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Q Which of the given boilers velocity of flue gases is

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  • Boiler Efficiency - an overview | ScienceDirect Topics

    The most common test used for boilers is the flue gas analysis using an Orsat apparatus to determine the percentage by volume the amount of CO 2, CO, O 2, and N 2 in the combustion gas leaving the stack. Based on the flue gas composition and temperature, some adjustments can be made to tune-up the boiler and to determine the best air-to-fuel Get Price

  • Which of the given boilers velocity of flue gases is

    Which of the given boilers velocity of flue gases is greater than velocity of sound? A) Benson boiler : B) La-Mont boiler : C) Schmidt-Hartmann boiler D) Velox boiler View Answer Explanation. Category: Mechanical Engineering MCQs Sub Category: Energy Engineering Mcqs. 10 Get Price

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  • flue gas flow rate calculation of boiler – Industrial

    Velocity of the Flue Gas - CR4 Discussion ThreadGet Price

  • CHAPTER 3 COMBUSTION CALCULATION

    Methane is burned with air in a PA Hilton boiler to produce hot water oof 55oC. The fuel is fed at a rate of 7 kg/hr at 25 C, the air enters the boiler at a rate of 130 kg/hr at 42.5oC, and the water enters the boiler at a flow rate of 1000 kg/hr at 10oC. The composition of the dry flue gas leaving the boiler at 700oC are found to be 0.9% O 2Get Price

  • Questions answers & calculation on Boiler draught & …

    Questions answers & calculation on Boiler draught & ChimneyGet Price

  • The velocity of flue gases (V) through the chimney under a

    Steam boilers, Engines, Nozzles and Turbines - Section 4 Steam Boilers, Engines, Nozzles and Turbines - Section 5 Question: The velocity of flue gases (V) through the chimney under a static draught of (H') metres is given byGet Price

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    Superheated Steam | Spirax SarcoGet Price

  • Chapter 4.1: Boiler Short type questions

    7. State two causes for rise in exit flue gas temperature in a boiler Ans. The rise in exist flue gas temperature in a boiler can be due to a. Scale deposit inside the boiler tubes b. Soot deposit on the outer surface of the boiler tube 8. Write the formula for evaluation of boiler efficiency by direct method. Ans. q GCV Q (H h)x100 Get Price

  • 10 11 Superheated steam boiler edit A superheated boiler

    10 11 Superheated steam boiler edit A superheated boiler on a steam locomotive. 10 11 superheated steam boiler edit a superheated. School Meru University College of Science and Technology (MUCST) Course Title BMED 449; Uploaded By damianomercy. Pages 11 This preview shows page 7 - 9 out of 11 pages.Get Price

  • Chapter 4.1: Boiler Short type questions

    7. State two causes for rise in exit flue gas temperature in a boiler Ans. The rise in exist flue gas temperature in a boiler can be due to a. Scale deposit inside the boiler tubes b. Soot deposit on the outer surface of the boiler tube 8. Write the formula for evaluation of boiler efficiency by direct method. Ans. q GCV Q (H h)x100 Get Price

  • Guidance Manual For Material Selection and Inspection of

    1 It is recommended that the oxygen content of the flue gas be kept as low as possible by good combustion control in ships' boilers since higher oxygen content increases the corrosion of materials in the inert gas system. 2 The oxygen content of the flue gas may increase under the following conditions.Get Price

  • Solved Questions I. The coal supplied to a boiler has the

    The air supplied is 40 per cent in excess of that required for complete combustion and coal is burned at the rate of 2000 kgjh. Assuming that the specific volume of the flue gases at entrance to the flue stack is 1.235m 3 jkg and that the maximum permissible flue gas velocity is 7.75 mjs, find the cross-sectional area of the stack entrance.Get Price

  • The velocity of flue gases (V) through the chimney under a

    The velocity of flue gases (V) through the chimney under a static draught of (H') metres is given by a) V = 2g H' b) V = 2g/H' c) V = H'/2g d) V = 2gH' Gradually increasing temperature of flue gases at inlet to chimney for given steam outputs is an indication of. A. Higher effectiveness of boiler. B. High calorific value coal being burnt.Get Price

  • Draught in Boiler - e Plant Maintenance

    Apr 16, 2019 · Boiler Draught also provides velocity to flue gases and so increases the heat transfer coefficient in the boiler. This draught is essentially required in a boiler and can be produced by a number of methods. Types of boiler Draught. Boiler draught is the pressure difference between the atmosphere and the pressure inside the boiler.Get Price

  • INJNTU

    Q) n a boiler, various heat losses take place. The biggest loss is due Dry flue gases Q)The velocity of flue gases (V) through the chimney under a static drau4t oi The velocity of steam leaving the nozzle(V) is given by--> Q)The critical pressure ratio for initially dry saturated steam is--> 0.577 Q)The critical pressure ratio for Get Price

  • 2. BOILERS - Bureau of Energy Efficiency

    2. BOILERS Bureau of Energy Efficiency 27 Syllabus Boilers: Types, Combustion in boilers, Performances evaluation, Analysis of losses, Feed water treatment, Blow down, Energy conservation opportunities. 2.1 Introduction A boiler is an enclosed vessel that provides a means for combustion heat to be transferred into water until it becomes heated water or steam.Get Price

