Russian capital needs a powerful energy generator
By 1971, in Sverdlovsk at the Ural Turbine Motor Plant the world's largest co-generation turbine of capacity 250 MW was assembled. There were no turbines of such capacity all over the world, which could have been capable to produce electrical as well as heat energy for consumers. This turbine was manufactured by Ural engineers especially for Moscow CHPP-22, which generated energy for the industrial areas of the Russian capital: Lyublino, Kuzminki, Vyhino, Lyubertsy.
V.F.Zhigalin, Minister of Heavy, Power and Transport Engineering of the USSR wrote in his message of greeting from January 5, 1971: "Ural turbine motor builders ... truly, are the creators of the largest and most efficient co-generation turbines. For high quality and economic performance ten major products, which is 80% of the total production output in terms of turbines, have been awarded a quality mark. By the significant date — the 50th anniversary of Lenin's GOELRO plan — Ural turbine motor builders have won another brilliant victory — finished the assembly of the new and the world's largest co-generation turbine of capacity 250 thousand KW."
Implementation of the task set for Ural engineers proved to be not so easy: specifically for this turbine a new production building of area 17 000 square meters had to be erected.
In 1972, a prototype model of the turbine Т-250/300-240 was successfully installed at the power unit No.9 of CHPP-22 at Dzerzhinskiy, near Moscow, and began to generate its first heat and electricity.
In 1979, for design engineering, development of production and introduction into the national economy of the turbine T-250/300-240, M.I.Neuymin, Deputy Minister of Transport and Power Engineering (former Director of the Ural Turbine Works), the team of developers from UTW and N.I.Serebryakov, Chief Engineer of Mosenergo and A.V.Zvyagintsev, Director of CHPP-22, were awarded USSR State Prize.
Alexander Osyka, Deputy Director General for Production of Mosenergo OJSC: "In 1973, being a student of the Moscow Energy Institute, I did practical training at CHPP-22 and participated in the installation of the turbine T-250 on the power unit No.10. It was the second turbine of this type, manufactured by Ural Plant for the needs of electric power system of the Russian capital. At that time the first prototype model of the turbine T-250 at the power unit No.9 of CHPP-22 was already in operation. The staff of the power plant and Mosenergo actively participated in its introduction and improvement. In a short time the turbines had been brought to the design parameters, that served as a standard for the growth of co-generation power capacity of other plant of the Russian capital. Turbines T-250 became the main energy sources in the structure of Moscow heat supply system. Total number of turbines manufactured for Mosenergo amounted to 19 units T-250, the last of which was put into operation at CHPP-25 in 1991. Over the past operation period these turbines had proved their efficiency and reliability. Advanced technical solutions for the first time implemented 40 years ago ensured long operational life for this equipment. Due to accumulated experience in operation of turbines T-250, upgraded turbines T-295 will ensure even greater efficiency and reliability."
Forty years later
Generating capacities of the Russian capital starts being upgraded, and with relying upon the capabilities of domestic machine-building complex.
On November 25, 2014 at CHPP-22 of Mosenergo took place a milestone event — during the official ceremony a memorandum of cooperation was signed between Gazprom Energoholding LLC and ROTEC CJSC. A pilot project for reconstruction of the power unit No.9 of CHPP-22 started up, providing for the replacement of the very first Ural turbine — T-250, which became the pioneer for a series of powerful Soviet steam turbines, — with a new turbine model manufactured by Ural Plant. Prototype model of the new turbine marked as T-295/335-23,5 shall have been installed on the power plant by September 2018. This turbine will be more powerful than its predecessors, its capacity can reach 335 MW. For co-generation steam turbines manufactured in Russia it is an absolute record. As to the world experience, an attempt to create more powerful co-generation turbine — of capacity 400 MW— was taken by the USA in the late 80's. However, this unit had never been commercialized.
"In terms of reliability of design solutions and technical parameters turbine type T-250 can be called unique and unparalleled anywhere in the world. Designed and manufactured by Ural Turbine Works about 40 years ago, these turbines are still in operation. Along with that in the coming years some of the turbines T-250 operated at power plants of Mosenergo will reach their ultimate life. In this regard, it was decided to implement a pilot project for replacement of the turbine at the power unit No.9 of CHPP-22. Of course, introduction of new types of equipment is a risk-bearing decision, but I believe that successful implementation of this project will become an important step in the development of the Russian Power Engineering," — said Denis Fedorov, Director General of Gazprom Energoholding LLC.
The new turbine have been developed by design devision of Ural Turbine Works for several years. The project was discussed in the leading power engineering institutes in Russia and at the meetings of Science and Engineering Board of Energoholding. The goal was to preserve the best technical parameters of excellently proved T-250, but take a further step towards the increased capacity to meet modern requirements for energy efficiency and controllability of operating procedures, as well as to increase the service life by many times.
Program for the future
Mikhail Lifshitz, Director General of ROTEC CJSC, Chairman of the Board of Directors of Ural Turbine Works says: "Today, the power plats of Mosenergo operate 49 turbines, manufactured by us, nineteen of which are of model T-250, and another thirty turbines of lower capacity of model T-100 and others. Many of them reach the time for being replaced. The special feature of the project, which was developed by us together with our colleagues from Mosenergo for the power unit No.9 of CHPP-22, is that it allows for the more powerful turbine to be installed exactly into that place and slot, in which the turbine of lower capacity is installed today. We managed to provide the lowest cost for the facility in terms of general construction works and development of infrastructure for the power unit. We are ready to offer similar projects for other turbines."
Modernization of the existing fleet of power turbines is a global task that involves not only the city of Moscow, but also power generating system as a whole. Replacement or technical upgrade of the overaged power units should improve reliability of electricity and heat energy supply to the consumers and ensure trouble-free operation. As consumers, we are not tired to use such blessings of civilization as electricity and centralized heat supply, despite the fact, that their history counts a century. They are still in fashion. And it’s not just for heating and electricity are the necessary conditions of our modern way of life. They are the infrastructure basis for the development of the economy. Power engineers still use large-scale approach to the development of the economy.