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Lab Manual for High Performance Computer Architecture - HPCA by ABHISHEK KUMAR

  • High Performance Computer Architecture - HPCA
  • Practical
  • Biju Patnaik University of Technology Rourkela Odisha - BPUT
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EXPERIMENT NO : 01 AIM OF THE EXPERIMENT: To study the constriction features of domestic refrigerator. APPARATUS REQUIRED: SL NO 01 EQUIPMENT Domestic Refrigerator SPECIFICATION QUANTITY 1 THEORY : A vapor compression refrigeration system is now days used for all purpose of refrigeration. It uses a refrigerant sealed in air tight and leak proof mechanism. The refrigerant is circulated through the system and undergoes a number of changes in its state while passing through various parts of the system. The refrigerant (R-12) absorbs heat from one place and releases it to other place. MECHANISM OF DOMESTIC REFRIGERATOR: A domestic refrigerator consists of 5 essential parts. 1. COMPRESSOR : The low pressure and temp. Vapor refrigerant from evaporator is drawn into the compressor through the inlet or suction valve, where it is compressed to a high pressure and temp..This high pressure and temp. vapour refrigerant is discharged into the condenser through the delivery valve. 2. CONDENSOR: The condenser or cooler consists of coils or pipes in which the high pressure and temp. vapor refrigerant is cooled and condensed. The refrigerant while passing through the condenser, gives up its latent heat to the surrounding condensing medium which is normally air or water. 3. RECEIVER: The condensed liquid refrigerant from the condenser is stored in a vessel is known as receiver from where it is supplied to the evaporator through the expansion valve. 4. EXPANSION VALVE: It is also called throttle valve or refrigerant control valve. The function of the expansion valve is to allow the liquid refrigerant under high pressure and low temp. to pass at a controlled rate after reducing its pressure and temp.

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5. EVAPORTAOR: An evaporator consists of coils of pipe in which the liquid vapour refrigerant at low pressure and temp. is evaporated and changed into vapor refrigerant at low pressure and temp. During evaporating the liquid vapor refrigerant absorbs its latent heat of vaporization from the medium which is used to be cooled. WORKING PRINCIPLE : The low pressure vapor in dry state drawn from the evaporator during the suction stroke of the compressor. During compression, the pressure and temp.is increased. When the high pressure refrigerant vapor enters the condenser, heat flows from condenser to cooling medium, thus allowing the vaporized refrigerant to return to the liquid state. After condensation, the liquid refrigerant is stored in the liquid receiver. Then it is passed through the expansion valve, where the pressure is reduced sufficiently to allow the vaporization of the liquid at a low temp. The low pressure refrigerant vapor after expansion enters the evaporator where heat is absorbed by it and the cycle is completed. CONCLUSION : We successfully studied about the construction features of domestic refrigerator.

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EXPERIMENT NO : 02 AIM OF THE EXPERIMENT : To determine the COP of simple vapor compression refrigeration tutorsystem. APPARATUS REQUIRED : SL NO 01 EQUIPMENT Refrigerator Tutor SPECIFICATION Vapor Compression QUANTITY 1 THEORY : The vapor compression refrigeration system is now a days used for all purpose of refrigeration. It uses a refrigerant sealed in air tight an leak proof mechanism through the system and the refrigerant is circulated through the system and under goes a number of changes in its state. While passing through various parts of the system, the refrigerant absorbs heat from one place to another. CONSTRUCTION: A simple vapor compression refrigeration system mainly consists of a compressor, condenser, receiver, expansion valve and evaporator. The compressor consists of an arrangement in which an electric motor is provided. The condenser is made in a coil shaped receipt refrigerant. A storage tank in which the liquid vapor refrigerant at a pressure is evaporated. WORKING : PROCEDURE The low pressure vapor in dry state drawn from the evaporator during the suction stroke of the compressor. During compression, the pressure and temperature is increased. When the high pressure refrigerant vapor enters intothe condenser, heat flows from condenser to cooling medium, thus allowing the vaporized refrigerant to return to the liquid state.

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After condensation, the liquid refrigerant is stored in the liquid receiver. Then it is passed through the expansion valve, where the pressure is reduced sufficiently to allow the vaporization of the liquid at a low temp. The low pressure refrigerant vapor after expansion enters the evaporator where heat is absorbed by it and the cycle is completed. TABULATION : SL NO Pressure in PSI Temperature (0C) P1 T1 P2 T2 Mass flow rate (Kg/min) T3 T4 CALCULATION : T1 ,P1 = Compressor inlet temp and pressure. T2 ,P2 = Compressor outlet temp and pressure. T3 ,P3 = Condenser outlet temp and pressure. T4 = Evaporator temperature. (𝐢𝑂𝑃)π‘Žπ‘π‘‘π‘’π‘Žπ‘™ Relative COP = (𝐢𝑂𝑃)π‘‘β„Žπ‘’π‘œπ‘Ÿπ‘–π‘‘π‘–π‘π‘Žπ‘™ (COP)actual= Q/W Q = Heat extracted in the evaporator in KJ = mwX Cpw X (T4 initial– T4 final) Where mw= Mass of water taken in the evaporator in Kg Cpw= Sp. Heat of water = 4.187 KJ/Kg K W = Work input in KJ. W can be directly found from the energy meter reading after 30 min. of running. We get the meter reading after 30 min is 0.2 Kwh = 0.2 K X J/S X 3600 Sec = KJ.

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