Question

Please solve all the problems, show all work and please do not copy from the others.

Problem 1 A 3 HP heat pump operates between 0°F and 100°F. The maximum theoretical amount of Problem 2 An ideal vapor compression refrigeration cycle with R-134a as the working fluid operates between the pressure limits of 120 kPa and 1000 kPa. The mass fraction of the refrigerant that is in the liquid phase at the inlet of the evaporator is Problem 3 An ideal vapor compression refrigeration cycle with R-134a as the working fluid. Saturated vapor enters the compressor at -10°C and saturated liquid leaves the condenser at 2 Mpa. The mass flow rate through the unit is 10 kg/min. Determine the refrigeration capacity in tons. Problem 4 The volumetric analysis of a gas mixture shows that it consists of 70% Nitrogen, 20% Carbon Dioxide, and 10% Carbon Monoxide. If the pressure and temperature of the mixture is 140 kPa and 40°C, what is the percent of carbon monoxide by mass? Problem 5 A gas turbine is supplied with an ideal gas mixture having the following gravimetric analysis: 19% Argon, 10% Helium, and 71% Neon at 500 K, and 0.3 MPa. Products exit the turbine at 350 K, and 0.11 MPa. Assuming an isentropic turbine, what is the work developed by the turbine per kilogram of gas mixture?

Answer 1

Required % 。f Carbon monoxide by mass - mco 28。 x 100- x loo 8.93 %-9%