| Autor: |
Bradley, C. B., Ernst, C. E., Paschkis, V. |
| Zdroj: |
Journal of Fluids Engineering; February 1945, Vol. 67 Issue: 2 p93-100, 8p |
| Abstrakt: |
Economic thickness of an insulation is defined as that thickness yielding the smallest sum of cost of heat loss and fixed cost of insulation. The difficulties in determining the economic thickness for intermittent operation are reviewed. By means of the electrical-analogy method, curves have been developed which permit the ready determination of the heat losses in intermittent operation for any temperature, any single-material wall, any intermittency, any length of period, and any film conductance. These curves permit the determination of the economic thickness for intermittent operation. The application of the curves is illustrated by an example. The influence of intermittency on the economic thickness is discussed for one specific case. The limitations of the method and prospect of obtaining results avoiding the limitations are considered. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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