Abstract: The closed cycle vapor turbogenerator (CCVT), called Ormat energy converter, with unique design, high quality, high reliability, less care, long service life, unmanned attendance, suitable to multi-fuels, and easy to install, which is one of the primary power equipment to be optimized in the hostile enviromment and the supply to be most widely used in the world, is mainly adopted in telecommunication, remote sensing, navagation, railroad, CP, SCADA system, and remote valve. Through analyzing the structure, operating principle, factors affecting the design, and application, the article stresses that CCVT is a most reliable power source in speeding up the construction of pipeline in the hostile environment.