FROM TRADITION TO INNOVATION
IN THE SHELTERING PLANET

MORE THAN 40 YEARS OF CONTINUOUS AND GROWING EFFORTS AND FULFILLMENTS IN THE EQUIPMENT HOUSING FIELD ALLOWED CELANTEL TO GUARANTEE:

• A product portfolio to satisfy any project requirement and application with Shelter and Cabinet .
  ・Passive, Semi-passive, Water-based, PCM-based, Active, Vented and Conductive, Framed Container Type.
  ・Reinforced Fiberglass (FRP or GRP), Metallic, Overground & Underground, NavAid (frangible).
  ・Fire retardant , Fire resistant, Atex, Soundproof, Pressurized.
  ・Battery housing.
  ・Different configurations of indoor and outdoor server rack (19”, ventilated, etc.)
• An integrated turnkey product (complete package) according to the customer specifications (MR) and contractual documentation.
• Customer support in all the stages of the supply, from the technical inspection to the engineering design by means of detailed drawings in Autocad.
• 30’000 m2 of manufacturing site, 15.000 m2 indoor, with Climatic chamber for thermal tests up to +60°C.
• A continuous production process optimized to coop with the most demanding delivery requests.
• Air conditioning Consultancy Service and custom prototypes development.
• Installation and commissioning field assistance.

Engineering, Project Management & Manufacturing site

From small cabinet to big shelters turnkey solutions

Celantel S.r.l. was established in 2000 by Enzo Celant as a continuation of a bet, which began more than forty years ago, focused in the field of the passive air conditioning of electronic equipment housings.
This continuous path enabled Celantel to face the most various problems introducing innovative and completely new solutions, as the passive cooling, in order to complete the most challenging projects arising in the market, starting from BAM project USSR (arctic shelter) and Ford Project Morocco(desert shelter).
The Company, with management and engineering offices in Vimercate (MB), can rely on a staff of 12 experts: ex-colleagues with proven ability and high competences. Whereas the manufacturing and testing activities are performed in two different sites: Parma for the actively and passively cooled shelter and Carnate (MB) for the racks and the metallic passive cabinets.
Celantel trusts, for its future, on the results of the research activities, engaging significant resources to the achievement of ambitious goals. All Celantel passively cooled products are patented. To date, Celantel has manufactured and supplied more than 1.000 shelter for the Middle East, Africa and Australia geographical areas.

The idea of the Passive Shelter - Reliability and Advantages

The idea for this invention arose, during the 70’s, from the staff of Mr. Celant in Telettra, to face the necessity to provide the remote telecommunication stations of air conditioning systems that did not need any extra electrical power in addition to the one assigned to the equipment.
This brought to the development and the realization of devices, integrated to the shelter, able to transfer outside the heat generated inside the equipment housing, without energy consumption and maintenance, granting and increasing of the whole reliability.
Following this trail, Celantel has developed and implemented projects that allowed to increase their performances and their ease use, with a consequent impact on the costs and the application fields range.

	No energy consumption, necessary for the air conditioning, (or highly reduced).
	Considerable increase of the global reliability due to the absence of mechanical moving parts and fluids under pressure. No maintenance required thanks to the sealed and "elastic" hydraulic circuit, refills free.
	The devices are housed in a room without direct air entrance and with a temperature control without sudden jumps.

Passive cooled cabinet & Passive cooled Shelter.

 

Operating criteria - The Thermal Diode and the Thermal Condenser

In order to make the air conditioning independent from any energy source, it is unavoidable to draw to the energy made available by the environmental climatic conditions. As a matter of fact the passive system employs the thermal energy available during the night, moving and collecting it inside and releasing it during 24 hours.
Celantel uses a patented device having two peculiarities: it is perfectly sealed so that it doesn’t need any refilling during the operational stage and it is modular type. A fluid is employed as thermal vector and store function.
Every passive shelter is divided into two stages:
-The tank/Internal heat exchanger.
-The external heat exchanger.

The tank/internal heat exchanger has the function to control the internal thermal energy and thanks to a suitable accordion shape and a position, that is functional to the thermal flows, allows the expected heat absorption. In certain circumstances, the store function is integrated by adding specific products i.e. Phase Change Materials (PCM).
Typically positioned on the top of the shelter or at the top of the cabinet, such as to make easier the cleaning, the external heat exchanger is configured in order to maximize the heat exchange through the conduction toward the environment and through the radiation toward the outer space, introducing in this way a nocturnal sub cooling effects.

The passively cooled shelter follows the operational procedures of a diode (thermal), allowing the internal heat transfer toward the external and not vice versa.
DIURNAL PHASE
The heat generated by the internal systems, added up to the contribution due to the environmental stress, is accumulated in the tank through the internal tank/exchanger, warming in this way the liquid stored inside.
NOCTURNAL PHASE
The fluid inside the external exchanger cools down, starting the circulation process in the closed circuit (natural convention), till its complete regeneration.

Project Criteria

The calculation method is essentially based on the difference between the minimum external night temperature and the maximum inside temperature allowed by the electronic devices.
This calculation uses a complex algorithm developed by Celantel that, depending on the specific temperatures of the concerned places, which are certified by the global databases, or according to the project requirements, it allows an accurate evaluation of all the manufacturing parameters of the passively cooled shelter, providing the graphics of the performance expectations.