Numerical Simulation About Thermal Energy Storage Process Of Serpentine Tube Energy Storage

In the21st century, the energy problem is becoming shackles restricting economic and technological development. To maximize the improvement of energy efficiency and conserve energy usage has become the consensus of the people. In recent years, many new energy saving technology appear at home and abroad. Storage technology which widely is used in the field of industrial waste heat and building, air-conditioning is a good prospect, a low investment, a small environmental impact and a clean energy technology.The energy storage mode is divided into sensible heat energy storage, phase change energy storage and chemical energy storage. Through using the latent heat stored energy, phase change energy storage which is the point of focus of the study and development of energy storage technology has a large volume of energy storage density the advantages of energy and can be necessary to obtain a constant temperature. But because of variable physical parameters which are caused by the phase change energy storage process, it makes the type of heat transfer research more difficult. At present, the process of the establishment of the heat transfer model can only be through a number of assumptions and simplifications. The conclusion often has huge difference between the reality and simulation. It also has been the research difficulty of the energy storage technology.As a mature technology equipment, the serpentine tubes is widely used. It has many advantages including simple processing, mature technology, easy to clean and adaptable. It is very simple to processing, convenient to be able to be cleaned and easy to adapt to project. It has a good effect of heat transfer to the heating or cooling of the high viscosity fluid. Because of the serpentine tube heat exchanger in the structure having good elasticity, the destruction of dropout by thermal stress bring about less affected. So to study the serpentine tube phase change energy storage has practical significance.In this paper, a mathematical model which is based on simplifying assumptions is set up by researching the serpentine tube heat exchanger and phase change material melting heat transfer theory. Depending on the model boundary conditions, the numerical simulation is executed by using fluent software. To analyze the type accumulator by changing the size parameters of the serpentine heat transfer tubes. To Select a set equipment which can meet the economic rationality and the engineering requirements by referring to the principle of economy. Finally, according to the simulation results, we produce the experimental equipment used for experimental verification. The study also found little effect on natural convection heat transfer to the melting process of the phase change material. The findings for the design and optimization of phase change energy storage device have a guiding role.