Compressori e applicazioni per HFO

1. Technological innovations in refrigeration and air conditioning
CENTRO STUDI GALILEO
Milan, 18.03.2016
COMPRESSORS AND APPLICATIONS
FOR HFO
Piero Trevisan // BITZER Italia Srl

2. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 18th March 2016 // Page 2
Compact screw compressors for HFO
 Compact screw compressor range
 Common product feature
 Application range with new refrigerants
 Performance level
 Lubricants
 Safe operation
Summary

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Compact screw compressors for HFO
HFO -READY

4. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 18th March 2016 // Page 4
CSH Compact Screw Compressors for HFO
CSH/CSW Series
HFO ReadyCSH95113-320Y
 Extensive qualification program completed
 Released for HFO’s and HFO/HFC blends
 HFO’s implementation in BITZER software
 35 different models (HFO – READY)
 Displacement: 137m³/h -1120m³/h @50Hz
 CSH series optimized for high SDT
 CSW series optimized for low SDT
 Infinite or 4-Step capacity control: 25%-100%
 Highest energy efficiency in its class
 Lowest sound levels in its class
HFO -READY

5. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 18th March 2016 // Page 5
CSH for HFO application limits

6. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 18th March 2016 // Page 6
Performance level of compact screw compressors
with R1234yf and R1234ze(E)
/ R1234yf for medium-temperature refrigeration and air-conditioning
/ R1234ze(E) for medium-temperature refrigeration, air-conditioning and
high-temperature heat pumps
0
5
10
15
20
25
-50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80
Vapourpressure[bar]
Temperature [°C]
R1234yf
R1234ze(E)
R134a

7. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 18th March 2016 // Page 7
Performance level of compact screw compressors
with R1234yf and R1234ze(E)
R1234yf
Cooling capacity and efficiency (full and part load) very similar to R134a
R1234ze(E)
Efficiency very similar to R134a
Cooling capacity about 25% less than with R134a
R1234yf slightly better in case of low condensing temperature
R1234ze(E) slightly better in case of high condensing temperature
Both refrigerants match very well with screw compressors!

8. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 18th March 2016 // Page 8
Lubricant choice
CHEMICAL STABILITY OF REFRIGERANT AND OIL
/ No long-term experience with HFO refrigerants
/ Water content increases oil acidity (POE). To be done as good
engineering practice.
Compact screw CSH Standard Oil BSE170
Compact screw CSW Standard Oil BSE170L
OIL SELECTION

9. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 18th March 2016 // Page 9
Safety & Flammability
TO ASSEMBLE A SAFE SYSTEM WITH HFO REFRIGERANTS
CSH/CSW screw compressors
are approved for HFO
+
Individual risk assessment considering
current standards and regulations
Safety risks
Flammability
Formation of hydrofluoric acid

10. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 18th March 2016 // Page 10
SAFE SYSTEMS WITH HFO REFRIGERANTS
/ Differences between R1234yf and R1234ze(E)
 Higher requirements for transport and storage for R1234yf
according to safety data sheet
 R1234yf is flammable and special requirements apply (e.g.
special driving license), while R1234ze(E) is non-flammable
 Higher requirements for design and production of pipework and
heat exchangers for R1234yf in the PED 2014/68/EU
 R1234yf is classified in fluid group 1 (dangerous substances),
while R1234ze(E) is in fluid group 2 (all other substances)
IMPORTANT BACKGROUND INFORMATION
R1234yf R1234ze(E)

11. BITZER Italia // PT // Compressors and applications for HFO // Centro Studi Galileo // 18th March 2016 // Page 11
SAFE SYSTEMS WITH HFO REFRIGERANTS
/ For all refrigeration systems, R1234ze(E) is flammable
(R1234yf is also flammable)
 Industrial standards (e.g. prEN 378-1:2013) are applied
 Test temperature of the flammability test (60°C) is higher than
the one considered for the safety data sheet (20°C) and
PED 2014/68/EU
/ It is highly recommended to do an individual risk assessment of
the system with help of certified bodies and experts
IMPORTANT BACKGROUND INFORMATION

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SAFE SYSTEMS WITH HFO REFRIGERANTS
/ The followings ones are examples of industrial standards,
international and local regulations for the system manufacturer
 Machinery directive: 2006/42/EC
 Safety requirements for refrigeration systems: e.g. EN 378
 Workplace safety regulations
 Product safety regulations: e.g. PED 2014/68/EU
 Operational safety and accident prevention
 ATEX directives: e.g. 2014/34/EU and 1999/92/EC
 Internal regulations from end user
/ Further standards and regulations might apply
THE RISK ASSESSMENT FOR THE SYSTEM