Cogeneration in a solid-wastes power-station: a case-study

Holanda, Marcelo R.; Balestieri, José Antônio Perrella

doi:10.1016/s0306-2619(99)00022-7

Cited by 8 publications

(5 citation statements)

References 6 publications

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“…For the full load condition the simulation started by having the steam leaving the boiler at 55 bar, 437°C and 105 t/h. Firstly, the steam expansion in the turbine is calculated using equations ( 6) to (8) in the Appendix for control volume 1. Note that the control volumes are those given in Figs 2 and 3.…”

Section: Mathemathical Model and Simulation Of The Operationmentioning

confidence: 99%

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Strategy for optimal operation of a biomass-fired cogeneration power plant

Prasertsan

Krukanont

Ngamsritragul

et al. 2001

Proceedings of the Institution of Mechanical Engineers, Part A:

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Biomass-red cogeneration not only is an environmentally friendly energy production, but also possesses high energy conversion ef ciency. Generally, the wood product industry requires both heat and electricity. Combined heat and power generation (cogeneration) using wood residue has a three-fold bene t: waste minimization, reduction of an energy-related production cost and additional income from selling the excess electricity to the utility. In reality, the process heat demand uctuates according to the production activities in the factory. The uctuation of process heat demand affects the cogeneration ef ciency and the electricity output and, consequently, the nancial return, since the prices of heat and electricity are different. A study by computer simulation to establish a guideline for optimum operation of a process heat uctuating cogeneration power plant is presented. The power plant was designed for a sawmill and an adjacent plywood factory using wood wastes from these two processes. The maximum boiler thermal load is 81.9 MW while the electricity output is in the range 19-24 MW and the process heat 10-30 MW. Two modes of operation were studied, namely the full (boiler) load and the partial (boiler) load. In the full load operation, the power plant is operated at a maximum boiler thermal load, while the extracted steam is varied to meet the steam demand of the wood-drying kilns and the plywood production. The partial load operation was designed for the partially fuelled boiler to provide suf cient steam for the process and to generate electricity at a desired capacity ranging from the rmed contract of 19 MW to the turbine maximum capacity of 24 MW. It was found that the steam for process heat has an allowable extracting range, which is limited by the low pressure feed water heater. The optimum operation for both full and partial load occurs at the lower limit of the extracting steam. A guideline for optimum operation at various combinations of electricity output and steam demand is presented. The maximum achievable overall ef ciency is 64.6 per cent when the power plant is operated at partial (boiler) load condition for 19 MW electricity and 30 MW process heat. The full load operation, although having lower overall ef ciency, is preferable nancially because of the higher unit price of electricity in comparison with heat.

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Section: Mathemathical Model and Simulation Of The Operationmentioning

confidence: 99%

“…The optimization parameters in their study were cost, revenues, reliability, pollutant emission and energetic ef ciency. A cogeneration system fuelled by municipal solid wastes (MSW) was studied recently [8]. The dependent variable was the steam conditions at the boiler outlet.…”

mentioning

confidence: 99%

Strategy for optimal operation of a biomass-fired cogeneration power plant

Prasertsan

Krukanont

Ngamsritragul

et al. 2001

Proceedings of the Institution of Mechanical Engineers, Part A:

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“…Conventional waste landfills occupy large amounts of land and lead to serious environment problems [2]. Incineration technology was developed to reduce the total volume of waste and make use of the chemical energy of MSW for energy generation [3,4]. However, the emissions of pollutant species such as NOx, SOx, HCl, harmful organic compounds [5,6], and heavy metals [7,8] are high in the incineration process.…”

Section: Introductionmentioning

confidence: 99%

Research on MSW (Municipal Solid Waste) Gasification by CFB (Circulating Flue Bed)

Liu

2014

AMR

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The paper proposes application of municipal solid waste CFB gasification as well as of the possible plant configurations and the environmental performances of the main commercially available gasifiers for municipal solid wastes. The case indicates that gasification is a technically viable option for the solid waste conversion, including residual waste from separate collection of municipal solid waste. It is able to meet existing emission limits and can have a remarkable effect on reduction of landfill disposal option. However, the operational difficulties experienced at several pilot and demonstration plants indicate that long-term operating results from a large industrial plant are needed before gasification can be considered a reliable alternative to combustion.

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“…A case study by Holanda and Balestieri [6] addressed questions involved in the energy generation and presented solid-waste burning as a possible alternative fuel for the future, especially in the context of cogeneration practice in which the thermal and electric energy are used primarily for the industries located in an industrial district. Two cogeneration schemes were proposed for the burning of municipal solid wastes, associated or not with natural gas, and their technical and economic feasibilities were examined.…”

Section: Introductionmentioning

confidence: 99%