Abstract—The purpose of this paper is to comparatively analyse heat transfer and pressure drop characteristics of Double pipe heat exchanger with augumentation techniques like turbulator, nano particle suspension, fins on inner rotating tube, triple concentric pipe and enhanced tubes concept. This paper features a broad discussion and comparative study on various techniques for improving heat transfer coefficient for double pipe heat exchanger. The motivation for heat transfer enhancement is discussed, and the principles behind heat exchangers are summarized. For well over a century, efforts have been made to produce more efficient heat exchangers by employing various methods of heat transfer enhancement. The study of enhanced heat transfer has gained serious momentum during recent years, however, due to increased demands byindustry for heat exchange equipment that is less expensive to build and operate than standard heat exchange devices. Savings in materials and energy use also provide strong motivation for the development of improved methods of enhancement. In the present review we are focusing upon passive techniques which causes heat transfer enhancement.