Cool roof coating impact on roof-mounted photovoltaic solar modules at texas green power microgrid

Abstract

Abstract Cool-roofing is effective in reducing cooling load and increasing the energy balance of buildings with high solar reflectance throughout the cooling season. This article proposed a large-scale of a resilient Microgrid, along with comprehensive thermal analyses for residential building, focused on cool roof-mounted solar photovoltaic system. This project boosts generated power while circumventing a voided warranty issue with the roof temperatures. A white silicone coating on the metal roof with 186 solar photovoltaic 330-W modules were applied to supply solar energy, utilizing a DC-coupled system that features nine 5\xa0kW inverters each with a maximum system input of 600Vdc and 92 batteries with 225.216 kWh energy storage. Upon the completion of the project, the input and output voltages produced by the inverters daily/monthly, along with the battery energy storage, were monitored and authenticated with thermal modeling calculations. Moreover, cool-roof benefit to reduce the solar cell thermal voltage and module/roof heat flux based on the conductive coefficient was evaluated. As a result, solar power efficiency was improved by 10.4%, producing 294.6 kWh of solar energy despite system losses, and the roof temperature was reduced by 3.82°F, increasing 1.91% of output power. Lastly, the comparison study of cool/hot solar power systems proved that cool-roof application significantly enhances safety, sustainable energy development, and building comfort when globally applied.