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บทคัดย่อ

The Protection of Heat Flow through Common Brick Wall Related to Natural Ventilation in Building

The goal of this research is, maximizing thermal resistance of brick wall with cement mortar in Thailand by installing insulations at exterior side. The selected insulations are: glass fiber, rice husk, polystyrene foam, and air gap with aluminum foil. The test cells can be closed and opened in 4 modes as, all time closing, all time opening, daytime opening nighttime closing, and daytime closing nighttime opening. The result shows, common brick wall with polystyrene foam has more thermal efficient than other materials, brick wall with rice husk insulation and brick wall with glass fiber have the same efficient but rice husk has more thermal absorption than other materials. The common brick wall with air gap and aluminum foil is the least density of all insulation hence, temperature in this test cell is conforming to air temperature. In ventilation part, the common brick wall with all exterior insulation has the most efficient if they are closed in daytime and opened in nighttime because the inside test cell temperatures are close by human comfort temperature.