19
Aermec cod. 14.09 4086982_03
NRL 2000-3600 60Hz
EN
The heating capacity that can be obtained from the
desuperheater is found by multiplying the nominal
value (Pd), by a relative co-efficient (Cd).
The following diagrams allow to obtain corrective
co-efficients to use for chillers in their various versions;
external air temperature, to which reference is made,
is shown in correspondence to each curve.
In heat pump models the desuperheater must be
shut-off in heat pump mode, or the warranty will be
come void..
PRESSURE DROPS
The NRL models with desuperheater have 2 desu-
perheaters for all sizes (positioned in parallel).
NOTE
Desuperheater features and pressure drop curves are
shown below.
For temperature values of produced water, different
from 50°C, multiply the result by the corrective factor.
Nominal value referring to:
Air temperature
35°C/95°F
Water at the desuperheater
45/50°C 113/122 °F
∆t
5°C/41°F
Units with Desuperheater (D) do not envision the
following versions:
YD
XD (only for temperature under 4°C/39.2°F)
45°C
40°C
35°C
30°C
25°C
0.00
35
40
45
50
55
60
65
0.50
1.00
1.50
2.00
2.50
3.00
20°C 68°F
95
100
105
110
115
120
125
130
135
140
145
149
113°F
104°F
95°F
86°F
77°F
Temperature of water produced at the desuperheater ∆t 5°C 41 °F
Corr
ectiv
e c
o-e
fficien
ts Cd
DESUPERHEATER CORRECTIVE COEFFICIENTS
11.
DESUPERHEATER
DESUPERHEATER PRESSURE DROP
Average water temperature°C
30
40
50
60
70
Average water temperature °F
86
104
122
140
158
Multiplicative co-efficients
1.04
1.02
1
0.98
0.96
psi
kPa
l/h
gmp
Pr
essur
e dr
op
Water flow rate
0
50
100
150
200
250
300
350
400
440
0
1
2
3
4
5
6
7
8
9
0
10
20
30
40
50
60
0
10000
20000
30000
40000
50000
60000
70000
80000
90000
100000
1
2
4
3
5
6
7
1
NRL 2000
2
NRL 2250
3
NRL 2500
4
NRL 2800
5
NRL 3000
6
NRL 3300
7
NRL 3600
