Turbine expanders from Energy Company (Krivoy Rog) will be installed at the plant’s gas pressure reducing station and will substitute for throttling devices. The DGA-5000 turbine expander is designed for the gas main pipeline pressure of 1.2-0.6 MPa. As еhe gas passes through the turbine, its excess pressure is reduced to 0.12–0.07 MPa and it becomes cooler, requiring a gas heater to be installed at the outlet. The gas flow will be 579,000 nm3/hour.

Both units use Privod T-6-2ZU3.1 turbine generators rated at 5 MW. The generators were manufactured on very short leadtime and delivered to the heat and power plant (the contract was signed in June, 2006). A reduction gear with transmission ratio of 3.2 is installed to reduce the rotational speed to the 3000 rpm input of the turbine generator.

The first unit was installed, and construction of the second unit completed, in 2006.
The turbine expander installation is an energy-saving technology with significant potential. Its introduction in the capital’s power plants is part of the Moscow Power Grid development and re-equipment programme, developed by experts, Moscow government, Mosenergo and the Russian Academy of Sciences. About 100 similar power generating units are planned to be supplied for Mosenergo needs in 2007-2012. Other RAO UES subsidiary companies are also interested in application of DGA-6000 turbine expander units. Wholesale Generation Company OGK-4 placed an order for delivery of 6 turbine expanders for Surgutskaya GRES-2 state district power plant in 2007.