Abstract: In underground crude oil storage facilities, concrete plugs are mainly required to contain crude oil inside caverns and are designed as gas-tight to prevent movement of any oil or...

May 15, 2015 · In underground crude oil storage facilities, concrete plugs are mainly required to contain crude oil inside caverns and are designed as gas-tight to prevent movement of any oil or vapor across the tunnel, either in a horizontal or vertical direction.

Jun 1, 2016 · The design of the concrete plug that seals the compressed air stored in the container is another demanding task. Numerical analyses indicate that in most cases, the stability of the rock mass under the plug loading is not a decisive factor for plug design.

Mar 1, 2023 · One of the effective ways to reduce air pressure loss is to regulate the air temperature during the charging and discharging process, like the temperature regulation system designed in this paper, so that the air pressure in the storage stage can be reduced.

May 15, 2015 · In underground crude oil storage facilities, concrete plugs are mainly required to contain crude oil inside caverns and are designed as gas-tight to prevent movement of any oil or vapor...

Oct 16, 2011 · In underground CAES cavern in lined rock, installation of a concrete plug is essential to seal the compressed air stored in the container; therefore, the selection of the shape and dimension of the concrete plug could be a critical design factor.

In the present study, the stability of a compressed air energy storage cavern was numerically assessed by concrete plug shapes in order to investigate the optimal shape of concrete plug. The concrete plugs were cylindrical, embedded cylindrical, tapered, and wedged in shape.

Concrete plug stability has been investigated mostly in the context of PHS systems. Auld (1983) and Ilyushin (1988) described different types of underground plugs, analysed the factors to be considered in design, and suggested a simple design formula addressing the possible failure modes in the plug, in the rock mass

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In the present study, the stability of a compressed air energy storage cavern was numerically assessed by concrete plug shapes in order to investigate the optimal shape of concrete plug. The concrete plugs were cylindrical, embedded cylindrical, tapered, and wedged in shape.