Fire and Ice
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Fire and Ice
Natural gas – a majority of which stems from the offshore gas deposits in the Gulf of Thailand – is one of the country’s key natural resources. As an energy source it accounts for 70 percent of the electricity production. As Thailand and its nine partner countries in the new ASEAN Economic Community (AEC) achieve higher export targets and improved living standards, the challenge of diminishing gas reserves is starting to emerge. In response, private-sector small power producers in Thailand are turning to Siemens turbine technology to meet the demand for greater fuel efficiency.
Fire and Ice
The Amata City Industrial Estate, which was designed on a city scale southeast of Bangkok, is a pioneering model for Thailand’s new industrial economy. Inside that sprawling estate, Amata B.Grimm Power Group (ABP) operates two state-of-the-art cogeneration plants to produce electricity and pressurized steam for a nearby factory and feed surplus power into the national grid.
“Before we decide to invest in anything, we have to make sure this is the best option available,” says Preeyanart Soontornwata, President of Amata B.Grimm Power Group (ABP). “With the Siemens SGT-800 gas turbines, we are able to generate electricity very efficiently, allowing us to decrease our fuel consumption.” In 2011, ABP ordered two SGT-800 gas turbines and a SST-400 steam turbine, and in 2013 another ten SGT-800 gas turbines and five SST-400 steam turbines for its small power plants at different locations in Thailand.
High efficiency and low emissions are convincing national regulators in Thailand to approve ever more private-sector small power plants.
At the cogeneration combined cycle power plants in Rayong, recovering the exhaust heat of the Siemens SGT-800 industrial gas turbines to feed an SST-400 steam turbine maximizes fuel efficiency. Cherdchai Yiwlek, Managing Director of Amata B.Grimm Power Rayong 1 & 2 Ltd, points out: “The SST-400 steam turbine adds another 40 megawatts of electrical power to our approximately 50-megawatts output from each of the gas turbines.” The surplus steam is sent down a fat pipe to a nearby factory to melt and mold material for industrial products. “There is no waste heat here,” says Cherdchai. “For us, exhaust heat is money.”
Since 2010, Siemens obtained orders from four different independent power producers in Thailand for more than 45 SGT-800 gas turbines, 20 of which have already gone into commercial operation. Its fuel flexibility is outstanding: It can operate on gas from the Gulf of Thailand, the low-calorific gas from the Andaman Sea, as well as on diesel, with on-load switchover between fuels. In combined cycle operations the performance of the SGT-800 is best in class for its size. All SGT-800 units are equipped with a DLE combustion system to minimize NOX and CO emissions.
For Thailand, distributed power generation with the SGT-800 gas turbine is a success story on many levels: Small power producers located near their customers inside industrial parks are optimizing the usage of natural gas – thereby helping to preserve offshore gas reserves.
The Siemens SGT-800 industrial gas turbine combines a reliable robust design with high efficiency and low emissions. This makes the SGT-800 an excellent choice for Industrial, Refinery and Oil & Gas applications in simple cycle, cogeneration or combined cycle installations.
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