Question: (12 points) A refrigerator using refrigerant-134a as the working fluid operates on the vapor compression cycle. The cycle operates between 200 kPa and 1.2 MPa.

(12 points) A refrigerator using refrigerant-134a as the working fluid operates on the vapor compression cycle. The cycle operates between 200 kPa and 1.2 MPa. The refrigerant flows through the cycle at a rate of 0.023 kg/s. The (actual) refrigerator has a compressor with an isentropic efficiency of 90%. The refrigerant enters the compressor slightly superheated by 4.8 C (hint: add this to the saturation temperature). The refrigerant leaves the condenser slightly subcooled by 1.9 C.

What is the rate of heat removal from the refrigerated space for the actual refrigerator? (kW)

What is the power supplied to the compressor for the actual refrigerator? (kW)

What is the COP for the actual refrigerator?

Under the ideal vapor compression cycle, for a refrigerator operating between these pressures and with the given refrigerant flow rate, what is:

the rate of heat removal? (kW)

the power supplied to the compressor? (kW)

the COP?

(Hint: remember for an ideal cycle the evaporator does not superheat the refrigerant and the condenser does not subcool it either.)

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Chemical Engineering Questions!

Lundell Enterprises is an all-equity funded firm that operates in two businesses publishing and entertainment in two countries the United States and Mexico. The breakdown of revenues (in millions...

12. A refrigerator uses refrigerant-134a as the working fluid and operates on a mechanical vapor-compression cycle between evaporator pressure of 0.14 MPa and condenser pressure of 0.8 MPa. At the...

1) (Total: 23 marks) A refrigerator uses refrigerant-134a as the working fluid and operates on an actual vapor- compression refrigeration cycle. The refrigerant enters the compressor at -10.0 C and...

2. A commercial refrigerator with refrigerant-134a as the working fluid enters the condenser of a vapor compression refrigeration cycle at 800 kPa and 55C at a rate of 0.018 kg/s and leaves at 750...

Problem 2 ( 2 5 points ) A commercial refrigerator with refrigerant - 1 3 4 a as the working fluid is used to keep the refrigerated space at 3 0 C by rejecting its waste heat to cooling water that...

A refrigerator uses refrigerant-134a as the working fluid and operates on an ideal vapor- compression refrigeration cycle between 0.12 and 0.7 MPa. The mass flow rate of the refrigerant is 0.05 kg/s....

(1) A chiller plant uses Refrigerant-134a as the working fluid and operates on the vapor- compression refrigeration cycle between and evaporating pressure of 0.3 MPa and a condensing temperature of...

Consider a 5 kW refrigeration system that operates on an ideal vapor-compression cycle with R-134a as the working fluid. The refrigerant enters the compressor as a saturated vapor at 200.74 kPa and...

A refrigerator uses R-134a as the working fluid and operates on an ideal vapor compression refrigeration cycle between 0.15 MPa and 1 MPa. A temperature difference of 5C is maintained for effective...

In an actual refrigeration cycle using R-12 as the working fluid, the refrigerant flow rate is 0.05 kg/s. Vapor enters the compressor at 150 kPa, 10C, and leaves at 1.2 MPa,...

In an actual refrigeration cycle using R-12 as the working fluid, the refrigerant flow rate is 0.05 kg/s. Vapor enters the compressor at 150 kPa, 10C, and leaves at 1.2 MPa, 75C. The power input to...

A company produces three types of skis: regular model, trick ski, and slalom ski. They need to fill a customer order of 110 pairs of skis. There are two major production divisions within the company:...

the diode pass the current in both directions* true False in the connected circuit in the figure,the value of the current passing through the silicon diode is* 120A 47v 0.021MA O 0.021A 0.00021A...

A premature withdrawal from an IRA may be subject to a tax penalty. What is the age considered "premature"?

Suppose that you are considering the present value of 3 year investment project at work. The net cash flow of your 3 year project is as follows. In the first year, you will need to pay an upfront...

5. Critically evaluate and explain each statement: LO12.5 a. Because they can control product price, monopolists are always assured of profitable production by simply charging the highest price...

7. The main problem with imposing the socially optimal price (P = MC) on a monopoly is that the socially optimal price: LO12.7 a. May be so low that the regulated monopoly cant break even. b. May...

2. The MR curve of a perfectly competitive firm is horizontal. The MR curve of a monopoly firm is: LO12.3 a. Horizontal, too. c. Downsloping. b. Upsloping. d. It depends.