Solid-liquid phase change heat exchange working medium for power generation by oceanic thermal energy and preparation method of working medium

A technology of solid-liquid phase transition and temperature difference energy, which is applied in the fields of ocean energy power generation, heat exchange materials, chemical instruments and methods, etc. Efficiency and stable dispersion performance

Inactive Publication Date: 2014-09-24
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the power supply problem of the ocean observation platform has always

Method used

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  • Solid-liquid phase change heat exchange working medium for power generation by oceanic thermal energy and preparation method of working medium
  • Solid-liquid phase change heat exchange working medium for power generation by oceanic thermal energy and preparation method of working medium
  • Solid-liquid phase change heat exchange working medium for power generation by oceanic thermal energy and preparation method of working medium

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Experimental program
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Embodiment 1

[0039] 1. Composition of solid-liquid phase change heat exchange working fluid materials

[0040] Ternary composite material mixture: n-pentadecane, n-hexadecane, n-heptadecane mass ratio 0.8:6:3.2, modifier: expanded graphite with 0.1% of the total mass of the ternary composite material mixture, dispersant: ternary Sodium dodecylbenzene sulfonate of 0.1% of the total mass of the composite material mixture;

[0041] 2. Preparation

[0042] (1) Mix C15:C16:C17 n-alkanes according to the mass ratio to form a ternary composite material mixture;

[0043] (2) Preparation of expanded graphite by high temperature expansion method in muffle furnace

[0044] Use a vacuum drying oven to dry the expandable graphite for 1 hour, take a small amount of dried expandable graphite powder and place it in a ceramic crucible, and then place it in a muffle furnace at a temperature of 600°C to heat and expand for 5 minutes to obtain expanded graphite.

[0045](3) Add expanded graphite and sodium...

Embodiment 2

[0047] 1. Composition of solid-liquid phase change heat exchange working fluid materials

[0048] Ternary composite material mixture: n-pentadecane, n-hexadecane, n-heptadecane mass ratio 0.6:6:3.4, modifier: expanded graphite with 0.2% of the total mass of the ternary composite material mixture, dispersant: ternary 0.2% sodium dodecylbenzenesulfonate of the total mass of the composite material mixture;

[0049] 2. Preparation

[0050] (1) Mix C15:C16:C17 n-alkanes according to the mass ratio to form a ternary composite material mixture;

[0051] (2) Preparation of expanded graphite by microwave high-temperature expansion method

[0052] Due to the conductivity of graphite, graphite will generate eddy current under the action of microwave, which will produce a severe heating effect, causing graphite to expand rapidly, thus forming expanded graphite;

[0053] (3) Add expanded graphite and sodium dodecylbenzenesulfonate in sequence to the ternary composite material mixture, a...

Embodiment 3

[0055] 1. Composition of solid-liquid phase change heat exchange working fluid materials

[0056] Ternary composite material mixture: n-pentadecane, n-hexadecane, n-heptadecane mass ratio 0.6:7:2.4, modifier: expanded graphite with 0.5% of the total mass of the ternary composite material mixture, dispersant: ternary 0.4% sodium dodecylbenzenesulfonate of the total mass of the composite material mixture;

[0057] 2. Preparation

[0058] (1) Mix C15:C16:C17 n-alkanes according to the mass ratio to form a ternary composite material mixture;

[0059] (2) Preparation of expanded graphite by high temperature expansion method in muffle furnace

[0060] Use a vacuum drying oven to dry the expandable graphite for 1 hour, take a small amount of dried expandable graphite powder and place it in a ceramic crucible, and then place it in a muffle furnace at a temperature of 600°C to heat and expand for 5 minutes to obtain expanded graphite;

[0061] (3) Expanded graphite and sodium dodecy...

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Abstract

The invention discloses a solid-liquid phase change heat exchange working medium for power generation by oceanic thermal energy, wherein a ternary solid-liquid phase change heat exchange working medium matrix mixing material is prepared by mixing n-pentadecane (C15H32), n-hexadecane (C16H34) and n-hexadecane (C17H36) at a weight ratio of 6:60:34, and a modifying material with high-thermal conductivity, namely expanded graphite, is added into the mixed material so as to intensify the heat conductive performance. A dispersant, namely organic bentonite, is added into and the dispersion stability of the organic bentonite is improved by ultrasonic oscillation. The solid-liquid phase change temperature range of the solid-liquid phase change heat exchange working medium disclosed by the invention is 14.5-17.5 DEG C, the phase change potential heat value of the working medium is about 212.1kJ/kg and the volume expansion ratio of the working medium is about 8.5%. The material serving as the solid-liquid phase change heat exchange working medium for power generation by oceanic thermal energy can satisfy the basic requirements on solid-liquid phase change heat exchange working medium for power generation by oceanic thermal energy.

Description

technical field [0001] The invention relates to a phase-change heat-exchange material, in particular to a solid-liquid phase-change heat-exchange working medium for ocean temperature difference energy generation and a preparation method thereof, belonging to the technical field of material preparation. Background technique [0002] In recent years, people have paid more and more attention to the development of marine resources, marine scientific research and marine environment detection. Therefore, marine observation platforms and related technologies have developed rapidly. The ocean observation platform has the advantages of simple structure, high work efficiency, wide work area, good concealment performance, and strong battery life. It is the main equipment for obtaining information on marine environmental resources. However, the power supply problem of the ocean observation platform has always been the main bottleneck restricting its long-distance and long-term operation...

Claims

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Application Information

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IPC IPC(8): C09K5/06F03G7/05
CPCY02E10/34Y02E10/30
Inventor 王葛王兵振李强李国道
Owner YANSHAN UNIV
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