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This book deals with the modeling and simulation of spiral coil heat exchanger, one of the most promising compact heat exchanger. Its design provides the advantages of high turbulence, high heat-transfer coefficients and high fouling resistance. High heat-transfer coefficients allow smaller heat-transfer areas compared to traditional shell-and-tube heat exchangers used for the same duty. This ultimately results in significant size reductions and weight savings as less material is needed to construct the unit.In this book firstly various type of compact heat exchanger used in industries are...

Animals are very important part of our biodiversity. They are the living part of our colorful nature and have always fascinated human imaginations and figure abundantly in literature and art and craft. Pakistan has 188 species of mammals, 670 species of birds, 185 species of reptiles, and 22 species of amphibians. In this study, biology and behavior of Nilgai, Chinkara, Hog Deer, Blackbuck and Chital was studied at the Safari Park and Karachi Zoo. It was observed that captive animals develop different kind of behaviour depending upon the environment provided. Safari Parks and Zoos have a...