Deterioration of fuel quality and water quality also leads to poor performance of boiler. In these boilers most common among older plants, bagasse is gravityfed through chutes and piles onto a refractory hearth. Online calculator to quickly determine boiler efficiency. Pdf boilers, boiler fuel and boiler efficiency sasta pdf first and second law to analyze the performance of bagasse boilers 4 apr 2011 using the energy balance method and the fuel lower heating value as calculation. For all the boilers analyzed, the optimal value of this parameter ranges between 1. Except bagasse, this series steam boiler could also. After analyzing heat losses in industrial boilers, boiler engineers or technicians can help you to increase your boiler efficiency by 6% 10% here are the few boiler efficiencies boosting steps listed below complete combustion of fuel so that no unburnt is left behind is a good practice and will add to the boiler efficiency. Pdf efficiency calculations of bagasse fired boiler on.
The first interest shown in bagasse drying with boiler stack gases dates back to 1910, when prof. Ptc576, is determined when applying these definitions. Faq about calculation of steam production for boiler from bagasse. In order to calculate boiler efficiency by this method, we divide the total energy output of a boiler by total energy input given to the boiler, multiplied by hundred. The boiler efficiency evaluated by direct method is. Shafi sabir, khuram ejazdepartment of farm machinery and power, university of agriculture, faisalabadpakistanabstract moreover, to. Performance evaluation of boiler in 46mw bagasse based. Boiler grates boilers, boiler fuel and boiler efficiency a wienese sugar milling research institute, durban 4041, south africa are typically designed for a heat release rate of about 3 mwm 2 for bagasse and 1,5 mwm 2 for coal.
Boiler efficiency is defined as the heat added to work in fluid expressed as a calculations in msexcel sheet 2 input sheet the following. Mar 9, 2017 average bagasse consumption for boiler 70 tph. In the direct method consideration is given to the amount of heat utilized while evaluating the efficiency of the boiler, whereas, indirect method accounts for various heat losses. Q quantity of steam generated kghr h enthalpy of steam kcalkg h enthalpy of water kcalkg. Performance evaluation of industrial boiler by heat loss. Combustion efficiency measurements on bagasse fired boilers maples, d on. Some consulting engineers calling tenders for steamraising plants for sugar mills. A typical indirect dryer for bagasse application can be a bin dryer. Factors affecting the safe and efficient operation of. There is a great contrast of boiler efficiency when used dry or wet bagasse 50% moisture, resulted as 52% and 84% respectively. Efficiency calculations of bagasse fired boiler on the basis of flue gases. How to calculate boiler efficiency by direct method. Efficiency calculations of bagasse fired boiler on the efficiency calculations of bagasse fired boiler on the calculated the efficiency of a bagasse fired boiler having steam for further calculation.
Boiler efficiency by direct method this is also known as inputoutput method due to the fact that it needs only the useful output steam and the heat input i. The fuel energ y flow as input to the systems, qrf, corr ected to. Sitong boiler takes several breakthroughs on boiler design, such as membrane water cooling wall, low thermal inertia design, and water cooling combustion chamber. Design of bagasse dryer to recover energy of water tube. Boiler efficiency is a quantity that indicates the relationship between input energy entering the boiler with output energy produced by the boiler. Efficiency vs moisture calculations has been measured.
Improve the efficiency of boiler by reduce the moisture in bagasse. Simplified view of main mass flowrates for a bagasse boiler. With the oldfashioned plant it was considered quite satisfactory if a boiler gave an efficiency of 40%, and very often mills would run for long periods at a lower efficiency than this. Efficiency calculations of bagasse fired boiler on the basis of flue gases efficiency calculations calculation of steam production. Properties and operating experience with bagasse as a. Efficiency for different gcv has been shown in this paper for fbc boiler and this paper also gives the description of calculation of efficiency for fbc boiler. A simplified view of the boiler is presented in figure 1. Waterwall boiler all large and many intermediatesized boilers are watertube boiler with a boiler section that consists of closelyspaced water tubes covering the furnace wall.
Pdf bagasse fired boilers digitised collections the efficiency of bagasse fired boilers has been increased to well over 70%. Discussions that follow focus on fuels commonly fired in boilers to generate steam or hot water, atmospheric emissions associated with fuel combustion, and factors that influence how effectively the energy content of the fuel is transferred into usable heat. Boilers bureau of energy efficiency 27 syllabus boilers. Munir and others published efficiency calculations of bagasse fired boiler on the basis of flue gases temperature and total heat values of steam find, read and cite all. Introduction many bagassefired boilers around the world especially the older ones are. Improvement of boiler efficiency using bagasse dryer.
