Atlas Copco GA 45 VSD - Energy Recovery Operation Principles

Instruction
book


ϴϰ
1904 0504 83 

k 8 :
> ? ? > V
A ;
? >
S
>
9 : B R <
? @
7 < B
>
O
]
8 :
> ? @
;
? @
A ; : B
The use of a closed water circuit minimises make-up water requirements. Therefore, the use of soft
or even demineralised water is economically feasible and eliminates the problem of scale deposits.
Although the heat exchanger is made of stainless steel, the water circuit connected to the compressor
may require corrosion inhibitors. Consult section
Cooling water requirements to minimise problems due
to bad water quality. If in any doubt, consult Atlas Copco.
Add an anti-freeze product such as ethylene-glycol to the water in proportion to the expected
temperature to avoid freezing.
k 8 :
> ? ? > V
A ;
? >
S
>
9 : B R <
?
< 6
>
9
]
8 :
> ? @
;
? @
A ; : B
For open, non-recirculation water circuits, the major problems usually encountered are related to deposit
control, corrosion control and microbiological growth control. To minimize these problems, the water
should meet a number of requirements. See section C
ooling water requirements. If in any doubt,
consult Atlas Copco.
= >
9
> ?
8 7
The compressor oil flow is controlled by two thermostatic valves (BV1 and BV2), ensuring reliable
compressor operation and optimum energy recovery.
[
>
: 8 ; 7
>
O O
>
B
@ ?
; 6 : ; < 9
Bypass valve (BV1) is integrated in the oil filter housing of the compressor and controls the oil flow
through the main oil cooler (Co) of the compressor. Bypass valve (BV2) controls the oil flow through the
oil/water heat exchanger (HE) of the ER unit. Both valves consist of an insert (thermostat) mounted in a
housing.