Condenser refrigerating system based on liquid nitrogen

Abstract

The invention relates to a condenser refrigerating system based on liquid nitrogen. The condenser refrigerating system comprises a liquid nitrogen transmission module, a liquid nitrogen evaporation module and a liquid nitrogen exhaust module which are sequentially connected, wherein the liquid nitrogen transmission module comprises a liquid nitrogen Dewar (1) and a liquid nitrogen transmission pipe (2); the liquid nitrogen evaporation module comprises an immersed liquid nitrogen storage device (4) and a liquid nitrogen cold head (5); the exhaust module comprises an exhaust pipeline (8); the liquid nitrogen Dewar (1) and the immersed liquid nitrogen storage device (4) are connected through the liquid nitrogen transmission pipe (2); and the exhaust pipeline (8) is connected to the immersed liquid nitrogen storage device (4). According to the condenser refrigerating system based on the liquid nitrogen, the refrigerating power and temperature can be accurately adjusted within a certain range, the manufacturing cost and energy consumption of refrigerating equipment are reduced, and the long-term use stability of the equipment is improved.

Description

technical field [0001] The invention relates to a condenser refrigeration system based on liquid nitrogen, which belongs to the technical field of cryogenic engineering. Background technique [0002] With the improvement of my country's scientific research level, the demand for high-power refrigeration in the cryogenic temperature zone is increasing, and higher requirements are placed on the accuracy of temperature control. However, due to the limitation of the basic laws of thermodynamics, the lower the cooling temperature, the higher the power consumption, and the volume and price of the refrigerator will increase accordingly. Due to the limitation of site size and equipment cost, the energy consumption and stability problems of high-power refrigerators have been difficult to solve. [0003] In addition to using a dedicated refrigerator for refrigeration, another alternative is to use refrigerants (liquid nitrogen, liquid hydrogen, liquid helium) for refrigeration. Immer...

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Problems solved by technology

However, due to the limitation of the basic laws of thermodynamics, the lower the cooling temperature, the higher the power consumption, and the volume and price of the refrigerator will increase accordingly.

Due to the limitation of site size and equipment cost, the energy consumption and stability problems of high-power refrigerators have been difficult to solve

[0004] However, it is difficult to guarantee the refrigeration effect by simply using the refrigerant, including: the power of refrigeration is difficult to control, the refrigeration temperature is difficult to control accurately, and the temperature range is greatly limited by the refrigerant.

As the pressure in the container changes and fluctuates, the evaporation temperature of liquid nitrogen will also change accordingly. Traditional methods are not suitable for scientific research fields and fine chemical production scenarios that require stable cooling power and controllable cold temperature.

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