heat transfer CACRS HEN synthesis History of engineering & technology Keller-Box technique Li-ion battery MINLP ORC PIV measurements RNG k-? model Trefftz method abrasive-milling processes absorption chiller accident-tolerant fuel (ATF) cladding advanced exergo-economic analysis alternative process aspect ratio axial piston pump axisymmetric flow boiling canned motor casson fluid centralised heat pump computational fluid dynamics (CFD) computational intelligence techniques control crystallization dynamic modelling endogenous exergy energy poverty