CO2 as a refrigerant

Innovations in Commercial RefrigerationRefrigeration

27th September 2010

F i C lti AGFrigo-Consulting AGCO2

Engineering CommercialIndustrialVacuum-SystemsIce slurries

www.frigoconsulting.com

ConsultingSpecifications

Ice slurries

Support

Optimization

Atmosphere 2010, Brussels, 27.9.2010 2Frigo-Consulting AG, Raphael Gerber

CO i l fCO2 commercial referencesRunning CO2 installations, Switzerland (engineered by Frigo-Consulting AG)

120

140

gera

tion

stores with sub- and transcritical installations

80

100

mm

erci

al re

frig

and

LT):

stores with subcritical installations

40

60

and

larg

e co

m(H

T, M

T a

0

20

03 04 05 06 07 08 09 10

med

ium

a

Atmosphere 2010, Brussels, 27.9.2010 3Frigo-Consulting AG, Raphael Gerber

2003

2004

2005

2006

2007

2008

2009

2010

th t ti l f COthe potential of CO2

components are available and are being optimized

l i l d i lecological and economical advantages are pushingthermodynamic potential is promisingthermodynamic potential is promising

Atmosphere 2010, Brussels, 27.9.2010 4Frigo-Consulting AG, Raphael Gerber

ffi i t dcompressors: efficiency trend

Atmosphere 2010, Brussels, 27.9.2010 5Frigo-Consulting AG, Raphael Gerber

ffi i t dcompressors: efficiency trend

Reference: Javerschek, O.; Dittrich, G.: Advanced compressor design and various systems for commercial applications with CO2. IIR International Conference on Compressors and Coolants, Papiernicka 2009

Atmosphere 2010, Brussels, 27.9.2010 6Frigo-Consulting AG, Raphael Gerber

p p

ffi i t dcompressors: efficiency trend

Atmosphere 2010, Brussels, 27.9.2010 7Frigo-Consulting AG, Raphael Gerber

l t i th ffi iexamples to improve the efficiency

adiabatic or wet heat rejection (water spray)multiple expansion and compression (flash-tank,p p p (parallel compression)work extracting expansion (ejector, expander)subcooling the liquid CO2

clever controlsheat transfer (microchannels)

Atmosphere 2010, Brussels, 27.9.2010 8Frigo-Consulting AG, Raphael Gerber

fl h t k topen flash-tank systems

Atmosphere 2010, Brussels, 27.9.2010 9Frigo-Consulting AG, Raphael Gerber

Growa Bern, Switzerland, low temperature installation, Q‘0 = 50 kW

P ll l iParallel compression

Prodega Givisiez Switzerland medium

Atmosphere 2010, Brussels, 27.9.2010 10Frigo-Consulting AG, Raphael Gerber

Prodega Givisiez, Switzerland, mediumtemperature installation, Q‘0 = 150 kW

i hi h drecovering high grade energy

expected energy savings:• 10-15% in average• up to 30% at high ambient temperatures

Atmosphere 2010, Brussels, 27.9.2010 11Frigo-Consulting AG, Raphael Gerber

i i it (ECU)expansion-compression-unit (ECU)

Measurement example of 2.7.2010:- ambient Temperature +28 °C- Evaporating Temperature -10 °C

Source: Wenzel, M; CO2-Expander-Kompressoreinheit:Weiterentwicklung, Einbindung in Kälteanlagen und Regelung, DKV Berlin, 2009

Atmosphere 2010, Brussels, 27.9.2010 12Frigo-Consulting AG, Raphael Gerber

i i it (ECU)expansion-compression-unit (ECU)

customer contractors

consultant

suppliers

sponsors

Prodega Basel, Switzerlandmedium temperature installation, Q‘0 = 80 kW

Atmosphere 2010, Brussels, 27.9.2010 13Frigo-Consulting AG, Raphael Gerber

HOW to Bring Natural RefrigerantsHOW to Bring Natural Refrigerants Faster to Market through Innovations…

benefit from the technical potential of th f i t CO

think long term...- prove energy efficiency

- show pay back- consider rising energy

find partners...the refrigerant CO2cost

go greendon’t underestimate...- technical solutions

go green...- show ecological

efficiency

show advantages...-no cost risk (purchase price,

taxes)green image

Atmosphere 2010, Brussels, 27.9.2010 14Frigo-Consulting AG, Raphael Gerber

- green image

th kthank you.

Atmosphere 2010, Brussels, 27.9.2010 15Frigo-Consulting AG, Raphael Gerber