16565-9

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