Heat transfer experiment and structure optimization of longitudinal vertical finned tubes in natural convection

Tests the heat transfer performance of the finned tube in the test bed, obtains the heating capacity, heating capacity per unit weight and mental thermal intensity of three different finned tubes including opening, flatfaced closed and curvedfaced closed finned tubes with the same structural parameters. Gets the degree of influencing factors based on orthogonal test，and also achieves the optimum structure of finned tube.