Abstract: Flat plate solar collectors of water heating and air heating types have been widely studied for variety of utilizations. Water heaters are mostly of water recirculation types, their thermal efficiency curves are represented with the conventional equations and methods. However, for solar air heaters, mostly being without recycling of air and which performance is very much mass flow rate dependent, the conventional equations and methods for evaluating and representing their performance become not so valid and useful. This papers represents and discusses the way of evaluation of performance of solar air heater of conventional and novel types together with the nature of performance curves obtained thereof

• Publication Date: 13-Mar-2016
• DOI: 10.15224/978-1-63248-090-3-47
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Abstract: Tremendous amount of heat is being lost at the turbine area of an automotive turbocharger during its operation. Application of ceramic thermal barrier coating to components operating under severe temperature condition such as automotive turbocharger turbine volute casing can reduce the heat lost to the environment, improve the efficiency and reliability of components and extend their service life. But high cost of installation and maintenance, complexity and spallation problem due to thermal expansion mismatch between the ceramic and the metal substrate have seriously restricted the acceptance and widespread practice of ceramic thermal barrier coating. In the present study, a solvent based slurry functionally graded thermal barrier coating technique was employed in depositing different compositions of Yttria stabilized zirconia and nickel powders on a nickel alloy substrate using a simple laboratory-scale surface coating machine. The coating compositions of 25wt% YSZ & 75wt% Ni, 60wt%

• Publication Date: 13-Mar-2016
• DOI: 10.15224/978-1-63248-090-3-48
• Views: 0
• Downloads: 0