Effect of interior and exterior roof coating on heat gain inside a house
Source abstract
Abstract
This work evaluated the effect of changes in coatings (with different solar absorptances and emittances) on the thermal energy transfer by radiation through a roof sample. The coating on the interior surface of the roof was mainly analyzed. For this purpose, a sample roof configuration was designed, instrumented, and thermally evaluated. Under warm-humid climate conditions, roof coatings on the interior and exterior surfaces were applied. The reference roof sample (RS) consists of two extruded polystyrene plates. Four different coatings (Terracota Red, RR; Green, RV; Conventional white, B1; Reflective white, B2) were implemented on the upper surface of each plate, while only one coating was implemented on the inner surface of each plate (B1 or Aluminum foil, Al). From the results obtained with the RS and the development of a computational code where the transient one-dimensional heat conduction model is solved, it was possible to analyze the behavior of heat gains through a concrete slab. For this, four combinations of the exterior and interior coatings were implemented. The results showed that the combination B1-Al or B2-Al presented the most significant reduction in heat gains, with the highest reduction in thermal load of 49.53 %. These results show that the interior coatings significantly influence the heat flux behavior.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Building Energy and Comfort Optimization · Urban Heat Island Mitigation · Thermal Radiation and Cooling Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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