25 Location: Ulaanbaatar, Mongolia Plant type: Capacity: Coal-fired power 8 x 420 t/h, 3 x 123 MW / 1 x 120 MW / 1 x 100 MW / 1 x 80 MW Completion: 2001 (Phase 1), 2007 (Phase 2), TPP4 was built many years ago and has been severely affected by the scarcity of spare parts for its legacy systems. Plant shutdowns were a frequent occurrence due to equipment malfunctions and accidents, disrupting the supply of heat and power. In addition, the plant caused severe air pollution due to inefficient control of coal combustion. Efforts to correct these problems were also hampered by the loss of many of the plant's original blueprints and other design related documents.To solve these problems, the Mongolian government decided to execute a plant revamping project in two phases using an official development assistance (ODA) loan. Phase one for boilers one to four started in 1998 and was completed in 2001. Phase two for boilers five to eight started in 2001 and was completed in 2007. For this project, Yokogawa delivered control systems and field instrumentation for all eight boilers.2019 (Phase 3)Plant InformationTPP4 in winterTPP4, a lifeline for MongoliaPhase 1-2 Boiler Control ModernizationExecutive SummaryIn Mongolia, temperatures fall as low as -40°C in mid-winter. The heat and electricity generated by Thermal Power Plant No.4 (TPP4) in the capital city of Ulaanbaatar is an important lifeline for the people living there. This is the largest coal fired power plant in Mongolia and it generates 70% of the electricity for Mongolia's central energy system and 65% of the heat energy used by Ulaanbaatar district heating system.Ulaanbaatar TPP4Modernization of Large Thermal Power Plant Maintains a Key Lifeline for the People of Mongolia
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