Trane CGWH 115 - Page 20

CGWH-SVX01D-E420
General start-up
Table 21 - Correction factors to apply when glycol is used in water loops
Fluid type Glycol Concentration Performance Evaporator Condenser
Evaporator Condenser F-CC F-PI F-FLEVP F-PDEVP F-FLCDS F-PDCDS
Water only 0% 0% 1.00 1.00 1.00 1.00 1.00 1.00
Ethylene Glycol
10% 0% 0.99 1.00 1.02 1.02 1.00 1.00
20% 0% 0.98 1.00 1.05 1.06 1.00 1.00
30% 0% 0.97 1.00 1.10 1.10 1.00 1.00
0% 10% 1.00 1.00 1.00 1.00 1.02 1.05
0% 20% 1.00 1.01 1.00 1.00 1.04 1.09
0% 30% 1.00 1.02 1.00 1.00 1.08 1.14
Mono-Propylene
Glycol
10% 0% 0.99 1.00 1.01 1.05 1.00 1.1
20% 0% 0.97 1.00 1.03 1.10 1.00 1.00
30% 0% 0.96 1.00 1.05 1.17 1.00 1.01
0% 10% 1.00 1.01 1.00 1.00 1.01 1.06
0% 20% 1.00 1.01 1.00 1.00 1.02 1.13
0% 30% 0.99 1.02 1.00 1.00 1.05 1.21
The correction factors found in
Table 23 can be applied as follows:
1. Cooling capacity with glycol [kW]
= F-CC x Cooling capacity water
[kW] (found in Tables 14-15) 2.
Power Input with glycol [kW] =F-PI
x Power Input water [kW] (found in
Tables 1-4)
3. Water Flow Evaporator with
glycol [Litres/sec] = F-FLEVP x
Cooling capacity with glycol [kW] x
0.239 x (1 / Delta T Evaporator [°C])
4. Water Pressure drop Evaporator
with glycol [kPa] = F-PDEVP x Water
Pressure drop Evaporator water
[kPa] (found in Table 16)
CGWH Only:
5. Water Flow Condenser with glycol
[Litres/sec] = F-FLCDS x (Cooling
capacity with glycol [kW] + Power
input with glycol [kW]) x 0.239 x (1 /
Delta T Condenser [°C])
6. Water Pressure drop Condenser
with glycol [kPa] = F-PDCDS x Water
Pressure drop Condenser water
[kPa] (found in Table 17)
In case of application with negative
temperature at the evaporator,
combination of simultaneous usage
of glycol both in evaporator and
condenser, or usage of another type
of fluid: please contact your local
Trane sales representative.
Figure 7 - Ethylene glycol recommended concentration
0%
5%
10%
15%
20%
25%
30%
35%
40%
-12 °C -10 °C -8 °C -6 °C -4 °C -2 °C 0 °C 2 °C 4 °C
Ethylene Glycol recommended concentration
Lowest water temperature
Figure 8 - Propylene glycol recommended concentration
0%
5%
10%
15%
20%
25%
30%
35%
40%
45%
-10 °C -8 °C -6 °C -4 °C -2 °C 0 °C 2 °C 4 °C
Propylene Glycol recommended concentration
Lowest water temperature