A heat transfer fluid is a gas or liquid that is used to transfer heat from one place to another.

The fluid can be either a gas or a liquid, and it must be able to change states from one to the other.

In order to work as a heat transfer fluid, the substance must have a high specific heat capacity and a low thermal conductivity.

Types Of Heat Transfer Fluids

There are lots of heat transfer fluid types, and each has its own unique properties:

  • Water.
  • Synthetic oil.
  • Molten salt.

Water

The most common type of heat transfer fluid is water. Water has a high specific heat capacity and a low thermal conductivity, making it an ideal heat transfer fluid.

Synthetic oil

Synthetic oil is exactly what it says on the tin: an oil that has been artificially created.

Synthetic oils are designed to have specific properties that make them ideal for use as heat transfer fluid.

Molten salt

Molten salt is another type of heat transfer fluid. Molten salt is a mixture of two or more salts that have been melted down into a liquid form.

The molten salt is then used to transfer heat from one place to another.

Properties Of Heat Transfer Fluids

Viscosity, density, thermal conductivity, and specific heat are all physical factors that influence heat transfer fluid performance.

To put it another way, a fluid can be regarded as a conveyor belt for heat or an endless conveyor belt of buckets with units of heat contained within.

The viscosity

The viscosity of a substance is the degree to which it resists flow. The higher the viscosity, the greater the resistance to flow.

The density

The density of a fluid is a measure of its mass per unit volume. The higher the density, the greater the mass of the fluid.

The thermal conductivity

The thermal conductivity of a fluid is the rate at which heat may be conducted. The greater the thermal conductivity, the better a fluid conducts heat.

The specific heat of a fluid is a measure of its heat capacity. The higher the specific heat, the greater the amount of heat that can be stored in the fluid.

Heat Transfer Fluid Uses

There are a few different ways in which heat transfer fluids can be used:

  • Asphalt processing and storage.
  • Gas to liquid.
  • Natural gas purification.
  • Oil and gas processing.
  • Refining.

Oil and gas processing

The heat transfer fluid is used to transfer heat from the process equipment to the cooling water.

Natural gas purification

The heat transfer fluid is used to remove impurities from natural gas.

Refining

The heat transfer fluid is used to remove impurities from crude oil.

Asphalt processing and storage

The heat transfer fluid is used to keep asphalt hot during processing and storage.

Gas to liquid

The heat transfer fluid is used to convert natural gas into liquid form.

Thermal oil

Thermal oil is a type of heat transfer fluid that is made from synthetic oil. Thermal oil has a high boiling point and a low freezing point, making it ideal for use in high-temperature applications.

Thermal oil is used in many different industries, including the food, pharmaceutical, and chemical industries.

FAQs

What is the best heat transfer fluid?

Water, because of its high heat capacity and thermal conductivity, is an excellent choice for liquid cooling systems. It’s also compatible with copper, which is one of the ideal heat transfer materials for your fluid path.

What is therminol 55?

Therminol 55 is a heat transfer fluid with excellent performance that can be used in a wide variety of different applications. It is such a great option in high-temperature environments since it has a low freezing point and a high boiling point.

What is propylene glycol?

Propylene glycol is a synthetic liquid that absorbs water. It’s frequently used in food manufacturing and cosmetics. It’s also utilized in heat and cooling systems as an antifreeze.

What is the difference between water and glycol?

Water has a higher heat capacity than glycol, meaning it can store more heat. Glycol, on the other hand, has a higher thermal conductivity, meaning it transfers heat more efficiently.

About the Author

Passionate about helping households transition to sustainable energy with helpful information and resources.

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