Experimental Study On Cold Storage Of Phase Change Emulsion

Along with economic development and the improvement of living standard, cities often appear electricity tension in peak period and electricity excess in valley period, the wide use of air conditioning is one of the main factors. The application of cold storage technology which can reduce air conditioning electricity consumption in peak period is an effective method for peak shift. Cold storage air-conditioning systems have been in the spotlight because they can flat the electric power load curve in the daytime in summer. It can reduce the power grid peak and air conditioning load capacity, has important practical significance and application value.Hydrate cold storage is characterized by its proper phase change temperature(5-12℃) and high energy storage density. However, when using hydrates, long induction time and large supercooling degree often occur. To solve the above problems is the key for nano-emulsion cold storage application. This paper probes into the nano-emulsion’s promotion of hydrate storage function.In order to promote refrigerant hydrate formation rapidly in static system, cyclopentane emulsion and R141 b emulsion were obtained by high-shear stirring with surfactants and cosurfactants. Selecting the suitable surfactant, the best concentration, emulsifying time and stirring speed is important, hydrate can form quickly in emulsion. The experiments have shown that the stability and storage performance of R141 b emulsion is far better than cyclopentane emulsion. The effect of nanoscale particle size and concentration of nanofluid on hydrate formation is also investigated. It enhance hydrate formation and cold storage performance in nano-emulsion.The experiments of hydrate formation are done in a cold storage set up. The hydrate formation are analyzed through observation and T-t curve. Hydrate formation induction time, super-cooling degree and cold storage quantity are improved in emulsion or nano-emulsion compared to that in pure water. R141 b hydrate can form quickly in static system with emulsion, especially nano-emulsion.