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Solar high-efficiency dual temperature phase-change collector and phase-change material for collector

A phase change material and solar energy technology, applied in the field of solar energy resource utilization, can solve the problem of low utilization rate of thermal energy, achieve the effects of good heat absorption and thermal insulation effect, improve effective utilization rate, and reduce heat loss

Active Publication Date: 2014-04-02
SHANGHAI MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Chinese patent document CN201310178000.6 discloses an energy-storage solar collector, which puts an energy-storage rod filled with heat-storage material inside a glass vacuum heat-collecting tube, the heat-exchanging tube is inside the energy-storage rod, and the flow guide tube In the heat exchange tube, the energy storage rod of this kind of heat collector can only absorb the heat energy from the direct sunlight side, and the heat energy utilization rate is not high
[0005] About the solar high-efficiency dual-temperature phase-change heat collector of the present invention and the phase-change material used for the heat collector, there is no report yet

Method used

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  • Solar high-efficiency dual temperature phase-change collector and phase-change material for collector
  • Solar high-efficiency dual temperature phase-change collector and phase-change material for collector
  • Solar high-efficiency dual temperature phase-change collector and phase-change material for collector

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Embodiment 1

[0046] Please refer to figure 1 , figure 1 It is a schematic diagram of the structure of a solar high-efficiency dual-temperature phase-change collector. The heat collector is provided with several vacuum heat collecting tubes 300 and heat accumulators 400 in parallel, and the heat accumulating bodies 400 are inside the vacuum heat collecting tubes 300 . A compound parabolic concentrator 500 is arranged axially outside the vacuum heat collecting tube 300, and the distance from the vacuum heat collecting tube 300 to the compound parabolic concentrator 500 is equal to the focal length of the concentrator. The compound parabolic concentrator 500 is fixed on the bottom plate 620 . The main water inlet pipe 110 is connected to a plurality of cold water diversion pipes 120 , and the cold water diversion pipes 120 are located inside the heat exchange pipe 130 on the medium temperature side. The medium temperature side heat exchange tube 130 is located in the cavity filled with the...

Embodiment 2

[0054] A high-temperature phase-change material for solar energy efficient dual-temperature phase-change heat collectors, the phase change material contains the following components by weight percentage: 2% to 4.5% of nano-metallic copper, 1% to 2% of dispersant, The balance is erythritol, the dispersant is oleic acid and sodium lauryl sulfate with a weight ratio of 1:1, and the high-temperature phase change material is obtained by mixing all components evenly. Preferably, the weight percentage of nano-metal copper is 4%.

[0055] Prepare each group of high-temperature phase-change material samples according to the weight percentages shown in Table 1:

[0056] Table 1 Composition of each group of phase change materials (% by weight)

[0057] Nano metal copper Dispersant Erythritol sample one 0 0 100 sample two 1 1.5 97.5 sample three 2 1.5 96.5 sample four 3 1.5 95.5 Sample five 4 1.5 94.5 sample six 4.5 1.5 94 ...

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Abstract

The invention discloses a solar high-efficiency dual temperature phase-change collector, which comprises a water inlet header, a guide pipe, a heat exchange pipe, a water outlet header, evacuated collector tubes and heat accumulators, wherein the heat accumulators are arranged inside the evacuated collector tubes, and respectively comprise an intermediate temperature phase-change material filling cavity and a high temperature phase-change material filling cavity to form a dual temperature phase-change system; composite paraboloid condensers are arranged outside the evacuated collector tubes along the axial direction. The invention also provides a high temperature phase-change material, which comprises the following components in percentage by weight: 2 to 4.5 percent of nanocrystalline metal copper, 1 to 2 percent of dispersing agent and the balance of erythritol, wherein the dispersing agent comprises oleic acid and lauryl sodium sulfate in a weight ratio of 1:1. Each heat accumulator of the collector has an intermediate temperature side and a high temperature side, the two sides are filled with phase-change materials in different phase-change temperatures, a pipeline structure for heating cold water sequentially is designed, and the gradient utilization of energy is achieved; energy storage materials, the evacuated collector tubes and the composite paraboloid condensers are combined to greatly improve the effective utilization rate of solar energy.

Description

technical field [0001] The invention relates to the technical field of solar resource utilization, in particular to a solar high-efficiency dual-temperature phase-change heat collector and a phase-change material used in the heat collector. Background technique [0002] Solar energy is an effective renewable new energy, which has the advantages of sufficient, clean, environmentally friendly and safe, and has been more and more developed and applied. not tall. Therefore, efficient use of solar energy, use of excess solar energy during the day for heating at night, use of sufficient solar energy in sunny days for cloudy days, or use of solar energy in summer for heating in winter (seasonal heat storage), requires a certain structure. High-efficiency heat collectors are combined with energy storage systems. [0003] The solar water heaters in the prior art mainly include a heat collector, an insulated water tank, connecting pipes and supports. The disadvantage of this solar w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/24F24J2/34F24J2/12F24J2/05C09K5/02F24S10/40F24S10/70F24S23/71
CPCY02E10/44Y02E10/42
Inventor 章学来赵群志甘伟徐斌罗孝学李春蕾华维三袁园陈旭东孟祥来黄艳王惠惠
Owner SHANGHAI MARITIME UNIVERSITY