SLIDE TRAINING - LIQUID REFRIGERANT PUMPING

THE QUANITY OF HEAT REQUIRED TO CHANGE THE TEMPERATURE OF ONE POUND OF WATER ONE DEGREE BTU ADDED TO LB OF WATER WILL RAISE ITS TEMPERATURE DEGREE F BTU REMOVED FROM LB OF WATER WILL LOWER ITS TEMPERATURE DEGREE F TON OF ICE MELTING WILL REQUIRE THE ADDITION OF 12000 BTUH THAT EQUALS TON OF REFRIGERATION HEAT MOVED FROM THE WARMER OBJECT TO COOLER BY CONDUCTION: HEAT ENERGY IS TRANSFERRED BY DIRECT CONTACT BETWEEN TWO OBJECTS CONVECTION: HEAT ENERGY IS TRANSFERRED BY CURRENTS SET IN MOTION BY THE EXPANSION OF THE WARMER MEDIUM (AIR,WATER, ECT.) RADIATION: HEAT ENERGY IS TRANSFERRED BY WAVE MOTION, WITHOUT INTERVIENING WITH THE MEDIUM SUPERHEAT HEAT ENERGY THAT IS ADDED TO A SUBSTANCE AFTER IT HAS COMPLETELY VAPORIZED OR BOILED SUPERHEAT EXISTS IN THE REFRIGERATION CYCLE IN THE EVAPORATOR AFTER THE REFRIGERANT HAS BOILED OFF AND HEAT ENERGY IS CONTINUALLY ADDED FROM THE AIR PASSING THROUGH THE EVAPORATOR COIL THE COMPRESSOR DISCHARGE LINE HAS A VERY HIGH SUPERHEAT DUE TO THE SUCTION SUPERHEAT, THE HEAT FROM THE COMPERSSOR MOTOR, AND THE HEAT OF COMPRESSION SATURATED TEMPERATURE THE TEMPERATURE AT WHICH A VAPOR IS IN EQUILIBRIUM WITH ITS LIQUID SATURATED PRESSURE THE PRESSURE AT WHICH A VAPOR IS IN EQUILIBRIUM WITH ITS LIQUID THE PRESSURE / TEMPERATURE CHART LISTS THE SATURATION TEMPERATURES FOR REFRIGERANTS AT A GIVEN PRESSURE PRESSURE TEMPERATURE CHART SATURATED TEMPERATURE TEMP 11 24.7 12 22 113 502 134a 123 9.1 23.9 28.2 31.1 6.5 25.9 23.9 11.8 28.2 27.9 35.9 9.1 25.3 10 23.1 14.6 32.8 27.6 41.0 11.9 24.6 15 22.1 17.7 37.7 27.2 46.5 15.0 23.7 20 21.1 21.0 43.0 26.8 52.5 18.4 22.8 25 19.9 24.6 48.7 26.3 58.8 22.1 21.8 30 18.6 28.4 54.9 25.8 65.6 26.0 20.7 35 17.2 32.5 61.5 25.2 72.8 30.3 19.5 40 15.6 36.9 68.5 24.5 80.5 35.0 18.1 45 13.9 41.6 76.0 23.8 88.7 40.0 16.6 50 12.0 46.7 84.0 22.9 97.4 45.4 15.0 55 10.0 52.0 92.5 22.2 106.6 51.1 13.1 60 7.8 57.7 101.6 21.0 116.4 57.3 11.2 65 5.4 63.7 111.2 19.9 126.7 63.9 9.0 70 2.7 70.2 121.4 18.7 137.6 71.0 6.6 75 0.0 76.9 132.2 17.3 149.1 78.6 4.0 80 1.5 84.1 143.6 15.8 161.2 86.6 1.2 85 3.2 91.7 155.7 14.3 174.0 95.1 0.9 90 4.9 99.7 168.4 12.5 187.4 104.2 2.5 95 6.8 108.2 181.8 10.6 201.4 113.8 4.2 100 8.8 117.1 195.9 8.6 216.2 124.1 6.1 105 10.9 126.5 210.7 6.4 231.7 134.9 8.1 110 13.2 136.4 226.3 4.0 247.9 146.3 