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Reference
1
2
3
4
5
6
7
PRV
BV2
HE
V1
AR
OF
BV1
Field installation
The main components are assembled ex-factory as a compact unit which fits inside the bodywork
of the compressor. Consult your dealer for installing and connecting the energy recovery unit.
4.2
Energy recovery systems
General
The energy recovery systems can be applied as low temperature rise/high water flow systems or as
high temperature rise/low water flow systems.
Low temperature rise/high water flow systems
For this type of application, the temperature difference between the water in the energy recovery
system and the compressor oil is low. As a consequence, a high water flow is needed for maximum
energy recovery.
Example: The heated water is used to keep another medium at a moderately high temperature, in a
closed circuit, e.g. central heating.
High temperature rise/low water flow systems
For this type of application, a high water temperature rise in the energy recovery system is
obtained, which consequently brings on a low flow rate.
Example: An open circuit where cold water from a main supply is heated by the energy recovery
system for use in a factory, e.g. pre-heating of boiler feed water.
Recovery water flow
For the references, see section
The recovery water enters the unit at inlet connection (1). The compression heat is transferred from
the compressor oil to the water in the heat exchanger (HE). The water leaves heat exchanger (HE)
via outlet connection (2).
52
Designation
Water inlet pipe
Water outlet pipe
Temperature sensor, water inlet pipe
Temperature sensor, water outlet pipe
Oil drain plug
Oil flexible from compressor oil separator vessel to ER unit
Oil flexible from ER unit to oil filter housing
Pressure relief valve
Location of heat exchanger by-pass valve (BV2)
Heat exchanger
Selector valve
Oil separator tank
Oil filter housing
Location of oil cooler bypass valve (BV1)
Energy recovery
data.
Instruction book
2920 7196 21
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