  • HeatSponge Economizer Tutorial

    The flue gases exiting the furnace of the boiler are typically in the range of 2,000 deg F. These gases travel through the boiler transferring energy into the boiler water. As the gas temperature lowers so does the Log Mean temperature Differential (LMTD) through the unit. LMTD is another critical component of heat transfer calculation.Get Price

  • Flue Gas Dilution

    diluted flue gases necessary for a given boiler can be calculated as follows: Flow rate in l/sec = 2.69 x rated input of boiler in kW. Where 2 metres of discharge ducting is not possible then the calculation is: Flow rate in l/sec = 4.44 x rated input of boiler in kW. The volume flow rate provided by the fan will depend onGet Price

  • Q: Which of the given boilers velocity of flue gases is

    Home; Energy Engineering Anaerobic Fermentation 1; Energy Engineering Test; Question: Which of the given boilers velocity of flue gases is greater than velocity of sound?Get Price

  • superheated steam boiler – FBC Boiler Manufacturer, FBC

    Tru-Steam Boilers & Service – Boiler Manufacturer Tru-Steam Boilers & Service is an Australian based boiler manufacturer company situated in New South Wales and we also service Canberra ACT, Brisbane Superheated steam – Wikipedia, the free encyclopedia Superheated steam is a steam at a temperature higher than its vaporization (boiling Get Price

  • Change of existing circulating fluidized bed boilers to

    Dec 01, 2021 · This heat is delivered by the flue gas to the back pass because the total heat flow is equal in the furnace and back pass Q f =Q bp. Mode 2b. The fuel feed is kept constant while the internal heat extraction is reduced by removing or inactivating the heat transfer surface A h (e.g. by covering by refractory) to instead heat the additional gas Get Price

  • Boilers MCQ [Free PDF] - Objective Question Answer for

    This boiler differed from La mont boiler in the respect that combustion air is supplied at 2 - 3 bar, so that the velocity of combustion products is around sonic velocity. This increases the heat transfer coefficient on the gas side, and therefore, the overall heat flux rate to around 8 ×10 4 MJ/m 3 of combustion space.Get Price

  • Velocity of the Flue Gas - CR4 Discussion Thread

    Feb 22, 2019 · European classification for gas boilers (EN297 for B type boilers and EN483 for C type boilers) flue gas temperature in boiler | Steam Boiler Producer Flue gas – Wikipedia. Kefid · Flue gas is the gas exiting to the atmosphere via a flue, which is a pipe or channel for conveying exhaust gases from a fireplace, oven, furnace, boiler or Get Price

  • Indian Agricultural Statistics Research Institute

    The flue gases after transferring their heat in the boiler are guided by chimney to a considerable height in the atmosphere. As chimney has a large height and is the only outlet from boiler, it remains filled by hot flue gases. These exhaust gases, however have given their heat to water in the boiler, are still hotter than the boiler room air.Get Price

  • Boiler Flues - Ultimate Guide with Boiler Flue Regulations

    Nov 05, 2019 · Boiler flues are fitted when using combi, regular, and system boilers. The only exception that may apply to a small number of homeowners is a back boiler. This is a type of boiler that is fitted behind a fireplace. If you have a gas boiler behind your fire, the emissions will exit through your chimney, rather than via a boiler flue.Get Price

  • How do you calculate steam output on a boiler?

    Apr 24, 2020 · Use btu/hr (British thermal units/hour) heat input rate to calculate boiler steam flow. It takes 970.28 btu/hr to produce 1 pound of steam at the above conditions. If 50 million btu/hr are being applied to the boiler, divide by the 970.28-btu/lb to yield 51,531-lb/hr steam flow. This is an average industrial boiler.Get Price

  • ABMA paper 9 00 - Johnston Boiler

    the boiler, the flue gases make 1, 2 or 3 passes through the water stored in the pressure vessel. For a 2-pass boiler, there is only one bank of tubes, for a 3-pass boiler there are 2 tube passes and for a 4-pass boiler there are 3 tube passes. After leaving the convective section of the boiler, the flue gases exit the pressure vessel at the stack.Get Price

  • Insights into the causes and controlling strategies of gas

    Sep 01, 2021 · 1. Introduction. Tangentially fired pulverized-coal boilers are widely applied to the power generation owing to these unique merits, such as the excellent flame fullness, and the high combustion efficiency, etc.,, .However, the steam temperature deviation problem of super/re-heaters occurs in this type of boilers due to the velocity and flue gas temperature deviations, …Get Price

  • [MCQ's] Power Engineering - Last Moment Tuitions

    39. Flue gas discharge velocity through chimney of a big thermal power plant may be around _____ m/sec. a) 500 b) 0.5 c) 10 d) 50 Answer: c Explanation: The velocity of discharge of flue gases through the chimney of a big thermal power plant is around 10 m/sec. 40. In water tube boilers _____ a) forced circulation takes placeGet Price

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