Large amounts of energy from heat sources such as waste-heat and geothermal
energy are available worldwide but their potential for useful power-generation is
largely untapped. This is because they are relatively low temperature difference
(LTD) sources, in the range from 100 to 200 C, and it is thermodynamically
difficult, for theoretical and practical reasons, to extract useful work at these temperatures.
This work explores the suitability of a Stirling engine (SE) to exploit
these heat sources. Elsewhere much work has been done to optimise Stirling engines
for high temperature heat sources, but little is known about suitable engine
layouts, and their optimal design and operational aspects at lower temperature
differences. With the reduced temperature difference, changes from conventional
engine designs become necessary and robust solutions for this novel application
have to be identified.
Large amounts of energy from heat sources such as waste-heat and geothermalenergy are available worldwide but their potential for useful power-generation islargely untapped. This is because they are relatively low temperature difference(LTD) sources, in the range from 100 to 200 C, and it is thermodynamicallydifficult, for theoretical and practical reasons, to extract useful work at these temperatures.This work explores the suitability of a Stirling engine (SE) to exploitthese heat sources. Elsewhere much work has been done to optimise Stirling enginesfor high temperature heat sources, but little is known about suitable enginelayouts, and their optimal design and operational aspects at lower temperaturedifferences. With the reduced temperature difference, changes from conventionalengine designs become necessary and robust solutions for this novel applicationhave to be identified.
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