Our main objective in the present work is to elaborate the characteristics of heat transport and magneto-hydrodynamics (MHD) finite film flow of human blood with Carbon Nanotubes (CNTs) nanofluids over a stretchable upright cylinder. Two kinds of CNTs nanoparticles, namely (i) SWCNTs (single walled carbon nanotubes) and (ii) MWCNTs (multi walled carbon nanotubes), are used with human blood as a base liquid. In addition, a uniform magnetic field (B) has been conducted perpendicularly to the motion of nanoliquid. The transformation of the partial differential structure into a non-linear ordinary differential structure is made by using appropriate dimensionless quantities. The controlling approach of the Homotopy analysis method (HAM) has been executed for the result of the velocity and temperature. The thickness of the coating film has been kept variable. The pressure distribution under the variable thickness of the liquid film has been calculated. The impacts of different variables and rate of spray during coating have been graphically plotted. The coefficient of skin friction and Nusselt number have been presented numerically. In addition, it is noticed that the thermal field of a nanoliquid elevates with rising values of ϕ and this increase is more in SWCNTs nanofluid than MWCNTs nanofluid.

The aim of this study was to conduct thermodynamic and economic analyses of a concentrated solar power (CSP) plant to drive a supercritical CO₂ recompression Brayton cycle. The objectives were to assess the system viability in a location of moderate-to-high temperature solar availability to sCO₂ power block and to investigate the role of thermal energy storage with 4, 8, 12, and 16 hours of storage to increase the solar share and the yearly energy generating capacity. A case study of system optimization and evaluation is presented of a city in Saudi Arabia. To achieve the highest energy production per unit cost, the heliostat geometry design integrated with a sCO2 Brayton cycle with a molten salt thermal energy storage (TES) dispatch system and corresponding operating parameters are optimized. A solar power tower (SPT) is a type of CSP system that is of particular interest in this research because it can operate at relatively high temperatures. The present SPT-TES field comprises of heliostat field mirrors, a solar tower, a receiver, heat exchangers, and two molten-salt TES tanks. The main thermo economic indicators are the capacity factor and the levelized cost of electricity (LCOE). The findings indicate that SPT-TES with a supercritical CO₂ power cycle is economically viable with 12 hours thermal storage using molten salt. The results also show that integrating of 12 hours-TES with a SPT has a high positive impact on the capacity factor of 60% at the optimum LCOE of $0.1078/kWh.