Bergen B35:40 - Charge Air Cooler; Heat Recovery Unit

2.06
, Gas
Page 3 : 6
1011 BC
For special applications elements with a different
temperature range can be offered.
As an option, we can supply a electrical/pneumatical
valve with a temperature sensor after the valve itself
and a control unit.
The electrical/pneumatical valve is being regulated
by the engine control system which reads tempera-
ture from the sensor in the pipeline.
It has a programable set-point, and works to keep
the temperature stable at max. 37 °C.
Charge air cooler
The engines have two-stage charge air coolers, i. e.
one high temperature stage cooled by high temp.
fresh water or jacket water, and one low temperature
stage cooled with low temp. fresh water.
The charge air temperature is detemined by the
charge air pressure. A pressure sensor on the engine
(21CA) gives a signal to the PLC. In the PLC there is a
preset curve that ensures a temperature of max. 37
°C at low load and increases up to 55 °C on maximal
load. The PLC controls a 3-way valve (73LT) for this
purpose.
Heat recovery unit
The heat surplus from the jacket water cooler can be
recovered in a heat recovery unit, for instance a fresh
water generator installed in the engine room.
For available heat and flow, different engine loads
condition, see technical data, chapter 1.04. A sepa-
rate circulating pump for controlling the water flow
to the heat recovery unit is required.
For larger heat recovery units (like fresh water
generators), we can supply an electric/pneumatic
valve with a temperature sensor, to utilize most of
the energy generated in the HT-cooling system.
The valve is located on the return line to the cooler/
HT-system.
Please consult Rolls-Royce Marine AS for installation
of this unit.
Heat Recovery thermostatic valve:
For larger heat recovery units like fresh water
generators, we can supply a electrical/pneumatical
valve with a temperature sensor on the pipeline and
a control unit in the high temperature cooling water
system, or in the jacket water system part of the sea-
water cooling system, to utilize all the energy gener-
ated in the HT-cooling loop, due to the technical
data for the engines. The valve is located on the re-
turn line to the cooler.
Engine unit no.2:
Used if more than one engine is connected to the
same freshwater/central cooler e.q. in a 4-engine
application it is common to split the cooling water
system into two systems, where inner/outer or
engines on same gear are on the same cooling water
system.
Generator cooler:
For generator sets the generator cooler is referred to
as “external components” in the system drawing.