At this article, I show my vision on how to:
- determine the value of the heat needs to be rejected from the system;
- calculate and select the right cooler size.
…and will provide an example of cooler calculation and selection.
What is a cooler and what is a heat exchanger?
The hydraulic cooler is one of the heat exchangers type. But, what is a heat exchanger? The best definition of the heat exchanger is:
Heat exchanger is a device that transfers heat between two fluids.
The simple sentence but a very good description, because fluids can be either oil, air, water, etc., and because transferred heat can be for either cooling or heating target.
There are two most popular types of heat exchangers in hydraulic systems:
Plate heat exchangers
This type has the best value of efficiency/reliability and designed for both cooling and heating applications and a very good for low-viscosity fluids. Pairs of plates can be removed individually for maintenance, cleaning, or replacement. Another advantage of the plate is exchangers is their low initial cost, as well as easy and inexpensive operation.
Fan radiators (air-cooled)
This type is the only option where water is unavailable or expensive for a delivery. From benefits: low maintenance and operating costs and the only option for oil cooling in mobile applications.