Economic Thickness of Insulation

SlafT Ho lo Deternane Economic Thickness of Insulation. Thermal Insulation Manutacturers Association. Ml. Kivcn. New York. NY. [Revised periodically). Turner. W.C. and J.F. Mtdloy Thermal insulation, Krtcger Publishing Company. Melbourne. FL. 1991). 

Derive an expression for the optimum economic thickness of insulation to put on a flat surface if the annual fixed charges per square foot of insulation are directly proportional to the thickness, (a) neglecting the air film, (b) including the air film. The air-film coefficient of heat transfer may be assumed as constant for all insulation thicknesses. 

Optimum economic thickness of insulation, in., for nominal. pipe diameter of... 

The optimum or economic thickness of insulation is determined by optimizing the cost of energy and the costs of insulation. A discounted-cash flow analysis of insulation economics must be conducted using appropriate costs for investment and amortization periods. Insulation for energy conservation is an excellent investment and when optimized, a balance between investment and savings will be obtained. 

However, the economic thickness of insulation (ETI) concept is still quite simple. Economic thickness is defined as that thickness of insulation at which the cost of the next increment is just offset by the energy savings due to that increment over the life of the project (see Eig. 5.173.). 

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