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Industrial Cogeneration

Apart from sugar, palm oil, rice and wood industries, several other industries use cogeneration, especially where there is a demand for steam in addition to electricity. Where natural gas pipeline is available at reasonable price, industries are going for natural gas cogeneration. Some industries are using coal fired cogeneration plant. Waste gas and black liquor are also used in industrial cogeneration plants. In general, the overall efficiency of cogeneration plant is higher than separate power generation and

 

steam generation systems. However, careful analysis is needed to decide on power plant or cogeneration plant based on several factors including annual hours of steam requirement. In general, the overall efficiency of cogeneration plant is higher than separate power generation and steam generation systems. However, careful analysis is needed to decide on power plant or cogeneration plant based on several factors including annual hours of steam requirement.

Modern efficient cogeneration concept is also successfully used in industrial estates. One such example is the 514 MWe hybrid cogeneration plant installed in Map Ta Phut Industrial Estate and Eastern Industrial Estate, Thailand, which supplies around 200 tphsteam to various industries. The plant is in operation since 1999 and uses natural gas and imported coal.

Gas cogeneration,trigeneration

Cogeneration in commercial buildings and airports using natural gas is a modern concept for Asia. One of the best examples is the 26 MWe natural gas based cogeneration plant installed in the twin tower building in Kuala Lumpur in 1996. The steam generated in the heat recovery boiler is used in the absorption chillers to produce chilled water, which provides the cooling load required for air conditioning.

Cogeneration in commercial buildings and airports using natural gas is a modern concept for Asia. One of the best examples is the 26 MWe natural gas based cogeneration plant installed in the twin tower building in Kuala Lumpur in 1996. The steam generated in the heat recovery boiler is used in the absorption chillers to produce chilled water, which provides the cooling load required for air conditioning.

The electricity produced from the gas turbines is used in the building. The excess electricity is supplied to the grid. Another good example of building cogeneration is the 40 MWe natural gas cogeneration system used in Kuala Lumpur International Airport, which is in operation since 1997.

Though different types of fuels can be used for building cogeneration, natural gas is the most commonly used fuel for building cogeneration. Micro turbines are also used for building cogeneration. Micro turbines are relatively a new concept of technology in Asia, having a small gas turbines in the range of 25-200 kW, developed and packed for distributed generation and small scale cogeneration. In trigeneration concept, apart from electricity generation and cooling application, thermal energy is also used for process heating application.

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