Exergetic and thermoeconomic analyses of the rice-husk power plant in Thailand


  • Prachuab Peerapong The Joint Graduate School of Energy and Environment, King Mongkut’s University of Technology Thonburi
  • Bundit Limmeechokchai Sirindhorn International Institute of Technology, Thammasat University


Rice-husk fired power plant, Exergetic efficiency, Thermoeconomic analysis, Electricity generation


The purpose of this study is to analyze a rice husk power plant, and consider the efficiency of the power plant through both the first law and the second law of thermodynamics. The energetic and exergetic performance criteria such as thermal efficiency, exergy efficiency, and exergy loss have been found to be useful methods in design, evaluation, optimization and improvement of thermal power plants. The exergetic efficiency of a power plant shows that the boiler is the major component contributing to total loss, with its exergetic efficiency of 30%, while the steam turbine has the exergetic efficiency of 76%. The study also evaluates the economic consideration of a rice-husk fired power plant for heat and power production. The capacity of the plant is 576 tons paddy/day. The total load of thermal energy consumption is 1,062 MJ/ ton paddy and the electrical energy consumption of the rice mill is 6,518 MWh/year. The total capital cost of the rice husk-fired cogeneration is US$ 1.2 million (1 US$=35 Baht). The capacity of the back pressure steamfired boiler is 18 tons/hour of steam and 25 bar (absolute), 400°C. The rice-husk fired cogeneration can generate power of 1,432 kWe. Economic analyses in terms of net present value (NPV), simple pay-back period (PBP), and internal rate of return (IRR) are also evaluated. Results show that the rice husk-fired cogeneration has NPV of US$ 0.303 million /year, PBP of 3.7 years and IRR of 27%. Results of the study also show that rice husk-fired cogeneration is beneficial to power generation.


Download data is not yet available.


Kotas,T. J. 1985. The exergy method of thermal plant analysis. London: Butterworth.

Kamate, S.C. and Gangavati, P.B. 2009. Exergy analysis of cogeneration power plant in sugar industries. Appl. Therm. Eng. 29(5-6) : 1187 – 1194.

Ram, J. R. and Banerjee, R. 2003. Energy and cogeneration targeting for sugar factory. Appl. Therm. Eng. 23(12) : 1567-1575.

Kanoglu, M. and Dincer, I. 2009. Performance assessment of cogeneration plants. Energy Coversion Manage. 50(1) : 76-81.

Alonso-Pippo, W., Luengo, C.A., Koehlinger, J., Garzone, P. And Cornacchia, G. 2008. Sugarcane energy use: The Cuban case. Energy policy. 36(6) : 2163-2181.

Lobo, P.C., Jaguaribe, E.F., Rodrigues, J. and da Rocha, F.A.A. 2007. Economics of alternative sugar cane milling option. Appl. Therm. Eng. 27 : 1405-1413.

Purohit, P. and Michaelowa, A. 2007. CDM potential of bagasse cogeneration in India. Energy Policy. 35(10) : 4779-4798.

Bhattacharyya, S.C. and Quoc, T., Dang, N. 2004. Economic buy-back rates for electricity from cogeneration: Case of sugar industry in Vietnam. Energy. 29 : 1039-1051.

Alonso-Pippo, W., Garzone, P. and Cornacchia, G. 2007. Agro-industry sugarcane residues disposal: The trends of their conversion into energy carriers in Cuba. Waste Manage. 27 : 869-885.

Kuprianov, V.I., Janvijitsakul, K. and Permchart, W. 2006. Co- firing of sugar bagasse with rice husk in a conical fluidized-bed combustor. Fuel. 85 : 434-442.

Sathitruangsak, P., Madhiyanon, T. and Soponronnarit, S. 2009. Rice husk cofiring with coal in a short combustionchamber fluidized-bed comustor (SFBC). Fuel. 88(8) : 1394-1402.

Srivatsav, A. K. 1996. Selection of steam parameters for cogeneration. In: Proceeding of cogeneration in India 96. New Delhi, TERI : 158–162.

Nation Energy Policy Office. 2000. Thailand biomass-based power generation and cogeneration with in small industries. In: Final report on research conducted by Black & Veatch. Bangkok: Nation Energy Policy Office.

Natarajan, E, Nordin, A. and Roa, A.N. 1998. Overview of combustion and gasification of rice husk in fluidized-bed reactors. Biomass Bioenerg. 14 : 533-546.

Nussbaumer, T. 2003. Combustion and cocombustion of biomass: fundamental, technologies, and primary measure for emission reduction. Energy Fuel.

: 1510-1521.

Athasart, S. 2002. Cogeneration potential of parboiled rice mill in Thailand. Master Thesis. Bangkok : Department of Energy Management Technology, School of Energy and Materials, King Mongkut’s University of Technology.




How to Cite

P. . Peerapong and B. Limmeechokchai, “Exergetic and thermoeconomic analyses of the rice-husk power plant in Thailand”, J Met Mater Miner, vol. 19, no. 2, Apr. 2017.



Original Research Articles