10.3 115 15.6 146.7 242.7 1.4 264.9 158.4 12.6 120 18.3 157.6 259.9 0.7 282.7 171.1 15.1 125 21.0 169.0 277.9 2.2 301.4 184.5 17.7 130 24.0 180.9 296.8 3.7 320.8 198.7 20.6 135 27.1 193.5 316.5 5.4 341.2 213.6 23.6 140 30.4 206.5 337.2 7.2 362.6 229.3 26.8 SATURATED PRESSURE VAPOR BUBBLES PRODUCED IN A LIQUID AS ITS PRESSURE IS REDUCED WITHOUT A REDUCTION IN ITS TEMPERATURE, OR PRODUCED WHEN HEAT IS ADDED TO A LIQUID WITHOUT AN INCREASE IN PRESSURE 1% OF FLASH GAS IN THE LIQUID LINE CAN OCCUPY UP TO 17% OF THE VOLUME IN THE EVAPORATOR FLASH GAS THROUGH THE THERMOSTATIC EXPANSION VALVE CAN CAUSE IT TO “CHOKE” AND NOT FEED PROPERLY FLASH GAS DOES NO WORK IN THE EVAPORATOR, BUT MUST BE COMPRESSED AGAIN AND WILL OCCUPY SPACE IN THE CONDENSER SENSIBLE HEAT ~ HEAT WHICH IS ADDED TO OR REMOVED FROM A SUBSTANCE THAT CHANGES ITS TEMPERATURE LATENT HEAT ~ HEAT WHICH IS ADDED TO OR REMOVED FROM A SUBSTANCE CHANGES ITS STATE OR PHASE 212F 32 F 144 BTU LATENT HEAT 32F 212F 180 BTU SENSIBLE HEAT 970 BTU LATENT HEAT AIR CONDITIONING/REFRIGERATION TAKING HEAT FROM WHERE IT IS OBJECTIONABLE AND MOVING TO WHERE IT IS UNOBJECTIONABLE SYSTEMS CONSIST OF FOUR MAJOR COMPONENT: THE CONDENSER THE METERING DEVICE THE EVAPORATOR THE COMPRESSOR SUBCOOLED LIQUID ZONE SATURATED VAPOR ZONE SUPERHEATED GAS ZONE AIR DISCHARGE ELIMINATORS WATER DISTRIBUTION SYSTEM REFRIGERANT IN AIR INTAKE REFRIGERANT OUT AIR FLOW WATER MAKE UP 205 PSIG DESUPERHEATING PSID 195 PSIG 210 PSIG PHASE CHANGE 10 PSID 175 PSIG O DEGREES OF 168 PSIG SUBCOOLING 90 F 20 PSID PSID SUBCOOLING F/D TOTAL PRESSURE DROP 42 PSI Weight: 17 Lbs 16 15 Hy-Save LPA 14 809 IND Pump Connections: Inlet = 5/8” Outlet = 5/8” Performance Curve 13 Motor Data: Horsepower = 0.13 Voltage = 208/230/460/3/60 Amperage = 0.57/0.56/0.26 RPM =3450 12 11 Head ( feet ) 10 Preferred Operating Range 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Flow ( GPM ) 3.5 4.0 4.5 5.0 35 Weight: 30 Lbs Hy-Save LPA Pump Connections: Copper Stubbed Inlet = 1/8” Outlet = 7/8” 820-all models 30 Performance Curve Motor Data: Horsepower = 0.4 Voltage = 208/230/460/3/60 Amperage = 1.7/1.6/0.8 RPM = 3450 Head ( feet ) 25 20 15 Preferred Operating 10 0 Flow ( GPM ) 10 11 12 Weight: 32Lbs 50 Hy-Save LPA 45 833-all models Performance Curves 40 Motor Data: Horsepower = 0.4 Voltage = 208/230/460/3/60 Amperage= 