Danfoss Adaptive Energy Optimization Installation guide
Adaptive Energy Optimization (AEO)
with High Speed Electronit Unit
Technical Info
Introduction
Herewith a description of a function
in the high speed electronic unit.
The unit contains a feature called
Adaptive Energy Optimization
(AEO). It is very suitable for systems
with huge load variations and
applications where energy is an
important issue.
Function
Inital start up conditions
Every start up of the compressor
takes place at low speed (soft start).
The start up speed is equal to: the
speed at thermostat cut out minus
300 rpm. After start up the speed
of the compressor will be ramped
up and adapted to the load. The
ramp up speed is 9.4 rpm/min.
Adaptation of the capacity
The software algorithm adapts the
capacity of the compressor to the
actual load of the system.
.
The unit regulates the capacity
so that the compressor runtime is
approximately 24 minutes. If the
compressor does not reach cut out
temperature within 48 minutes the
speed is set to 4400 rpm.
Example how to determine the speed
Start up speed: 3250 rpm
Runtime: 15 minutes
Speed at cut out: 3250+(9.4x15)
~3390 rpm
Start up speed: 3390-300 = 3090 rpm
Runtime: 20 minutes
Speed at cut out: 3090+(9.4x20)
~3280 rpm
Start up speed: 3280-300= 2980 rpm
Runtime: 30 minutes
Speed at cut out: 2980+(9.4x30)
~3260 rpm
Curves
The graphs on page 2 show the relation between cabinet temperature and speed. After a power cut
out the start speed will always be
set to 3250 rpm.
After a thermostat cut out the start
up speed is calculated as speed at
stop minus 300.
The speed will be adapted
automatically so that the thermostat runtime will be approximately
24 minutes.
Benefits
• Independent of load variations
• Energy savings
• Reduced number of compressor
starts
• Prevents short cycling of the
compressor
• Battery protection
• Soft start in tropical conditions
Code nos.
Single pack 101N0280
Industrial pack 101N0281 (28 pcs)
REFRIGERATION AND
AIR CONDITIONING
4400
3250
2500
0
RPM
°C
4100
4200
3900
4100
3800
4250
3950
24 min. 24 min.
Cabinet temperature
48 min.
4400
8544
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on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed.
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Danfoss Compressors GmbH
Mads-Clausen-Str. 7
D-24939 Flensburg / Germany
compressors.danfoss.com
DEHC.EI.100.A2.02/520N0198 Produced by Danfoss Compressors, DEHC6093, 09.2005
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