Liquid Cooling

In today’s complex operating environment, liquid cooling systems are required to dissipate a large amount of heat in a densely packed electronic environment. Maximum operational life is required to keep system maintenance and repair down time to a minimum. Temperature stabilization has especially become critical, as next generation systems require more precise temperature control.

Liquid Cooling Systems (LCS) are self-contained units that recirculate a coolant to a predefined temperature set point. There are two types of liquid cooling solutions.

  • Liquid heat exchanger systems cool the coolant in a liquid circuit to ambient temperature. This system consists of a pump to circulate coolant, a liquid heat exchanger to dissipate heat, and a liquid circuit to transfer coolant from the heat source to the LCS
  • Compressor-based systems (recirculating chillers) encompass a compressor system instead of a liquid heat exchanger assembly. It is used to cool the coolant to well below ambient and dissipate heat to the outside environment

Additional features can easily be included to add temperature control, variable flow control, bypass control, coolant filtration and electronics in order to meet unique attribute requirements.

Laird’s LCS are used in a wide range of healthcare diagnostics & treatment, industrial instrumentation and semiconductor fabrication applications.

Liquid cooling systems are unique to the thermal management market in that they use a coolant to transfer heat. Many engineers are concerned about introducing liquids to their electronics, but if the unit is designed and assembled correctly, it becomes a non‐issue. LCS have several advantages over conventional air cooled systems.

  • High heat pumping capacity
  • High heat flux density
  • Heat routing
  • Rapid cool down
  • Lower noise

Turn-key Capabilities

Often times, the optimal liquid cooling solution ends up requiring a custom configuration. Laird has more than 35 years of experience in the design, manufacture and servicing of custom liquid cooling systems for various high end markets. Our experienced engineering team designs cooling systems that are compatible with water, water‐ glycol, transformer oil, or various corrosion prohibitors. LCS can also be quite complex and require the temperature control of multiple liquid circuits or multiple pressure drop settings in order to accommodate low and high pressure conditions. Laird has experience designing both systems, and can integrate many unique attributes into an LCS, such as:

  • Cooling capacity (up to 200 KW)
  • Variable pump capacity
  • Thermal control of multiple liquid circuits
  • Coolant filtration
  • Variable flow control
  • PID temperature control
  • High temperature stability
  • High Coefficient of Performance (CoP)
  • Durability by hot gas bypass control
  • CFC‐free refrigerants
  • Stainless steel heat exchanger
  • High operational temperatures
  • Flow monitoring
  • Level switching
  • Fault signal potential‐free
  • Maximum pressure limit
  • Custom input/output fittings and housing configuration

Product Portfolio

Liquid Heat Exchanger Systems

Laird offers three types of liquid heat exchanger systems. Standard cooling capacities range from 500W to 5000W. However, custom solutions have been designed to remove up to 40 KW of heat. Standard heat transfer configurations are either Liquid‐to-Air or Liquid‐to-Liquid systems. All systems are designed to operate using either water, water with glycol (antifreeze), or oil as a coolant.

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WL Series, Water Cooled

Water cooled systems are designed to circulate water or a water glycol (antifreeze) mixture and keep the temperature of the coolant at or near ambient. The WL Series is a re‐circulating liquid to air heat exchanger that offers dependable, compact performance by removing large amounts of heat from a liquid circuit. The coolant is re‐circulated using a high pressure pump to assure maximum flow rate. Heat from coolant is absorbed by a radiant heat exchanger and dissipated into the ambient environment using a brand name fan.

  • Cooling to ambient
  • High heat pumping capacity
  • Compact form factor
  • Long life operation

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WW Series, Liquid‐to-Liquid

Liquid‐to-Liquid systems use facility water as a hot side heat dissipation mechanism, which increases the cooling capacity while maintaining form factor. The WW Series systems are designed to operate using water as coolant, while OW Series systems are designed to operate using oil as coolant.

  • Cooling to ambient
  • High heat pumping capacity in smallest form factor
  • Long life operation

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WLK Series, Recirculating Chillers

The WLK Series is a compressor‐based recirculating chiller that offers dependable, compact performance by controlling the temperature of water or water with glycol (antifreeze) in a liquid circuit. The coolant is recirculated using a pump with a high MTBF. Heat from the coolant is absorbed by a durable, compressor-based system and dissipated to the ambient environment. The unit is regulated with an easy‐to‐use digital temperature controller with pushbutton interface. The unit is housed inside a durable sheet metal casing. Standard cooling capacities are available up to 3 KW. However, custom solutions have been designed to remove up to 200 KW of heat.

  • Cooling to below ambient
  • High heat pumping capacity
  • Variable temperature control
  • High temperature stability
  • CFC free refrigerants
  • Long life operation

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