1.7/1.6/0.8 RPM = 3450 35 Auxiliary Port Head ( feet ) Main 30 25 20 Preferred Operating 15 10 0 Flow ( GPM ) 10 Pump Connections: Copper Stubbed Inlet = 5/8” Outlet = 7/8” 12 14 55 50 Weight: 44Lbs Hy-Save LPA Pump Connections: Copper Stubbed Inlet = 5/8” Outlet = 7/8” 860-all models 45 Performance Curve 40 Motor Data: Horsepower =0.6 Voltage = 208/230/460/3/60 Amperage = 2.1/2.0/1.0 RPM = 3450 Head ( feet ) 35 30 25 Preferred Operating 20 15 10 0 10 15 20 Flow ( GPM ) 25 30 35 40 50 Weight: 49Lbs Hy-Save LPA 45 Pump Connections: Copper Stubbed inlet =1 5/8” outlet =1 1/8 875-IND Performance Curve 3.25" Impeller 40 Head ( feet ) 35 Motor Data: Horsepower=.75 Voltage= 208/203/460/3/60 Amperage= 2.4/2.2/1.1 RPM=3450 30 25 20 Preferred Operating 15 10 0 10 15 20 25 30 Flow ( GPM ) 35 40 45 50 [...]... CHANGE TO TAKE PLACE AT A LOWER PRESSURE DESUPERHEATING PHASE CHANGE SUBCOOLING LIQUID REFRIGERANT IN FROM CONDENSER WATER REFRIGERANT OUT OUT WATER IN LIQUID REFRIGERANT OUT & SUBCOOLED REFRIGERANT IN AIR DISCHARGE ELIMINATORS WATER DISTRIBUTION SYSTEM REFRIGERANT IN AIR INTAKE REFRIGERANT OUT AIR FLOW WATER MAKE UP SUBCOOLED LIQUID ZONE SATURATED VAPOR ZONE SUPERHEATED GAS ZONE T X V CONDENSER EVAPORATOR... OF THE SYSTEM WHERE THE SUPERHEATED REFRIGERANT ENTERS, AS HEAT IS REMOVED THE REFRIGERANT IS DESUPERHEATED TO ITS SATURATION TEMPERATURE HEAT IS REMOVED AND THE REFRIGERANT STARTS TO CONDENSE OR CHANGE PHASE TO A LIQUID MORE HEAT IS REMOVED AND THE LIQUID REFRIGERANT IS SUB COOLED SUBCOOLED LIQUID ZONE SATURATED VAPOR ZONE SUPERHEATED GAS ZONE THE CONDITION A LIQUID IS AT WHEN ADDITIONAL HEAT ENERGY... 362.6 229.3 26.8 SUBCOOLED LIQUID 15F TEMP 11 0 24.7 5 12 210 PSIG 105F SCT 90 F 210 PSIG ON OUR P/T CHART = 105F WE MEASURE 90F WITH OUR THERMOMETER WE SUBTRACT 90F FROM 105F WE HAVE 15 DEGREES OF SUBCOOLING SUPERHEATED GAS PHASE CHANGE SUBCOOLER LIQUID DISCHARGE HEADER LIQUID HEADER SUBCOOLER LIQUID LINE DISCHARGE LINE LIQUID HEADER DISCHARGE HEADER SUBCOOLER LIQUID LINE LIQUID HEADER INTERMEDIT UNIT... CONDENSED TO A LIQUID THE DIFFERENCE BETWEEN THE LIQUID SATURATION TEMPERATURE AND THE MEASURED TEMPERATURE AT A GIVEN PRESSURE A SUB COOLED LIQUID WILL NOT HAVE ANY VAPOR BUBBLES OR FLASH GAS LIQUID SUBCOOLING IS THE DIFFERENCE BETWEEN THE LIQUID SATURATION TEMPERATURE AND THE MEASURED LIQUID TEMPERATURE