Thermal Transfer Systems BOL Series - Manual (Page 5)

BO
L
[email protected] 262.554.8330 www.thermaltransfer.com
58
A
IR C
O
O
L
E
D
B
OL
Performance Curves
BOL Models with Optional t-BAR Core BOL-T -Bar Series
BOL-30
BOL-400
BOL-725
BOL-950
BOL-1200
BOL-1600
BOL-16
BOL-8
BOL-4
BOL-2000
= 5 PSI
= 10 PSI (0.34 BAR)
(0.69 BAR)
Oil P
Oil Flow GPM (LPM)
1
(3.79)
2
(7.57)
20
(75.71)
40
(151.42)
60
(227.12)
100
(378.54)
4
(15.14)
6
(22.71)
10
(37.85)
200
(757.08)
400
(1514.16)
H
ea
t R
ej
ec
tio
n
B
TU
/H
R
@
1
00
F
ET
D
10,000
20,000
40,000
60,000
80,000
100,000
200,000
300,000
400,000
600,000
800,000
1,000,000
0.05
0.1
0.2
0.3
0.4
0.5
1.1
1.6
2.1
3.2
4.2
5.3
H
ea
t R
ej
ec
tio
n
KW
/°
C OPt IONAL t-BAR CORE
SECt ION CUtAwAy
50 150 250 350 450
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
Viscosity (SSU)
Co
rr
ec
tio
n
Fa
ct
or
Pressure Drop
Oil temperature
Typical operating temperature ranges are:
Hydraulic Motor Oil
120°F - 180°F (49°C - 82.2°C)
Hydrostatic Drive Oil 160°F - 180°F (71°C - 82.2°C)
Engine Lube Oil 180°F - 200°F (82.2°C - 93.3°C)
Automatic Transmission Fluid 200°F - 300°F (93.3°C - 149°C)
Desired Reservoir temperature
oil temperature: Oil coolers can be selected using entering or leaving oil
temperatures.
off-line recirculation Cooling loop: Desired reservoir temperature is the
oil temperature entering the cooler.
return line Cooling: Desired reservoir temperature is the oil temperature
leaving the cooler. In this case, the oil temperature change must be
determined so that the actual oil entering temperature can be found.
Calculate the oil temperature change (oil
#
T) with this formula:
Oil
#
T = (BTU’s/Hr.) / (GPM Oil Flow x 210).
To calculate the oil entering temperature to the cooler, use this formula:
Oil Entering Temp. = Oil Leaving Temp + Oil
#
T.
oil pressure drop: Most systems can tolerate a pressure drop through the
heat exchanger of 20 to 30 PSI. Excessive pressure drop should be avoided.
Care should be taken to limit pressure drop to 5 PSI or less for case drain
applications where high back pressure may damage the pump shaft seals.
Note: Derate heat
rejection values 15%
if using 50Hz motors.
performance data Curve