Optimum operation of irreversible Carnot heat engines of finite size at maximum power output

Journal Article · Mon Apr 01 04:00:00 UTC 1996 · Energy Sources

DOI:https://doi.org/10.1080/00908319608908771· OSTI ID:253777

Oezkaynak, S ^[1]

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1. Turkish Naval Academy, Istanbul (Turkey). Dept. of Mechanical Engineering

In this article the author considers the optimum performance at the maximum power output of internally and externally irreversible heat engines of finite size in which heat transfer is proportional to the difference of temperature to an n-power. For the case n = 1, where heat transfer is Newtonian heat conduction, the hot-end/cold-end heat-exchanger size ratio is less than unity. For the case n = 4, which corresponds to radiative heat transfer, the values of design parameters are obtained from the numerical solution of two coupled nonlinear equations. For a radiative heat engine of finite size, the upper limit to the optimum efficiency at maximum power output is found to be 0.339.

• Sponsoring Organization: USDOE
• OSTI ID: 253777
• Journal Information: Energy Sources, Journal Name: Energy Sources Journal Issue: 3 Vol. 18; ISSN 0090-8312; ISSN EGYSAO
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
CARNOT CYCLE
HEAT ENGINES
HEAT EXCHANGERS
MATHEMATICAL MODELS
OPTIMIZATION
PERFORMANCE
RADIANT HEAT TRANSFER
THERMAL EFFICIENCY