2) The Indirect Method: Where the efficiency is the dif-ference between the losses and the energy input. Parameters The parameters needed to calculate this method are given below. • No explanation for low efficiency. 2 Oil: $2.50 per one gallon at 140,000 btu/unit. Advantage • Quick evaluation. This matter push the researcher to check the the phenomenon use the indirect method ( indirect
Aug 30, 2016 · Thermal efficiency % of (heat) energy input that is effectively useful in the generated steam BOILER EFFICE CALCULATION 1)DIRECT METHOD: 2) INDIRECT METHOD: The energy gain of the the efficiency is the working fluid (water and steam) different between losses is compared with the energy and energy input 25 content of the boiler fuel.
In this study, the efficiency of a fluidized bed boiler having a steam production capacity of 462000 kg/h and 17.2 bar pressure was calculated by using indirect method.
Apr 12, 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.
In real practice, two techniques are usually used to find out boiler performance, namely direct method and indirect method of efficiency calculation. Direct efficiency This is also recognized as the input-output method because it requires only the valuable output like steam and the heat input for estimating the boiler efficiency.
The indirect method shall be followed in the present experiment to determine the thermal efficiency of the boiler. Indirect method is also called as heat loss method. The disadvantages of the direct method can be overcome by this method, as it determines various heat losses associated with boiler.
Boiler Efficiency Calculation by Indirect Method | Thermodynamics
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 efficiency is the difference between the losses and the energy input. Boiler vs. Furnace Energy Efficiency The first thing to note when
Indirect method Indirect method determines the efficiency of a boiler by the sum of the major losses and by the fuel power of the boiler: φlosses η =1− (15) φinput where φ losses is the sum of the major losses within the boiler, and φ input is the fuel power of the boiler. The indirect method provides a better understanding of the effect
2.5.2 Indirect Method Testing Similar to the method of evaluating boiler efficiency by indirect method, furnace efficiency can also be calculated by indirect method. Furnace efficiency is calculated after subtracting sensi-ble heat loss in flue gas, loss due to moisture in flue gas, heat loss due to …
Apr 14, 2014 · The ASME PTC 4-2013 Fired Steam Generators, updated in February 2014, contains two methods of determining overall boiler efficiency: the direct method and indirect method. The direct method, otherwise known as input-output method, measures the heat addition to steam divided by the gross heat in the fuel.
A boiler's indirect efficiency is determined by finding the individual losses enchanting in place in a boiler and then deducting those amounts from . Moreover, this technique includes finding the magnitudes of entire calculable losses enchanting place in a boiler by individual measurements.
The losses that are applicable liquid, gas and solid fired boilers. 1. energy performance assessment of boilers - Bureau of Energy The steam table, psychometric chart, calculator are to be arranged for computation of boil- er efficiency. 1.7.4 Boiler Efficiency by Indirect Method: Calculation.
As we are aware, boiler efficiency can be stated in two different ways, one being direct and another, indirect. Each method has its own advantages and disadvantages. The direct method gives us more realistic efficiency values but in order to understand where the losses are taking place, indirect efficiency will be more helpful.
Boiler efficiency 77.8% 81.35% Table 4: Efficiency calculated by Direct and Indirect Method . Boiler efficiency AFBC (Atmospheric Fluidised Bed CFBC (Circulating Fluidised Bed Combustion) 80.58% 83.94% Indirect Method 77.8% 81.35% . 6. Discussion . As GCV of the coal is increases efficiency …
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
efficiency in steam boilers, direct method (input-output method) and indirect method (heat loss method). The errors in direct method make significant change in efficiency thus indirect method is more accurate method for measuring the efficiency. The indirect method is the focused method in this study, therefore various type of losses be evaluated.
Thermal efficiency % of (heat) energy input that is effectively useful in the generated steam BOILER EFFICE CALCULATION 1)DIRECT METHOD: 2) INDIRECT METHOD: The energy gain of the the efficiency is the working fluid (water and steam) different between losses is compared with the energy and energy input 25 content of the boiler fuel.