LNG cold energy cascade utilization of refrigerated trucks for power generation

Abstract

The invention relates to a refrigerator truck generating electricity through LNG cold energy gradient utilization. The refrigerator truck generating electricity through LNG cold energy gradient utilization comprises a refrigerator truck body, a refrigeration compartment arranged on the refrigerator truck, an air duct communicating with the refrigeration compartment and an LNG storage tank used for refrigerating the refrigeration compartment and further comprises a primary organic Rankine cycle electricity generating system and a secondary organic Rankine cycle electricity generating system. The primary organic Rankine cycle electricity generating system comprises a primary vaporizer, an air evaporator, a first working medium pump and a first expansion machine. The secondary organic Rankine cycle electricity generating system comprises a secondary vaporizer, an engine cooling radiator of the refrigerator trunk body, a second working medium pump and a second expansion machine. The LNG storage tank communicates with the primary vaporizer. The engine cooling radiator is arranged to correspond to a cooling water system of the refrigerator trunk body. The refrigerator trunk generating electricity through LNG cold energy gradient utilization further comprises a heat exchanger. An inlet of the heat exchanger communicates with the primary vaporizer. An outlet of the heat exchanger communicates with the secondary vaporizer. The refrigerator trunk generating electricity through cold energy gradient utilization has the beneficial effects of saving energy and being environmentally friendly and capable of reducing operation cost.

Description

technical field [0001] The invention relates to a refrigerated vehicle for power generation by cascaded utilization of LNG cold energy, belonging to the technical field of refrigeration. Background technique [0002] With the rapid development of my country's economy and the continuous improvement of people's living standards, the role of food cold chain in improving people's quality of life is becoming more and more significant. [0003] LNG refrigerated vehicles are low-temperature transport vehicles that use liquefied natural gas (LNG) as the power fuel and use the cold energy released during the vaporization and heating process of LNG to refrigerate. That is, in LNG refrigerated vehicles, LNG is both fuel and refrigerant. As a vehicle fuel, it has the characteristics of high energy storage density, light vehicle load, high combustion calorific value, long continuous driving mileage, and high safety performance. It has become a green vehicle alternative fuel with great de...

AI Technical Summary

Problems solved by technology

However, the surface temperature of the heat exchanger is too low, and the moisture, carbon dioxide and other components in the air are easy to freeze, which increases the heat transfer resistance of the heat exchanger surface, reduces the heat transfer effect, and even fails to work normally.

Moreover, the huge heat transfer temperature difference will cause a large amount of irreversible losses, greatly reducing the recycling rate of LNG cold energy

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