Research And The Development Of Phase-Change Product

Nowadays, energy crisis and environmental pollution become more and more serious. It has become two important problems in social development. It is of necessary to develop and use renewable energy as well as take measure on environment protection and energy conservation.Energy storage technology can greatly improve energy utilization efficiency. Energy generation, exploitation, production and adoption have great time dependence, so we can use energy storage technology to improve the energy utilization efficiency and reduce the pressure of energy utilization. When the energy supply exceeds the need, we can use the technology to store the surplus, and release it at requested. Take phase-change thermal storage for instance, it will translate energy into heat energy, and store it for future use. So the technology of phase-change thermal storage can solve the contradiction of the balance of thermal energy's supply and demand. Phase-change thermal storage technology has promising prospect in solar energy utilization, peak-load shifting, reutilization of waste heat and exhaust heat, energy conservation in heating and air condition of industrial and agricultural architectures, aircraft and spacecraft, as well as in textile industry and so on. Now phase-change thermal storage technology has drawn the attention of the academia and industry as a new technology in saving energy.As a new form of energy utilization, however, phase-change thermal storage material itself has a lot of shortcoming such as overcooling precipitation, low thermal conductivity, and economical aspect etc. So it is why phase-change thermal storage technology isn't widely promoted and effectively applied.This paper aims at making use of and improving the disadvantages of phase changing materials. And combined with the knowledge of chemistry, thermodynamics and physiologic and hygiene, this paper studies and discusses the performance of trial-producing"phase-change thermal storage cushion"made by phase changing materials(PCM) by the way of keeping warm from traditional passive to actively adjusting temperature. There are two parts of contents for this research: one is the choice of materials; the other is designing and testing performance of the"phase-change thermal storage cushion". Firstly, presents the application of the phase changing materials and analyzes many kinds of materials. According to the phase changing temperature and latent heat based on DCS testing, stearic acid and NaH2OPO312H2O are chosen to as this paper's trial materials.This text studies the physical and chemical properties of stearic acid and NaH2OPO312H2O and their mutual action each other. Finally, the binary mixture of the two kinds of materials was chose to make up the phase-change thermal storage cushion. After abundant experiment, it is approved that the disadvantages of these two materials respectively can be got over when the two materials are mixed. Stearic acid in the mixture can be regard as nucleating agent because they have the same crystal structure. Meanwhile, the performance of heating conduction of stearic acid can be advanced due to the action of NaH2OPO312H2O. After analyzing the infrared spectrum, it can be concluded that two kinds of materials are physical mixing, as a result there are no effects on their high latent heating.The materials are packed, heating and forming design after analyzing the properties of these materials. Test the performance of heating and keeping warm of samples under different conditions by a great deal of experiment. Furthermore, analyze the stabilization of materials. The experimental results show good agreement with predicted effects. Therefore, there is meaning of market development.