| Title |
Study on the Drag Reduction and Heat Transfer Efficiency Reduction of the Non-Ionic Surfactant |
| Authors |
조성환(Sung-Hwan Cho) ; 태춘섭(Choon-Seob Tae) |
| Keywords |
마찰저항 저감 ; 열전달효율 저감 ; 계면활성제 ; 압력강하 Drag reduction ; Heat transfer efficiency reduction ; Surfactant ; Pressure drop |
| Abstract |
The drag reduction(DR) and heat transfer efficiency reduction(HTER) of non- ionic surfactant according to the fluid velocity, temperature and surfactant concentration were investigated experimentally. For this study, several kinds of new surfactant which contains amine-oxide and betaine were developed. And experimental apparatus equipped with two water storage tanks temperature controlled, pumps, testing pipe network, two flowmeters, two pressure gauges, heat exchanger, and data logging system was built.
Results showed that existing alkyl ammonium surfactant(CTAC) had DR of 0.6∼0.8 for 1,000∼2,000ppm in fluid temperature of 50∼60℃ and had very low DR in fluid temperature over 70℃. And new amine oxide and betaine surfactant(SAOB) had lower DR in fluid temperature of 50∼60℃ compared with CTAC but in fluid temperature of 70∼80℃ DR was 0.6∼0.8 for 1,000∼2,000ppm. |