Liebherr Downloads - Manual (Page 2)

2
Eco-Friendly Air Conditioning Technology
Liebherr-Transportation Systems
offers a cutting-edge eco-friendly air
cycle technology for rail vehicle air
conditioning applications. Being based
on air as refrigerant, this technology
allows to avoid chemical refrigerants.
Liebherr’s air cycle system has already
been in daily operation on European
high speed trains since five years.
The system for application in rail
vehicles is compliant to all common
passenger comfort requirements, such
as UIC 553, EN13129 and EN14750
and – as a real alternative to chemical
refrigerants – helps to reduce green-
house warming impact according to
worldwide HFC regulations. As the sys-
tem does not use any other refrigerant
than air, there is no risk of refrigerant
leakage, and the compliance with any
future legislation regarding refrigerants
in air conditioning systems is absolute
and unlimited.
While the cooling power of closed
loop vapour cycle systems can be re-
duced by high outside temperatures,
the air cycle system is not influenced
by outside temperatures. It permits
to continue operation even under ex-
tremely severe external conditions. The
open loop process offers the largest
possible resistance to defects and the
highest reliability. Furthermore closed
loop vapour cycle systems unlike air
cycle systems can suffer from leaking
which significantly reduces their cool-
ing capacity.
The Liebherr air cycle air condition-
ing systems are highly reliable also
due to their reduced number of com-
ponents. Each system consists of five
main components only, which also
contributes to a minimized failure po-
tential.
In addition, Liebherr’s air cycle tech-
nology features significantly reduced
life cycle costs compared to common
vapour cycle systems. Life cycle costs
of common systems consist not only
of direct maintenance on the system,
unscheduled vehicle downtime due to
system failure, spare part administra-
tion and power consumption, but also
of additional operating costs related to
the refrigerant circuit generated by re-
frigerant handling and disposal, retrofit
of refrigerant in order to comply with
future regulations or refrigerant empty-
ing and refilling times.
Advantages at a Glance
Low Total Cost of Ownership
Cumulative Life Cycle Cost per Unit
Air Cycle System
(left bars)
vs. Vapour Cycle System
(right bars)
Environmentally friendly technology,
no risk of refrigerant leakage
Absolute and unlimited compliance with any future
legislation regarding the use, storage or disposal refrigerant
No storage, handling or management
of refrigerant necessary on site
Low maintenance and life cycle cost
Operation at high ambient temperatures and under
exceptionally severe conditions (no high pressure load switch off)
High level of comfort assured by continuously
speed-controlled air cycle machine
The only alternative to chemical refrigerants
with real and proven in-service experience
No need for trained and certified
(e.g. 303/2008) refrigerant personnel for maintenance
Reduced parts count and simplified
accessibility/replacement
Reduced vehicle downtime
Acquisition
Weight Other Cost (direct and indirect
cost of train downtime, spares
management and additional
refrigerant operating cost)
Measured in Germany, Climatic Zone II
Refrigerant Obsolescence
Electrical Consumption
0
500,000
1,000,000
1,500,000
2,000,000
2,500,000
0 1 2 4 10 15 20 25 30
cumulative €
years
Life Cycle Cost