Manjung 4 (Generating Facility 2) – 1 x 1000 MW Ultra-Supercritical (USC) Coal-fired
Manjung 4 took 4 years to plan, construct and commission and is the most efficient power plant in South-East Asia which utilizes the latest ultra-supercritical combustion technology. The power supplied by Manjung 4 further boosts the generating capability of TNBJ to 3,100MW since its Commercial Operation Date (COD) on 14th April 2015, turning it into Peninsular Malaysia’s largest independent power producer to date.
The 1,000MW of power generated – equivalent to the electricity needs of two million households – contributes towards further stability of the grid system and enhanced reliability of supply to the nation.
Manjung 4 is composed of one two-pass, ultra-supercritical, once-through pulverised coal boiler and operates at a superheater steam temperature of 600°C and at pressures of 282.4 barg. Ultra-supercritical plants operate at temperatures and pressures above the critical point of water, which results in higher efficiencies. It also requires less coal per megawatt-hour and this leads to lower emissions (including carbon dioxide and mercury).
It also composed of one steam generator with one high pressure, one intermediate pressure and two double-flow low pressure turbines. The turbine is coupled to one two pole turbo generator with water and hydrogen cooling.
Like Manjung 1, 2 & 3, Manjung 4 uses seawater flue gas desulfurization (SWFGD). About 20% of the seawater drawn for plant cooling is used in the FGD system, and the system can absorb more than 90% of SO2 emissions. The FGD effluent is mixed with cooling water exiting the plant, treated to increase the dissolved oxygen, and returned to the ocean. Though this process results in a slight increase in sulphate content of the seawater as well as lowering the pH, the effluent is well within environmental standards and creates no harmful by-products.