| 摘要 |
<p>Methods for loading a compressed fluid, such as natural gas, into and dis charging the compressed fluid out of containment are provided. The compresse d fluid is injected into a bottom portion of a container system for storage and/or transport until a target pressure is reached after which gas is withd rawn from an upper portion of the container system at a rate to maintain the target pressure while the compressed fluid is injected in the bottom portio n. The compressed fluid is cooled through an expansion valve and by refriger ated chillers or by injecting a cold liquid of the same chemical composition as the compressed fluid, such as liquid natural gas, into the compressed fl uid prior to injection into the container system. Withdrawal or discharge fr om the container system to a receiving facility begins with blow down from t he bottom portion of the container system without a displacement fluid and c ontinues until pressure falls below an acceptable differential pressure. The discharge stream is passed through a separator and a light gas from the sep arator is pressurized and injected into an upper portion of the container sy stem to drive the compressed fluid out the bottom. The light gas is pressuri zed using either a compressor or a heated tank system, where two vessels ope rate in parallel, trapping and heating the light gas and then discharging to the container system from one while filling the other and alternating the o peration between the two.</p> |
