Simple Performance Prediction Method for Stirling Engine

Simple Performance Prediction Method for Stirling Engine ver. 1.8J
Koichi Hirata (31 March, 1998)

How to use this method

(1) Please input or select a mean pressure, a swept volume, gas temperatures and a kind of the working gas on the calculated condition.
(2) When the engine is operated at the design pressure and the permitted temperature (maximum temperature), please check 'Use the design and permitted values'.
(3) If not so, please check 'Do not use the design and permitted values' and input the design pressure and the permitted temperature.
(4) Please click 'START'.
(5) Maximum output power and the engine speed when the engine get the maximum output power are calculated under my experimental equations.

Calculated condition

Mean pressure, Pm: (MPa)

Swept volume of expansion space, Vse: (cm3)

Gas temperature of expansion space, Te: (deg C)

Gas temperature of compression space, Tc: (deg C)

Working gas,

He
Air
N2
H2

Use the design and permitted values (You need not input following values.)
Do not use the design and permitted values (You must input following values.)
Design pressure, Plim: (MPa)

Permitted temperature, Tlim: (℃)

<-- Click here after input all calculated conditions!

Calculated results

Viscosity coefficient, lim: (m2/s)

Gas constant, R: (J/kgK)

Non-dimentional engine specification, S*:

Non-dimentional output power, Ls*:

Non-dimentional engine speed, n*:

Maximun output power, Ls: (W)

Engine speed, N: (rpm)

Beale number, Bn:

West number, Wn:

* In the case of the high temperature difference Stirling engines, a standard value of Beal number is 0.15.
* A standard value of West number is from 0.25 to 0.35.

Additional information

Outline of this calculated method
 Difference from former methods

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All Right Reserved, Copyright(C), 1997, Koichi Hirata

Koichi Hirata (khirata@gem.bekkoame.ne.jp)