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Multilayer plate condenser utilizing LNG (liquefied natural gas) cold energy

A condenser and multi-layer technology, applied in the field of multi-layer flat condensers, can solve the problems of large fluctuations in cold energy supply, large thermal stress of equipment, large heat transfer temperature difference, etc., so as to improve utilization rate and enhance turbulence Degree, the effect of increasing the heat transfer rate

Inactive Publication Date: 2015-01-07
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems of large heat transfer temperature difference generated in the process of utilizing LNG cold energy, and the resulting large thermal stress of equipment, large fluctuations in cold energy supply, and low utilization rate, the present invention further provides a cooling system utilizing LNG cold energy. multilayer flat condenser

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  • Multilayer plate condenser utilizing LNG (liquefied natural gas) cold energy
  • Multilayer plate condenser utilizing LNG (liquefied natural gas) cold energy
  • Multilayer plate condenser utilizing LNG (liquefied natural gas) cold energy

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specific Embodiment approach 1

[0035] Specific implementation mode one: combine Figure 1 to Figure 4 , Image 6 , Figure 10 To illustrate, a multi-layer flat panel condenser using LNG cold energy in this embodiment,

[0036] (1) Determine the corresponding length, width, height, plate spacing and plate thickness of the corresponding flat plate condenser according to the design requirements; (2) Determine the filling method and filling method of metal foam in each channel according to the requirements of heat transfer heat and heat transfer rate (3) Select the appropriate intermediate medium for heat exchange with LNG; (4) Select the fluid flow mode (downstream or countercurrent) and the placement of the device (horizontal flow) according to the actual situation. placed or placed vertically). The invention can effectively transfer the cold energy released during LNG gasification to the intermediate medium. In addition, the use of metal foam as filler can greatly increase the heat transfer area between f...

specific Embodiment approach 2

[0045] Specific implementation mode two: combination Figure 5 , Figure 7 to Figure 9 , Figure 11 To illustrate, the difference between a multi-layer flat panel condenser using LNG cold energy in this embodiment and the condenser described in Embodiment 1 is that:

[0046]The flow direction of the gaseous intermediate medium is the same as that of the LNG, that is, the two fluids flow in the same direction.

[0047] The metal foam 6 is partially filled in the gaseous intermediate medium flow channel 1 and the LNG flow channel 2;

[0048] Or the metal foam 6 is only filled in the gaseous intermediate medium flow channel 1 or the LNG flow channel 2 .

[0049] When the metal foam 6 is partially filled in the gaseous intermediate medium flow channel 1 and the LNG flow channel 2:

[0050] The first filling form: the filling form of the metal foam 6 is a continuous equilateral triangle, and the filling volume is half of the volume of a single flow channel.

[0051] The second...

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Abstract

The invention provides a multilayer plate condenser utilizing LNG (liquefied natural gas) cold energy, relates to a multilayer plate condenser utilizing metal foam, and aims to solve the problems of large heat transfer temperature differences caused during utilization of the LNG cold energy and the resulting high equipment heat stress, high cold energy supply fluctuation and low utilization rate. The multilayer plate condenser comprises a heat-insulating layer, a condenser casing and a plurality of middle partition boards. The heat-insulating layer wraps the outer wall of the condenser casing. The interior of the condenser casing is partitioned into a plurality of flow channels by the middle partition boards. The flow channels include LNG flow channels and gas-state intermediate medium flow channels. A gas-state intermediate medium refers to a gas-state secondary refrigerant. The gas-state intermediate medium flow channels and the LNG flow channels are distributed alternately. The gas-state intermediate medium flow channels and / or the LNG flow channels are filled with the metal foam. According to the multilayer plate condenser, the cold energy released during LNG gasification is utilized to condense the intermediate medium, and the condensed intermediate medium can be used as a low-temperature heat source.

Description

technical field [0001] The invention relates to a multi-layer flat condenser, in particular to a multi-layer flat condenser utilizing cold energy of LNG. Background technique [0002] LNG is natural gas that exists in liquid form at low temperatures, and its storage temperature is -162°C. The cooling capacity produced by LNG during gasification is about 840kJ / kg. The traditional gasification process uses seawater as the heat source of gasification, which not only causes a lot of energy waste, but also causes a certain degree of low temperature pollution. Therefore, the recovery of LNG cold energy can not only realize the efficient utilization of energy, but also has very important significance for the protection of the ecological environment by recovering the cold energy in LNG. LNG cold energy can be used for cold energy power generation, air separation, seawater desalination, CO2 liquefaction, food freezing, seafood and agricultural product preservation, light hydrocarbo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B39/04
CPCF25B39/04F25B2339/04
Inventor 徐会金巩亮黄善波罗璇徐明海赵长颖
Owner SHANGHAI JIAO TONG UNIV