What is the R-value of insulation on your beer brewhouse, beer fermentation tank(FV) and beer bright tank(BBT)?
R-value represents the insulation material’s ability of stopping heat being lost. The higher R-value means the higher performance. Here we have a formula to get R-value. R=H/λ.
H means the thickness of the insulation layer. λ means the thermal conductivity.
The average λ-value of rock wood is 0.04w/m.k, while Polyurethane(PU) is 0.025w/m.k. For our brewhouse, we use 80mm rock wool as insulation layer.
According to R=H/λ. The R-value is 2
For the FV and BBT, we use 80mm Polyurethane(PU). The R-value is about 3.2
You can see PU has higher R-value than rock wood. But rock wool has higher temperature resistance than PU. That is why we use rock wool on brewhouse while PU is on FV and BBT.
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