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Steam is extracted from the turbine at 0.4 MPa to heat the feedwater in an open feedwater heater. Water leaves the feedwater heater as a saturated liquid. Show the cycle on a T-s diagram and determine (a) the net work per kilogram of steam flowing through the boiler and (b) the thermal efficiency of the cycle.

Get priceA 5000 TCD sugar mill in Tamilnadu operating for about 200 days a year had the following equipments: Boilers – 2 numbers of 18 TPH, 12 ATA 2 numbers of 29 TPH, 15 ATA 1 number of 50 TPH, 15 ATA Turbines-1 number 2.5 MW 1 number 2.0 MW 1 number 1.5 MW Mill drives – 6 numbers 750 BHP steam turbines

Get priceA boiler generates 5000kg of steam per hour at 2Mpa the steam temperature is 325'c and the feed water temperature is 50'c. The efficiency of the boiler is 80% when using oil of Higher Heating Value 45500kJ/kg. The steam generated is supplied to a turbine which develops 500kW and exhausts at 0.2Mpa, the quality of the steam being 0.98.

Get priceIn the following equations, the operating cost of the boiler is CO per hour and the process requires S pounds/hour (lb/h) of steam. To deliver this much steam, it is necessary to actually generate (1+X)S lb/h of steam, where X is a factor typically ranging from 5 to 20%. So we already have two distinct equations to determine the cost of steam

Get priceThe Torripac boiler has been designed as easily transportable modules that are simply assembled with limited on-site welding. The Torripac is fully compatible with our standard range of ancillary equipment. Steam Output. Steam output from the Torripac boiler range is …

Get priceGaseous propane of 88 kg/hr is burned in a boiler with 10% excess air to produce 1200 kg/hr of steam at 0.1 MPa and 150oC. The percent conversion of the propane is ; of the fuel burned, 90% reacts to form CO2 and the balance to form CO. The temperature of combustion air, fuel and water entering the boiler is assumed at 25oC.

Get priceorated to steam per hour. Maximum continuous rating is the hourly evaporation that can be maintained for 24 hours. F & A means the amount of steam generated from water at 100 °C to saturated steam at 100 °C. Indian Boiler Regulation The Indian Boilers Act was enacted to consolidate and amend the law relating to steam boilers.

Get priceBased on the Boiler efficiency, this heat energy from the fuel can be utilized (boiler heat rate formula); generally, fuel heat utilization exists in the range of 60 - 90%. This heat that is generated in the boilers because of fuel oxidation is used to generate high-pressure Et temperature steam.

Get price15. In a plant a boiler is generating a saturated steam of 2 tonnes/hour at a pressure of 7.0 kg/cm2g. The feed water temperature is 70 °C and furnace oil consumption is 138 kg/h. What is the efficiency of the boiler by using direct method of efficiency evaluation? (calorific value of FO is 10,000 kCal/kg, enthalpy of steam is 660 kCal/kg.

Get priceSaturated vapor enters the turbine at 6.9 MPa. The condenser pressure is 6.9 kPa. Determine (a) the net work per unit mass of steam flow in kJ/kg, (b) the heat transfer to the steam passing through the boiler in kJ/kg, (c) the thermal efficiency …

Get priceBoiler horsepower - a power unit from the 19 th-20 th centuries - was used to rate the capacity of a boiler to deliver steam to steam engines.. A common definition of one boiler horsepower is the amount of energy required to produce 34.5 pounds (15.65 kg) of steam per hour at pressure and temperature 0 psig (0 bar) and 212 o F (100 o C) - with feed water at pressure 0 psig and …

Get priceCompleted inspection form for building envelope. 2.2.5.2 The steam boiler and steam distribution system. A steam boiler burns fuel to produce heat that converts water into steam, and the steam distribution system takes the steam from the boiler to The Energy Audit Process: An Overview 75 the point of use. Boilers consume much of the fuel used

Get priceThen the steady-flow energy equation per unit mass of steam reduces to (qin - qout) + (w in - wout) = he- hi (kJ/kg) The boiler and the condenser do not involve (10-1) any work, and the pump and the turbine are assumed to be isentropic . Then the conservation of energy relation for each device can be expressed as follows

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 priceBoiler Horsepower What is the boiler horsepower of a boiler generating 21,500 lbs of steam per hour at 155 psi? The factor of evaporation is 1.08.

