Thermostatic expansion valves TUA/TUAE
Thermostatic expansion valves TUA/TUAE
Thermostatic expansion valves TUA/TUAE
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Technical brochure<br />
<strong>Thermostatic</strong> <strong>expansion</strong> <strong>valves</strong>, type <strong>TUA</strong>/<strong>TUA</strong>E<br />
Capacity<br />
Capacity in kW for range N = −40 → +10°C and opening superheat OS = 4 K<br />
Valve type<br />
TU<br />
TU<br />
TU<br />
Orifice<br />
no.<br />
0<br />
1<br />
2<br />
3<br />
4<br />
5<br />
6<br />
7<br />
8<br />
9<br />
0<br />
1<br />
2<br />
3<br />
4<br />
5<br />
6<br />
7<br />
8<br />
9<br />
0<br />
1<br />
2<br />
3<br />
4<br />
5<br />
6<br />
7<br />
8<br />
9<br />
Pressure drop across valve ∆p bar<br />
Pressure drop across valve ∆p bar<br />
2 4 6 8 10 12 14 16 2 4 6 8 10 12 14 16<br />
0.42<br />
0.61<br />
0.9<br />
1.2<br />
1.8<br />
2.4<br />
3.7<br />
4.9<br />
7.3<br />
10.9<br />
0.36<br />
0.47<br />
0.60<br />
0.8<br />
1.2<br />
1.7<br />
2.5<br />
3.3<br />
5.0<br />
7.4<br />
0.53<br />
0.79<br />
1.2<br />
1.6<br />
2.4<br />
3.2<br />
4.9<br />
6.5<br />
9.6<br />
14.5<br />
0.46<br />
0.62<br />
0.78<br />
1.1<br />
1.6<br />
2.2<br />
3.2<br />
4.3<br />
6.5<br />
9.7<br />
0.34<br />
0.39<br />
0.47<br />
0.66<br />
1.0<br />
1.3<br />
1.9<br />
2.6<br />
3.9<br />
5.7<br />
Evaporating temperature +10°C Evaporating temperature 0°C<br />
0.60<br />
0.89<br />
1.3<br />
1.8<br />
2.8<br />
3.7<br />
5.6<br />
7.5<br />
11.2<br />
16.7<br />
0.65<br />
1.0<br />
1.5<br />
2.0<br />
3.1<br />
4.1<br />
6.1<br />
8.2<br />
12.2<br />
18.2<br />
0.68<br />
1.0<br />
1.6<br />
2.1<br />
3.2<br />
4.3<br />
6.5<br />
8.6<br />
12.9<br />
19.3<br />
0.70<br />
1.0<br />
1.6<br />
2.2<br />
3.4<br />
4.5<br />
6.7<br />
9.0<br />
13.4<br />
20.0<br />
Evaporating temperature –10°C<br />
0.51<br />
0.70<br />
0.89<br />
1.3<br />
1.9<br />
2.5<br />
3.7<br />
5.0<br />
7.5<br />
11.1<br />
0.55<br />
0.75<br />
1.0<br />
1.4<br />
2.0<br />
2.7<br />
4.0<br />
5.4<br />
8.1<br />
12.0<br />
0.57<br />
0.79<br />
1.0<br />
1.4<br />
2.1<br />
2.8<br />
4.3<br />
5.7<br />
8.5<br />
12.6<br />
0.59<br />
0.81<br />
1.1<br />
1.5<br />
2.2<br />
2.9<br />
4.4<br />
5.9<br />
8.8<br />
13.1<br />
Evaporating temperature –30°C<br />
0.38<br />
0.45<br />
0.53<br />
0.74<br />
1.1<br />
1.5<br />
2.2<br />
2.9<br />
4.4<br />
6.5<br />
0.40<br />
0.48<br />
0.57<br />
0.80<br />
1.2<br />
1.6<br />
2.4<br />
3.2<br />
4.8<br />
7.0<br />
0.42<br />
0.51<br />
0.60<br />
0.84<br />
1.2<br />
1.7<br />
2.5<br />
3.3<br />
5.0<br />
7.3<br />
0.44<br />
0.52<br />
0.62<br />
0.87<br />
1.3<br />
1.7<br />
2.5<br />
3.4<br />
5.1<br />
7.5<br />
0.71<br />
1.1<br />
1.7<br />
2.3<br />
3.5<br />
4.6<br />
6.9<br />
9.2<br />
13.7<br />
20.5<br />
0.60<br />
0.82<br />
1.1<br />
1.5<br />
2.2<br />
3.0<br />
4.5<br />
6.0<br />
9.0<br />
13.3<br />
0.44<br />
0.53<br />
0.63<br />
0.88<br />
1.3<br />
1.7<br />
2.6<br />
3.5<br />
5.2<br />
7.7<br />
0.72<br />
1.1<br />
1.7<br />
2.3<br />
3.5<br />
4.7<br />
7.1<br />
9.4<br />
13.9<br />
20.9<br />
0.61<br />
0.83<br />
1.1<br />
1.5<br />
2.3<br />
3.0<br />
4.6<br />
6.1<br />
9.1<br />
13.5<br />
0.45<br />
0.54<br />
0.63<br />
0.89<br />
1.3<br />
1.8<br />
2.6<br />
3.5<br />
5.3<br />
7.7<br />
0.40<br />
0.55<br />
