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) |