| With the energy problems becoming more and more severe around the world, the excessive consumption of energy has become one of the major issues, which people have to face. China, as a developing country, its economic got a great improvement, which is benefit from the rapid development of national industry, which also make energy problems exposed. People dependencies of energy are becoming more and more irreplaceable, which realize us that the energy crisis has become one of the problems we cannot be ignored. The energy can be stored by phase change heat storage technology, which can reduce or even avoid unnecessary waste of energy. It is one of the effective means to relieve the energy crisis. The heat phase change storage technology own a large heat storage density, when the heat supply discontinuous or heat supply and demand come to a imbalance, the phase change heat storage technology will ensure the stability of the heat output and storage, but the coefficient of thermal conductivity of phase change materials tend to be low, which become the key factor hindering the development of the phase change heat storage technology, so on the strengthening of the heat transfer process in order to improve the deficiency of phase change heat storage technology become key research direction. It includes the regenerator structure and the study of the regenerative process under different operating conditions.Using the combination of enhanced heat transfer technology and the two phase change heat storage technology, by increasing heat transfer coefficient of the heat exchanger, enlarging heat transfer area and magnifying the average temperature difference between phase change materials and heat carrier of heat exchanger, which make the melting time of the phase change materials shorter and improve the efficiency of phase change heat transfer. In this paper, we investigated technology for strengthening finned tube, developed a new type of finned tube, established the 3D model and simulated the physical model. We researched the melting process of phase change materials using FLUENT software.The main research and conclusion:(1) We developed a new type of Y type longitudinal finned tubes and established a 3D model.(2) We investigated Y type longitudinal finned tubes that we developed by simulation and compared the tube to flat finned tube for heat exchanger results.(3) We optimized Y type finned tube model that we developed and the boundary conditions of numerical simulation. In addition, we investigated the fin numbers, thickness, and the size of the front opening Angle and made the contrast numerical simulation about inlet velocity of different heating media.(4) The results showed that heat transfer effect of Y type longitudinal finned tubes that we came up with in this paper is better than the tube and peace straight fin tube, and it greatly shorten the melting time of phase change materials.(5) We confirmed the optimal model and the optimal boundary conditions through the research of front opening Angle fin Numbers, thickness, size and the inlet velocity of heating medium. |
