Q21. What is the effect of increase the condensing pressure on the VCRC with keep the evaporator pressure constant?2. What are the different between the ideal and actual VCRC for the compressor only?3. Draw the relation between the evaporator temperature and the volumetric efficiency and mass flow rate for the idealcompressor working with R-22, 4.5 %clearance, 50 l/s rate of displacement, and 35 °C condensing temperature?4. What are the main classifications of the heat exchangers?5. Define the HRR? Why it is different between the closed and open type compressor?

Given data What is the effect of increase the condensing pressure on the VCRC with keep the…

Answered: . What is the effect of increase the…

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter9: Heat Transfer With Phase Change

Section: Chapter Questions

Problem 9.27P

See similar textbooks

Similar questions

اريد حل كتابة يد
Determine the total power required for individual compressors for evaporator loads of 20 tons at 24ᵒF, 30 tons at 34ᵒF and 10 tons at 44ᵒF for an ammonia vapor compression system. Condensing temperature is 104 ᵒF. Two flash tank intercooler were used.
Please answer ASAP. I will rate helpful thank you.
A two-stage R-22 system uses flash-gas remoal and intercooling as in the previous problem. The evaporating temperature is -40 C and the condensing temperature is 30 C. The pumping capacity of the high and low stage compressors is shown below: (from picture solve a and b)
3.) An ammonia compressor operates at evaporator pressure of 316.02 kPa and a condenser pressure of 1557 kPa. A twin-cylinder compressor with bore to stroke ratio of 0.85 is to used at 1200 rpm. The actual volumetric efficiency is 92% and compression and mechanical efficiency is 78% and 80% respectively. For a cooling capacity of 25 TR, (a) the sketch the p-h diagram labeling the evaporating and condensing temperature and pressures (b) define the all properties of ammonia taken from saturation table. Determine (c) the quantity of cooling water in the condenser in kg/min if the increase in temperature is 8°C, (d) the bore and stroke expressed in cm and (e) the size of the driving motor in hp. Given: h2 = h at 1557 kPa and s2 = s1 1695 kJ/kg
Answer with solution
Refrigerant 12 Condensing temperature = 46.2 oCEvaporating temperature = -3 oCTemperature of the suction vapor = -15.6oCRefrigerating Capacity for evaporator = 44 TONDetermine the COP
9. A vapour compression plant is powered by a 2kW motor and circulates R12 at 5kg/min. The R12 leaves the condenser at its saturation temperature with a specific enthalpy of 74.59kJ/kg and leaves the evaporated dry saturated with a specific enthalpy of 187.53kJ/kg. Calculate: (a). the dryness fraction at the evaporator inlet (b). refrigeration effect (c). coefficient of performance
derive the general formula for the intercooling related to the number of stage of compressor
an ammonia system supplies chilled brine for a 10 ton load at 0F, a 2 ton load at 20F, and 4 ton load at 35F and must operate at a -10F, suction temperature. Compare the theoretical power requirements with that for three separate F-12 compressors using direct expansion. Condesing os 80 F with 10F sub-cooling, saturared vapour enters the compressor.
A refrigerant 22 , four-cylinder, 85 mm x 70 mm compressor operating at 28 rev/sec, condensing temp of 38OC and an evaporating temp of-2OC carries a refrigerating load of 112 kW. The motor driving the compressor has an efficiency of 92% and draws 32.5 kW. There is a 5OC subcooling and 7OC superheating of the suction gas entering the compressor. Compute (a) the actual volumetric efficiency (b) the compression efficiency.
Given that the temperatures of the generator, condenser, absorber and evaporator of a VARS system are 94, 44, 25, and 10/°C), respectively, then COPmax?. If the how rate of the reftigerant is 0.09 [kg/s), then, the flow rates of the strong and weak solutions are?

SEE MORE QUESTIONS

Recommended textbooks for you

Principles of Heat Transfer (Activate Learning wi…

Mechanical Engineering

ISBN:

9781305387102

Author:

Kreith, Frank; Manglik, Raj M.

Publisher:

Cengage Learning

Refrigeration and Air Conditioning Technology (Mi…

Mechanical Engineering

ISBN:

9781305578296

Author:

John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:

Cengage Learning

Principles of Heat Transfer (Activate Learning wi…

Mechanical Engineering

ISBN:

9781305387102

Author:

Kreith, Frank; Manglik, Raj M.

Publisher:

Cengage Learning

Refrigeration and Air Conditioning Technology (Mi…

Mechanical Engineering

ISBN:

9781305578296

Author:

John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:

Cengage Learning

SEE MORE TEXTBOOKS