The heat of combustion of coal

Assignment Help Mechanical Engineering
Reference no: EM13714391

A coal-fired power plant is producing 10,000 kW (=10 MW) of electrical power. If the plant has a thermodynamic efficiency of 28%, how many kilograms (kg) of coal are being burned per hour to maintain this output? The heat of combustion of coal is 36,000 J/g.

Reference no: EM13714391

Questions Cloud

What distance will it travel before coming to rest : A 25 kg object moving with an initial velocity of 16 m/s comes to rest due to friction after it travels a horizontal distance of 32 m. What distance will it travel before coming to rest
Design the box from a single sheet of metal : Design a box that will contain a 4 in. x 6 in. x 3 in. volume. The box should be produced from two pieces of sheet metal and require no tools or fasteners for assembly. Repeat the problem, but design the box from a single sheet of metal.
How long has the tree been dead : An 18.8438 g sample of petrified wood was found in a petrified forest. The sample showed a 14C activity of 11.2 decays/min. How long has the tree been dead
Determine the mass flow rate of air : Air enters a nozzle steadily at 50 psia, 160°F, and 155 ft/s and leaves at 14.7 psia and 900 ft/s. The heat transfer from the nozzle to surrounding air is estimated to be 6.0 Btu/lb of air flowing. The inlet area of the nozzle is 0.15 ft2. Based on ..
The heat of combustion of coal : A coal-fired power plant is producing 10,000 kW (=10 MW) of electrical power. If the plant has a thermodynamic efficiency of 28%, how many kilograms (kg) of coal are being burned per hour to maintain this output? The heat of combustion of coal is 36,..
A heat engine operates between reservoirs : A heat engine operates between reservoirs at 1000 and 300 K. Some of the power output from the heat engine drives a refrigerator which operates between 250 and 300 K. The heat-transfer input at 1000 K to the heat engine is 1000 kJ, and the heat trans..
Coal-fired power plant is producing : A coal-fired power plant is producing 10,000 kW (=10 MW) of electrical power. If the plant has a thermodynamic efficiency of 28%, how many kilograms (kg) of coal are being burned per hour to maintain this output? The heat of combustion of coal is 36,..
Cable drum for a crane is to rotate : A cable drum for a crane is to rotate between 160 and 166 rpm. Design a gear drive for 25 hp in which the input pinion rotates at 925 rpm and the output rotates with the drum. The crane is expected to operate with a 50% duty cycle for 120 hours per w..
Determine the minimum power requirement for the pump : The impeller of a centrifugal pump has inner and outer diameters of 14 and 37cm, respectively, and a flow rate of 0.18m3/s at a rotational speed of 1200rpm. The blade width of the impeller is 8.6cm at the inlet and 3.5cm at the outlet.

Reviews

Write a Review

Mechanical Engineering Questions & Answers

  Determine volume and height of cooling tower-effectiveness

A counter flow cooling tower cools 2000 gal/min water from 104 F to 85 F with 210,000 ft^3/min of air at 90 F Dry bulb Temperature and 76 F WBT . The Mass transfer coefficient -surface area product is hA= 123lbm/hr ft^3. Air mass flow rate per unit c..

  A supply of 5 kgs ammonia at 500 kpa 20degc is needed two

a supply of 5 kgs ammonia at 500 kpa 20degc is needed. two sources are available one is saturated liquid at 20degc and

  A rigid insulated vessel is divided into two compartments

a rigid insulated vessel is divided into two compartments connected by a valve. initially one compartment occupying

  Find the factor of safety to ensure infinite life using the

a cold drawn rectangular steel bar 60 x 10 mm with a hole of diameter 12mm is subject to a flctuating tensile load from

  Two blocks a and b are connected by a cord passing over two

two blocks a and b are connected by a cord passing over two pulleys c and d and e and f. at t 0 block a starts moving

  If the temperature and pressure of the steam at the nozzle

steam is accelerated by a nozzle from a low velocity to a velocity of 280 ms at a rate of 2.5 kgs. if the temperature

  During this process the pressure inside the tank remains

consider a rigid tank of volume 15 m3 . this tank is connected to a steam supply line. the tank is initially evacuated.

  Consider a large vessel divided into two chambers by a

consider a large vessel divided into two chambers by a dividing nwall such as that described in lecture on 23 feb. the

  A heat engine accepts 200000 btu of heat from a source at

a heat engine accepts 200000 btu of heat from a source at 1500 r and rejects 100000 btu of heat to a sink at 600 r.

  Draw a schematic and indicate your choice of system what is

an ideal gas cp5.1926 kjkgk cv3.1156 kjkgk is placed in a piston-cylinder apparatus. the mass of helium is 5kg and the

  If the barometric pressure was 100 kpa and the humidity was

temperature in state college pa on 31st december 2012 was 22 f. if the barometric pressure was 100 kpa and the humidity

  Fuel energy problem

"Fuel energy" is available at 2000 F at a local power plant. What is the maximum work that can be produced for each BTU of fuel energy if it is winter and the surroundings are at 40 ¯F ? If this work is used to maintain a residence at 80 F, how much ..

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd