{
  "$type": "site.standard.document",
  "description": "Methods (200, 555), devices (160, 400) and systems (100) capable of performing a hot restart of a compressor (120) driven by a turbine (110) are provided. The turbine (110) has a high speed shaft (130) and a low speed shaft (140) connected to the compressor (120). A base slow roll speed at which a…",
  "path": "/patents/1005652",
  "publishedAt": "2012-02-01T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01D19/00",
    "NUOVO PIGNONE SPA [IT]"
  ],
  "textContent": "Methods (200, 555), devices (160, 400) and systems (100) capable of performing a hot restart of a compressor (120) driven by a turbine (110) are provided. The turbine (110) has a high speed shaft (130) and a low speed shaft (140) connected to the compressor (120). A base slow roll speed at which a speed of the low speed shaft is in a slow roll range is maintained (S610) at the high speed shaft for a predetermined time. Then, when a vibration amplitude of the compressor (120) is larger than a vibration limit (S620), the maintaining is repeated. Otherwise, a set speed of the high speed shaft (140) is increased (S630), until a current speed of the low speed shaft (130) reaches a minimum operating speed (S650). If, while increasing the set speed, the vibration amplitude becomes larger than the vibration limit, the maintaining is repeated.",
  "title": "Method and device for controlling a hot restart of a centrifugal compressor"
}