수소연료전지용 솔레노이드 밸브의 코일 발열에 의한흡인력의 평가 (Evaluation of Attraction Forces due to Coil Heating of a Solenoid Valve for a Hydrogen Fuel Cell)

서지정보

· 발행기관 : 한국기계가공학회
· 수록지 정보 : 한국기계가공학회지 / 23권 / 7호 / 111 ~ 117페이지
· 저자명 : 박형준, 강효림, 한승호

초록

Solenoid valves convert electrical signals into electromagnetic energy and output it as mechanical kineticenergy to control the flow rate of a working fluid by opening and closing a valve. They provide fastdynamic response characteristics, making them applicable in automotive and aerospace fields that utilizehydrogen fuel cells. To ensure a stable supply of gaseous hydrogen to the fuel cell stack, solenoid valvesrequire a sufficient attraction force to open the valve in high-differential pressure environments. This attractionforce is generated by electromagnetic force in the coil bobbin, but the heat generated by the coil owing toapplied currents can lead to a decrease in the attraction force. This may hinder the opening of the valve.
Hence, it is important to estimate the attraction force associated with the temperature rise of the coil. In thisstudy, the change in attraction force owing to the heat generation of the coil was evaluated usingelectromagnetic and heat transfer analysis for a direct-acting solenoid valve used in the hydrogen fuel cell.
From the electromagnetic analysis considering the high permeability of the core, case, disk, and plunger, anattraction force of 163 N was obtained after 80 ms. During the operation of the solenoid valve, there was acopper loss of approximately 71.4 W in the coil, and the heat transfer analysis provided a saturated coiltemperature of 158 after 3,600 s. As the coil temperature increased, the resistance increased, causing a ℃decrease in the attraction force. At a saturation temperature of 158 , the attraction force of the solenoid ℃valve decreased to 115.4 N.

영어초록

Solenoid valves convert electrical signals into electromagnetic energy and output it as mechanical kineticenergy to control the flow rate of a working fluid by opening and closing a valve. They provide fastdynamic response characteristics, making them applicable in automotive and aerospace fields that utilizehydrogen fuel cells. To ensure a stable supply of gaseous hydrogen to the fuel cell stack, solenoid valvesrequire a sufficient attraction force to open the valve in high-differential pressure environments. This attractionforce is generated by electromagnetic force in the coil bobbin, but the heat generated by the coil owing toapplied currents can lead to a decrease in the attraction force. This may hinder the opening of the valve.
Hence, it is important to estimate the attraction force associated with the temperature rise of the coil. In thisstudy, the change in attraction force owing to the heat generation of the coil was evaluated usingelectromagnetic and heat transfer analysis for a direct-acting solenoid valve used in the hydrogen fuel cell.
From the electromagnetic analysis considering the high permeability of the core, case, disk, and plunger, anattraction force of 163 N was obtained after 80 ms. During the operation of the solenoid valve, there was acopper loss of approximately 71.4 W in the coil, and the heat transfer analysis provided a saturated coiltemperature of 158 after 3,600 s. As the coil temperature increased, the resistance increased, causing a ℃decrease in the attraction force. At a saturation temperature of 158 , the attraction force of the solenoid ℃valve decreased to 115.4 N.

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