Brochure

Std. Scrolls DSH Dierence
EERnet 2.89 2.87
SEER 4.15 4.37 +5%
Pw demand (kWh) 86 223 82 516 -4%
Running costs (€) (*) 14 658 14.028 -630 €
CO
2
emission
(metric Tons) (**)
34.5 33.0 -1.5
(*) based on European average climate: 2 602 running hours
17 €cents per kWh: European average for commercial buildings
(**) 0.0004 Tons of CO
2
per kWh, EU average 2015
Std. Scrolls DSH Dierence
EER 10.2 10.2
IPLV 15.5 16.65 +7%
Pw demand (kWh) 160 943 151 402 -6%
Running costs (US$) (*) 17 092 16 079 -1 013 $
CO
2
emission
(metric Tons) (**)
95.4 89.7 -5.7
(*) based on 2 973 running hours
10.62$cents per kWh: US average for commercial buildings
(**) 0.000593 Tons of CO
2
per kWh, US average 2015
Chiller parameters:
Tcond: 50° C
Tevap: 3.5° C
Fan Pw: 9.5%
of Compressor Power at
full load
Chiller parameters:
Tcond: 122° F
Tevap: 39° F
Fan Pw: 9.5%
of Compressor Power at
full load
North American IPLV
according to ANSI/AHRI
standard 550/590
150 TR A/W Chillers
Fixed outlet water
temperature control
@ 44°F
European SEER
according to EN14825
385 kW A/W Chillers
Variable outlet water
temperature control
from 7 to 11.5°C
Danfoss IDVs
Danfoss Intermediate Discharge Valves
(IDVs) mechanically reduce excessive
compression of refrigerant under
part-load conditions while maintaining
the same cooling capacity. They adapt
the effort of the motor to the pressure
conditions in the system by opening
when the pressure ratio (part-load) fall
Gas discharge
Low Pressure Ratio, part-load,
discharge pressure is low, IDVs open
 High Pressure Ratio, full load and
heating mode, discharge pressure is
high, IDVs close
below the built-in optimization point of
the scroll. This reduces the effort of the
motor and its electrical consumption thus
improving the system’s seasonal energy
efficiency. IDV technology enhances
system efficiency by 10-12% on average
in Water-to-Water chillers and by 8-10% in
rooftops and 6-8% in Air-to-Water chillers.
Less CO
2
emissions
9Compressors for Commercial Air Conditioning