A closed vessel with a volume of 2 ft^3 contains 5 lb of Refrigerant 134a
A closed vessel with a volume of 2 ft^3 contains 5 lb of Refrigerant 134a. A pressure sensor in the tank wall reads 71.39 lbf/in.^2 (gage). If the atmospheric pressure is 14.4 lbf/in.^2 how do I find the temperature of the refrigerant, in deg F?
Ammonia is stored in a tank with a volume of 0.21 m^3.
Ammonia is stored in a tank with a volume of 0.21 m^3. How do I determine the mass, in kg, assuming saturated liquid at 20 deg C.
How do I determine the temperature, in K, of 5 kg of air at a pressure of 0.3 MPa and a volume of 2.2 m^3?
Air enters a 0.6 m diameter fan at 16 deg C, 101 kPa, and is discharged at 18 deg C, 105 kPa, with a volumetric flow rate of 0.35 m^3/s. Assuming ideal gas behavior, how do I determine for steady-state operation, the mass flow rate of air, in kg/s? How do I figure the volumetric flow rate at the inlet, in m^3/s and the inlet ve ...continues
At steady state, a new power cycle is claimed by its inventor to develop 6 horsepower for a heat addition rate of 400 Btu/min. If the cycle operates between reservoirs at 2400 and 1000 deg R, is the claim feasible?
How do I determine the maximum theoretical coefficient of performance for a heat pump operating at steady state between a dwelling at 70 deg F and a pond at 40 deg F? For the dwelling, if heat transfer through the walls and roof is 6.5x10^5 Btu per day, how would I determine the minimum theoretical power, in hp, to drive a he ...continues
Water is the working fluid in an ideal Rankine cycle.
Water is the working fluid in an ideal Rankine cycle. Saturated vapor enters the turbine at 18 MPa. The condenser pressure is 6 kPa. How do I determine the quality of the fluid at the turbine exit, and the heat transfer to the steam passing through the boiler in kJ per kg of steam flowing. The enthalpy of the steam entering the ...continues
At the beginning of a compression process of an air-standard Otto cycle
At the beginning of a compression process of an air-standard Otto cycle, p1 = 1 bar, T1 = 290 K, V1 = 400 cm^3. The maximum temperature in the cycle is 2200 K and the compression ratio is 8. How do I determine the mass of air contained in the system, in kg, and the heat addition, in kJ? The internal energy at the end of the isen ...continues
A flash of lightning is sighted and 3 seconds later thunder is heard.
A flash of lightning is sighted and 3 seconds later thunder is heard. Approximately how far away ws the lightning strike, in meters?
A vapor-compression heat pump system uses R-134a as the working fluid.
A vapor-compression heat pump system uses R-134a as the working fluid. The refrigerant enters the compressor at 0.24 Mpa, 0 degrees Celsius, with a volumetric flow rate of 0.6m^3/min. The compression process is adiabatic to 0.9 MPa, 60 degrees Celsius, and saturated liquid exits the condenser at 0.9 MPa. Find the following: a ...continues
