TCAEY-THAEY 115÷238 - Rhoss

TXAEY 117÷133
performances
TXAEY pressure drops and residual static pressure
Graph “1”: pr essur e drops, TXAEY 117÷133 h eat exch angers
1000
124
100
133
117
10
130
Calculation of pr essur e drops
The wat er flow rate at t he exchanger is c alculat ed accordi ng to t he
followi ng formula:
○ G = (Q x 860) : ΔT
• Wher e:
G (l/h) = water fl ow rate at the exc hanger;
Q (kW) = exchanged power, which may be QF (for the evaporat or) or
QT (for the condens er), depending on t he exchanger in question;
ΔT (°C) = temperature diff erential;
○ The pr essure drops can be obtai ned from t he RHOSS selection
soft ware and can be read on the graph to the side, or c an be calculated
using the following rough for mula:
Δpw = Δpw nom x (G : G nom )²
1
1000 10000
G (l/h)
N.B.:
For all machines, ref er in any c ase to admissible operating limits and
thermal dif ferences (ΔT).
Δpw ( kPa) = nominal press ure drop at t he exchanger in question (table
on Tec hnic al data):
G (l/h) = water fl ow rate at the exc hanger in questi on;
Graph “2”:
TXAEY 117÷133 r esidu al static pr essure, instal lation P1-P2
250
240
230
133 P2
220
210
200
190
180
170
160
150
140
130
133 P1
120
110
100
90
130 P1
80
70
60
124 P1
50
117 P1
40
2500 3000 3500 4000 4500 5000 5500 6000
G (l/h)
Δpr (kPa) = Resi dual static pressur e
G (l/h) = Water flow
Graph “2”:
TXAEY 117÷133 r esidu al static pr essure, instal lation ASP1-ASP2
250
240
230
220
210
200
133 ASP2
190
180
170
160
150
140
130
120
110
100
133 ASP1
90
80
70
60
50
40
2500 3000 3500 4000 4500 5000 5500 6000
G (l/h)
Δpr (kPa) = Resi dual static pressur e
G (l/h) = Water flow
Calculation of r esidu al st atic pr essur e
The residual st atic pressure values can be obt ained from graph “2” based on measured flow rates.
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