Refrigerating Engineers & Technicians Association. Industrial Refrigeration 1 Final Examination for Course Credit Supplemental Materials Package
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1 Refrigerating Engineers & Technicians Association Industrial Refrigeration 1 Final Examination for Course Credit Supplemental Materials Package - June 1,
2 Commonly Used Refrigerants Refrigerant Number Name Chemical Symbol CFC-11 Trichloromonofluoromethane CCl 3 F CFC-12 Dichlorodifluoromethane CCl 2 F 2 HCFC-22 Monochlorodifluoromethane CHClF 2 CFC % R % R-152a CCl 2 F 2 + C 2 H 4 F 2 HCFC % R % R-115 CHClF 2 +CClF 5 R-717 Ammonia NH 3 R-718 Water H 2 0 Refrigerant Characteristics 10 F Evaporator Temperature, 95 F Condensing Temperature Refrigerant Evaporator CondensingTheoretical Refrigerating Mass Flow CFM/ Discharge Effect Rate volume ton (psig) (psig) Temperature (BTU/lb.) ( F) (lb./min/ton) (Cu. ft./ib.) CFC * CFC HCFC CFC HCFC R *inches of mercury vacuum 2
3 A Comparison of Theoretical Discharge Temperatures of Reciprocating Compressors at Various Evaporator Temperatures Evaporator Condensing Temperature CFC-12 HCFC-22 R-717 Temperature Temperature Difference in Discharge Discharge Discharge in F 95 F F ( T) Temp. F Temp. F Temp. F Theoretical Discharge temperatures ( F) for Ammonia at various operating pressures Condensing Press./Temp Psig F Suction s and Corresponding Saturation Temperatures psig / 65.9 F psig / 70.4 F psig / 74.7 F psig / 78.7 F psig / 82.6 F psig / 86.2 F psig / 89.7 F psig / 93.1 F psig / 96.2 F psig / 99.4 F psig / l02.3 F psig / l05.2 F psig / l08 0 F
4 Reference Table for Ammonia Storage Temperature F Pounds of Ammonia per ONE Cubic Foot (lb./ft 3 ) Cubic Feet in ONE Pound of Ammonia ()
5 SOURCE: INTERNATIONAL INSTITUTE OF AMMONIA REFRIGERATION PROPERTIES BOOK TABLE -1 Refrigerant R717 (Ammonia) Absolute liquid hg hg hg hg hg hg hg hg hg hg hg hg hg hg hg hg hg hg hg hg hg hg hg hg hg
6 Refrigerant R717 (Ammonia) Absolute liquid hg hg hg hg hg hg hg hg hg hg hg hg psig
7 Refrigerant R717 (Ammonia) Absolute liquid
8 Refrigerant R717 (Ammonia) Absolute liquid
9 Refrigerant R717 (Ammonia) Absolute liquid
10 Refrigerant R717 (Ammonia) Absolute liquid
11 Refrigerant R717 (Ammonia) Absolute liquid
12 Refrigerant R717 (Ammonia) Absolute liquid
13 TABLE 2 Absolute Refrigerant HCFC-22 liquid hg hg hg hg hg hg hg hg hg hg hg hg hg hg hg hg hg hg hg hg hg hg hg hg psig
14 Absolute Refrigerant HCFC-22 liquid
15 Absolute Refrigerant HCFC-22 liquid
16 Absolute Refrigerant HCFC-22 liquid
17 Absolute Refrigerant HCFC-22 liquid
18 Absolute Refrigerant HCFC-22 liquid
19 Absolute Refrigerant HCFC-22 liquid
20 Absolute Refrigerant HCFC-22 liquid
21 This page left intentionally blank 21
22 300.0 VAPOR PRESSURE CURVE AMMONIA P S I A P S I G TEMPERATURE IN DEGREES FAHRENHEIT 22
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