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Table 4 Values of converging chromosome genes from the GTHA), and the optimum lens performance parameters from the statistical algorithm (Qandil and Zhao 2018) for the Stirling engine application

From: Application-based design of the Fresnel lens solar concentrator

Variable Value Source
\( L1 \) (\( \eta_{l} \)) Lens efficiency (initial guess) 0.95 GTHA
\( L2 \) (\( S \)) Sampling margin 0.10 GTHA
\( D_{l,0} \) Initial guess of lens diameter 1450 mm GTHA
\( L3 \) (\( D_{l} ) \) Lens diameter 1479 mm GTHA
\( L4 \) (f) Focal length 1331 mm GTHA
\( L5 \) (\( g \)) Number of grooves 333 GTHA
\( \dot{Q}_{f} \) Total focal energy received 1317.12 W Qandil and Zhao (2018)
\( T \) Lens transmittance 92.49% Qandil and Zhao (2018)
\( \eta_{l,a} \) Actual optical efficiency 93.95% Qandil and Zhao (2018)
\( \eta_{o} \) Overall lens efficiency 86.90% Qandil and Zhao (2018)