A new concept composite heat exchanger to be applied in high-temperatureindustrial processes

new concept composite heat exchanger to be applied in high-temperatureindustrial processes Purchase $ 37.95 C. Luzzatto*, A. Morgana*, S. Chaudourne†, T. O'Doherty‡ and G. Sorbie§ * Ansaldo Ricerche, Corso Perrone 25, 16161, Genova, Italy † Centre d'Etudes Nucléaires de Grenoble—GRETh, 85 X-38041, Grenoble, Cedex, France ‡ University of Wales-College of Cardiff, P.O. Box 925, Newport Road, Cardiff, CF2 1YF, UK § Babcock Energy Ltd-Technology Centre, High Street, Renfrew, PA4 8UW, UK Available online 9 May 1998. Abstract A novel type of high temperature heat exchanger (HTHE) is presented where the main heat transfer parts are made out of CMC (ceramic matrix composite) materials; such HTHE is applicable to different industrial processes, ranging from chemical, to glass, to metallurgical and to waste incineration. Common features are gas-gas HTHE, chemically aggressive environments and high fouling, generally on the shell side. The arrangement is modular, and the single-module is based on seven bayonet tubes; a pseudo-cross-flow configuration is reached by means of ceramic baffles on the shell side. Design of the module is focused on the most severe thermodynamic conditions, among the aforesaid applications. Thermal and mechanical designs are presented, which have been performed by means of both commercial finite elements and developed ad hoc codes; these models have been validated through an experimental programme, the details of which are given here. The modularity of the design allows a reasonable scaling up, provided that some key technological barriers are overcome, such as availability of higher performance CMC materials, tube to tubesheet ceramic joints, heat transfer augmenting devices. Author Keywords: High temperature; process intensification; CMC materials; industrial processes; energy savings Article Outline