A 1.5-ft³rigid tank contains saturated refrigerant-134 at 170 psia. Initially, 20 percent of the volume is occupied by liquid and the rest by vapor. A valve at the top of the tank is now opened, and vapor is allowed to escape slowly from the tank. Heat is transferred to the refrigerant such that the pressure inside the tank remains constant. The valve is closed when the last drop of liquid in the tank is vaporized. Determine the total heat transfer for this process. R-134a, Sat. mixture P = 170 psia V = 1.5 ft³

compressing it isothermally. Determine the required change in pressure. 2-45 Saturated refrigerant-134a liquid at 10°C is cooled to 0°C at constant pressure. Using coefficient of volume expan- sion data, determine the change in the density of the refrigerant.

Chapter 6 7.

SOLUTION MUST BE HANDWRITTEN a.) Determine the pressure at the interface of carbon tetrachloride and syrup b.) Determine the difference in pressure between the interface of water and syrup and the interface of carbon tetrachloride and syrup c.) Compute the hydrostatic pressure (in psf) acting at the bottom of the tank d.) Apply the PANEL EQUATIONS to determine the magnitude, direction, and location of the total hydrostatic force acting at the bottom of the tank

The saturated liquid of water at T=300C has total volume (v) of 0.05m3,quality(x) of 75%,vf=1.4036×10-3m3/kg,vg=0.02167m3/kg A.find the specific volume v in m/kg of two phase mixture  B.find the mass (m) of water in kg C.find the mass(mg) of the satured  vapor in kg D.find the mass(mf) of the satured  liquid in kg

Ammonia enters the expansion valve of a refrigeration system at a pressure of 10 bar and a temperature of 20°C and exits at 2.0 bar. The refrigerant undergoes a throttling process. Determine the temperature, in °C, and the quality of the refrigerant at the exit of the expansion valve.

Steam at a pressure of 0.08 bar and a quality of 99.0% enters a shell-and-tube heat exchanger where it condenses on the outside of tubes through which cooling water flows, exiting as saturated liquid at 0.08 bar. The mass flow rate of the condensing steam is 5.8 x 105 kg/h. Cooling water enters the tubes at 15°C and exits at 35°C with negligible change in pressure. Neglecting stray heat transfer and ignoring kinetic and potential energy effects, determine the mass flow rate of the cooling water, in kg/h, for steady-state operation. mwater = i 568765.92 kg/h

Problem 4 -Flame Consulting designed an experiment where helium is extracted from a storage tank and flows through a 150 mm diameter pipe that is 90 m long. The inlet conditions for the pipe (location 1 in the diagram) are as follows: inlet temperature of 285 K; absolute pressure of 165 kPa; and inlet velocity of 125 m/sec. The consulting company determined the average friction factor in the pipe (f) is 0.004. Helium's specific heat ratio (k) is 1.667. Determine the mass flow rate through the pipe and if the pipe exit is choked (including justification). Additionally outline how Sparky could determine the friction force acting on the duct (do not solve the problem just outline the solution process). This is a compressible flow problem. Only use equations and tables from the textbook to solve this problem. Note the figures in the textbook and textbook appendices are based on air, not helium, and are not valid. Evaluate the gas constant at 20°C. It may help to create a free-body diagram,…

A rigid, well-insulated tank contains a two-phase mixture of ammonia with 0.0025 ft³ of saturated liquid and 1.5 ft³ of saturated vapor, initially at p₁ = 70 lb/in². A paddle wheel stirs the mixture until only saturated vapor at higher pressure, p2, remains in the tank. Kinetic and potential energy effects are negligible. Determine the pressure p₂, in lb/in², and the amount of energy transfer by work, in Btu. Step 1 Your answer is correct. Determine p2, in lb/in². P2 90 Hint Step 2 * Your answer is incorrect. lb/in² Determine the amount of energy transfer by work, in Btu. W12-54.94 Btu Attempts: 1 of 4 used

Problem 3 - Sparky needs helium for an experimental project. The helium is stored in a storage tank at 20°C and 300 kPa. The helium exits through a converging nozzle to the environment (100 kPa atmospheric pressure) and has 10 mm exit diameter. Determine the exit flow rate of the helium. Helium's ratio of specific heats is 1.667. This is a compressible flow problem. Only use equations and tables from the textbook to solve this problem. Note the figures in the textbook and textbook appendices are based in air, not helium, and are not valid for this problem. 1 10 mm