ASHRAE Journal - April 2020 - 60

ASHRAE - CELEBRATING 125 YEARS

regulatory standards are helping to change the game
ahead of technology developments. The evolving standards are pushing up the efﬁciency requirements and
driving refrigerants to new low-GWP alternatives,
which are optimally lower-pressure to maximize efﬁciency and capacity while minimizing ﬂammability
and GWP. This in turn helps enable the opportunity for
alternative technologies which are optimized to move
a high volume of low-pressure ﬂuids, such as multistage, direct-drive, high-speed, magnetic bearing, oilfree centrifugals.
In other words and keeping in mind the industry
lesson to not forget the customer problems you were
solving in the ﬁrst place, the efﬁciency, refrigerant and
long-term performance maintenance factors are only
becoming more important for all potential applications,
in-turn helping more customers meet their operating cost reduction and environmental goals. There is
a latent market need wherever this technology is not
already available. And, the sound level and footprint
beneﬁts are also becoming more critical, as the markets

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develop and transition away from new construction and
building space becomes tighter.
Any time there is a refrigerant change there is optimization of the designs to the new ﬂuid. Optimization
is more critical when there is a signiﬁcant pressure
change. It is not only critical for the compressors but
all components in the system which govern the ﬂow
and heat transfer of that ﬂuid. Component development and optimization is more critical when the ﬂuid
pressure change is higher and for applications which
are signiﬁcantly vested in the existing solutions. This
is of course true in general for the HVAC industry.
But, as our history and the history of the industry
shows, we are always capable of change, especially
when there are a combination of external drivers
and inherent technology beneﬁts with the change.
It's even better when you can incrementally build on
the last few compressor developments to achieve the
future goals, not requiring the bravery of those who
'changed the game'.

References
1. Danfoss Turbocor Compressors. 2018. Applications and
Installation Manual - Revision N. Danfoss Turbocor, Tallahassee, Fla.
2. Danfoss Cooling. 2018. Danfoss Cooling LinkedIn Post. https://
www.danfoss.com/en/about-danfoss/our-businesses/cooling/.
3. Rodriguez, Edward. 2018. Danfoss product presentation.
Danfoss Turbocor, Tallahassee, Fla.
4. Zamana, Luigi. 2017. Danfoss product presentation. Danfoss
GmbH, Offenbach DE.
5. Danfoss Turbocor Compressors. 2019. Making a world of
difference. Danfoss Turbocor, Tallahassee, Fla.
6. Rodriguez, Edward. 2018. Danfoss product presentation.
Danfoss Turbocor, Tallahassee, Fla.
7. Danfoss. 2018. Refrigerant Options Now and In the Future.
Danfoss A/S, Nordborg DK.
8. Danfoss Turbocor Compressors. 2018. Product development
timeline from overview presentation. Danfoss Turbocor,
Tallahassee, Fla.
9. Danfoss Turbocor Compressors. 2019. Oil-free Compressors
Maintain Consistent Performance Over Time. Danfoss Turbocor,
Tallahassee, Fla.
10. "ASHRAE Research Project Report RP-751: Experimental
Determination of the Effect of Oil on Heat Transfer in Flooded
Evaporators with R-123, R-134A." ASHRAE. 1999.
11. Rodriguez, Edward. 2019. Danfoss product picture. Danfoss
Turbocor, Tallahassee, Fla.

Bibliography
Ron Conry. 2009. A brief overview of the
Turbocor compressor - the Road to Discovery.
The Institute of Refrigeration. Kelvin House,
Carshalton, UK.

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ASHRAE Journal - April 2020

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