Abstract
This study combines microencapsulated phase change materials (mPCMs) (core material: paraffin; melting points: 37 and 43 °C) and aluminum honeycomb boards (8 mm core cell) to form mPCM roof modules and investigates their heat absorption and release performances, as well as their impact on indoor heat gain by conducting experiments over a 24-h period, subject to representative weather. The outdoor boundary conditions of the module are hourly sunlight and nighttime natural cooling; on the indoor side of the module, the conditions are daytime air conditioning and nighttime natural cooling. The results indicate that compared to a roof module with a 43 °C melting point mPCM, the roof module with a 37 °C melting point mPCM had improved peak load-shifting capacity, but had a slightly increased indoor heat gain. The mPCMs in both roof modules were successfully cooled during the night, returning to their initial state, to begin a new thermal cycle the next day.
Highlights
A phase change material (PCM) is a substance with a high latent heat that can effectively store or release latent heat during its solid or liquid phase change
The results indicated that the aluminum honeycomb used for the main structure and heat transfer enhancement in the prototype swiftly transferred the heat flow into the microencapsulated phase change materials (mPCMs)
The experiment divided into two43-D, stages: h ofmaterial solar heating duringthe themean daytime and 14 h of as follows: the modelis name is MPCM
Summary
A phase change material (PCM) is a substance with a high latent heat that can effectively store or release latent heat during its solid or liquid phase change (melting or solidifying). Liu et al [15] developed a wall tile containing macro-encapsulated PCM (macroPCM) and polyvinyl acetate (PVA) This tile showed a lower indoor heat flow than that of other tested construction materials and increased the time lag of the peak load, effectively shifting the peak energy demand in the summer. By incorporating mPCMs into building construction, the through-wall/roof heat transfer can be appropriately controlled with the absorption and release of latent heat. This combination would result in an effective reduction in solar heat gain. REVIEW performance, wellPEER as its impact on the indoor heat gain
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