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Dec 17, 2017 · What should be the pump work in kJ/kg. 27.13 b. 29.87 c. 32.47 d. 33.25 Sol. Wp = vf(P4-P3)/n; vf = 1000 m3/kg BP2-97 Steam enters the superheater of a boiler at a pressure of 25 bar and dryness of 0.98 and leaves at the same pressure at a temperature of 370oC. Calculate the heat energy supplied per kg of steam supplied in the superheater.
Get priceMar 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.
Get priceJan 15, 2019 · What is boiler? It is an enclosed pressure vessel in which water is converted into steam by gaining heat from any source (coal, oil, gas etc). Boiler in thermal power plant accumulates the steam and build up a pressure to expend it in turbine and convert thermal energy to mechanical energy. The generator which is connected to turbine converts the mechanical …
Get priceMay 12, 2020 · Cp = Mean specific heat of superheated steam in exhaust gases, tf = Temperature of flue gases leaving chimney, tb = Temperature of the boiler room, and; hb = Sensible heat of water at boiler room temperature. 3. Heat lost to steam formed by combustion of hydrogen/kg of fuel. Let. H2 = weight of hydrogen present per kg of fuel.
Get priceSince the amount of steam delivered varies with temperature and pressure, a common expression of the boiler capacity is the heat transferred over time expressed as British Thermal Units per hour. A boilers capacity is usually expressed as kBtu/hour (1000 Btu/hour) and can be calculated as. W = (hg - hf) m (1) where. W = boiler capacity (Btu/h, kW)
Get priceoperating at an average steam load of 38,500 pounds per hour (lb/hr) with one watertube boiler supplying . steam and another on standby, the operating pressure at the boiler was reduced from 130 psig to 80 psig. The average fuel input to the boiler plant before steam pressure reduction is 49.3 million British thermal units per hour (MMBtu/hr).
Get priceThe Sioux Steam-Flo® Low-Pressure industrial steam generator is a perfect source of low-pressure steam for a variety of commercial and industrial applications. This unit can be used in place of a conventional boiler for low-pressure applications. These industrial steam generators produce 370-3,450 lbs. (168-1,564 kg) per hour of saturated
Get priceSolutions for Chapter 8 Problem 15P: Saturated steam is generated in a boiler by converting a saturated liquid to a saturated vapor at 200 psia. This is done by transferring heat from the combustion gases, which are at 500°F, to the water in the boiler tubes. Calculate the wasted work potential associated with this heat transfer process.
Get priceEngineering Thermodynamics: Problems and Solutions, Chapter-9
Get priceA boiler used to generate saturated steam is in the form of an unfinned cross-flow heat exchanger, where water flows through the tubes at a rate of 3 kg/s and a high temperature gas flows over the tubes at a rate of 10 kg/s. The gas has a specific heat of c_p = 1120 J/kg.K and enters the heat exchanger at 1400 K.
Get priceA steam power plant operates on a simple ideal Rankine cycle between the specified pressure limits. The the total rate of heat input in the boiler, and the thermal efficiency of the cycle are to be determined. Assumptions 1 Steady operating conditions exist.
Get price11.23 A steam power plant operates with a boiler output of 20 kg/s steam at 2 MPa, 600°C. The condenser operates at 50°C dumping energy to a river that has an average temperature of 20°C. There is one open feedwater heater with extraction from the turbine at 600 kPa and its exit is saturated liquid. Find the mass flow rate of the extraction
Get priceMar 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.
Get priceApr 18, 2018 · Transcribed image text: 1.64 A boiler used to generate saturated steam is in the form of an unfinned, cross-flow heat exchanger, with water flowing through the tubes and a high-temperature gas in cross flow over the tubes. The gas, which has a specific heat of 1120 J/kg K and a mass flow rate of 10 kg/s, enters the heat exchanger at 1400 K. The water, which has a …
Get priceSolved: Saturated steam is generated in a boiler by
Get priceDec 19, 2020 · 379. A water tube boiler has a capacity of 1000 kg/hr of steam. The factor of evaporation is 1.3, boiler rating is 200%, boiler efficiency is 65% and heating surface area is 0.91 m 2 per bo.Hp. and the heating value of fuel is 18,400 kCal/kg. The total coal available in the bunker is 50,000 kg.
Get priceDec 24, 2020 · 432. A boiler plant generates 225,000 lb. of steam and burns 13.9 tons of coal per hour. The coal has a heating value of 11,400 Btu/lb. A test of the particulates leaving the boiler shows that 3804 lb. of particulate is being discharged per hour. What is the particulate discharged per million Btu heat input to the furnace? A. 12 lb/10 6 Btu. B
Get pricethe boiler, steam loop, and controls. Non-fuel O&M costs range . from 0.6 to 1.0 ¢/kWh for the three steam turbines shown in Table 3. Similar to capital costs, there are economies of scale, and the O&M costs decline on a per kWh basis as the steam turbine capacity increases. The O&M costs shown in Table 3 are for the steam turbine/generator
Get priceExample 11.4 A coal fired boiler consumes 400 kg of coal per hour. The boiler evaporates 3200 kg of water at 44.5 o C into superheated steam at a pressure of 12 bar and 274.5 o C. If the calorific value of the fuel is 32760 kJ/kg, determine (a) equivalent evaporation "from and at 100 o C"; (b) the thermal efficiency of the boiler.
Get priceDec 14, 2020 · 69. 23.5 kg of steam per second at 5 MPa and 400°C is produced by a steam generator. The feedwater enters the economizer at 145°C and leaves at 205°C. The steam leaves the boiler drum with a quality of 98%. The unit consumes 3 kg of coal per second as received having value of 25,102 kJ/kg.
Get priceoperating at an average steam load of 38,500 pounds per hour (lb/hr) with one watertube boiler supplying . steam and another on standby, the operating pressure at the boiler was reduced from 130 psig to 80 psig. The average fuel input to the boiler plant before steam pressure reduction is 49.3 million British thermal units per hour (MMBtu/hr).
Get priceThe Sioux Steam-Flo® Low-Pressure industrial steam generator is a perfect source of low-pressure steam for a variety of commercial and industrial applications. This unit can be used in place of a conventional boiler for low-pressure applications. These industrial steam generators produce 370-3,450 lbs. (168-1,564 kg) per hour of saturated
Get priceFor a boiler is operating at a pressure of 8 kg/cm2, steam saturation temperature is 170 oC, and steam enthalpy or total heat of dry saturated steam is given by: h f +h fg = 171.35 +489.46 = 660.81 kCal/kg. If the same steam contains 4% moisture, the total heat of steam is given by: 171.35+ 0.96 x 489.46 = 641.23 kCal/kg Ch-03.qxd 2/23/2005 11
Get priceThe units of specific entropy are J/kg K. 1.2. ISENTROPIC PROCESS ISENTROPIC means constant entropy. Usually (but not always) this means a process with with a steam turbine and generator and the process steam is obtained in two ways as The boiler produces 8 kg/s of steam at 40 bar and 500oC. This is expanded to 2 bar with an isentropic
Get priceMar 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.
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