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by formerly_proven
625 days ago
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Most of the energy in pipelines is lost through friction inside the medium and friction between the medium and the inner wall. These are very much not reversible processes. Also the pressure differential is much bigger than you suggest. E.g. the pressure differential across NS1 was nominally around 110 bar (1600 psi) with an inlet pressure of 220 bar (3200 psi) and an outlet pressure of half that. > You don't repeatedly recompress along the pipeline length - you compress once at the start, and decompress once at the end. There are often recompression stations in pipelines precisely because pressure drops across the length, and on land it's cheaper to have those along the length of the pipeline than one really big one like NS1 had. |
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