Get pricea cogeneration plant. The boiler generates steam at 1000 psia and 1000°F at a rate of 5 lbm/s, and the condenser pressure is 2 psia. Steam leaves the process heater as a saturated liquid. It is then mixed with the feedwater at the same pressure …

Get priceEvaporation ratio means kilogram of steam generated per kilogram of fuel consumed. Typical Examples: Coal fired boiler : 6 Oil fired boiler : 13 1 kg of coal can generate 6 kg of steam 1 kg of oil can generate 13 kg of steam However, this figure will depend upon type of boiler, calorific value of the fuel and associated efficiencies.

Get priceJan 05, 2018 · Modifying an existing coal-fired boiler to natural gas firing capability, either to replace or to supplement coal as the primary fuel source, is an extensive – and expensive – project. Although each project is different, the scope of the conversion will ultimately determine the installation costs. Capital costs can be offset by several factors.

Get priceA 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) hg = enthalpy steam (Btu/lb, kJ/kg) hf = enthalpy condensate (Btu/lb, kJ/kg) m = steam evaporated (lb/h, kg/s)

Get priceSteam cost/1000 Kgs. Max Gas burning rate cu m/hr. Steam cost/1000 Kgs. Max Oil burning rate lts/hr. $11.38/1000 lbs of steam. 157.14 Gal/hr.

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Get priceHEAT AND MASS TRANSFER Solved Problems By Mr. P. Raveendiran Asst. Professor, Mechanical f Heat and mass Transfer Unit I November 2008 1. Calculate the rate of heat loss through the vertical walls of a boiler furnace of size 4 m by 3 m by 3 m high. The walls are constructed from an inner fire brick wall 25 cm thick of thermal conductivity 0.4 W

Get priceExample - Boiler Horsepower to lbs of Steam Conversion. 200 hp x 34.5 = 6900 lbs of steam per hour. Lbs of steam can be converted to hp by dividing lbs steam per hour by 34.5. Example - Lbs of Steam to Boiler Horsepower Conversion. 5000 lbs of steam / 34.5 = 145 hp boiler. Converting Boiler Horse Power (BHP) to kBtu/hr

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Get priceNov 03, 2006 · What is the boiler horsepower of a boiler generating 21,500 lbs of steam per hour at 155 psi? The factor of evaporation is 1.08. BHP = (LB/HR*fe)/34.5 BHP = (LB/HR*fe)/34.5 BHP = 21500 * 1.08 / 34.5 BHP = 673 Where, BHP boiler horsepower Lb/Hr pounds per hour Fe factor of evaporation (can be assumed to be equal to 1)

Get priceorated to steam per hour. Maximum continuous rating is the hourly evaporation that can be maintained for 24 hours. F & A means the amount of steam generated from water at 100 °C to saturated steam at 100 °C. Indian Boiler Regulation The Indian Boilers Act was enacted to consolidate and amend the law relating to steam boilers.

Get price(d) 5000-8000 kcal/kg (e) 8000-10,000 kcal/kg. Ans: c. 178. Evaporative capacity of boiler is expressed as (a) kg of steam produced (b) steam pressure produced (c) kg of fuel fired (d) kg of steam produced per kg of fuel fifed (e) kg of water evaporated. Ans: d. 179. Boiler parameters are expressed by (a) tonnes/hr. of steam (b) pressure of

Get priceMar 17, 2015 · Step 1: Determine Properties of Steam Produced Using the Steam Property Calculator, properties are determined using Steam Pressure and the selected second parameter (Temperature, Specific Enthalpy, Specific Entropy, or Quality). The Specific Enthalpy is then multiplied by the Mass Flow to get the Energy Flow: Pressure = 654.0 psig; Temperature = …

Get priceThe vapor exits the boiler in state 1 and the cycle is repeated. Example 7.1-12. ----- Steam enters the turbine in a power plant at 600oC and 10 MPa and is condensed at a pressure of 0.1 MPa. Assume the plant can be treated as an ideal Rankine cycle. Determine the power produced per kg of steam and the efficiency of the cycle.

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