Global Patent Index - EP 0004415 B1

EP 0004415 B1 19820505 - SYSTEM FOR MINIMIZING VALVE THROTTLING LOSSES IN A STEAM TURBINE POWER PLANT

Title (en)

SYSTEM FOR MINIMIZING VALVE THROTTLING LOSSES IN A STEAM TURBINE POWER PLANT

Publication

EP 0004415 B1 19820505 (EN)

Application

EP 79300255 A 19790220

Priority

  • US 88976478 A 19780324
  • US 88977078 A 19780324

Abstract (en)

[origin: EP0004415A1] This invention relates to a system for reducing steam throttling losses which occur across turbine governor valves, by adjusting boiler throttle pressure so as to obtain optimum govenor valve setting thereby providing for maximum power production efficiency. In a typical valve grouping sequential positioning pattern, the flow rate is assumed to be F3 where valves 1, 2 and 3 are fully open causing substantially no throttling losses; however, valves 4 and 5 are partially open causing some losses. An optimum valve position program (56) is operative to determine optimum flow demands corresponding to optimum valve positions (72 and 71) which are greater and less than the present flow demand. Then, the closest optimum flow demand, e.g. (72) is selected. Based on this optimum flow demand, a throttle pressure control program (34) adjusts throttle pressure setpoint so that the governor valve (4, 5) positions change to (72). A major advantage of this invention is fuel savings due to maximum time spent in the optimum valve position conditions.

IPC 1-7

F01D 17/20; F01K 13/02; F22B 35/10

IPC 8 full level

F01D 17/18 (2006.01); F01K 13/02 (2006.01); F22B 35/06 (2006.01)

CPC (source: EP)

F01D 17/18 (2013.01); F01K 13/02 (2013.01); F22B 35/06 (2013.01); F05D 2220/50 (2013.01)

Designated contracting state (EPC)

BE CH DE FR GB IT SE

DOCDB simple family (publication)

EP 0004415 A1 19791003; EP 0004415 B1 19820505; AU 4505279 A 19790927; AU 524994 B2 19821014; BR 7901734 A 19791127; DE 2962665 D1 19820624; ES 478921 A1 19791116; JP S54133244 A 19791016; JP S627363 B2 19870217; MX 145586 A 19820308

DOCDB simple family (application)

EP 79300255 A 19790220; AU 4505279 A 19790313; BR 7901734 A 19790321; DE 2962665 T 19790220; ES 478921 A 19790323; JP 3499979 A 19790324; MX 17663479 A 19790216