Determine the rate that energy is removed from the room air

Assignment Help Mechanical Engineering
Reference no: EM13707410

A window-mounted room air conditioner removes energy by heat transfer from a room and rejects energy by heat transfer to the outside air. For steady -state operation, the air conditioner cycle requires a power input of 0.434kw and has a coefficient of performance of 6.22.

a) Determine the rate that energy is removed from the room air, in kW.

b) If electricity is valued at $0.1/kW*h , determine the cost of operation for 24 hours of operation.

Reference no: EM13707410

Questions Cloud

Design a hohmann transfer to take a satellite from a parking : Design a Hohmann transfer to take a satellite from a parking orbit 200 km by 400 km to a circular orbit with a period of 4 hours. Show all calculations
Alloy specimen is under a tensile stress test : A cylindrical S-950 alloy specimen is under a tensile stress test. The specimen is 975 mm long. If the tensile stress is 300 Mpa and temperature is at 730C. What is the total elongation after 4 hour steady state operation? Assume the total of both in..
Calculate the velocity of satellite in orbit around earth : Calculate the velocity of a satellite in orbit around the Earth in a Geosynchronous orbit. Use the definition of a sidereal day, which is 86164.09 seconds. What is the orbit height in km. Show the calculations
Mixture is heated and expands at constant pressure : A piston-cylinder assembly contains a two-phase liquid-vapor mixture of H2O at 160 lbf/in.2 with a quality of 70%. The mixture is heated and expands at constant pressure until a final temperature of 480oF is reached. Determine the work for the proces..
Determine the rate that energy is removed from the room air : A window-mounted room air conditioner removes energy by heat transfer from a room and rejects energy by heat transfer to the outside air. For steady -state operation, the air conditioner cycle requires a power input of 0.434kw and has a coefficient o..
Large manufacturing plant uses a certain brand of light bulb : A large manufacturing plant uses a certain brand of light bulbs that has a mean time to failure (MTTF) of 3600 hours with a standard deviation of 160 hours. Good lighting in the plant is critical to safety, and the plant manager determines that no mo..
Determine the heat loss or gain during this process : A piston-cylinder device contains helium gas initially at 145 kPa, 20 degrees C, and 0.5 m^3. The helium is now compressed in a polytropic process (PV^n = constant) to 400 kPa and 140 degrees C. Determine the heat loss or gain during this process.
Determine the final pressure of the gas : Helium gas is contained in a rigid vessel of 0.5 m3 at 500 kPa. The gas is agitated violently by a stirrer that transfers 250 kJ of work to the gas. Assuming that the system undergoes an adiabatic process, determine the final pressure of the gas. Ass..
What is the pressure inside the tire : The pressure in a tire depends on the temperature of the air in the tire. The gage pressure of an automobile tire with a volume of 0.025 m3 is measured to be 210 kPa at 25 oC at sea level on a day with calm weather. If the temperature of the air in t..

Reviews

Write a Review

 

Mechanical Engineering Questions & Answers

  If 002 kg leaks out and the temperature drops to 27oc find

carbon monoxide is initially in a 50 l tank at 210 kpa and 127c.a determine the mass of the gas in kilograms.b if 0.02

  Designing optimum straight-line fourbar linkages

For an assembly line, you need to design a linkage that moves a point P in approximately a straight line over a distance of 24” in one second. It is also specified that P must return from the endpoint back to the starting point in five seconds, givin..

  Determine a the rate of steam production b the rate of

hot exhaust gases leaving an internal combustion engine at 400oc and 150 kpa at a rate of 0.8 kgs is to be used to

  A robot is on the surface of mars the angle of the

a robot is on the surface of mars. the angle of the depression from a camera in the robot to a rock on the surface of

  The collector transfers heat by natural convection to the

a flat plate solar collector 6ft by 12ft is mounted on the roof of a house. the outer surface of the collector is at

  Flows down an angled plate due to the influence of gravity

A thin film of constant thickness, h, flows down an angled plate due to the influence of gravity. Using mue? for the viscosity and reo? for the density of the fluid, find the velocity profile u(y) following the coordinates below. Clearly state all as..

  Calculate the effort required to lift the load

This crate holding 40 bricks, each of mass 1.3kg, is placed on a hydraulic lifting beam as shown. State the order of the lever used here. Calculate the effort required to lift the load. Calculate the mechanical advantage for this system.

  The heater surface is exposed to air that is also at

a cartridge electrical heater is shaped as a cylinder of length l 200 mm and outer diameter d 20 mm. under normal

  Compute the placement of the last intermediate anneal so

copper is being reduced from a hot rolled 38 in diameter rod to a final diameter of .1 in. by wire drawing through a

  The pressure in an automobile tire depends on the

the pressure in an automobile tire depends on the temperature of the air in the tire. when the air temperature is 25

  Determine the power needed to drive the low speed turbine

determine the power needed to drive the low speed turbine given maximum velocity in the test section 140 mih with 12 x

  Determine the internal energy change of air in a rigid

determine the internal energy change of air in a rigid container as its temperature is increased by transferring

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