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Dutch Experience With Hot Windbox Repowering
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The combination of a topping Brayton (gas turbine) cycle with an existing Rankine (boiler-steam turbine) cycle for improved overall cycle heat rate has been very successful in the Netherlands.
In the years 1985–1989 10 gas-fired power plants with a capacity of nearly 4000 MW were substantially modernized by adding a gas turbine topping cycle.
In all these cases the Hot Wind box repowering or Windbox repowering with a supplementary boiler option was chosen.
Besides the improvement of the heat rate it was remarkable that a NOx-emission reduction was achieved between 50 and 85%.
So far more than 500,000 hours experience with hot windbox is available.
If NOx-reduction becomes very important windbox repowering is the best option to modernize power plants.
American Society of Mechanical Engineers
Title: Dutch Experience With Hot Windbox Repowering
Description:
The combination of a topping Brayton (gas turbine) cycle with an existing Rankine (boiler-steam turbine) cycle for improved overall cycle heat rate has been very successful in the Netherlands.
In the years 1985–1989 10 gas-fired power plants with a capacity of nearly 4000 MW were substantially modernized by adding a gas turbine topping cycle.
In all these cases the Hot Wind box repowering or Windbox repowering with a supplementary boiler option was chosen.
Besides the improvement of the heat rate it was remarkable that a NOx-emission reduction was achieved between 50 and 85%.
So far more than 500,000 hours experience with hot windbox is available.
If NOx-reduction becomes very important windbox repowering is the best option to modernize power plants.
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