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Netherlands Plants Inaugurated

Operation flexibility supports integration with renewables; combined-cycle plants to contribute to district heating

Posted on June 20, 2013

Siemens Energy has completed the Hemweg 9 and Diemen 34 combined-cycle power plants in the Netherlands. Both plants were constructed as turnkey projects and are each capable of an electrical output of approximately 440 MW with an efficiency of almost 60%, the company said. The customer is the Dutch utility Nuon, part of Vattenfall.

In addition to turnkey construction, Siemens supplied each plant with an SGT5-4000F gas turbine, an SST5-5000 steam turbine, a hydrogen-cooled SGen5-2000H generator, the complete electrical equipment, and an SPPA-T3000 I&C system.

Both power plants are configured as single-shaft units in which the gas and steam turbines are arranged on one shaft and drive the same generator, Siemens said.

The 440 MW Hemweg 9 plant is in the Westport district to the west of Amsterdam’s center and has replaced the Hemweg 7 power plant that was shut down at the end of 2012. Hemweg 9 was designed to permit retrofitting with district heating at a later date.

Diemen 34, located to the east of Amsterdam – about 15 km from Hemweg – has an electrical capacity of 435 MW and also produces 260 MW of thermal capacity for Amsterdam’s district heat. Siemens said this increases the plant’s maximum efficiency to 85%.