Energy Recovery Systems - Atlas Copco ga55+ Instruction Book

Instruction book
Reference
4
5
6
7
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 Atlas Copco for installing and connecting the energy recovery unit.
5.2

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). In heat exchanger (HE) the compression heat is
transferred from the compressor oil to the water. The water leaves heat exchanger (HE) via outlet connection
(2).
9096 3313 00
Designation
Temperature sensor, water outlet pipe
Oil drain plug
Oil line from compressor oil separator vessel to ER unit
Oil line from ER unit to oil filter housing
Location of heat exchanger by-pass valve (BV2)
Heat exchanger
Selector valve
Oil separator vessel
Oil filter housing
Location of oil cooler bypass valve (BV1)
Energy recovery data.
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