In an announcement made on October 17, 2014, Toshiba Corporation said that it will supply a first-of-a-kind supercritical CO2 turbine to a demonstration plant being built in Texas.
Toshiba will start delivering the turbine, an essential part of the power cycle system that will be demonstrated, in August 2016. The plant is expected to enter the commissioning stage later in 2016. The unique supercritical CO2 power cycle was developed by 8 Rivers Capital.
The plant will be developed by NET Power, a U.S. venture, along with CB&I, the most complete energy infrastructure focused company in the world, Exelon Corporation, one of the leading competitive energy providers in the U.S., and 8 Rivers Capital.
The new supercritical CO2 power cycle system utilizes high temperature and high pressure gas at the turbine inlet. In order to cope with these conditions, Toshiba has utilized material specifically developed for use in high temperature steam turbines together with technology derived from its combustion and cooling technology used in gas turbines. Toshiba has designed the combustor to cope with a gas pressure of 300 bars, which is more than 10 times the gas pressure utilized in conventional gas turbines.
Using supercritical CO2 as a working fluid, the system produces low-cost electricity and eliminates emissions of NOx, CO2, and other pollutants. CO2 is collected at high-pressure without the use of additional carbon-capture equipment or processes, enabling full carbon-capture without increasing the cost of electricity, reports Toshiba.
Toshiba has been developing the new turbine and combustor for the system along with NET Power, CB&I, Exelon Corporation, and 8 Rivers Capital, since 2012. The five companies have now completed major agreements to build a 25MW gross electric (50MWt) demonstration plant in Texas. Once the operating tests are successfully completed, the demonstration plant is intended to provide the basis for the construction of the first 295MWe full-scale commercial plant.
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