A high-efficiency energy-saving heat exchange system utilizing lng cold energy

Abstract

The invention discloses a high-efficiency energy-saving heat exchange system utilizing LNG cold energy, which includes a refrigerator, an LNG cylinder, a heat exchanger assembly, an engine application assembly, a controller, and a measurement sensor assembly; The engine speed signal transmitted by the first temperature sensor, the air temperature signal in the refrigerator transmitted by the first temperature sensor, the LNG temperature signal at the outlet of the heat exchanger transmitted by the second temperature sensor, and converted into the speed signal of the frequency conversion fan for the frequency conversion fan Speed ​​control; when the temperature of the LNG outlet of the heat exchanger is higher than the set value A or the air temperature in the refrigerator is lower than the set value B, the controller controls the frequency conversion fan to stop running; when the controller controls the frequency conversion fan to run, the frequency conversion The speed of the fan increases with the speed of the natural gas engine. The system can reduce the energy consumption of the frequency conversion fan and utilize the cold energy of LNG efficiently and safely.

Description

technical field [0001] The invention belongs to the technical field of refrigerated vehicles, and in particular relates to a high-efficiency energy-saving heat exchange system utilizing LNG cold energy. Background technique [0002] With the development of social economy, the continuous improvement of people's living standards, and the increasing food transportation volume, the role of food cold chain in improving people's quality of life is becoming more and more significant. Refrigerated trucks can be used to transport meat, poultry, aquatic products, fruits, vegetables, dairy products, cold drinks, health food, etc., which can ensure the freshness and non-perishability of food, ensure the health of the people, and reduce food waste. To lower the car refrigerator to the temperature specified in the standard (about -18°C to +5°C, depending on the level of the refrigerated car), it is usually necessary to use an air conditioner. The air conditioner uses electric energy to r...

AI Technical Summary

Problems solved by technology

When the same air volume is used to flush different pipeline parts of the heat exchanger, the air volume will be insufficient for the pipeline with a lower temperature, and it is not conducive to the defrosting and drainage of the surface of the heat exchanger; for the pipeline with a higher temperature For the pipeline, the air volume will be too much, which will increase the energy consumption of the frequency conversion fan

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