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[Chemical Knowledge]：What is Heat Transfer Oil?

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Thermal oil is a heat transfer medium, usually composed of high-boiling organic compounds, used to transfer heat energy at high temperatures. With the continuous improvement of industrialization, the application of heat transfer oil is more and more extensive, including chemical industry, construction, food processing and other fields. This paper will discuss the basic concept of heat transfer oil, oil selection, performance indicators, application areas and so on.

the basic concept of 1. heat transfer oil

heat transfer oil, also called heat transfer oil, is a medium that can transfer heat at high temperatures. Commonly used thermal oils are usually obtained by petrochemical or synthetic chemical methods and consist of one or more high-boiling organic compounds. Heat transfer oil usually has a higher heat transfer coefficient than water and a lower liquid surface temperature, and can transfer heat in a high temperature working environment to achieve heating, cooling and other functions.

2. oil selection

heat transfer oil selection is very important in many applications, so as to ensure the efficiency and stability of equipment operation. Different heat transfer oils have different properties and characteristics, so you need to pay attention to the following points when choosing heat transfer oil.

1. flow performance: heat conduction oil for high temperature and low temperature flow performance and resistance have different requirements. Therefore, according to the temperature requirements of different application environments, the corresponding oil is selected.

2. Density: The density of heat transfer oil affects its heat transfer performance, and oil with different density has different heat transfer performance. Generally speaking, the higher the density, the better the heat transfer performance of the heat transfer oil.

3. Flash point: The flash point of heat transfer oil determines its safety, especially when used in high-temperature heating equipment. The higher the flash point, the better the safety of the heat transfer oil.

3. Performance Index

In order to ensure the stable performance of heat transfer oil, during manufacture, use and service, heat transfer oil should meet the following performance indicators:

1. thermal conductivity: thermal conductivity is a measure of heat transfer performance of heat transfer oil and is also an important index for selecting heat transfer oil. At different temperatures and pressures, the thermal conductivity of heat transfer oil is also different.

2. flash point: flash point refers to the heat transfer oil can flash the lowest temperature. Generally speaking, the lower the flash point, the worse the safety of heat transfer oil.

3. Viscosity: The viscosity of heat transfer oil can affect its flow performance and heat transfer performance. When the relevant pressure and temperature changes, the heat transfer oil should have a stable viscosity.

4. applications

heat transfer oil has important applications in many industrial fields, the most common applications include:

1. Petroleum and chemical industry, mainly used for heating and cooling oil refining and chemical reactors.

2. Textile industry for heating and drying textiles.