Refrigerant phase transformation-free refrigerator for recovering liquefied natural gas (LNG) cold energy

A liquefied natural gas, no phase change technology, applied in the field of cold storage, refrigerant no phase change cold storage, can solve the problems of high gas flow rate, difficult control, large pipeline volume, etc., to achieve the effect of easy control

Inactive Publication Date: 2010-01-06
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since this process involves a gas-liquid phase change process, the specific volume of the intermediate refrigerant varies greatly, the volume of the gaseous part of the pipeline is large, the gaseous flow rate is high, and the control is difficult, and the cold energy is only used once in a single cold storage.

Method used

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  • Refrigerant phase transformation-free refrigerator for recovering liquefied natural gas (LNG) cold energy

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing, the concrete implementation that cold storage of the present invention is used for tuna and general fish and shrimp cold storage is described further.

[0022] Such as figure 1 As shown, the present invention includes: LNG storage tank 1, LNG cryogenic pump 2, first LNG flow valve 3, first LNG vaporizer 4, second LNG flow valve 5, LNG-refrigerant heat exchanger 6, second LNG Vaporizer 7, refrigerant flow valve 8, first cold storage fan 9, first cold storage heat exchanger 10, second cold storage fan 11, second cold storage heat exchanger 12, third cold storage fan 13, third cold storage heat exchanger 14. Refrigerant cryogenic storage tank 15, cryogenic refrigerant pump 16.

[0023] The LNG storage tank 1 is connected to the inlet of the LNG cryogenic pump 2; the outlet of the LNG cryogenic pump 2 respectively passes through the first LNG flow valve 3 and the second LNG flow valve 5 and the inlet of the first LNG vaporize...

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Abstract

The invention relates to a refrigerant phase transformation-free refrigerator for recovering liquefied natural gas (LNG) cold energy, which belongs to the technical fields of energy saving and refrigeration. The refrigerant phase transformation-free refrigerator for recovering LNG cold energy comprises an LNG storage tank, an LNG cryopump, an LNG carburetor, an LNG-refrigerant heat exchanger, a refrigerator heat exchanger, a refrigerator fan, a refrigerant low-temperature storage tank, a low-temperature refrigerant pump and various flow valves. R410A is selected as refrigerant to sequentially enter all refrigerators after obtaining refrigeration amount from LNG, the refrigerant releases the refrigeration amount step by step, and the step utilization of the cold energy is realized. The refrigerant is run in a complete liquid state in the whole process and does not generate phase transformation in heat exchangers of all the refrigerators; and the refrigeration amount transformation needed by the refrigerators is realized by adjusting the rotating speed of the fan and the flow of the refrigerant. The invention has the obvious effects of saving the energy and reducing the discharge.

Description

technical field [0001] The invention relates to a cold store for recovering and utilizing the cold energy of liquefied natural gas (LNG), in particular to a refrigerant-free cold store for recovering the cold energy of liquefied natural gas and keeping the intermediate refrigerant from phase change, and belongs to the technical field of energy saving and refrigeration. Background technique [0002] Natural gas is one of the three major energy sources and is widely used due to its high efficiency and cleanliness. In order to facilitate ocean transportation, gaseous natural gas is often liquefied to form liquefied natural gas (LNG). The power consumption of each ton of LNG produced is about 850kWh, and LNG will be released during the process of gasification into normal temperature gas at the receiving station and supplied to users. A large amount of cold energy is 830-860kJ / kg. This part of cold energy is usually taken away by seawater or air, which not only causes a huge was...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25D3/10
Inventor 林文胜黄美斌
Owner SHANGHAI JIAO TONG UNIV
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