Table of Contents
Advertisement
3.3 Remote Radiator Cooling
A remote radiator system allows installation of
generator sets in locations where it would otherwise be
difficult to bring the volume of air required to cool a
unit-mounted radiator. In these systems, the engine
water pump pushes coolant through a radiator mounted
remotely from the generator and, typically, in an open
area. An electric motor-driven fan mounted on the
radiator circulates air across the radiator's cooling fins.
Remote radiator cooling is not applicable to enclosed
units.
Kohler Co. offers radiator assemblies that meet the
requirements to adequately cool the generator set. If
the installer uses an aftermarket radiator, follow the
general guidelines for radiator selection given in
Figure 3-7.
The following subsections provide general design
guidelines for a remote radiator system.
3.3.1
General
System limitations. Cooling systems are limited by
radiator cap ratings. The maximum radiator operating
pressure is 110 kPa (16 psi).
Air requirements. Refer to the generator set
specification sheet for radiator air and engine/generator
air requirements. Cooling air required for generator sets
equipped with a remote radiator is based on a 14_C
(25_F) rise and an ambient temperature of 29_C (85_F).
The amount of air required to ventilate the generator set
room or enclosure determines the size of the air inlet and
Specifications
Heat rejection to coolant, Btu/min.
Cooling system water flow, gpm
Maximum allowable cooling water
temperature at engine outlet, _C (_F)
Coolant inlet connection, mm (in.)
Coolant outlet connection, mm (in.)
Static head, kPa ( in. water column)
* Check for sufficient water flow if the application requires long runs between the generator set and the remote radiator.
Figure 3-7 Radiator Specifications
24
Section 3 Air and Cooling
outlet. Configure ventilation air inlet and outlet where air
flows across the generator set. Use a ventilating fan, if
necessary, to dissipate generator and engine heat loss.
Note: All remote radiators are sized for mounting in an
Static head. If the vertical distance from the engine
water pump to the radiator (known as static head) is
within the engine manufacturer's recommendations,
and the pressure drop through the piping and remote
radiator does not exceed the engine manufacturer's
limits, use the engine water pump to circulate water
through the remote radiator. The allowable static head
is listed in Figure 3-7. Exceeding the allowable static
head
components resulting in problems such as leaking water
pump seals.
Note: Size the pressure relief valve or cap to remain
The maximum horizontal distance from the generator
set to the radiator is 3 m (10 ft.).
Vent lines.
system by installing a vent line from the engine to the
radiator.
10 kW Models
(60 Hz)
(50 Hz)
574
539
10
8.5
105_ (221_) ± 3_
28 (1.1) OD
28 (1.1) OD
TBD
open area with no additional external devices
attached. Attached devices, confined installation,
louvers, dampers, ductwork, or other inlet or
outlet air restriction require resizing the radiator
to compensate for reduced airflow.
causes
excessive
under the engine pressure limit.
nonpressurized vented cap system for radiators
mounted beyond the maximum static head
specification.
Remove trapped air from the cooling
15 kW Models
(60 Hz)
(50 Hz)
813
677
11.5
9.5
105_ (221_) ± 3_
28 (1.1) OD
28 (1.1) OD
TBD
pressure
on
engine
Consider a
20 kW Models
(60 Hz)
(50 Hz)
1123
886
11.5
9.5
105_ (221_) ± 3_
34 (1.34) OD
28 (1.1) OD
TBD
TP-6609 6/08
Advertisement
Table of Contents
