Abstract:
The concentration of a fuel and the heat removal rate of a heat exchanger are controlled simultaneously in order to maintain the temperature of a fuel cell stack at a target value, thereby maintaining the concentration of the fuel at a target value. Further, by appropriately responding to exterior temperature changes or fuel cell performance changes, the concentration of a liquid fuel can be controlled more quickly and accurately than existing sensor-less concentration controllers while simultaneously improving the stability of fuel cell operation and the efficiency of a system.
Abstract:
고분자섬유를일부탈할로겐화한후에, 열처리를통하여다공성탄소나노튜브를제조한후, 얻어진탄소나노튜브를이용하여비귀금속촉매나비금속촉매를제조한다. 이에따라기공이고르게발달된다공성의전기화학반응용비귀금속및/또는비금속촉매를제조할수 있다. 해당촉매는전기화학반응전극에서반응물의물질전달속도를향상시켜서전기화학반응전극의성능증가를가져올수 있다.
Abstract:
고분자섬유를일부탈할로겐화한후에, 열처리를통하여다공성탄소나노튜브를제조한후, 얻어진탄소나노튜브를이용하여비귀금속촉매나비금속촉매를제조한다. 이에따라기공이고르게발달된다공성의전기화학반응용비귀금속및/또는비금속촉매를제조할수 있다. 해당촉매는전기화학반응전극에서반응물의물질전달속도를향상시켜서전기화학반응전극의성능증가를가져올수 있다.
Abstract:
연료전지스택의온도를목표치에맞게유지할수 있도록연료의농도와열교환기의열 제거속도를동시에조절하여연료의농도를목표치대로일정하게유지할수 있다. 또한, 외부온도변화나연료전지성능변화에대해서도적절히대응하므로써, 연료전지운전의안정성과시스템의효율을동시에높이면서도기존의무센서농도제어기보다빠르고정확하게액체연료의농도를제어할수 있다.