FIELD: compressor station departments for natural gas transfer through gas main.
SUBSTANCE: regenerators of gas-transfer units are heated or cooled down when starting or shutting down these units, respectively, by feeding part of gas flow from operating gas-transfer units. This process is conducted until temperature in inlet gas line of regenerators is brought to cycle air temperature in inlet air line of regenerator under steady state conditions. Process rate (deg./min) is specified from condition Tex.gtr ≤ (Tex.gin - Taout) μ·ηin, where Tex.gtr is temperature of exit gases transferred in transients through inlet gas line of regenerators; Tex.gin is exit gas temperature in inlet gas line of regenerators; Taout is cycle air temperature in outlet line of regenerators under steady state conditions; μ is regeneration ratio; ηin is inherent efficiency of regenerative gas-turbine unit.
EFFECT: reduced risk of regenerator seal failure, enhanced effectiveness and reliability of compressor department in transients.
2 cl, 1 dwg
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