Refrigeration Calculations and theory

Question 1

400 series zeotropic or azeotropic

Answer 1

zeotropic

Question 2

400 series will or will not fractionate

Answer 2

Will

Question 3

How many btu in 1 Ton of refrigeration

Answer 3

200/ min
12000/ hr
288000 /24hr

Question 4

Formula for system capacity in BTU

Answer 4

Mass Flow Rate (lb/Min) x Net Refrigeration Effect (BTU/Lb)

Question 5

Formula for Volumetric Flow Rate

Answer 5

Mass Flow Rate (lb/min) x Specific Volume (ft3/lb)

Question 6

Density and specific volume relation ship

Answer 6

Inverse
1/SV = density
1/density = specific volume

Question 7

Actual displacement formula

Answer 7

Theoretical displacement (CFM or ft3/min) x Volumetric efficiency%

Question 8

Compression ratio formula

Answer 8

Discharge / suction pressure

IN ABSOLUTE!!!

Question 9

Coefficient of performance formula

Answer 9

Net Refrigeration Effect / Heat of Compression

Question 10

Condenser correction factor formula

Answer 10

CONDENSOR Heat of Rejection / Net Refrigeration Effect

Question 11

Theoretical HP

Answer 11

Mass Flow Rate x Heat of Compression
—————————-
42.42

Question 12

Required water flow for condensor formula

Answer 12

Q BTU/HR = 500 x GPM x Temperature change

Use condensor tonnage (found by using CCF)

Use 600 for imperial gallons

Question 13

What is Approach

Answer 13

Temperature difference between Entering Air Wet bulb and leaving water dry bulb

Question 14

What is reach

Answer 14

Difference in temp between entering water dry bulb and leaving water dry bulb