| District heating


Mitsubishi Power to supply two H-25 gas turbines for Tashkent cogeneration plant


Mitsubishi Power H-25 gas turbine


Mitsubishi Power reports that it has received an order for two H-25 gas turbines with capacity of 32 MW per unit for a natural gas fuelled cogeneration plant being built in Tashkent, capital of Uzbekistan. The facility will be run by JSC Tashkent HPP, cogeneration business operator in the city. Turkish firm Calik Enerji has been appointed the project contractor for engineering, procurement, and construction (EPC), with the gas turbine (equipment) supplied through that company.


The gas turbines are scheduled to enter operation in 2024.


An H-25 gas turbine with heat recovery steam generator is already in operation at the cogeneration plant site. This unit, No. 1, has been in operation since 2013. Equipment for unit 1 was supplied through Tohoku Electric


Power Co. as part of an energy efficiency model project implemented by Japan’s New Energy and Industrial Technology Development Organization (NEDO) and the government of Uzbekistan. The new project is supported by JICA (Japan International Cooperation Agency), which provided a yen power sector loan. The new H-25 gas turbines will be manufactured at MHI’s Hitachi Works in Ibaraki Prefecture, Japan.


Mitsubishi Power describes the H-25 gas turbine as a heavy duty machine with an outstanding reliability record established over many operating hours.


Since the initial H-25 gas turbine order for Tashkent cogeneration in 1987, Mitsubishi Power says it has established “a solid track record of operating performance”, selling 30 units in Japan


and 160 overseas, including this latest order. The high temperature of the exhaust gas makes it particularly suitable for cogeneration, says Mitsubishi Power.


Since independence, the Republic of Uzbekistan has maintained steady economic growth supported by its abundant natural gas and other energy resources.


Mitsubishi Power has supplied gas turbine combined cycle equipment used in a number of power plants throughout the country, including Navoi 1 & 2, Talimarjan, Turakurgan and Sirdarya. Going forward, Mitsubishi Power says it will “maintain and further develop a positive working relationship with Uzbekistan’s state-run power company and support the widespread adoption of environmentally friendly cogeneration employing combined cycle technology.”


Fortum and Microsoft collaborate on using data-centre waste heat in Helsinki megaproject


Fortum and Microsoft are collaborating on a project in which Fortum will capture the excess heat generated by a new data centre region to be built by Microsoft in the Helsinki metropolitan area in Finland. The data centres will use 100% emission-free electricity, and Fortum will transfer the clean heat from the server cooling process to homes, services and business premises connected to its district heating system. The waste heat recycling concept from the data centre region will be the largest of its kind in the world. The concept is unique in that the location for


the data centre region was chosen specifically with waste heat recycling in mind. It makes use of Fortum’s existing district heating infrastructure, the second largest in Finland, for heat capture and distribution. The infrastructure includes about 900 km of underground pipes that transfer heat to about 250 000 users in the cities of Espoo and Kauniainen and the municipality of Kirkkonummi. Fortum says it has worked with the local cities and municipalities for several years in order to pave the way for these investments. “Sometimes the most sustainable solutions are


simple ones”, said Markus Rauramo, president and CEO of Fortum.


Once the new data centre region’s waste heat capture is in operation, a total of about 60% of the area’s heating will be provided by climate- friendly waste heat. Of this, 40% will result from the data centre region and the rest from other waste heat sources such as waste water treatment.


The joint project takes place at the “intersection of two megatrends”, says Fortum: digitalisation and the energy transition.


www.modernpowersystems.com | May 2022 | 37


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