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Phase change thermal storage solar water heater

A technology for solar water heaters and solar thermal collectors, applied in the directions of solar thermal collectors, solar thermal storage, solar thermal energy, etc., can solve the problems of inability to transfer solar thermal energy to phase change materials, poor thermal conductivity and flow performance, etc. The effect of volume, low cost and comfortable bathing

Inactive Publication Date: 2010-12-15
JIANGSU HUAYANG SOLAR ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem that the thermal conductivity and fluidity of the existing phase change materials for thermal storage solar water heaters are poor, and the heat energy converted from solar energy cannot be transferred to the phase change materials well.

Method used

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Examples

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Embodiment 1

[0015] Example 1: Phase change heat storage flat solar water heater

[0016] figure 1 The phase-change thermal storage flat-panel solar water heater shown in includes a thermal storage tank 1 and a solar heat collector 16; there is an insulating layer 5 between the inner tank 4 and the outer shell 6 of the thermal storage tank 1, and the thermal storage tank is also provided with Water inlet 10 and water outlet 7. The phase change material 3 is housed in the heat storage tank; the finned tube heat exchanger 12 is arranged in the heat storage tank 1, and the finned tube heat exchanger 12 is provided with a condensation pipe 11 and a water exchange pipe 8, and the finned tube heat exchanger 12 In the heater 12, the condensation pipe 11 and the heat exchange pipe 8 are arranged at intervals; the heat storage tank 1 is also provided with interfaces connected with the condensation pipe—the steam pipe interface and the liquid pipe interface 9, and the two ends of the heat exchange ...

Embodiment 2

[0017] Example 2: Phase change heat storage vacuum tube solar water heater

[0018] Its work process is the same as embodiment 1, and the difference is that the vacuum tube solar heat collector 22 is made of an all-glass vacuum heat collecting tube 21 and a header 23, and a finned metal tube (evaporating end 17) is arranged in the header 23, and the evaporating end The two ends of 17 are connected with steam pipe 16 and liquid pipe 15 respectively. When sunny, the vacuum heat collecting tube 21 in the solar heat collector 22 absorbs solar energy and converts the solar energy into thermal energy, heats the water in the vacuum heat collecting tube 21, and transfers heat to the water filled in the evaporation end 17 in the header 23 The working medium makes the working medium vaporize, and enters the condensation pipe 11 in the heat storage tank through the steam pipe 16, and the condensed liquid working medium flows back to the evaporation end 17 through the liquid pipe 15.

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Abstract

The invention relates to a solar water heater taking a phase-change material as a thermal storage medium, and solves the problem that the conventional phase change thermal storage solar water heater cannot well convert solar energy into heat energy and transfer the heat energy to the phase-change material due to poor heat-conducting property and flow property of the phase-change material. The solar water heater comprises a thermal storage box and a solar thermal collector, wherein the phase-change material and a finned tube heat exchanger are arranged in the thermal storage box; the whole thermal storage box is almost filled with the finned tube heat exchanger; and the thermal collector and the condenser pipe of the thermal storage box are connected through a steam pipe and a liquid pipe. The phase-change material is taken as the thermal storage medium, the thermal storage capacity of the solar water heater is several or more times that of the common solar water heater, and more heat can be stored for cloudy or rainy days; in addition, the volume of the thermal storage box can be greatly reduced, and the solar water heater can be perfectly combined with buildings by adopting a split structure; and the thermal storage box cannot bear pressure, is convenient to manufacture and has low cost, and hot water is discharged in a pressure-bearing mode.

Description

technical field [0001] The invention relates to a solar water heater, in particular to a solar water heater using a phase change material as a heat storage medium. technical background [0002] Existing solar water heaters use water as the heat storage medium, which utilizes the rise in water temperature (sensible heat) to store heat, so the heat storage capacity is very low; and as the water temperature rises, the heat lost is relatively small many. [0003] Therefore, using phase change materials as the heat storage medium of solar water heaters can greatly improve the heat storage capacity of water heaters. Although some patents have also considered the use of phase change materials as thermal storage media for solar water heaters, they have overlooked the fact that these phase change materials have poor thermal conductivity and flow properties, and cannot transfer the heat energy converted from solar energy well. Questions for phase change materials. For example, only...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/34F24J2/32F24J2/30F24J2/20F24J2/05F24J2/24F24J2/00F24S10/30F24S10/40F24S10/50F24S10/70F24S10/95
CPCY02B10/20Y02E10/44F24S60/10F28D20/02Y02E10/40Y02E60/14Y02E70/30
Inventor 黄奎林黄永伟
Owner JIANGSU HUAYANG SOLAR ENERGY
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