Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Study on Cooling of Hydrogen Gas for the Pre-Cooler in the Hydrogen Refueling Station

수소충전소용 프리쿨러를 위한 수소가스 냉각에 관한 연구

  • LEE, KYUNG-HAN (Department of Green Energy Engineering, Graduate School, Hoseo University) ;
  • KOO, KYUNG-MO (Department of Green Energy Engineering, Graduate School, Hoseo University) ;
  • RYU, CHEOL-HWI (Department of Green Energy Engineering, Graduate School, Hoseo University) ;
  • HWANG, GAB-JIN (Department of Green Energy Engineering, Graduate School, Hoseo University)
  • 이경한 (호서대학교 일반대학원 그린에너지공학과) ;
  • 구경모 (호서대학교 일반대학원 그린에너지공학과) ;
  • 유철휘 (호서대학교 일반대학원 그린에너지공학과) ;
  • 황갑진 (호서대학교 일반대학원 그린에너지공학과)
  • Received : 2019.05.29
  • Accepted : 2019.06.30
  • Published : 2019.06.30
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Abstract

In the hydrogen refueling station (HRS), it is need the pre-cooling system (PCS) to limit the inside temperature ($85^{\circ}C$) of the onboard thank (700 bar) and to charge the hydrogen at short time (within 3 minutes) to fuel cell electric vehicle (FCEV). From those safety reasons, the temperature of hydrogen gas must be controled $-33^{\circ}C$ to $-40^{\circ}C$ in PCS. The cooling test of the gaseous ($N_2$, He, $H_2$) was carried out using heat exchanger (pre-cooler) by indirect cooling and direct cooling method. It was confirmed that the temperature of hydrogen gas had below $-40^{\circ}C$ at below $-75^{\circ}C$ of chiller temperature in direct cooling.

Keywords

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Fig. 1. Concept of the pre-cooling system in HRS

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Fig. 2. Size of the heat exchanger

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Fig. 3. Experimental apparatus for indirect cooling of the gases

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Fig. 4. Experimental apparatus for direct cooling of the gases

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Fig. 5. Relationship between the temperature of chiller and the cooling temperature of H2 gas obtained by direct cooling

Table 1. Construction plan of hydrogen refueling station in South Korea

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Table 2. Relationship between the flow rate of heat medium oil and the cooling temperature of N2 and He gas obtained by indirect cooling

SSONB2_2019_v30n3_237_t0002.png 이미지

Table 3. Relationship between the temperature of chiller and the cooling temperature of N2 and He gas obtained by direct cooling

SSONB2_2019_v30n3_237_t0003.png 이미지

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