There are many kinds of coolant, which are mainly classified according to physical components, but rarely classified according to temperature.Usually, temperature is only an important parameter in model selection. The minimum freezing point temperature of commonly used coolant is generally -40 ℃, and the lower temperature can be defined as ultra-low temperature.And this temperature range is quite broad -40~-145 ℃.-40~-60℃In application, it can be divided into several lower levels. The optional models in the temperature range of -40~-60 ℃ are mainly LM-8 and LM-11.
LM-8 has no flash point and is non-toxic, which is more suitable for immersion freezing or some low-temperature material treatment, while LM-11 has a relatively high flash point, which is suitable for some thermostatic water tanks or industrial applications. This temperature range is applicable to more.-60~-100 ℃, which is a relatively low temperature range, is suitable for scientific research and laboratories.
LM-1/LM-6/LM-14 have different models to choose from. LM-1 and LM-6 have flash points. When using, the system needs explosion-proof design. In addition, the coolant itself is toxic, and personnel should avoid contact during operation.
LM-14 is non-toxic and has no flash point, but the price is relatively expensive. It is a good choice for small experimental systems.In the temperature range of -100~-145 ℃, it is less applicable.
Generally, liquid nitrogen or liquefied gas gasification is used in industries to achieve low-temperature control, but some industries need stable temperature control and continuous operation. Coolant is an ideal choice, and the selection range of coolant in this temperature range is relatively small. LM-6 series models can be as low as -145 ℃.Ultra low temperature coolant is still a relatively wide range, and it is necessary to make an overall selection of the physical properties, toxicity and flash point of the coolant according to the applicable place. In some special processes, an overlay system between the coolant is also required, which makes the coolant into multiple cycles and then superimposes.
At present, there is little research on the application of ultra-low temperature coolant. Glacier Coolant will independently build an Engineering Application Laboratory of ultra-low temperature coolant.