Structural Design and Stress Analysis of a Fully-Wrapped Composite CNG Gas Cylinder With Nominal Working Pressure of 30 MPa

Abstract China is the world’s largest user of compressed natural gas vehicles, with a total of nearly 6 million compressed natural gas (CNG) vehicles. The nominal working pressure of the cylinders used in the CNG vehicles in China is 20 MPa, as a result, CNG vehicles have a short range. In order to improve the range of CNG vehicles, the development of CNG vehicles with higher pressure is promoted by the CNG vehicle industry in China nowadays. In this paper, structural design of a fully-wrapped composite CNG gas cylinder with nominal working pressure of 30 MPa are carried out. The steel liner is made of 4130X seamless steel with design wall thickness of 5.9 mm, and the outer surface of steel liner is wrapped with resin based glass fiber composite material. The fully-wrapped composite adopts mixed fiber winding mode: low-angle helical winding, high-angle helical winding and hoop winding. Stress analysis and autofrettage pressure optimization of the designed composite gas cylinder are carried out with finite element method. The results show that the designed composite gas cylinder meets the requirements of ISO 11439-2013, and the best autofrettage pressure of the gas cylinder is 52 MPa after optimizing the autofrettage pressure.

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Methods of calculation and testing of gas equipment. Lecture № 6. Part 5. Test method of gas equipment for CNG operation

AutoGas Filling Complex + Alternative fuel ◽

10.36652/2073-8323-2020-19-9-397-417 ◽

2020 ◽

Keyword(s):

Natural Gas ◽

Technological Process ◽

Test Methods ◽

Test Method ◽

Schematic Diagram ◽

Compressed Natural Gas ◽

Certification Tests ◽

Gas Cylinder ◽

And Control ◽

Gas Supply

The method of testing the gas supply systems of HBA for tightness and strength of connections is described. A schematic diagram of CNG accumulation is presented. Diagrams of test stands for compressed natural gas equipment are presented. A schematic diagram of checking the tightness of a singlefuel compressed natural gas supply system is presented. The technological process of checking the tightness of gas cylinder equipment in production conditions is presented. The technological process of inspection of a highpressure cylinder is given. The scheme of certification tests of a cylindrical CNG gas cylinder is shown. The scheme of certification and control of production of CNG cylinders is given. The diagram for testing and tightness of a twostage compressed natural gas reducer is given. Keywords rules and test methods; leakproofness; certification; singlefuel and dualfuel system; compressed natural gas; test modes; certification tests of the cylinder and gas equipment components; destruction of the cylinder

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Vibration based damage assessment of type 1 compressed natural gas cylinder

10.32657/10356/62231 ◽

2015 ◽

Author(s):

Yao Zhang

Keyword(s):

Natural Gas ◽

Damage Assessment ◽

Compressed Natural Gas ◽

Gas Cylinder

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Means of filling gas-cylinder cars with compressed natural gas. Lecture № 8. Design features of stationary automobile gas filling compressor stations (CNG Stations)

AutoGas Filling Complex + Alternative fuel ◽

10.36652/2073-8323-2021-20-6-246-262 ◽

2021 ◽

pp. 246-262

Author(s):

V.I. Erokhov

Keyword(s):

Natural Gas ◽

Block Diagram ◽

Automated System ◽

General View ◽

Schematic Diagram ◽

Compressed Natural Gas ◽

Filling Station ◽

Gas Cylinder ◽

Multi Stage ◽

Functional Components

The classification and standard8size range of modern automobile gas-filling compressor stations (CNG stations) are given. A fragment of the CNG filling station master plan is presented. A schematic diagram of the architectural and planning solutions of a stationary CNG station has been developed. The features of compressed natural gas (CNG) production are summarized. A block diagram of a typical automated system of technological processes of CNG filling stations is presented. The basic, functional and technological scheme of the CNG filling station is given. The design scheme and drive of the multi-stage compressor are developed. The general view and schematic diagram of the gas filling column and its functional components are presented. Keywords compressed natural gas, architectural and planning solutions, classification and characteristics of CNG filling stations, multi-stage compressor, electric drive of the compressor, technological and functional equipment, gas filling column

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Analysis of Fiber Glass/Vinyl Ester Composite Subjected to Internal Pressure Loading for Compressed Natural Gas (CNG) Tube Type IV Application

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.493.645 ◽

2014 ◽

Vol 493 ◽

pp. 645-650

Author(s):

Hosta Ardhyananta ◽

Risa Nurin Baiti ◽

Martha Adi Afrianto ◽

Denni Kurniawan

Keyword(s):

Natural Gas ◽

Internal Pressure ◽

Glass Fiber ◽

Vinyl Ester ◽

Fiber Composite ◽

Failure Criteria ◽

Fiber Direction ◽

Pressure Loading ◽

Compressed Natural Gas ◽

Safe Condition

Natural gas in the form of compressed natural gas (CNG) has a pressure of 20 MPa. Glass fiber/vinyl ester composite has potential to be formed into a CNG tube. This study uses a numerical analysis method and tubular approching to assess composite ability to accept internal pressure loading, refered to failure criteria Tsai-Hill. The number of layers and fiber direction are chosen as independent variable. Configuration angle (+70, +25) provided a more optimal result than using a single angle. Composites are in a safe condition on 180th layer. Thus, the glass fiber composite material / vinyl ester is not recommended to apply in the CNG tube manufacture.

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