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Phase change coolant for recycling cold energy of LNG (Liquefied Natural Gas) vaporizing station

A technology of phase-change cold storage agent and gasification station, which is applied in the direction of heat exchange materials, chemical instruments and methods, and can solve problems such as poor flow and refrigerant freezing, and achieve low cost, high phase change temperature, and simple processing technology Effect

Active Publication Date: 2010-09-15
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the freezing point temperature of ethylene glycol is still high, and there is still a risk of refrigerant freezing causing poor flow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Add 10% of dichloroethane, 20% of ether, 10% of ethyl acetate, 25% of ethylene glycol and 31% of deionized water into the container and mix well; then add 4% of dodecylbenzene The compound of sodium sulfonate and trimethylhexadecyl ammonium bromide is added to the above organic solvent, and stirred while adding, until all the reagents are mixed evenly to prepare the cooling agent. The cold storage agent prepared in this way has a phase change temperature of -21°C to -30°C, a phase change latent heat of 256 to 285KJ / Kg, and a phase change solid particle size of 0.6 to 0.8 mm.

Embodiment 2

[0015] Add 20% of dichloroethane, 10% of ether, 20% of ethyl acetate, 10% of ethylene glycol, 6% of chloroform and 32% of deionized water into the container and mix well; then add 2% of The compound of Tween-80 and trimethylhexadecyl ammonium bromide is added to the above organic solvent, and stirred while adding, until all the reagents are mixed evenly to prepare the cooling agent. The cold storage agent prepared in this way has a phase change temperature of -18°C to -26°C, a phase change latent heat of 248 to 283KJ / Kg, and a phase change solid particle size of 0.5 to 0.7 mm.

Embodiment 3

[0017] Add 15% of dichloroethane, 15% of ether, 15% of ethyl acetate, 18% of ethylene glycol, 4% of toluene and 30% of deionized water into the container and mix well; then add 3% of The compound of Span-80, sodium dodecylbenzenesulfonate and trimethylhexadecylammonium bromide is added to the above organic solvent, and stirred while adding until all the reagents are mixed evenly to make a cooling agent. The cold storage agent prepared in this way has a phase change temperature of -23°C to -34°C, a phase change latent heat of 251 to 289KJ / Kg, and a phase change solid particle size of 0.4 to 0.7 mm.

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Abstract

The invention discloses a phase change coolant for recycling cold energy of an LNG (Liquefied Natural Gas) vaporizing station. The coolant consists of dichloroethane, aether, ethyl acetate, ethylene glycol, surfactant and deionized water. Compared with the prior art, the phase change coolant for recycling the cold energy of the LNG (Liquefied Natural Gas) vaporizing station has proper phase change temperature and stronger phase change latent heat, the solidification temperature is 50 DEG C below zero to 5 DEG C below zero, the phase change latent heat is 210 to 300 kJ / kg, and the pipeline coagulation phenomenon does not exist substantially. The coolant has low cost, simple processing technique and high economic value.

Description

technical field [0001] The invention relates to the field of cold storage agents, in particular to a phase-change cold storage agent for recovering cold energy of an LNG gasification station. Background technique [0002] Currently, a domestic 10×10 4 The m3 / d-scale LNG satellite receiving station can release cold energy and convert it into electrical energy of nearly 16,000 kWh per day. Most of this cold energy has not been recycled, and the cold energy utilization of large-scale LNG receiving stations is also designed according to the minimum release of cold energy. A large part of the cold energy is released into the seawater, which is wasted. [0003] In the existing technology, the Chinese patent application number is 00128935.7 "Utilization method of cooling capacity of liquefied natural gas", which uses circulating water as the refrigerant to achieve the purpose of cooling the air conditioner. It is very easy to cause water to freeze during heat exchange and cause f...

Claims

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Application Information

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IPC IPC(8): C09K5/06
Inventor 张锦宝曲顺利张数义仇德朋赵彩云楚晓艳
Owner CHINA NAT OFFSHORE OIL CORP
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