[논문]수소충전소용 유압식 압축기 안전성 시험에 관한 연구

성혜진; 황봄찬; 최성준; 김영규; 조성민

doi:10.14775/ksmpe.2020.19.11.008

수소충전소용 유압식 압축기 안전성 시험에 관한 연구
Hydraulic Compressor Safety Test for Hydrogen Stations 원문보기

한국기계가공학회지 = Journal of the Korean Society of Manufacturing Process Engineers, v.19 no.11, 2020년, pp.8 - 15

성혜진 (한국가스안전공사 가스안전연구원) , 황봄찬 (한국가스안전공사 가스안전연구원) , 최성준 (한국가스안전공사 가스안전연구원) , 김영규 (한국가스안전공사 가스안전연구원) , 조성민 (한국가스안전공사 가스안전연구원)

Abstract ▼ AI-Helper

The government has announced its Hydrogen Economy Roadmap to strengthen global competitiveness on the hydrogen economy by focusing on hydrogen fuel cell electric vehicles and fuel cells. In this regard, the interest on the economics and safety of the infrastructure of hydrogen stations has also increased. In this study, a test bed similar to an actual hydrogen charging facility was built, and a prototype of a piston-type compressor was modeled. In this model, the piston was hydraulically compressed to progressively test leakage, leakage rate, and durability and to check for any malfunction. Moreover, the leakage rate, cylinder leak performance, and compressor operation durability were evaluated for safety; it was confirmed that there were no abnormalities. Nevertheless, an investigation of the long-term use and operating pressure of the compressor is necessary to verify the safety of developing a100-MPa domestic compressor in the future.

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가설 설정

1) Check whether hydrogen is supplied from the tube trailer to the front end of the compressor at 10 MPa.
2) Check that the discharge pressure is 82 MPa in the discharge piping gauge after operating the compressor.
2. The results of the cylinder leak test indicate that there were no soap bubbles at the initial pressure of 83.4 MPa. After one hour, there was a small pressure drop of 0.

제안 방법

In this chapter, three tests are performed for the developed piston compressor prototype by applying the test method previously defined. The obtained results are presented in the following sections.
In this study, a testbed similar to an actual hydrogen charging facility is constructed and a piston compressor prototype is modeled in which the piston is compressed by hydraulically operating the piston without lubrication to check for operational abnormalities by conducting stepwise tests to determine leakage rates, leaks, and durability ^{[1, 5}]. This study further intends to present a safety verification method for the long-term operation of hydrogen compressors that are currently used in charging facilities and do not possess any safety verifications due to the lack of an appropriate test method.
In this study, a testbed was constructed to investigate a safety test method for domestic compressor products. The study further conducted tests on the compressor to determine leakage rate, leak, and durability in a high-temperature and high-pressure environment.
products. The study further conducted tests on the compressor to determine leakage rate, leak, and durability in a high-temperature and high-pressure environment. The following conclusions were obtained:
This study examines the safety of a hydrogen compressor, as shown in Fig. 1, through three test items that include a leakage rate test to identify the leakage rate of the piston seal, an leak test of the cylinder, and an overall operation durability test of the compressor.
The internal piston seal is responsible for the internal leakage between the cylinders, and this leakage in the cylinders is crucial because high-pressure hydrogen is temporarily stored inside the piston [3]. Thus, this study investigates the internal seal, leak, as well as the operational performance of the compressor. Table 1 shows the specifications of the tested piston compressor prototype.

성능/효과

1. The results of the leakage rate test on the inner seal of the piston indicate that leakage occurred at 10 MPa in the primary test and a leakage rate of 6% occurred at 50 MPa in the secondary test. There was a difference in the leak rates of the seal according to the primary and secondary pressures.
3. The results of the durability test indicate that for continuous the operation of the compressor in the testbed, no abnormalities were found during the five tests. This durability test confirmed that there were no abnormalities in the operation of the compressor in an environment equivalent to that of an actual hydrogen station by repeating the charging and compression cycles.
The results of the durability test indicate that for continuous the operation of the compressor in the testbed, no abnormalities were found during the five tests. This durability test confirmed that there were no abnormalities in the operation of the compressor in an environment equivalent to that of an actual hydrogen station by repeating the charging and compression cycles.

후속연구

Continuous research is necessary for the appropriate use of pressure and time because this experiment was performed in the developmental stage of the compressor based on the conditions of the established testbed. However, this study will be used as a pilot test for the development of a 100MPa-class domestic compressor as well as for safety evaluation research.
. This study further intends to present a safety verification method for the long-term operation of hydrogen compressors that are currently used in charging facilities and do not possess any safety verifications due to the lack of an appropriate test method.

참고문헌 (8)

Cho, S. M., Roh, G. G., Lee, S. K., Lyu, S. K., "Development of Hydraulic Compressor for Hydrogen Station," Journal of the Korean Society of Manufacturing Process Engineers, Vol. 17 No. 6, pp.158-163, 2018.

원문보기 상세보기
Kim, M. W., Hur, K. D., Ye, S. D., "Finite Element Analysis for the Piston Pump Tube Design", Journal of the Korean Society of Manufacturing Process Engineers, pp. 108-109, 2015.
Kim, Y. H., "An Experimental Study on Oil Pressure Distribution in the Piston-Cylinder Mechanism," Journal of the Korean Society of Manufacturing Process Engineers, Vol. 10, No. 6, pp.77-82, 2011.
Kim, S. K., Kim, M. K., "Development of Aluminium Alloy for Piston of Air Compresso,r" Journal of the Korean Society of Manufacturing Process Engineers, Vol. 7, No. 1, pp.9-16, 2008.
Kim, S. H., "A Study on the Development of Internal Components of Hydraulic Cylinder Applied to Hydrogen Compressor," A Thesis for a Master degree, Changwon National University, Republic of Korea, 2019.
Lee, T. H., Kim, M. J., "Experimental and numerical Study on the Hydrogen Refueling Process", Korean Hydrogen and New Energy society, Vol. 18, No.3, pp.342-347, 2007.
Shin, H. J., "CFD Analysis of an AirCompressor for a Hydrogen Electric Car," Transactions of the Korean Society of Mechanical Engineers-B, Vol. 42, No. 12, pp.853-859, 2018

상세보기
Baek, S. W., "Propagation and Technologies on Hydrogen Fueling Station," Journal of the Korean Society of Automotive Engineers, Vol. 41, No. 2, pp. 28-32, 2019.

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수소충전소용 유압식 압축기 안전성 시험에 관한 연구
Hydraulic Compressor Safety Test for Hydrogen Stations 원문보기

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수소충전소용 유압식 압축기 안전성 시험에 관한 연구 Hydraulic Compressor Safety Test for Hydrogen Stations 원문보기

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가설 설정

제안 방법

성능/효과

후속연구

참고문헌 (8)

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수소충전소용 유압식 압축기 안전성 시험에 관한 연구
Hydraulic Compressor Safety Test for Hydrogen Stations 원문보기

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