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Direct Method and Indirect Method for Boiler Efficiency

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1/4/2021 · Qt=174876 KJ/hr From the formula (16), the boiler efficiency increase R2=0.016%.  To sum up, the efficiency of the boiler is increase by 0.51% after the retrofit in indirect method. Cost and energy conservation a) From the table 1, the average coal consumption

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Boiler is a most useful device for any developing industries to process & production. It is necessary to optimized good boiler efficiency. Boiler efficiency can be measured by two method, direct method and indirect method. Both methods give a different

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There are two methods of determining boiler efficiency 1. Indirect method 2. Direct method In indirect method, the efficiency is calculated by determining the losses in the boiler. For this, chemical analysis of the fuel and the flue gas analysis are the basis of calculation.

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Boiler Efficiency: Introduction and Methods of Calculation

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Indirect method is snapshot after boiler is tuned. Indirect efficiency gives us the efficiency of the boiler at a particular time. It does not give us the overall picture of the boiler over a period of time. The boiler is tuned to operate under certain specific conditions, but these conditions are never constant.

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7/10/2020 · Indirect Method Indirect method is based on all the losses in boiler. In this we estimate all the losses and subtract them from 100 to get indirect boiler efficiency. We can write down the formula for indirect method of efficiency as below: Total loss includes

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In the direct method, efficiency is calculated by dividing energy delivered by the boiler by energy input as fuel, using the equation: The method most standards follow is the indirect efficiency calculation method. In this method, each loss is individually calculated, and the sum of these losses is then subtracted from 100 to give efficiency %.

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A REVIEW OF INDIRECT METHOD FOR MEASURING THERMAL EFFICIENCY IN FIRE TUBE STEAM BOILERS AHMAD MAHMOUDI LAHIJANI1*, ERIS.E. SUPENI 2 AND FATEMEH KALANTARI 1Department of Mechanical Engineering, Faculty of Engineering, University Putra Malaysia, 43400 Serdang,

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12/4/2011 · Direct and Indirect efficiency in boilers -. Direct and indirect efficiency of boiler are the two methods for finding boiler efficiency, Direct method is quick method for boiler efficiency calculation, In this method, Below Excel sheet may be used to calculate indirect boiler efficiency.

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15/6/2012 · THE INDIRECT METHOD IS LESS RELIABLE THAN THE DIRECT METHOD Example 1 :20 TPH, imported coal fired AFBC boiler, with Coal GCV as fired of 3100 Kcal / Kg, was taken as a case study. Operating Steam Load of 18 TPH (90% of design) was audited by a reputed company & certified that the Boiler was operating at 81.4% efficiency by the Indirect Method.

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Basically Boiler efficiency can be tested by the following methods: 1) The Direct Method:Where the energy gain of the working fluid (water and steam) is compared with the energy content of the boiler fuel. 2) The Indirect Method:Where the efficiency is the difference between the losses and the energy input. 1.6 The Direct Method Testing 1.6.1.

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The following article will guide you about how to calculate boiler efficiency by indirect method. Definition of Boiler Efficiency: The boiler efficiency is defined as the ratio of heat actually used for producing steam in a certain period to the heat supplied in the furnace during the same period. Both quantities being measured in the same units.

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8/8/2011 · BOILER EFFICIENCY – DIRECT METHOD. The Direct Method Testing. This is also known as 'input-output method' due to the fact that it requires only the useful steam output and the heat input by fuel for finding the efficiency. Water consumption and coal consumption were measured in a coal-fired boiler at hourly intervals.

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There are two methods to assess boiler efficiency.1) Boiler efficiency by Direct Method: Where the energy gain of the working fluid (water and steam) is compared to the energy content of the boiler fuel.2) Boiler Efficiency by Indirect Method

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method and indirect method. Direct method does not include any losses for calculating boiler efficiency, while indirect method includes all the heat losses from a system to find boiler efficiency. This project will give the information about the indirect method

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24/11/2016 · There are two methods of assessing boiler efficiency. 1) Boiler Efficiency by Direct Method: Where the energy gain of the working fluid (water and steam) is compared with the energy content of the boiler fuel. 2) Boiler Efficiency by Indirect Method: Where the

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14/1/2015 · Unburnt losses in bottom ash (Carbon) Boiler Efficiency by indirect method = 100 - (L1 + L2 + L3 + L4 + L5 + L6 + L7 + L8) 6. This is also known as 'input-output method' due to the fact that it needs only the useful output (steam) and the heat input (i.e. fuel) for evaluating the efficiency.

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Boiler Efficiency: Introduction and Methods of Calculation

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