Mortimer Test

Liquid line sizing

50 feet liquid line + 200 feet estimated equivalent length = 250 feet

115 condensing temp – 180F subcooling= 97oF

400F evap temp

System load 60 tons

Interpolation correction factor

95 - .95

100 - .98

Change in temp=5 – Change in cap=.03

.03÷5=.006 Correction factor =.96

60 tons x .96 correction factor= 57.6 tons

250 feet, 57.6tons= 11/8

11/8 would not be good because the gas velocity is way above 4000

Suction line

20 feet

97 condensing

40 evap

60 ton system load

Interpolation correction factor

95 – 1.03

100 – 1.01

Change in temp=5 Change in cap=.02

.004÷5=.004 correction factor=1.022

60tons x 1.022= 61.32

20feet, 61.32tons=31/8

This is a good size because the gas velocity is about 2500

15 feet double riser

3 short radius elbows x 8.0= 24

1 line tee x 5.4=5.4

2 long radius elbows x 5.1=10.2

54.6 feet

54.6 feet, 61.32=31/8

This is a good size because the gas velocity is about 2500

Discharge line

15 feet

Interpolation correction factor

95 – 1.04

100- 1.02

Change in temp=5 Change in cap=.02

0.02÷5=1.048

60tons x 1.048=62.88

15feet, 62.88=21/8

21/8 is a good size because the didcharge gas velocity is about 2500

8 feet double riser

2 short radius elbows 5.2= 10.4 feet

2 long radius elbows 3.4 6.8

25.2

62.88 tons, 25.2 feet 21/8

21/8 is a good size because the didcharge gas velocity is about 2500

2

10tons

Condensing temp 1000F==223.94

Suction temp 400F

Psia at valve inlet

104 - 222.42

106 – 228.50

Change in temp=4 change inpsia =6.08

6.08÷4=1.52

Psia=223.94

Less psi drop in liquid line=2

Less loss of head due to 20 feet hight=9.9

Psia at inlet+212.04

Psia at valveoutlet

400F suction temp at compressor=83.206

Plus pressure drop at suction line=2

Plus pressure drop across coil and distributor=20

Psia at valve outlet=...