Kerr louisiana bulletin 1911 showed that it was impossible in som. Bagasse fired water tube steam boiler is horizontal type double drums water tube boiler with high steam quality, the combustion equipment is chain grate. Efficiency calculations of bagasse fired boiler on the. Pdf comparing boiler efficiency calculation methods. A bagasse fired boiler equipped in a sugar mill is producing 80 mw of heat steam power at the operating efficiency of 62%. Pdf energy conservation in bagasse fired boiler international. In a bagasse fired boiler, the airheater is normally. Improve the efficiency of boiler by reduce the moisture in. Weighed quantities of coal were fed to the boiler during the trial period. Combustion efficiency measurements on bagasse fired. This has led to a reduction in bagasse consumption, and resulted in less coal having to be burnt.
Emissions of so 2, nox, pm and hg from the bagassefired boilers the blue dash line mean the regulation for solidfuelfired boiler in china, the red one is for gasfired boiler. Horseshoe boilers and fuel cells differ in the shapes of their furnace area but in other respects are similar in design and operation. Boiler efficiency, in the simplest terms, represents the difference between the energy input and energy output. Calculation of mass of dry gas per standard cubic feet of fuel. Efficiency figure depends upon the type of boiler as well as on the type of fuel and its constituents. The individual contributions of all heat losses on the overall boiler efficiency have been determined, yielding an efficiency chart for these bagasseboilers and the range of optimal stoichiometric ratio at the exit of the boiler. All our boiler design we offer design consultancy for various industrial boilers like oil fired boiler, gas boiler, wood boiler calculations. As a result of improvement in design of furnace, and improved boiler settings the efficiency of bagasse fired boilers has been increased to well over 70%. Water tube or water in tube pdf high efficiency boiler technology for sugar eeas. Bagasse combustion analysis for heat value and combustion requirements carried out based on chemical reaction method stoichiometric quantities. Shafi sabir, khuram ejazdepartment of farm machinery and power, university of agriculture, faisalabadpakistanabstract moreover, to meet world trade organization wto.
Here calculation has been done for the 100tph fbc boiler used in the prakash industries afbc type using indian lignite coal having a different chemical composition and properties. This paper presents briefly on the boiler efficiency evaluation procedures by direct and indirect methods useful in thermal power plants. Fuel cells, horseshoe boilers, and spreader stoker boilers are used to burn bagasse. A bagasse fired boiler equipped in a sugar mill is. Boiler efficiency based on ncv can be calculated from the formula mentioned. Performance of wet and dry bagasse combustion in assalaya. The content of this report entails details on the calculations undertaken to determine a typical bagasse fired boiler efficiency using the conventional direct combustion bagasse fired water tube high pressure boilers. More recently cfd has been extensively used in the design of a new generation, low capital cost improved performance bagassefired boiler. Boiler performance is stable, and it has been operating efficiently when firing bagasse. Should industrial bagassefired boilers be phased out in. The boiler efficiency does not only depend on the boiler configuration and operation but also on the fuel being used. The increase in boiler efficiency and the increase in steam to bagasse ratio because of lower moisture content in bagasse. Recen tly a program of work on bagasse utilization was initiated at as two field and laboratory studies have resulted in theses on bagasse quality by aquirre 3 and bagasse boiler operation by kwok 4.
On the optimization of boiler efficiency using bagasse as. Types, combustion in boilers, performances evaluation, analysis of losses, feed water treatment, blow down, energy conservation opportunities. Pdf adobe acrobat analysis of new boiler technologies the additional capital cost outstrips the additional a bagasse fired boiler is really. Efficiency of a coal fired boiler in a typical thermal. Following data has been taken to calculate boiler efficiency for bagasse as fuel a ultimate. Munir and others published efficiency calculations of bagasse fired boiler on the basis of flue gases temperature and. Boiler design and calculation free download as word doc. Calculation and example test data and calculation water consumption and coal consumption were measured in a coal fired boiler at hourly intervals. Higher moisture content in bagasse reduces its efficiency. However, the boiler efficiency calculation can be defined in three ways. Consequently, a difference of just a few percentage points in boiler efficiency between units. For example, efficiency of a bagasse fired boiler is about 70% where as that of oil fired boilers is about 85 %.
Ask price view more doc boiler efficiency and cooling tower efficiency. Sep 20, 2014 it is vital to understand the basic efficiency calculation approach for a conventional bagasse fired hp steam boiler before any studies of new systems can be. Bagasse from sugar production is used in biomass power plants with total consumption. Energy performance assessment of boilers bureau of energy efficiency 1 1. This paper describes a typical sugar factory boiler, the analysis of boiler fuel and discusses the calculation of boiler efficiency. Opportunities for improving the performance and reducing. The automatic bagasse feeder has also played a big part in the advance of the bagasse. Eq12 assumptions the assumptions used in this calculation are the following. This efficiency can be evaluated using the formula. Pdf efficiency calculations of bagasse fired boiler on the basis of. For interpretation of the references to colour in this figure legend, the. Exergy analysis and performance optimization of bagasse fired boiler. One percent energy loss from radiation and surface convection.
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