Applicability of heat transfer equations to hydrogen combustion |
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| Institution: | 1. Department of Energy Science and Engineering, Musashi Institute of Technology, 1-28-1, Tamazutsumi, Setagaya-ward, Tokyo 158-8557, Japan;2. Graduate School, Musashi Institute of Technology, 1-28-1, Tamazutsumi, Setagaya-ward, Tokyo 158-8557, Japan;1. Department of Energy and Fluid Mechanics Engineering, University of Valladolid, Paseo del Cauce 59, E-47011, Valladolid, Spain;2. CIDAUT Foundation, Parque Tecnológico de Boecillo P.209, E-47151 Boecillo, Valladolid, Spain;1. Graduate Program in Chemical Engineering, Universidade Federal de Santa Maria, Brazil;2. Mechanical Engineering Department, Universidade Federal de Santa Maria, Brazil;1. Mechanical and Aerospace Engineering, Center for Advanced Turbomachinery and Energy Research, University of Central Florida, Orlando, FL 32816, USA;2. Clean Combustion Research Center, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia |
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| Abstract: | Previous research by the authors showed that hydrogen combustion exhibits a higher cooling loss to the combustion chamber wall of an internal combustion engine compared to hydrocarbon combustion because of its higher burning velocity and shorter quenching distance. The high cooling loss means that reduction of the cooling loss is essential to establish a high thermal efficiency in hydrogen combustion engines. This research analyzed the applicability of equations to describe the heat transfer from burning gases to hydrogen combustion. The result shows that equations calculate a lower cooling loss than experimental values, and the use of correction coefficients does not accurately define the actual cooling rate. It is therefore concluded that the derivation of a new heat transfer equation for hydrogen combustion is necessary to improve the thermal efficiency of hydrogen fuelled engines. |
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