Questions About Coolants You Must Know the Answers To
Coolant is a kind of substance that is either in gas or liquid form that’s being used to regulate or reduce temperature of the system. The best coolants you can get is something that have low viscosity, low-cost, chemically inert, non toxic, has high thermal capacity and not promoting or causing corrosion of the cooling system. Some applications need the coolant to be electrical insulator too.
While coolant is typically referred to HVAC and automotive applications, the industrial coolant is much more of a technical as it’s found in heat transfer fluid frequently used for low as well as high temperature for the manufacturing applications. The term is covering cutting fluids at the same time. As for the coolants, it can actually stay on its phase, gaseous or liquid and at times, it undergoes a transition with latent heat which then adds the cooling efficiency. When the latter is used to attain below ambient temperature, it is called automatically as refrigerant.
Air is a very common form of coolant in the market. Air cooling is making use of either forced circulation by using fans or convective airflow or otherwise known as passive cooling. Hydrogen is being used as well for high performance gaseous coolant. Thermal conductivity is higher in comparison to other gases because it has low density and high specific heat density and for that, it’s low viscosity that is a big benefit for systems using rotary machines that are susceptible to windage losses. Currently, many big power plants are using hydrogen cooled turbo generators in their electrical generator.
The inert gases are being used as coolants for gas cooled nuclear reactors. Helium has this low tendency to absorb neutrons and become radioactive. In reality, AGR reactors and Magnox are mixed with carbon dioxide. In regards to sulfur hexafluoride however, this is utilized to insulate and even cool high voltage power systems; to give you examples, it can be switches, transformers, circuit breakers and so on. Whenever there is a need for high specific heat capacity in gaseous form, then expect that steam is what used.
Water is another common type of coolant. The low cost and high heat capacity it has makes it ideal for heat transfer medium. Usually, it’s used with additives similar to antifreeze as well as corrosion inhibitors. Antifreeze solution is made out of suitable organic chemicals oftentimes diethylene glycol, propylene glycol or ethylene glycol in water. A similar coolant is betain but with an exception that it’s manufactured using pure plant juice. The pure de-ionized water is utilized to cool electrical equipment because of its low electrical conductivity.