Different Uses of Industrial Coolants
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. Few of the best coolants that can be used are those that are of high thermal capacity, non toxic, chemically inert, low cost, has low viscosity and neither causing or promoting corrosions to the cooling system. Some of its applications require the coolant to be electrical insulator as well.
While the phrase coolant is referred often to HVAC and automotive applications, industrial coolant is more of a technical as it’s found in heat transfer fluid that are frequently used in low and high temperature manufacturing applications. At the same time, the term is used to cover cutting fluids. Coolants may stay on its phase, gaseous or liquid or, it may undergo a transition with latent heat adding to efficiency of cooling. When the latter is utilized for achieving below ambient temperature, it’s automatically called as refrigerant.
Air is a very common form of coolant in the market. There are a couple of ways to which air cooling is used and it’s through passive cooling or also known as convective airflow as well as forced circulation by making use of fans. For the high performance gaseous coolant, hydrogen is what being used most of the time. Because thermal conductivity is higher in comparison to other gases, it is expected to have low density and high specific heat density allowing it to have low viscosity which many rotary machines are taking advantage of due to its vulnerability to windage loss. The hydrogen cooled turbo generators are at the moment most widely used electrical generator in big power plants.
The inert gases are being used as coolants for gas cooled nuclear reactors. Helium basically has low tendency to absorb neutrons and for that, the odds of it becoming radioactive is less. In reality, AGR reactors and Magnox are mixed with carbon dioxide. On the other hand, sulfur hexafluoride is used to cool and insulate some high voltage power systems like switches, transformers, circuit breakers and so on. Steam can also be used where there is high specific heat capacity required in gaseous form.
A very common type of coolant is water. The low cost and high heat capacity it has makes it ideal for heat transfer medium. Most of the time, technicians are combining it with additives like antifreeze as well as corrosion inhibitors. In most cases, diethylene glycol, propylene glycol or ethylene glycol mixed in water is the components of antifreeze. Betain however is made using pure plant juice but is likely similar with water coolants. Because of the low electrical conductivity of pure de-ionized water, it’s widely used for regulating the temperature on electrical equipment.