AT A GIVEN PRESSURE ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ LIQUID SUB... CONDENSER EVAPORATOR COMPRESSOR BASIC REFRIGERATION CYCLE FLOW FLOW THE THERMOSTATIC EXPANSION VALVE ( TEV ) IS A DEVICE DESIGNED TO REGULATE THE RATE OF LIQUID REFRIGERANT FLOW INTO THE EVAPORATOR IN THE EXACT PROPORTION TO THE RATE OF EVAPORATION OF THE LIQUID REFRIGERANT IN THE EVAPORATOR A THERMOSTATIC EXPANSION VALVE IS TRYING TO CONTROL SOMETHING THAT HAS ALREADY HAPPENED FLOW THERMAL BULB FLOW THREE... COOLING IS OBTAINED BY THE FOLLOWING • PROVIDING SPACE IN THE CONDENSER TO REMOVE HEAT ENERGY (BTUs) FROM THE LIQUID • PROVIDE AN EXTERNAL TO THE SYSTEM MEANS OF HEAT EXCHANGE TO REMOVE BTUs FROM THE LIQUID • PROVIDE AN INTERNAL TO THE SYSTEM MEANS OF HEAT EXCHANGE TO REMOVE BTUs FROM THE LIQUID PRESSURE TEMPERATURE CHART 22 113 502 134a 123 9.1 23.9 28.2 31.1 6.5 25.9 23.9 11.8 28.2 27.9 35.9 9.1... AND SUCTION PRESSURE LIFTS THE DIAPHRAM AND THE VALVE PASSES LESS REFRIGERANT TO THE EVAPORATOR Diaphragm FLOW Thermal bulb FLOW AS THE LOAD ON THE EVAPORATOR INCREASES THE PRESSURE FROM THE THERMAL BULB INCREASES AND OVER COMES THE SPRING & SUCTION PRESSURE THIS INCREASE IN PRESSURE AND PUSHES THE VALVE STEM DOWNWARD FEEDING MORE LIQUID REFRIGERANT INTO THE EVAPORATOR FLOW FLOW THERMAL BULB EQUALIZING... 4250(1928) 4800(2223) 4900(2223) 6200(2813) REFRIG CHARGE, R-22 ckt2 ckt1 ckt2 ckt1 TOTAL LBS 40 OVER CLEAR GLASS LBS 40 18.I 18.1 60 38 18.1 18.1 ckt2 ckt1 71 ckt2 ckt1 65 18.1 18.1 85 20 65 20 ckt2 ckt1 106 71 48.1 32.2 THE OVER CHARGING METHOD OF OBTAINING SUB COOLING THE CONDENSER IS OVER CHARGED BY THE MANUFACTURE TO OBTAIN SUB COOLING THE OVER CHARGED REFRIGERANT OCCUPIES SPACE IN THE CONDENSER THAT SHOULD ... SUPERHEATED GAS PHASE CHANGE SUBCOOLER LIQUID DISCHARGE HEADER LIQUID HEADER SUBCOOLER LIQUID LINE DISCHARGE LINE LIQUID HEADER DISCHARGE HEADER SUBCOOLER LIQUID LINE LIQUID HEADER INTERMEDIT UNIT MODEL... FROM CONDENSER WATER REFRIGERANT OUT OUT WATER IN LIQUID REFRIGERANT OUT & SUBCOOLED REFRIGERANT IN AIR DISCHARGE ELIMINATORS WATER DISTRIBUTION SYSTEM REFRIGERANT IN AIR INTAKE REFRIGERANT OUT AIR... REMOVED THE REFRIGERANT IS DESUPERHEATED TO ITS SATURATION TEMPERATURE HEAT IS REMOVED AND THE REFRIGERANT STARTS TO CONDENSE OR CHANGE PHASE TO A LIQUID MORE HEAT IS REMOVED AND THE LIQUID REFRIGERANT