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Binary medium solar high temperature heat absorption/storage device

A solar energy and heat accumulator technology, applied in the field of solar high temperature heat absorption/heat accumulator, can solve the problems of lower heat exchange efficiency, less heat storage capacity, less heat storage working medium, etc., so as to improve heat exchange efficiency and reduce occupied space , the effect of reducing heat loss

Inactive Publication Date: 2006-05-24
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this type of heat absorber / regenerator is small in volume, since the heat exchange between the working fluid in the heat exchange tube and the heat storage medium in the annular container must pass through the two-layer wall of the annular container and the heat exchange tube, it will inevitably lead to a The thermal efficiency is reduced; the processing technology is more complicated and the cost is higher; the heat storage medium is less, the heat storage capacity is small, and the heat release time is very short when there is no sunlight

Method used

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  • Binary medium solar high temperature heat absorption/storage device
  • Binary medium solar high temperature heat absorption/storage device
  • Binary medium solar high temperature heat absorption/storage device

Examples

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Effect test

Embodiment 1

[0017] For this example, see the attached figure 1 , figure 1 It is a schematic diagram of a heat absorber / regenerator having a frustum-shaped shape and a coil heat exchanger arranged in a spiral arrangement as the heat exchanger 2 . The frustoconical shape conforms to the energy density distribution of the light spot of the concentrator, which can absorb the heat efficiently; the spiral arrangement of the coil heat exchanger 2 increases the length of the tube, increases the heat exchange area, and improves the heat exchange efficiency. The heat absorber / regenerator absorbs the heat of the incident light 6 from the heat absorbing surface 5 coated with a high-quality heat absorbing coating, and transmits it to the heat storage working medium 1, and the heat storage working medium 1 changes from solid to liquid, which is a phase change heat storage ; wherein the regenerative working medium 1 is a molten salt with a melting point above 400° C. for high-temperature phase transiti...

Embodiment 2

[0019] For this example, see the attached figure 2 , figure 2 It is a schematic diagram of a ribbed heat pipe heat exchanger 3 in which the heat absorber / regenerator has a cylindrical shape and the heat exchanger is a ribbed sheet 9 . The cylindrical process is simple and cost-saving; when the heat exchanger is finned, the heat exchange area is increased and the heat exchange efficiency is improved. The heat absorber / regenerator absorbs the heat of the incident light 6 from the heat absorbing surface 5 coated with a high-quality heat absorbing coating, and transmits it to the heat storage working medium 1, and the heat storage working medium 1 changes from solid to liquid, which is a phase change heat storage ; wherein the regenerative working medium 1 is a molten salt with a melting point above 400° C. for high-temperature phase transition; at the same time, the regenerative working medium 1 heats the circulating working medium flowing in from the inlet 7, and the circulat...

Embodiment 3

[0021] For this example, see the attached image 3 , image 3 It is a schematic diagram of the heat absorber / regenerator having a conical shape and the heat exchanger being a U-shaped tube heat exchanger 4 . The conical shape is similar to the light spot energy density distribution of the concentrator, and the process is simple, which saves cost; the heat exchanger is a U-shaped tube, which is convenient to manufacture, simple process, and saves cost. The heat absorber / regenerator absorbs the heat of the incident light 6 from the heat absorbing surface 5 coated with a high-quality heat absorbing coating, and transmits it to the heat storage working medium 1, and the heat storage working medium 1 changes from solid to liquid, which is a phase change heat storage wherein the regenerative working medium 1 is a molten salt with a melting point above 400° C. for phase transition at a high temperature; at the same time, the regenerative working medium 1 heats the circulating workin...

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Abstract

The heat absorber / heat storage includes cavity, heat exchanger, heat absorbent surface, and cycle working-medium inside the heat exchanger. Characters are that the heat absorber / accumulator also includes heat storage working medium. Filled between the heat exchanger and case, heat storage working-medium and the heat exchanger are in same case. Obtaining quantity of heat from heat absorbent surface, the heat storage working-medium stores energy and passes part of quantity of heat to cycle working-medium. The heat exchanger is metal coil pipe in single helix or dual helixes, or heat exchanger of ribbing heat pipe etc. Heat storage working-medium is molten salt of phase change in high temperature. Air, gas or water is adopted as cycle working-medium. Heat absorber / heat storage is in shape of circular truncated cone or taper. Heat absorption coating in high temperature is coated on heat absorbent surface. Features are: low cost and high thermal efficiency.

Description

technical field [0001] The invention relates to a solar high-temperature heat absorber / regenerator, which belongs to the field of solar high-temperature thermal power generation. Background technique [0002] Solar energy is the eternal energy source of the earth. It is rich in resources, the total amount of which is more than 10,000 times that of the energy currently used by human beings. It can be used for free, without transportation, and has no pollution to the environment. It is an environmentally friendly energy. The development of solar energy can well alleviate the current energy crisis that the earth is facing. Solar thermal power generation is the most promising way to utilize solar energy. Solar thermal power generation mainly includes trough type, tower type, and dish type. Its working principle is that the concentrator collects solar energy and reflects it to the heat absorber, heats the circulating working medium, reheats the water vapor, drives the gas turb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/34
CPCF24S20/20F24S60/00F24S60/20F24S60/10Y02E10/40
Inventor 马重芳吴玉庭张丽娜
Owner BEIJING UNIV OF TECH
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