Heat losses QTsamngs Qjpres Qrlns

STEP 5. Estimate fuel cost savings. Estimate the amount of fuel used to generate each Btu wasted and use this value to calculate the energy cost savings. With this savings, you can evaluate the insulation investment using any appropriate financial analysis method (see Section 15.5.3).

Example. For the example presented in section 15.4.3, determine the fuel cost savings resulting from insulating the pipe with 3-1/2 in. of calcium silicate.


• Pipe data: 4-in pipe operating at 700°F in an 85°F ambient temperature.

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