Technical data

7. ETHYLENE GLYCOL MIXTURE
Ethylene glycol and water mixture, used as a heat-conveying fluid, cause a variation in unit performance. For correct data, use the fac-
tors indicated in the following tabel.
cPf: cooling power correction factor
cQ: flow correction factor
cdp: pressure drop correction factor
For data concerning other kind of anti-freeze solutions (e,g, propylene glycol)
please contact our Sale Department.
ff: fouling factors
f1 - f2: potential correction factors
fk1 - fk2: compressor power input correction factors
r3: capacity correction factors
KE: minimum condenser outlet temperature increase
KC: maximum condenser outlet temperature decrease
8. FOULING FACTORS
Performances are based on clean condition of tubes (fouling factor = 1). For different fouling values, performance should be adjusted
using the correction factors shown in the following table.
9. HYDRAULIC DATA
Water flow and pressure drop
Water flow in the heat exchangers is given by: Q=Px0,86/Dt
Q: water flow (m
3
/h)
Dt: difference between inlet and outlet water temp. (°C)
P: heat exchanger capacity (kW)
Pressure drop is given by: Dp= K x Q2/1000
Q: water flow (m
3
/h)
Dp: pressure drop (kPa)
K: unit size ratio
Q min: minimum water flow admitted to the heat exchanger
Q max: maximum water flow admitted to the heat exchanger
C.a. min: minimum water content admitted in the plant, using traditional control logic
C.A.S.: heat exchanger water content
- - -
Freezing point (°C)
0 -5 -10 -15 -20 -25 -30 -35
Ethylene glycol percentage by weight
0 12% 20% 30% 35% 40% 45% 50%
cPf 1 0,985 0,98 0,974 0,97 0,965 0,964 0,96
cQ 1 1,02 1,04 1,075 1,11 1,14 1,17 1,2
cdp 1 1,07 1,11 1,18 1,22 1,24 1,27 1,3
FOULING FACTORS EVAPORATOR CONDENSER/RECOVERY DESUPERHEATER
ff (m
2
°CW) F1 FK1 KE [°C] F2 FK2 KC [°C] R3
0 1,000 1,000 0,0 1,000 1,000 0,0 1,000
1,80 x 10
-5
1,000 1,000 0,0 1,000 1,000 0,0 1,000
4,40 x 10
-5
1,000 1,000 0,0 0,990 1,030 1,0 0,990
8,80 x 10
-5
0,960 0,990 0,7 0,980 1,040 1,5 0,980
13,20 x 10
-5
0,944 0,985 1,0 0,964 1,050 2,3 0,964
17,20 x 10
-5
0,930 0,980 1,5 0,950 1,060 3,0 0,950
PLANT SIDE COLD HEAT EXCHANGER S OURCE SIDE HEAT EXCHANGER AUXILIARY SIDE HEAT EXCHANGER
SIZE
K
Q min Q max C.A.S. C.a.
K
Q min C.A.S. Q max K Q min C.A.S. Q max
BWR MTD2 m³/h m³/h dm³ min m³ m³/h dm³ m³/h m³/h dm³ m³/h
0011 230V 9375 0,56 2,04 - 0,027 9375 0,2 - 1,74 ----
0025 230V 7402 0,77 2,81 - 0,037 7402 0,27 - 2,35 ----
0031 230V 7250 0,95 3,44 - 0,044 7250 0,34 - 2,97 ----
0041 230V 5008 1,21 4,33 - 0,056 5008 0,43 - 3,77 ----
0025 400V 7402 0,78 2,72 - 0,037 7402 0,26 - 2,42 ----
0031 400V 7250 0,96 3,44 - 0,044 7250 0,33 - 2,93 ----
0041 400V 5008 1,27 4,5 - 0,056 5008 0,44 - 3,93 ----
0061 400V 2949 1,69 6,11 - 0,08 2949 0,57 - 5,16 ----
0071 400V 2037 2,13 7,71 - 0,1 2037 0,71 - 6,39 ----
0091 400V 1316 2,46 8,8 - 0,115 1316 0,82 - 7,42 ----
0101 400V 1373 2,8 9,98 - 0,13 1373 0,94 - 8,55 ----
0121 400V 860 3,59 12,84 - 0,17 860 1,2 - 10,74 ----
BWR MTD2
35
HFC 410ABWR_MTD2_0011_0121_201110_EN