Chapter 311 - An Up-Date on the Thermoelectric Recovery of Low Temperature Waste Heat

Abstract

This chapter deals with an update on the thermoelectric recovery of low-temperature waste heat. Vast quantities of waste heat are discharged into the earth's environment, a large proportion of which is temperature of less than 150°C. Thermoelectric conversion is a reliable and environment friendly method of converting this waste heat into useful electrical power. In 1994, a research project has been underway at the NEDO Centre for Thermoelectric Engineering, Cardiff University, to develop this technology and construct prototype generators, which operate reliably and economically. In this chapter, an update is presented of progress made in the project. Thermoelectric technology can provide a means of recovering low-temperature waste heat. Finally, the development of high density thermoelectric modules has significantly improved the economic attractiveness of this technology to the point where it can economically compete with the conventional methods of power generation. The fabrication of modules from low-cost material possessing improved electrical power factors will further reduce costs. The modular construction of the generator readily lends itself to the construction of the larger systems.