Designing and manufacturing high-efficiency heat exchangers is usually considered a limiting factor in the development of gas turbines employing either heat recovery Joule–Brayton cycles or external combustion. In this work, an innovative heat exchanger is proposed, modeled, and partially tested to validate the developed numerical model employed for its design. The heat exchanger is based on an intermediate medium (aluminum oxide ) flowing in countercurrent through an hot stream of gas. In this process, heat can be absorbed from the hot gas, temporarily stored, and then similarly released in a second pipe, where a cold stream is warmed up. A flow of alumina particles with very small diameter (of the order of hundreds of microns) can be employed to enhance the heat transfer. Experimental tests demonstrate that simple one-dimensional steady equations, also neglecting conduction in the particles, can be effectively employed to simulate the flow in the vertical part of the pipe, namely, to compute the pipe length required to achieve a prescribed heat exchange. On the other side, full three-dimensional computational fluid dynamics simulations have been performed to demonstrate that a more thorough gas flow and particle displacement analysis is needed to avoid a bad distribution of alumina particles and, thus, to achieve high thermal efficiency.
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e-mail: catalano@poliba.it
e-mail: debellis@imedado.poliba.it
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March 2011
Research Papers
An Immersed Particle Heat Exchanger for Externally Fired and Heat Recovery Gas Turbines
Luciano Andrea Catalano,
Luciano Andrea Catalano
Department of Mechanical and Management Engineering,
e-mail: catalano@poliba.it
Polytechnic of Bari
, Italy
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Fabio De Bellis,
Fabio De Bellis
Department of Mechanical and Management Engineering,
e-mail: debellis@imedado.poliba.it
Polytechnic of Bari
, Italy
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Riccardo Amirante,
Riccardo Amirante
Department of Mechanical and Management Engineering,
e-mail: amirante@poliba.it
Polytechnic of Bari
, Italy
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Matteo Rignanese
Matteo Rignanese
Department of Mechanical and Management Engineering,
e-mail: me1810@hotmail.it
Polytechnic of Bari
, Italy
Search for other works by this author on:
Luciano Andrea Catalano
Department of Mechanical and Management Engineering,
Polytechnic of Bari
, Italye-mail: catalano@poliba.it
Fabio De Bellis
Department of Mechanical and Management Engineering,
Polytechnic of Bari
, Italye-mail: debellis@imedado.poliba.it
Riccardo Amirante
Department of Mechanical and Management Engineering,
Polytechnic of Bari
, Italye-mail: amirante@poliba.it
Matteo Rignanese
Department of Mechanical and Management Engineering,
Polytechnic of Bari
, Italye-mail: me1810@hotmail.it
J. Eng. Gas Turbines Power. Mar 2011, 133(3): 032301 (7 pages)
Published Online: November 15, 2010
Article history
Received:
April 13, 2010
Revised:
April 27, 2010
Online:
November 15, 2010
Published:
November 15, 2010
Citation
Catalano, L. A., De Bellis, F., Amirante, R., and Rignanese, M. (November 15, 2010). "An Immersed Particle Heat Exchanger for Externally Fired and Heat Recovery Gas Turbines." ASME. J. Eng. Gas Turbines Power. March 2011; 133(3): 032301. https://doi.org/10.1115/1.4002157
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