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 discussed. After it a brief over view of the research work is presented then modelling and simulation of spiral coil heat exchanger using MS-Excel is done.