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Light bulb heat exchanger for magnetohydrodynamic generator applications - Preliminary evaluationThe light-bulb heat-exchanger concept is investigated as a possible means of using a combustion heat source to supply energy to an inert gas MHD power generator system. In this concept, combustion gases flow through a central passage which consists of a duct with transparent walls through which heat is transferred by radiation to a radiation receiver which in turn heats the inert gas by convection. The effects of combustion-gas emissivity, transparent-wall-transmissivity, radiation-receiver emissivity, and the use of fins in the inert gas coolant passage are studied. The results indicate that inert gas outlet temperatures of 2500 K are possible for combustion temperatures of 3200 K and that sufficient energy can be transferred from the combustion gas to reduce its temperature to approximately 2000 K. At this temperature more conventional heat exchangers can be used.
Document ID
19740010444
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Technical Note (TN)
Authors
Smith, J. M. (NASA Lewis Research Center Cleveland, OH, United States)
Hwang, C. C. (Pittsburgh Univ. Cleveland, OH, United States)
Seikel, G. R. (NASA Lewis Research Center)
Date Acquired
September 3, 2013
Publication Date
March 1, 1974
Subject Category
Thermodynamics And Combustion
Report/Patent Number
E-7593
NASA-TN-D-7534
Accession Number
74N18557
Funding Number(s)
PROJECT: RTOP 503-10
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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