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Nov 03, 2006 · FACTOR OF EVAPORATION Water enters the boiler at 225°F. The boiler pressure is 100 psi and the boiler water temperature is 338°F. The latent heat is 881 Btu. What is the factor of evaporation? FE = SH + LH / 970.3 FE = SH + LH / 970.3 FE = ((338 - 225) + 881) / 970.3 FE = 1.02 Where, FE factor of evaporation SH sensible heat LH latent heat

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Learn MoreA boiler produced equivalent evaporation rate 5,000kg/h. If this boiler operates under pressure and feed water temperature are 5 barg and 25°C respectively. What is the actual evaporation rate? At P = 5 barg, h ga = 2757kJ/kg and, feed water temperature 25°C,h fa = 25°C X 4.19kJ/kg°C = 104.75kJ/kg

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Learn MoreJun 23, 2017 · Equivalent evaporation actually indicates the amount of heat added in the boiler for steam generation. Equivalent evaporation refers to the quantity of dry saturated steam generated per unit of time from feedwater at 100°C to steam at 100°C at the …

Learn MoreBoiler Performance Parameters 1. Equivalent evaporation from and at 100 C 2257 Total heat required to evaporate feed water /w of fuel 2257 2257 kg kg m h h m m h h e f s w u Where, h= enthalpy of steam (kJ/kg) h w = enthalpy of feed water (kJ/kg) f s e m m m mass of water actually evaporated in kg per kg of fuel burnt. 2. Factor of Evaporation

Learn MoreEquivalent evaporation definition is - the rate in pounds per hour at which water would be vaporized in a given steam boiler if supplied and evaporated at the normal …

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Learn MoreMar 17, 2015 · Steam, Boiler, and Blowdown Pressure are the same. Combustion Efficiency is the % of fuel energy that is directly added to the feedwater and not otherwise lost or used. Blowdown Rate is the % of incoming feedwater mass flow rate that leaves the boiler as a saturated liquid at boiler pressure.

Learn MoreTherefore, the equivalent evaporation of a boiler, from and at 1000C is: ms(h2 – h1) kg in the given time or per kilogram of fuel 2256.9 QUESTION 1.1 A boiler with super heater generates 6000 kg/h of steam at a pressure of 15 bar, 0.98 dry at exit from boiler and at a temperature of 300oC on leaving the super heater. If the feed

Learn MoreOct 23, 2018 · This video explains how to find out boiler efficiency and equivalent evaporation.This question we have from Thermodynamics May 2018 question paper of Savitri

Learn More250+ TOP MCQs on Evaporative Capacity and Equivalent … 2020/12/19 · One boiler is producing 1591 kg of steam per hour at 1.2 factor of evaporation and an efficiency of 65% and another boiler produced 1364 kg of steam per hour at 1.15 factor of evaporation and an efficiency of 60%. How many hrs. will the coal in the bunker run the. Read More

Learn MoreA boiler is fired with fuel having calorific value 30000 kJ/kg. It produces steam at 5 bar. The dryness fraction of the steam generated 0.85. The efficiency of the boiler is 77% and the evaporative e capacity of the boiler is 10 kg of steam per kg of fuel. Determine the temperature of feed water.

Learn MoreIf the equivalent evaporation per pound of coal is calculated and the heating value of the coal is known, the boiler efficiency may be found directly from the chart. At the left-hand side locate the point corresponding to the equivalent evaporation and at the bottom locate the point corresponding to the heating value of the coal.

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Learn More32. Steam generated in a boiler is 36 tonnes in 3 hours. Fuel consumption in the same period is 1 tonne per hour. Continuous blow down is 8% of feed water input. The boiler evaporation ratio is ? a) 12 b) 11.7 c) 36 d) 24 33. Which of the following statement is false?

Learn MoreA boiler has a 'from and at' rating of 2 000 kg/h and operates at 15 bar g. The feedwater temperature is 68°C. The use of Equation 3.5.1 will determine a factor to produce the same result: Note: These values are all from steam tables. Using the information from Example 3.5.1 and the Equation 3.5.1 the evaporation factor can be calculated

Learn More3. A fire tube boiler operates at 200 lb/sq.in. absolute with 200 o F feedwater. The diameter of the boiler shell is 213.4 cm, length of 5.5 m and having 84 tubes, 10.2 cm inside diameter, 10.5 cm outside diameter. Determine: a. Boiler total heating surface in sq.m b. Weight of steam generated in kg/s if the boiler evaporates 34.5 lb/hr of water per 12 sq.ft. of heating surface or 3.9 g/m 2-s

Learn More250+ TOP MCQs on Evaporative Capacity and Equivalent … 2020/12/19 · One boiler is producing 1591 kg of steam per hour at 1.2 factor of evaporation and an efficiency of 65% and another boiler produced 1364 kg of steam per hour at 1.15 factor of evaporation and an efficiency of 60%. How many hrs. will the coal in the bunker run the. Read More

Learn MoreExample.-Suppose that a cylinder boiler is to be proportioned for an evaporation of 500 lbs. of water per hour, at a pressure of 75 lbs., the temperature of the feed-water being 80°. The equivalent evaporation will be 1.17 times 500, or 585 lbs., and the grate-surface 585 divided by 75, or 7-8/10 square feet.

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