How Modules Are Used in Heat Exchangers
All thermoelectric heat exchangers are similar in concept: thermoelectric modules are sandwiched between two surfaces. When DC current is applied, the thermoelectric modules "pump" heat from one surface to the other. The "cold side" of the heat exchanger is designed to maximize cooling within the customer’s equipment. The "hot side" of the heat exchanger is designed to efficiently move heat into another medium. The total heat rejected from the heat exchanger is the sum of the heat removed from the customer’s equipment plus the power supplied to the modules themselves.
Liquid to liquid
Liquid on cold side of the thermoelectric modules is cooled while the heat is rejected into another liquid on the other side. Liquid chillers provide an example of liquid to liquid heat exchangers. The chiller circulates temperature-controlled coolant to equipment and rejects the heat into a facility’s "house water".
Liquid to Air
In liquid to air heat exchangers, liquid is cooled on one side of the thermoelectric modules, while heat is rejected into a finned heat sink with a fan to rapidly dissipate the heat into air. Liquid to air heat exchangers are commonly used for cooling machine tools, lasers, liquid chillers or any type of equipment with a coolant loop where the heat is rejected into air.
Surface to Air
In surface to air cooling (one type of point-of use cooling) thermoelectric modules are located at the point requiring cooling. The heat is rejected into a finned heat sink with a fan to rapidly dissipate the heat into air. Two examples of surface to air heat exchangers are air-cooled cold plates and air-cooled containers. The cold plate could be in contact with electrical components or a container of fluid.
Surface to Liquid
In surface to liquid cooling (one type of point-of-use cooling) thermoelectric modules are located at the required cooling point. The heat is rejected into a liquid heat sink cooled by a facility’s "house water". Direct cooling can be a cost effective and elegant replacement for a remote chiller.
Air to Air
A fan circulates cool air from a finned heat sink inside the area to be cooled. The heat is pumped through the metal wall of the enclosure and rejected to the outside air, again via heat sink and fan. Typical air to air heat exchangers are a common air conditioner and an electronics enclosure cooler.
Air to liquid
In air to liquid heat exchangers, air is chilled on the cold side of the thermoelectric modules, while the heat is rejected into a fluid. A typical air to liquid heat exchanger is an air conditioner where the heat is rejected into water. Another example is an air dehumidifier.
We will optimize all factors to meet each customer’s needs:
- Selecting pre-designed or creating a new design for the heat sinks and cold plates
- Choosing the quantity and type of thermoelectric modules
- Optimizing heat transfer efficiency using our proprietary computer models.