A Method for Exergy Analysis of Sugarcane Bagasse Boilers

Cortez, L. A. B.; Gómez, Edgardo Olivares

doi:10.1590/s0104-66321998000100006

Cited by 20 publications

(10 citation statements)

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“…Sugarcane bagasse has a high nutritional value for beef cattle (Bulle et al, 2002;Leme et al, 2003) and presents high energy value (Cortez & Gómez, 1998;Sosa-Arnao et al, 2004). In addition, it is used for generating energy by the sugar plants and to produce ethanol, limiting its use as poultry bedding.…”

Section: Selecting the Most Adequate Bedding Materials For Broiler Promentioning

confidence: 99%

Selecting the most adequate bedding material for broiler production in Brazil

Garcia

Paz

Caldara

et al. 2012

Rev. Bras. Cienc. Avic.

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Alternative bedding material, broiler production, multiple criteria analysis, AHP. ABSTRACTBroiler chicken production is widely dispersed across the globe, and one important issue for growers is the selection of adequate bedding material, as the availability and price of substrates varies among countries and regions within a same country. This study aimed at applying a multiple criteria analysis approach for the selection of the most appropriate bedding material for broiler production. Based on field research data and growers' experience, the most desirable characteristics of a litter material were chosen as the main criteria. The selected materials were wood shavings, rice husks, chopped Napier grass (Pennisetum pupureum), 50% sugar cane bagasse (Saccharum L.) plus 50% wood shavings, 50% sugar cane bagasse (Saccharum L.) plus 50% rice husks, and pure sugar cane bagasse (Saccharum L.). The analytical hierarchy process (AHP) was applied for selecting the most suitable bedding material. Validation was performed using data from previous studies carried out in central-western Brazil on the effects of different types of bedding material on broiler carcass quality. Considering the selected criteria, several bedding materials were tested and ranked, and the results showed that wood-shavings litter was the best option (weight = 0.28), followed by rice husks (weight = 0.24). All other tested alternatives presented lower scores and were, therefore, not considered for use. The AHP approach was found to be an efficient tool to select the most appropriate litter material under specific scenarios.

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Section: Selecting the Most Adequate Bedding Materials For Broiler Promentioning

confidence: 99%

Selecting the most adequate bedding material for broiler production in Brazil

Garcia

Paz

Caldara

et al. 2012

Rev. Bras. Cienc. Avic.

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“…Exergetic efficiency of cogeneration plant as a whole is determined. For the analysis reported within this article, the calorific value (LHV) and chemical exergy of mill-wet bagasse are assumed to have an average value of 7650 kJ/kg and 9890 kJ/kg respectively [9][10][24][25]. The average steam to bagasse ratio at this pressure and temperature conditions is 2.25 [1,2,9].…”

Section: Performance Analysismentioning

confidence: 99%

Exergetic Comparison of Bagasse-based Cogeneration Plants

Kamate¹,

Gangavati²

2011

Distributed Generation & Alternative Energy Journal

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Sugar industry employs different cogeneration schemes to satisfy the plant's process steam demand and generate possible surplus power by upgrading the steam inlet parameters. Though, energy efficiencies are most commonly used up to now, a thermodynamically more accurate evaluation and more fair comparison between different systems can be based on exergetic efficiency. In the light of this, in this article exergetic performance comparison of three actual heat-matched, bagasse-based cogeneration plants working in, three different sugar mills located in, Belgaum district, Karnataka State, India, namely (i) Hira Sugar Works Ltd (HSWL) (ii) Doodhaganga Krishna Sahakari Sakkare Karkhane Ltd (DKSSK), (iii) Ugar Sugar Works Ltd (USWL) is presented. In the analysis, in addition to the more conventional energy analysis, exergy analysis is employed to evaluate overall and component efficiencies and to assess the thermodynamic losses. The results indicate that the three-cogeneration plants perform with energy and exergetic efficiency of 0.702, 0.628, 0.648 and 0.187, 0.234, 0.225 respectively for HWSL, DKSSK and USWL. Boiler is the major component contributing most to the overall in-efficiency in all the three plants.

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“…The energy efficiency and exergy efficiency of the plant are compared. For the analysis presented in this research, the average calorific value (LHV) and fuel exergy of mill-wet bagasse are assumed as 7650 kJ/kg and 9890 kJ/kg, respectively [3,23,24]. In the proceeding section, the distribution of loss of exergy in the plant's components is estimated.…”

Section: Performance Analysismentioning

confidence: 99%

Exergetic, Thermal, and Fuel Savings Analyses of a Heat-matched, Bagasse-based Cogeneration Plant in Sugar Industries

Kamate

Gangavati²

2009

Cogeneration & Distributed Generation Journal

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The sugar industry employs different cogeneration schemes to satisfy process steam demand, and generates surplus power by upgrading the steam inlet parameters. A wide range of steam inlet parameters is used in Indian sugar industries, and varies from 21 bar to 110 bar in pressure and 330°C to 540°C in temperature. Most of the people understand that higher pressure (HP) steam inlet conditions result in more efficient power plant. In this article, exergy methods, in addition to more conventional energy analysis, are employed to evaluate overall and component efficiencies and to identify and assess thermodynamic losses. The analysis is carried out for a heat-matched bagasse-based cogeneration plant of a typical 2500 tcd sugar factory using a backpressure steam turbine and an extraction condensing steam turbine for a wide range of steam inlet conditions; selected around the sugar industry's export cogeneration plant for better choice of cogeneration plant configuration. The results indicate that a backpressure turbine plant achieves the highest energy and exergetic efficiency, and fuel savings; the condensing turbine plant generates maximum power per tonne of cane processed. Steam inlet conditions of 61 bar and 475°C can be considered as the optimal steam parameters that yield the best thermodynamic advantage. Exergy analysis of the components indicates that the turbine is the most efficient and the boiler is the least efficient component of the plant.

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A Method for Exergy Analysis of Sugarcane Bagasse Boilers

Cited by 20 publications

References 0 publications

Selecting the most adequate bedding material for broiler production in Brazil

Selecting the most adequate bedding material for broiler production in Brazil

Exergetic Comparison of Bagasse-based Cogeneration Plants

Exergetic, Thermal, and Fuel Savings Analyses of a Heat-matched, Bagasse-based Cogeneration Plant in Sugar Industries

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