Pressure Drop Adjustments
Pressure Drop Adjustments
Pressure Drop Adjustments
Evaporator Piping
Press Drop
Correction (ft)
54
13.25
included
included
5000
14
13.25
13.25
(inches)
15.25
Dwnstrm Dia (in)
r/d or mitre=> 2 x 45 mitre
0.031
0.074
0.886
44
13.25
included
included
14
15.25
13.25
(inches)
Dwnstrm Dia (in)
13.25
r/d or mitre=> 2 x 45 mitre
0.032
0.093
0.897
Condenser Piping
2.013
Press Drop
Correction (ft)
85
13.25
included
included
6000
14
13.25
13.25
(inches)
Dwnstrm Dia (in)
15.25
r/d or mitre=> 2 x 45 mitre
0.043
0.107
1.229
95
13.25
included
included
14
15.25
13.25
(inches)
Dwnstrm Dia (in)
13.25
r/d or mitre=> 2 x 45 mitre
0.043
0.134
1.222
2.778
* Note: The pressure drop adjustment is limited to 10% of the pressure drop reading
Notes:
1) Length (of straight pipe) - the straight pipe length of the flow tube section between the static pressure taps and the unit connection. Do not include any lengths associated with an elbow or
expansion/contraction section.
2) r/d or mitre - The worksheet calculates an adjustment for various 90 degree elbow fittings. r/d = is the turn radius of the elbow divided by the inside diameter. Mitre type elbows are
allowed for mitres <= 45 degrees.
Evaporator Piping
Upstream Pipe, Water Temperature (C)
Flow Tube Inside Diameter at Static Pressure Measurement Location (mm)
Contraction or Enlargement Section (if included - allowed for unit connections > 100mm)
Elbow Section (if included - allowed for unit connections > 100mm)
12
200
included
included
60
800
200
200
(mm)
250
Dwnstrm Dia (mm)
r/d or mitre=> 2 x 45 mitre
0.120
0.202
0.901
7
200
included
included
800
250
200
(mm)
200
Dwnstrm Dia (mm)
r/d or mitre=> 2 x 45 mitre
0.122
0.173
0.916
Condenser Piping
2.433
Press Drop
Correction (ft)
30
200
included
included
70
800
200
200
(mm)
Dwnstrm Dia (mm)
250
r/d or mitre=> 2 x 45 mitre
0.155
0.275
1.162
35
200
included
included
800
250
200
(mm)
Dwnstrm Dia (mm)
200
r/d or mitre=> 2 x 45 mitre
0.154
0.235
1.153
3.133
* Note: The pressure drop adjustment is limited to 10% of the pressure drop reading
Notes:
1) Length (of straight pipe) - the straight pipe length of the flow tube section between the static pressure taps and the unit connection. Do not include any lengths associated with an elbow or
expansion/contraction section.
2) r/d or mitre - The worksheet calculates an adjustment for various 90 degree elbow fittings. r/d = is the turn radius of the elbow divided by the inside diameter. Mitre type elbows are allowed for
mitres <= 45 degrees.