What is the technological development of cyclopentane in place of F11?

　　Although cyclopentane substitution schemes have been widely used, the schemes of n-pentane and isopentane have been implemented because of their high thermal conductivity, limited resources and high price. The foaming strength and fluidity of n-pentane and isopentane are better. The thermal conductivity of n-pentane and isopentane is higher, but they are rich in resources and low in cost. Doctor-Siemens Refrigerator Factory is now using a mixture of n-pentane and isopentane instead of cyclopentane as foaming agent, which can reduce the cost by 8%; For the mix of n-pentane and isopentane foaming with R600a as refrigerant, the refrigerator"s overall energy consumption can be maintained at the level of F11+R12. This is a welcome message for our country, because our country currently depends on the import of cyclopentane, the price is very expensive, and our country is rich in n-pentane and isopentane resources, should strive to develop this program.
　　The cyclopentane production line of European plant adopts partial intrinsic explosion-proof in production links and circulating ventilation in the whole workshop, so the cost is high. The cyclopentane production lines of Hitachi, Panasonic, Sanyo and Panasonic in Wuxi, Japan adopt the closed explosion-proof safety system with mixing section, box body and door foamer, while the whole workshop does not have explosion-proof ventilation facilities, which is low cost and easy to maintain. This is desirable for the new cyclopentane production line.