During the winter season, a room is heated by central heating furnace which delivers the 750 W of heat energy by burning wood pellets. How much power can be saved if heat pump with a COP of 3 is used instead of furnace?

During the winter season, a room is heated by central heating furnace

1.	During the winter season, a room is heated by central heating furnace which delivers the 750 W of heat energy by burning wood pellets. How much power can be saved if heat pump with a COP of 3 is used instead of furnace?
A.	100 W
B.	500 W
C.	1000 W
D.	1500 W
Answer» C. 1000 W

Discussion

No Comment Found

Related MCQs

During the winter season, a room is heated by central heating furnace which delivers the 750 W of heat energy by burning wood pellets. How much power can be saved if heat pump with a COP of 3 is used instead of furnace?
A Carnot heat engine receives heat at 750 K and rejects the waste heat to the environment at 300 K. The net work output of the heat engine is used to drive a Carnot refrigerator, whose COP is 6.14. If the heat removal rate from the refrigerated space is 6.6 kW, determine the rate of heat supply to the heat engine?
The refrigerant R-22 is contained in a piston/cylinder where the volume is 11 L when the piston hits the stops. The initial state is 30 C, 150 kPa with a volume of 10 L. This system is brought indoors and warms up to 15 C. Find the work done by the R-22 during this process.
A steam turbine receives steam at 6 MPa, 800 C. It has a heat loss of 49.7 kJ/kg and an isentropic efficiency of 90%. For an exit pressure of 15 kPa and surroundings at 20 C, find the actual work.
A steam turbine inlet is at 1200 kPa, 500 C. The actual exit is at 300 kPa, 300 C with an actual work of 407 kJ/kg. What is its reversible work output if ambient temperature is at 25 C?
A piston cylinder contains 3 kg of air at 20 C and 300 kPa. It is now heated up in a constant pressure process to 600 K. Find the heat transfer.
A 250 L rigid tank contains methane at 500 K, 1500 kPa. It is now cooled down to 300 K. Find the heat transfer using ideal gas.
Air (an ideal gas) at 227 C and 500 kPa is allowed to expand to a pressure of 100 kPa in an ideal throttling process. What will be the final temperature of the expanded air?
19 mm thick fibre panels with thermal conductivity of 0.12 W/m.K are used for false ceiling of an AC room. If the floor area of the room is 17.65 m^2 and the temperature difference across the fibre panel is 15 C, calculate the heat transfer rate.
The force needed to compress a non-linear spring is given by F = 200x + 30x^2, where F is force in Newton and x is displacement of the spring in meter. Determine the work needed to compress the spring a distance of 0.6 m.

During the winter season, a room is heated by central heating furnace which delivers the 750 W of heat energy by burning wood pellets. How much power can be saved if heat pump with a COP of 3 is used instead of furnace?

Discussion

No Comment Found

Related MCQs

Reply to Comment