YORK ® AIR-CONDITIONING PRODUCTS
Focus on Free Cooling
High energy saving air conditioning unit Indirect Free Cooling
Using renewable energy sources is required to reduce the
environmental impact of systems. Our innovative free cooling systems
are able to achieve energy savings of over 50% compared to a
conventional air conditioner. The indirect FREE COOLING system is characterised by a hybrid
unit, consisting of a primary water circuit and a secondary direct
expansion or chilled water circuit. The primary water circuit is
connected to a dry cooler that uses outside air - a source of renewable
energy - to cool water. The secondary circuit on the other hand
exploits the mechanical cooling.
Free Cooling from renewable sources
Using outside air to cool environments is the primary source of
energy savings available in temperate climate areas.
Optimised operating procedures
Depending on the outside air temperatures, three possible operating
procedures are possible:
Total Free Cooling
The unit completely operates
in FREE COOLING without
triggering mechanical cooling.
Mild climate
YORK can now offer a range of FREE COOLING close control air
conditioning units which ensure high energy savings combined with the
efficiency and reliability that distinguish this type of product.
Partial Free Cooling
In addition to operating
the FREE COOLING circuit,
mechanical cooling can be
triggered for the time strictly
necessary to meet the demand
for cooling.
Intelligent energy saving
The high number of hours per year in which FREE COOLING
systems can be used ensures that the air conditioning system energy
consumption can be reduced by over 50%.
This is reflected in an immediate environmental sustainability increase,
thanks to a significant reduction in CO2 emissions, and the system
operating costs.
No Free Cooling
Free Cooling operating hours per year
Amsterdam Athens Belgrade Berlin Brussels
Nbr. hours (1) 5,641 4,491 5,105 5,583 5,545
Percentage (2) 64% 51% 58% 64% 63%
Bucharest Budapest Copenhagen Dublin Helsinki
Nbr. hours (1) 5,503 5,279 5,861 7,161 5,796
Percentage (2) 63% 60% 67% 82% 71%
Istanbul London Madrid Milan Moscow
Nbr. hours (1) 4,779 5,575 4,643 5,281 6,046
Percentage (2) 55% 64% 53% 60% 71%
Oslo Paris Prague Reykjavik Vienna
Nbr. hours (1) 6,202 5,187 5,619 7,743 5,651
Percentage (2) 73% 59% 64% 88% 65%
Regulation is completely
entrusted to mechanical
cooling, excluding the FREE
COOLING circuit.cooling.
Self-adaptive set-point of the dry cooler
In order to maximise the efficiency of the FREE COOLING system, the
unit can handle the regulation of the dry cooler coupled to it directly.
Thanks to the self-adaptive set-point function, the fan speed
can be regulated so that the water always has a temperature
consistent with the outside air conditions.
This leads to an increase in the system efficiency, allowing you to
maximise the performance of both the FREE COOLING circuit and the
direct expansion circuit, ensuring low condensing temperatures. In
addition, the fans of the dry cooler will partially operate even with high
temperatures, thereby increasing the energy savings of the system.
(1) Number of hours with temperatures lower than or equal to 18°C.
(2) Percentage calculated on a total of 8,760 hours per year.
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