Two integrated power islands fitted with Siemens H-class gas turbines are to be supplied to the Patriot combined cycle power plant in Pennsylvania, providing a total generating capacity of 829 MW. Siemens has also reported recent successes for its advanced gas turbine, the H, in the USA, with total order numbers worldwide very similar to the J. GRDA, established in 1935, operates seven power stations, with a total installed capacity of 1730 MW.
Currently nine J-Series gas turbines are in operation, with more than 28000 hours of operation. With the GRDA project, the total number of J-Series gas turbine orders reached 28 units. The gas turbine will be manufactured at Savannah Machinery Works in Savannah, Georgia, USA, while the generator will be supplied by Mitsubishi Electric Corporation. Estimates show that the combined cycle plant minimises capital costs while life cycle costs are "no lower than the alternatives" and it is expected to become GRDA's primary generation unit.
To provide the natural gas fuel, which will be sourced within Oklahoma, GRDA is placing a contract with pipeline company Enable Oklahoma. GRDA says it arrived at the decision to build a combined cycle plant, and this number, after "much research and evaluation", as well as assistance from Black & Veatch. Total costs for the new combined cycle plant are estimated to be $372 million, according to GRDA. GRDA says it is moving forward with plans to retrofit emissions controls on the GREC unit 2 coal fired unit while a final decision on what do with the GREC unit 1 coal plant, possibly decommissioning or conversion to gas, is still pending.Īs well as the M501J gas turbine, the scope of supply for Grand River Energy Center also includes an SRT-50 steam turbine and a generator, as well as a separate long-term service agreement (LTSA), which covers maintenance of the plant, replacement parts supply and remote monitoring of the plant once it is in operation. The new combined cycle plant at the site, which is about 56 km east of Tulsa, the second largest city in Oklahoma, will help GRDA (established in 1935, with a current installed capacity of 1730 MW in seven power stations (hydro, wind, gas, as well as the coal units at GREC)) to meet new emissions regulations by reducing its dependence on coal-fired power generation. The new combined cycle plant will be supplied through Mitsubishi Hitachi Power Systems Americas, Inc (the new name for Mitsubishi Power Systems Americas, Inc, following completion of the merger of the fossil power generation businesses of Hitachi and Mitsubishi). The name change was announced in February 2014. The power plant was formerly known as GRDA Coal Fired Complex (Chouteau) and has been GRDA's main source of electricity production since the coal units began commercial operations in the early 1980s. The new natural gas fuelled combined cycle unit will be built alongside two existing coal fired units at the site, which totals 1245 acres and is located on the southern edge of the MidAmerica Industrial Park. An M501J has been chosen by Grand River Dam Authority (GRDA), Oklahoma's state-owned electric utility, for its 495 MW Grand River Energy Center (GREC) 3 combined cycle power station, scheduled to enter operation in March 2017. Mitsubishi has secured the first US order for its J-Series gas turbine. Mitsubishi has secured the first US order for its J-Series gas turbine in Oklahoma, while Siemens will supply a H-class turbine for a project in Pennsylvania.