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This paper examines the characteristics of internally healed concrete employing eco-materials Spinacea Oleracea (SO) and Calatrop is Gigantea (CG) as self-healing agents to the performance of concrete using a widely viable self-heal chemical, polyethylene glycol. Eco-friendly self-cured materials like Spinacea Oleracea and Calatrop is Gigantea, as well as chemical self-cured materials like polyethylene Glycol, are added in varied concentrations (0.2% to 1% by mass of cement). The optimal doses of the aforementioned self-healing agents are identified according to the concrete's compressive strength. The optimal concentrations for each self-healing agent are used to conduct studies on their durability. This investigation employs M30 grade concrete in which 25% of the cement weight has been replaced with fly ash. The test findings revealed that eco-friendly self-curing material concrete outperformed traditional concrete in terms of workability, as well as its strength and durability. [ABSTRACT FROM AUTHOR]

In R600a refrigerator many parameters focussed to improve the efficiency in that energy demand is a crucial consideration. This system employs a new approach of adopting nanolubricants to address that challenge and waste less energy. Experiments were conducted with focus on factors such as cooling capacity, compressor power consumption and Coefficient of performance. This research is centred on graphene oxide nanolubricants with varied concentrations. In R600a with graphene nanolubricants vapour compression refrigeration system resulted in a 38% Coefficient of Performance enhancement, cooling capacity is improved and less utilization of compressor power. The fuzzy logic prediction values for COP are obtained using MATLAB. [ABSTRACT FROM AUTHOR]

Gas turbine vane cooling plays an important role for increasing the thermal performance of engine. In present computational analysis gas turbine vane is cooled internally passing coolant through ribbed passages, the effect of coolant flow in rib turbulators has been simulated by ANSYS FLUENT. The temperature contours of vane are observed by varying the mass flow of air through passages and results were compared. The heat transfer characteristic such as Nusselt number, Heat transfer coefficient and skin friction coefficient are noted. It observed that cooling performance increases by increasing mass flow rate, but pressure loss increases at high mass flow rates and it's not feasible to have high flow for ribbed passages. [ABSTRACT FROM AUTHOR]