EXPERIMENT NO. 1 Performance Test of a Mini Ice Plant (Pull Down Test DOCX

Title	EXPERIMENT NO. 1 Performance Test of a Mini Ice Plant (Pull Down Test
Author	Rene Louis Santos
Pages	9
File Size	74.7 KB
File Type	DOCX
Total Downloads	117
Total Views	189

Summary

ICE PLANT TEST RIG EXPERIMENT NO. 1 Performance Test of a Mini Ice Plant (Pull Down Test) I. OBJECTIVES:  To carry out actual ice formation test  To calculate the actual C.O.P of the system.  To calculate the theoretical C.O.P of the cycle. II. INTRODUCTION: Refrigeration is the process of removi...

Description

ICE PLANT TEST RIG EXPERIMENT NO. 1 Performance Test of a Mini Ice Plant (Pull Down Test) I. OBJECTIVES: To carry out actual ice formation test To calculate the actual C.O.P of the system. To calculate the theoretical C.O.P of the cycle. II. INTRODUCTION: Refrigeration is the process of removing heat from where it is not wanted. Heat is removed from food to preserve its quantity and flavour. It is removed from room air to establish human comfort. Therefore, as heat is removed, a space or material becomes colder. The more heat is removed, the colder it becomes. The Ice Plant Test Rig designed by us works on simple vapour compression refrigeration cycle and uses R134a or R 404 A as a refrigerant. The system is designed such that students can observe and study ice formation process without any confusion. It is also useful to understand working of vapour compression system, due to its sophisticated yet simple performance and controls. (http://www.testrig.in/ice-plant-test-rig.htm) The first procedure of ice making is Pull down test. This process would enable to lessen the time of actual ice formation. The pull down test is done with the cooling of the secondary refrigerant in the tank, brine, lowering its temperature to at least -4 to -5 degrees Celsius. There are still different factors considered in the Pull down test and this procedure has its independent cooling load calculation. III. PROCEDURE: 1. Put the machine in the proper position where its level is horizontal and it is well ventilated. The machine must have at least 1.5 meters clearances from all sides. 2. Give 230 volts, 50Hz, and 1 phase supply to the unit. 3. Fill tank with brine solution of propylene glycol with approx. 20% and mix it thoroughly with water in tank (supplied). 4. Start the compressor by putting the switch ON. 5. Check suction and discharge pressures, check the energy-meter reading. 6. Allow the unit to run until the temperature of the brine reaches -4 to -5 C. 7. Record all data tie for every change in value as appropriate and the corresponding pressure reading. 8. Using the available table for R134a, take the corresponding enthalpy for every increase in pressure. Interpolate as possible. 9. Calculate the coefficient of perforiance (COP). 10. Make a graph between the tie and COP....