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Our ambient liquid cooling systems are very energy-efficient systems for removing heat. Unlike compressor- or thermoelectric-based cooling systems there is only a pump and fans that need to be powered. These systems are the ideal solution whenever ambient temperatures are low or the heat source accepts temperatures above ambient such as CPUs or power electronics.
Our series of turbo compressor recirculating chillers operate in the ambient cooling, i.e. free cooling mode most of the time all year long, only during hot summer days the compressor is powered on. In the free cooling mode, EER (Energy Efficiency Ratio in W/W) values of up to 50 can be reached. Our turbo compressor recirculating chillers are available with very high cooling capacities of 35 kW, 45 kW and 120 kW.
Our compact liquid cooling systems against ambient air are the ideal solution where heat loads of 1 kW to 4 kW need to be removed and coolant temperatures of 10 K to 30 K above ambient temperature are acceptable. The systems consist of high-performance finned heat exchangers, a reservoir and a fan as well as a pump, both operated from mains AC voltage.
The copper tube heat exchanger versions are suitable for water as coolant, the all-aluminum heat exchanger versions for oil and brines. These cooling systems’ specific performances range from 50 to 125 W/K, i.e. cooling capacity per degree initial temperature difference, which is defined as the difference between hot coolant temperature and cold ambient air temperature. A variety of positive displacement and centrifugal pumps are available.
Related Products
Beyond ambient cooling systems, AMS Technologies provides a broad range of ready-to-use recirculating chillers, based on thermoelectric or compression technology and featuring precise temperature control, quiet operation and high reliability, as well as other liquid to air thermal management solutions, using water or water-glycol mixtures for heat transfer.
A liquid cooling development platform based on compressors is available from AMS Technologies in different performance levels up to 500 W as a base for customized liquid-to-air cooling solutions. Consisting of a sealed vapor compression circuit with compressor, heat exchanger coil as condenser, plate liquid to liquid heat exchanger as evaporator and interface to the liquid cooling circuit, these kits contain all necessary components on the refrigerant side. For customer projects, the user just needs to select and add a suitable fan and set up the liquid cooling circuit including the pump.
Liquid-cooled cold plates are an important component for removing heat from heat sources like lasers or power electronics. A broad range of cold plate technologies is available from AMS Technologies, covering most fluid compatibility and performance requirements. Our press-lock tubed cold plates and flat tube cold plates are ideal for tap or de-ionised water, while friction stir welded (FSW) types are suitable for glycol-water and very high cooling needs.
AMS Technologies’ liquid to liquid thermal management assemblies provide cooling solutions for very high thermal loads like large power electronics or energy storage systems. For lower heat loads not requiring direct thermal contact, have a look at AMS Technologies’ air-to-air thermal management assemblies providing solutions to remove heat from the air inside cabinets, enclosures, consoles and battery packs or to cool reagents and drugs in analytical and life science applications.
Definition
Your cooling application requires precise temperature control? You want to cool your system to a temperature lower than the ambient air temperature? If your answer to both questions is "no", all you need is a cooling system that simply removes excess heat as efficiently as possible – and ambient cooling systems offer particularly cost-effective solutions.
An ambient cooling system combines tank, pump, heat exchanger and fan in one compact unit. The cooling liquid is circulated by the pump in a closed circuit – to and through the component or device to be cooled and from there back through the heat exchanger.
In the device to be cooled (heat source) the cooling liquid collects the excess heat, and in the heat exchanger (heat sink) this heat is then released into the ambient air. The fan ensures good heat transfer from the heat exchanger’s cooling fins to the moving ambient air. As a "passive" cooling unit, an ambient cooling system does not allow precise temperature control, and the minimum exit temperature value for the cooling fluid is limited by the ambient temperature as the final heat sink.
At first glance, ambient cooling systems appear simple, but they are usually optimally designed by the manufacturer for maximum cooling performance. For example, the flow rates of cooling liquid on one hand and ambient air on the other are precisely matched to get the maximum cooling performance out of the system. All components of the liquid path are designed for a long service life, and the materials that come into contact with the liquid are carefully selected to avoid galvanically induced corrosion problems.
Alternative Terms: Ambient Air Temperature Cooling; Passive Cooling System
