District Energy, Equipment & Technology, Europe

Siemens steam turbine for cogen/DH scheme in Latvia

18 June 2010 – Siemens Energy has received an order for a condensing steam turbine generator to supply the Latvian capital Riga with district heat and electrical energy in the Riga TPP-2 Combined Cycle Co-Generating Facility.
 
The new cogeneration district heating plant will have an overall electrical capacity of approximately 420 MW and a thermal capacity of 270 MW.
 
The turbine generator will feature three industrial steam turbines, two SST-800 machines and one SST-500 steam turbine, which will be produced at Siemens’ manufacturing plant in Görlitz, Germany.
 
The order also includes a generator, a condensing plant, and three district heat exchangers.
 
In summer, the turbine generator unit will provide an electrical output of 145 MW and in winter a thermal output of 249 MW, combined with an electrical output of 125 MW.
 
The steam turbine generator is unique in terms of its complexity and flexibility, says the company.
 
The turbine configuration and the use of three district heaters allow a precise adjustment of the turbine generator performance to the actual heating demand. During the summer months or during periods with low heating demand the third SST-500 steam turbine in the train can be shut down.
 
The turnkey EPC contract has been awarded to the Turkish company Gama Power Systems, which will design, supply, erect, and commission the cogeneration district heating plant in Riga for the Latvian utility Latvenergo.