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Title: Potential of cogeneration in Thai palm oil mills
Authors: Wibulswas, Prida
Keywords: Vegetable oils
Palm oil
Issue Date: 1992
Type: Preprint
Series/Report no.: REP148 1992;c.1
REP148 1992;c.2
Abstract: Large palm oil mills cogenerate heat and power for their internal consumptions. Spent fibre, kernel shells and empty fruit bunches are used as the boiler fuel in the steam cogeneration plants of the palm oil mills. As the boiler pressures are not high and surplus steam from the turbine is exhausted to atmosphere, efficiencies of the existing cogeneration plants are low and electricity has to be partially imported from the national grid. A feasibility study, based on a large mill with a milling capacity of 30 tons of fresh fruit bunches per hour, shows that a high-pressure cogeneration plant could generate 1207 kWe from which 607 kWe should be available for export, if surplus steam is used to preheat feed water. If the cost of fuel is not included, the costs of electricity and steam based on exergy are 1.99 USc/kWh and 0.555 USc/MJ. The financial analysis based upon the non-firm buy back rate yields the electricity cost at USc 2.8/kWh with 50% of the boiler cost credited. Based on the assumption that 0.538 M tons of spent fibre and kernel shells would be available annually, the total potential of generating capacity for all palm oil mills would be 22.5 MWe.
Description: Research and development journal of the engineering institute of Thailand. 3, 2 (1992) : p. 48-55.
Appears in Collections:Other Publications

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