Study on Cryogenic Heat Transfer Features and High Efficient CoolingTransfer Application of PVC Pipe
LI Fang-zheng
ZHANG Song
CUI Bing-bing
DING Hang
Abstract：In order to investigate the feasibility of low temperature brine transportation with PVC pipe,a temperature stress test was passed under the constraint condition of the PVC pipe,the low temperature shrinkage strain increased law and linear expansion coefficient of the PVC pipe were obtained and could provide the basis to the design of the shrinkage joint in the low temperature pipeline.Then a numerical simulation was conducted on the cross-section temperature field of the PVC pipeline.The results showed that within 20 days before the freezing operation,the temperature of the PVC brine pipe wall would be distributed in a logarithm law with the time passed and the outer wall temperature would be 3~12 ℃ higher than the brine temperature within the pipeline.In comparison with the steel pipe under the same condition,the central point temperature of the PVC pipe thermal insulation layer would be 1.5~4 ℃ higher than the steel pipe.When the low temperature brine was transported with the PVC pipeline,a temperature difference per 1 000 m would be less than 0.5℃ and a dissipated value of the cooling capacity would be only about 42.3% of the steel pipe under the same condition.Thus the energy saving effect of the PVC pipeline was obvious and the promotion and application would be valuable.
Keywords：PVC pipebrine main pipehigh efficient cooling transportationtemperature fieldwater tightness
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 18-23 )