0.73<br />
1.0<br />
1.5<br />
2.0<br />
3.1<br />
4.1<br />
6.1<br />
9.1<br />
0.50<br />
0.71<br />
1.0<br />
1.3<br />
2.0<br />
2.7<br />
4.0<br />
5.4<br />
8.0<br />
12.1<br />
0.40<br />
0.51<br />
0.61<br />
0.9<br />
1.3<br />
1.7<br />
2.5<br />
3.4<br />
5.1<br />
7.6<br />
0.56<br />
0.80<br />
1.1<br />
1.5<br />
2.3<br />
3.1<br />
4.6<br />
6.2<br />
9.2<br />
13.8<br />
0.60<br />
0.86<br />
1.2<br />
1.7<br />
2.5<br />
3.4<br />
5.0<br />
6.7<br />
10.1<br />
15.0<br />
0.63<br />
0.91<br />
1.3<br />
1.8<br />
2.7<br />
3.5<br />
5.3<br />
7.1<br />
10.6<br />
15.9<br />
0.65<br />
0.93<br />
1.3<br />
1.8<br />
2.8<br />
3.7<br />
5.5<br />
7.4<br />
11.0<br />
16.4<br />
Evaporating temperature –20°C<br />
0.45<br />
0.57<br />
0.70<br />
1.0<br />
1.5<br />
1.9<br />
2.9<br />
3.9<br />
5.8<br />
8.6<br />
0.48<br />
0.62<br />
0.76<br />
1.1<br />
1.6<br />
2.1<br />
3.1<br />
4.2<br />
6.3<br />
9.3<br />
0.50<br />
0.65<br />
0.79<br />
1.1<br />
1.6<br />
2.2<br />
3.3<br />
4.4<br />
6.6<br />
9.7<br />
0.52<br />
0.67<br />
0.82<br />
1.2<br />
1.7<br />
2.3<br />
3.4<br />
4.5<br />
6.8<br />
10.1<br />
Evaporating temperature –40°C<br />
0.31<br />
0.33<br />
0.39<br />
0.55<br />
0.80<br />
1.1<br />
1.6<br />
2.1<br />
3.2<br />
4.7<br />
0.33<br />
0.36<br />
0.42<br />
0.59<br />
0.86<br />
1.2<br />
1.7<br />
2.3<br />
3.5<br />
5.1<br />
0.34<br />
0.38<br />
0.44<br />
0.61<br />
0.90<br />
1.2<br />
1.8<br />
2.4<br />
3.6<br />
5.3<br />
0.35<br />
0.39<br />
0.45<br />
0.63<br />
0.92<br />
1.2<br />
1.8<br />
2.5<br />
3.7<br />
5.5<br />
0.67<br />
0.95<br />
1.4<br />
1.9<br />
2.8<br />
3.8<br />
5.7<br />
7.6<br />
11.3<br />
16.8<br />
0.53<br />
0.68<br />
0.84<br />
1.2<br />
1.7<br />
2.3<br />
3.5<br />
4.6<br />
7.0<br />
10.3<br />
0.36<br />
0.39<br />
0.46<br />
0.64<br />
0.94<br />
1.3<br />
1.9<br />
2.5<br />
3.8<br />
5.5<br />
R22<br />
0.67<br />
0.96<br />
1.4<br />
1.9<br />
2.8<br />
3.8<br />
5.8<br />
7.7<br />
11.5<br />
17.1<br />
0.53<br />
0.69<br />
0.85<br />
1.2<br />
1.8<br />
2.3<br />
3.5<br />
4.7<br />
7.1<br />
10.4<br />
0.36<br />
0.40<br />
0.46<br />
0.65<br />
0.95<br />
1.3<br />
1.9<br />
2.5<br />
3.8<br />
5.6<br />
Correction for subcooling ∆t sub<br />
The evaporator capacity used must be corrected<br />
if subcooling deviates from 4 K.<br />
The corrected capacity can be obtained<br />
by dividing the evaporator capacity by the<br />
correction factor given below.<br />
Note:<br />
Insufficient subcooling can produce flash gas.<br />
Correction factor for subcooling ∆t sub<br />
∆t sub 4 K 10 K 15 K 20 K 25 K 30 K 35 K 40 K 45 K 50 K<br />
Correction factor 1.00 1.06 1.11 1.15 1.2 1.25 1.3 1.35 1.39 1.44<br />
Selection example<br />
Refrigerant = R22<br />
Evaporating temperature t e = −10°C<br />
Pressure drop in valve ∆p = 10 bar<br />
Subcooling ∆t sub = 15 K<br />
Evaporator capacity = 3 kW<br />
Correction value (table) = 1.11<br />
The corrected evaporator capacity thus becomes<br />
3 divided by 1.11 = 2.7 kW<br />
Since the <strong>expansion</strong> valve capacity must be equal<br />
to or slightly more than the corrected evaporator<br />
capacity of 2.7 kW, a TUB/TUBE with orifice 5 and<br />
a table capacity of 2.8 kW would be a suitable<br />
choice.<br />
© Danfoss A/S (AG-SMC / bpv), 07 - 2010 DKRCC.PD.AG0.A3.02 / 520H4543 7