Required information     A two-stage compression refrigeration system operates with refrigerant-134a between the pressure limits of 1.4 MPa and 0.10 MPa. The refrigerant leaves the condenser as a saturated liquid and is throttled to a flash chamber operating at 0.6 MPa. he flash chamber is maintained at the same pressure as the low pressure discharge which is 0.6 Mpa. The vapor in the flash chamber is then compressed to the condenser pressure by the high-pressure compressor, and the liquid is throttled to the evaporator pressure. Assume the refrigerant leaves the evaporator as saturated vapor and both compressors are isentropic. Consider a mass flow rate of 0.19 kg/s through the condenser. (Take the required values from saturated refrigerant-134a tables.)   Determine the rate of heat removed from the refrigerated space. (You must provide an answer before moving to the next part.)   The rate of heat removed from the refrigerated space is ______kW.

Question

Required information

 

 

A two-stage compression refrigeration system operates with refrigerant-134a between the pressure limits of 1.4 MPa and 0.10 MPa. The refrigerant leaves the condenser as a saturated liquid and is throttled to a flash chamber operating at 0.6 MPa. he flash chamber is maintained at the same pressure as the low pressure discharge which is 0.6 Mpa. The vapor in the flash chamber is then compressed to the condenser pressure by the high-pressure compressor, and the liquid is throttled to the evaporator pressure. Assume the refrigerant leaves the evaporator as saturated vapor and both compressors are isentropic. Consider a mass flow rate of 0.19 kg/s through the condenser.

(Take the required values from saturated refrigerant-134a tables.)

 

Determine the rate of heat removed from the refrigerated space. (You must provide an answer before moving to the next part.)

 

The rate of heat removed from the refrigerated space is ______kW.

Expert Answer

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.
Tagged in
Engineering
Mechanical Engineering

Thermodynamics

Related Mechanical Engineering Q&A

Find answers to questions asked by students like you.

Q: The velocity of the 8.2-kg cylinder is 0.46 m/s at a certain instant. What is its speed v after drop...

A: Write the expression of the initial kinetic energy. 

Q: A two-stage compression refrigeration system operates with refrigerant-134a between the pressure lim...

A: Show the T-s diagram for compression refrigeration cycle as in Figure (1).

Q: QUESTION 9 In a jet engine rotor the high pressure axial compressor rotates at a speed of 15000 rpm....

A:  Write the expression to calculate the polytropic efficiency of compressor.

Q: Oxygen gas is compressed in a piston-cylinder device from an initial state of 0.8 m3/kg and 20 degre...

A: Obtain the mean temperature. 

Q: The spoked wheel of radius r 625 mm is made to roll up the incline by the cord wrapped securely arou...

A: Draw the schematic diagram of the system. 

Q: Find the temperature of the following using the ideal gas law:(a) water, P=10KPa, v=30m^3/kg(b) wate...

A: According to question we have to use ideal gas law, but the parameters are given for water. we canno...

Q: Calculate the maximum velocity of slider B if the system is released from rest with x y. Motion is i...

A: Refer the given figure and apply the Pythagorean Theorem.

Q: Point A of the circular disk is at the angular position 0 0 at time t 0. The disk has angular veloci...

A: Draw the free-body diagram of the circular disk. 

Q: The slider block has the motion shown. r=140mm, h=600mm What is the wheel's angular acceleration?

A: Write the expression to obtain the velocity of point A.