The heat transfer performance of syngas cooler influences the efficiency of the power generating system with combined coal gasification cycle (CCGC) undeviatingly; it is critical to achieving the heat transfer characteristics of high-pressure syngas in the cooler. Heat transfer in convection cooling segment of pressurised coal gasifier with the membrane helical coils and serpentine membrane tubes heat exchanger under high pressure is empirically, and numerically (Computational Fluid Dynamics) examined.In Coal Mines, Underground Mines, Mineral Ore Mines syngases at high pressure and high temperature obtained in large quantities. This syngas is profoundly poisonous, noxious and combustible gas which will be present in an atmosphere which may cause several accidents. Hence it is necessary to reduce the content of syngas from mines in the atmosphere with the help of the heat exchanger with membrane helical coil and serpentine membrane tubes. So this research book will be helpful for those who are working in the domain of a coal mine, underground mines and mineral ore mines.