1552 Energy Savings Calculations

The following procedure shows how to estimate the energy cost savings resulting from installing thermal insulation.

Procedure

STEP 1. Calculate present heat losses (Qjpres). You can use one of the following methods to calculate the heat losses of the present system:

• Heat flow equations. These equations are in Section 15.4.2.

• Graphical method. Consists of Steps 1, 2 and 2a of the graphical method presented in Section 15.4.3.

• Table values. Table 15.8 presents heat losses values for bare surfaces (dull metals).

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