Thesis - Open Access
Master of Science (MS)
A criterion for comparing the relative performance of various heat transfer augmentation methods used in heat dissipating systems is introduced. The analysis is based on the principle of minimizing the rate of total entropy generation. The heat transfer load (HTL), a parameter determined by the operating requirements of the heat dissipating process and which indicates the difficulty of the heat transfer duty to be perfomed [sic], is defined in the present study. By comparing the irreversibility distribution ratio (ϕ) of various configurations at a given heat transfer load, the most exergy (available energy) efficient system can be selected. The data for three different types of fin configurations used in two common heat dissipation applications (electronic equipment and turbine blade cooling) are utilized in demonstrating the technique. The results indicate which specific fin geometry of the particular configuration type analyzed will transfer the dissipated heat at the specified base surface temperature while requiring the least pumping power. Although the ϕ vs. HTL criterion is applied to extended surfaces only in this study, the method can be extended to many other applications such as jet impingement cooling or mass transfer.
Library of Congress Subject Headings
Heat sinks (Electronics)
Heat -- Transmission
Number of Pages
South Dakota State University
Wilcoxon, Ross, "Second Law Analysis in Assessing Heat Dissipating Systems" (1990). Electronic Theses and Dissertations. 5360.