Mae Moh Power Plant

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Location Mae Moh District, Lampang Province

Generating Capacity
         Having a production capacity of 2,220 MW, the Mae Moh Power Plant can supply 50% of the electricity to the northern area, 30% to the central area, and 20% to the northeastern area of Thailand. The fuel consumption is approximately 16 million tons yearly.

Unit Capacity (MW) Operation Year
Unit 4-7 Replacement  655 2019
8-13 300 each 1989-1995

Background
         In 1971, in the reign of King Rama VI, it was found that there were lignite sources in the area of Mae Moh District in Lampang Province and Klong Khanan District in Krabi Province. In the reign of King Rama VII, these lignite sources were reserved for official use only.
         In 1954, a royal decree was issued to establish the Lignite Authority to actively operate the Mae Moh Lignite Mine. The Mae Moh Mine had been producing and selling lignite to tobacco factories in the north as well as to railways factory and cement factory. In 1968, the Electricity Generating Authority of Thailand was established by the promulgation of the Electricity Generating Authority of Thailand Act, B.E. 2511 (1968) which merged the assets and operation of Lignite Authority, Yanhee Electricity Authority and the Northeastern Electricity Authority. Since then the Mae Moh Lignite Mine which is the largest mine of Thailand has been operated under the responsibility of EGAT.
         On August 17, 1972, EGAT started the construction of Mae Moh Power Plant Units 1-2 with the installed capacity of 75 MW each and expanded the Mae Moh Mine to increase its production.

Facilities

Accommodation
         The guest houses provide the visitors with natural peacefulness amid the mountains and beauty of various species of trees.

Restaurant
         The club house is where the visitors can enjoy their food and the view of the mine and golf course.

Golf Course
         Mae Moh’s golf course in Mae Moh Mine covers an area of 236 rai with standard 18 holes. Here, the design, maintenance, and landscape were emphasized to comply with international standard.

Mae Moh Mexican Sunflower Field
         The Mexican Sunflower Field covers an area of 500 rai, originated from the soil in the mine pit being piled up to build a hill which is higher than the ground level for 200 meters. During winter, in November and December, the Mexican Sunflower will blossom.

Mae Moh Power Plant Unit 4-7 Replacement Project

         Mae Moh Power Plant Units 4-7 Replacement Project which had been approved by the National Council for Peace and Order on August 19, 2014 to run the 600 MW capacity was approved by the Cabinet on February 26, 2019 to expand its capacity to 655 MW. It utilizes lignite as fuel for power generation with ultra-supercritical (USC) technology, which is presently most modern. With the boiler system producing the stream using higher temperature and pressure, the combustion is more efficient, requiring 20% less fuel for power generation. This results in less carbon dioxide emission compared with the subcritical technology. Moreover, modern technologies to get rid of pollutants including Selective Catalytic Reduction: SCR, Electrostatic Precipitator: ESP that can dispose dust more than 99.9%, and Flue Gas Desulfurization: FGD that sprays limestone to absorb sulfur dioxide have been installed. With these technologies, pollutant and carbon dioxide emissions are reduced. The power plant’s environmental quality control was installed in compliance with Pollution Control Department to show its real time data. Therefore, it is ensured that what is released during power generation process is better than standard criteria and is not the cause of PM 2.5, as can be seen that the PM2.5 level in Mae Moh is lower than that in the nearby provinces.

EGAT Learning Center
         Mae Moh Mine Museum in Commemoration of King Rama VII is located on the hill in the area of Mae Moh Mine’s botanical garden. It was built to raise awareness on coal power and importance of Mae Moh Mine which helps support the security of power system of the country. Electricity generation process and measures to reduce impacts on environment and community are also shown here. Inside the museum, there is a room for geology exhibition, the history of Mae Moh Mine, and electricity generation technology. Around the museum building, the outdoor exhibition to show mining tools and machines is available.

Gallery