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	Volume 4, Issue 3 Pg 189 - 280 (October 2010)
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JP Journal of Heat and Mass Transfer

(or the cold-side heat exchanger

the MEF and the power-output at the MEF condition increase. The thermal efficiency at the MEF condition is lower than the maximum thermal efficiency that can be obtained. For a fixed

the thermal efficiency at the MEF condition increases dramatically at lower

while it increases slightly at larger

In addition, the thermal efficiency at the MEF condition gets larger as

becomes greater. When the sum of

and

is fixed, the variation of the thermal efficiency at the MEF condition for various

ratio is not obvious.

JP Journal of Heat and Mass Transfer
Volume 4, Issue 1, Pages 95 - 112 (February 2010)

ECOLOGICAL OPTIMIZATION FOR AN ATKINSON ENGINE
Jiann-Chang Lin

Abstract:
In this study, performance analysis and ecological optimization for an Atkinson engine with constant-temperature reservoirs are conducted. The ecological objective function is defined as the power-output minus the loss rate of availability. The parameters that maximize the ecological objective function and make the performance optimum are investigated. The results show that a maximum ecological function (MEF) exists and the corresponding power-output at the MEF condition is slightly lower than the maximum power-output. With the increase of the number of transfer units of the hot-side heat exchanger