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The Study of Comparison of Cooling System for H2 Discharge Station

수소충전용 직접 및 간접 냉각시스템 비교 평가 연구

  • Received : 2019.03.08
  • Accepted : 2019.04.30
  • Published : 2019.04.30

Abstract

This study is a research to compare efficiency of new cooling system (chiller, pre-cooler) to that of the conventional system at the hydrogen refueling station (HRS). This study includes contents for thermodynamic comparison of cooling system for HRS and comparison of pros and cons of its components. So It is to establish design concept of cooling system of HRS supplying with fuel cell electric vehicle (FCEV). HRS is charging high pressure H2 (700 bar) to FCEV. However cooling system is need to prevent temperature rise in tank. This cooling system consists of pre-cooler and chiller system.

Keywords

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Fig. 1. Chiller system

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Fig. 3. Manufacturing process of printed circuit heat exchanger

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Fig. 4. Surface after diffusion bonding and PCHE

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Fig. 6. Indirect chiller system: 10 FCEV charging/1 hour

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Fig. 5. Indirect chiller system: Aspen Hysys modeling

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Fig. 7. Indirect chiller system: 2 FCEV charging/1 hour

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Fig. 8. Direct chiller system: Aspen Hysys modeling

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Fig. 9. Direct chiller system: 10 FCEV charging/1 hour

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Fig. 10. Direct chiller system: 2 FCEV charging/1 hour

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Fig. 11. Pre-cooler heat transfer coefficient of indirect cooling system

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Fig. 12. Pre-cooler heat transfer coefficient of direct cooling system

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Fig. 2. (a) One-stage compression and on-stage expansion refrigeration cycle, (b) two-stage compression and one-stage expansion refrigeration cycle, (c) two-stage compression and two-stage expansion refrigeration cycle

Table 1. R507 physical properties

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Table 2. Heat exchanger type

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Table 3. Direct cooling and indirect cooling system

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Table 4. Power of direct/indirect cooling system

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Table 5. CAPEX and OPEX of Direct/indirect cooling system

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Table 6. Design process condition

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Table 7. Pre-cooler size of direct/indirect cooling system

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References

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