Cold Plate - L.D.S. System

Cold Plate
The use of water-cooled heat sinks is becoming increasingly common in response to the need of
dissipating high power in small spaces and without the use of fans with high air flow. In fact, the
water, in virtue of a specific heat much higher than air, it is far more effective as a vector fluid in
removing heat from a warm body. A small pump allows the circulation of fluid which must be cooled through a heat exchanger, a remote heat sink or air-cooled by means of a refrigerating unit.
The heat sink plates which are water-cooled find their ideal application whenever it is in the presence of high power and where the thermal load is localized.
PATENTED
There are many fields of use of this type of technology:
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Power electronics
Continuity groups
Electromedical equipment
Industrial equipment of various kinds, such as laser or machines for the production of
semiconductors-trains and transport in general
• Equipment for military use
• Radio transmitters
PAG. 1
Cold Plate
Constructive typologies
A.
Pipe Cold Plate
A continuous tube of copper, aluminum or stainless steel is inserted inside a
machined plate of aluminum or copper on which the power component will
then be set.
The peculiarity of the system is that the holes for the fixing screws do not
have rigid constraints of neither position nor of depth and can be made on
both sides
of the heat sink.
There can be two versions of the heat sink, one with the sight tube and the
other with a drowned tube.
B.
Perforated Plates
A very thick plate is perforated in order to create inside it a guided path for the refrigerant
fluid; the holes are then closed on the outside
thanks to screw caps.
C.
Modular systems “Flex-Fluid”
These systems are manufactured by assembling together more extruded profiles inside which there is already the channel circulation of the cooling fluid; during the assembly phase the transverse
holes necessary to define the path
of the refrigerant fluid are then
made. The advantages are a wide
range of customization at a lower
cost as they are made with modular
systems “Flex-Fluid” 1/4 “standard
components and weight exchangers lower than those made by full
plate.
The only limitations are given by
the height of the profile and from
the pitch of the base module.
PAG. 2
Cold Plate
Modular systems “Flex-Fluid”
Modello 1
PATENTED
The system is flexible because it allows to obtain from small sizes to sizes up to 600 x 600 mm.
Upon request, the fluid circuit can be developed in different ways.
The system is composed of aluminum tubes assembled with a press.
The voltage is provided by the o-ring and the pressure exerted.
Technical Data:
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Coolant temperature: 45°C
Max temperature of the cold plate: 70°C
Maximum water inlet and outle: 7°C
Water flow: 10 l/m
Rth=0,005°C/W
Pressure = 0,7 bar
Power: 5000 W
PAG. 3
Cold Plate
Modello 2
PATENTED
The system is flexible because it allows to obtain from small sizes to sizes up to 600 x 600 mm.
Upon request, the fluid circuit can be developed in different ways.
The system is composed of aluminum tubes assembled with a press.
The voltage is provided by the O-ring and the pressure exerted.
Technical Data:
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Coolant temperature 45°C
Max temperature of the cold plate: 70°C
Maximum water inlet and outle 7°C
Water flow: 10 l/m
Rth=0,015°C/W
Pressure = 0,16 bar
Power: 1600 W
PAG. 4
Cold Plate
Modello 3
PATENTED
The system is flexible because it allows to obtain from small sizes to sizes up to 600 x 600 mm.
Upon request, the fluid circuit can be developed in different ways.
The system is composed of aluminum tubes assembled with a press.
The voltage is provided by the O-ring and the pressure exerted.
Technical Data:
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•
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Coolant temperature: 45°C
Max temperature of the cold plate 70°C
Maximum water inlet and outle: 7°C
Water flow: 10 l/m
Rth=0,069°C/W
Pressure = 0,24 bar
Power: 3600 W
PAG. 5
Cold Plate
Modello 4
PATENTED
The system is flexible because it allows to obtain from small sizes to sizes up to 600 x 600 mm.
Upon request, the fluid circuit can be developed in different ways.
The system is composed of aluminum tubes assembled with a press.
The voltage is provided by the O-ring and the pressure exerted.
Technical Data :
•
•
•
•
•
•
•
Coolant temperature: 45°C
Max temperature of the cold plate: 70°C
Maximum water inlet and outle: 7°C
Water flow: 10 l/m
Rth=0,005°C/W
Pressure = 0,7 bar
Power: 5000 W
PAG. 6
Cold Plate
Complete systems
for heat dissipation with refrigeration unit
All previous systems: Pipe Cold Plate, perforated plates, Flex Fluid modular systems , can be coupled with refrigeration units proposed.
The cost of energy is increasing every year, the global warming treads the eco-system and we
often need to dissipate the heat produced by big electronic devices.
In industrial and office buildings, usually big electronic devices o Data Processing Center are cooled with great chillers that waste energy in the air.
Big electronic devices can be a solution instead of a problem since we can use them as a source of
energy!
If associated with Liquid Cold Plates, special reversible chillers can subtract heat by electronic
devices and use it to heat a building, or to produce Domestic Hot Water; when the heat request is
satisfied the special chiller can automatically dissipate the heat in the air atmosphere or discharge
it into groundwater when it is possible. Ellediesse and Rhoss have developed a special Polyvalent
chiller that have a main cooling circuit, a recovery circuit and a “waste” circuit or a condensing coil
with a fan to dissipate the heat into the air.
The recovered energy can be considered as renewable and so we can reduce the impact of the building on the environment. This solution represents a step toward the integration between electronic and industrial device with the buildings.
Some data:
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With 8 kW you can heat a modern house of about 100 m2.
With 20 kW you can produce all Domestic Hot Water for an 80 beds hospital
In a medium DPC we can need to dissipate 80 kW
A laser can dissipate till to 2 kW
PAG. 7
Cold Plate
Why use a Liquid Cold Plate?
Since fluid can carry thermal energy much better than air, cooling systems with a circulating fluid
have a much bigger heat-sink power that forced or natural convection air dissipated heat-sink.
With a Liquid Cold Plate we can carry away a lot of energy with small dimensions, no air and dust
movement, no noise.
Is it safe, or it can wet the electronic device?
We test every single Liquid Cold Plate at pressure of 8 bar; the best components and materials are
use for the connections and special silicone sealants are use to ensure a perfect seal and possibility to follow the thermal expansion of the plate.
Why use a chiller?
The use of a chiller allows to control the temperature of water circulating in the liquid cooling
circuit so that the electronic component can work at the desired temperature independently from
the outdoor temperature.
Complete cooling system and heat recovery systems.
Ellediesse, thanks to an agreement with an Italian producer of chillers, can offer a complete cooling system with chiller, polyvalent chillers, pump, and all safety accessories. All the chillers can be
air or water condensed on the waste circuit. (*)
(*) Supply is currently being activated
PAG. 8