Thermodynamics

posted by .

A heat pump works on the vapor compression refrigeration cycle with 0.2 kg/s of refrigerant-134a as the working fluid. The cycle is used to keep a house at 26oC while absorbing heat from the outside at 3oC. R-134a enters the compressor at 200 kPa as a saturated vapor and leaves at 900 kPa, 50oC. The refrigerant leaves the condenser as a saturated liquid. Assuming the four devices to be well-insulated:
(a) Determine the COP of the heat pump.
(b) Determine the minimum power input for this heat pump system.

Similar Questions

1. physics

A gasoline engine runs with 28 percent efficiency. It expels 3.60x10^4 J of heat in each cycle. a. Find the heat absorbed in one cycle. 128,571.4?
2. Physics (Heat Engines)

21. A heat engine operates in a cycle between temperatures 700 K and 400 K. The heat input to the engine during each cycle is 2800 J. What is the maximum possible work done by the engine in each cycle?
3. physics

Find the maximum possible coefficient of performance for a heat pump used to heat a house in a northerly climate in winter. The inside is kept at 24 degree C while the outside is -24 degree C.
4. univ. physics

A heat pump has a coefficient of performance of 4.5. If the heat pump absorbs 46.1 cal of heat from the cold outdoors in each cycle, what is the amount of heat expelled to the warm indoors?
5. physics

A heat pump has a coefficient of performance of 4.5. If the heat pump absorbs 46.1 cal of heat from the cold outdoors in each cycle, what is the amount of heat expelled to the warm indoors?
6. thermodynamics

If a carnot engine receives heat from a heat source and discharge 1000J to a heat sink at temperature of 27C in each cycle, calculate the heat received and the work performed by the engine in each cycle
7. Thermodynamics

An empty cannister of 0.002 m3 is filled with R-134a from a line flowing saturated liquid R-134a at 0°C. The filling is done quickly so it is adiabatic, but after a while in storage, the can warms up to room temperature, 20degC. Find …
8. Physics College

A heat engine operates in a Carnot cycle between 78.0°C and 340°C. It absorbs 22,000 J of energy per cycle from the hot reservoir. The duration of each cycle is 3.00 s. (a) What is the mechanical power output of this engine?
9. Heat and properties of matter

An ideal gas unergoes a cycle of processes as shown in d p-v diagram gases, which statement correctly escribe the situation a. The internal energy of the gas increases over one complete cycle b. Over the entire cycle, work is done …
10. Thermodynamics/ Energy

Determine the effects of compression ratio on the net work output and the thermal efficiency of the Otto cycle for a maximum cycle temperature of 2000 K. Take the working fluid to be air that is at 100 kPa and 300 K at the beginning …

More Similar Questions