| Title |
Evaluation about Dielectric Property of Heat Transfer Fluids for Fuel Cell Vehicle using Cylindrical Multi-Terminal Capacitive-Conductive Sensor |
| Authors |
김재훈(Kim, Jae-Hoon) ; 김주한(Kim, Ju-Han) ; 김윤형(Kim, Yoon-Hyung) ; 최강월(Choi, Kang-Wal) ; 한상옥(Han, Sang-Ok) ; 용기중(Yong, Gee-Joong) |
| Keywords |
FCEV ; Heat transfer fluid ; Cylindrical multi-terminal capacitive-conductive sensor ; Dielectric properties |
| Abstract |
We have developed a cylindrical multi-terminal capacitive-conductive sensor that could be attached to the internal surface of cooling system pipe to evaluate capacitance and conductivity of heat transfer fluid. It was used as measuring system to diagnose insulating condition, by which was kept a insulating resistance of inner stack and at the same time was cooled electrochemical heat of reaction of FCEV(fuel cell electric vehicle) stack that used a compressed hydrogen gas reacting with oxygen in accordance with variation on thermal degradation of nonconductive heat transfer fluid. Also to assess diagnosis characteristics of heat transfer fluid, i.e. coolant, we have performed accelerated aging test using developed sensor attached to cooling system. Consequently, it was measured dielectric and electric resistance of coolant to estimate and analyse for dielectric properties by degradation condition. |