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Heating solar heat absorber based on evaporative cooling

A solar heat absorber and evaporative cooling technology, which is applied to solar heat collectors, solar heat collectors using working fluids, and solar thermal energy. Heater safety and other issues, to achieve the effect of simple design, reliable operation, and improved heat absorption capacity

Inactive Publication Date: 2019-07-19
GUANGDONG FIVESTAR SOLAR ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the uneven heating and flow distribution of the tower heat absorber in the heating water tower solar heat collection system under the complex conditions of high energy flow, large fluctuation, non-uniformity, and small temperature difference, resulting in absorption Heater design dead point, complex control and heat absorber safety issues, provide a heating tower heat absorber scheme based on evaporative cooling and secondary heat exchange to solve heating tower heat absorber design and operation safety issues

Method used

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  • Heating solar heat absorber based on evaporative cooling
  • Heating solar heat absorber based on evaporative cooling

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Experimental program
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Effect test

Embodiment 1

[0021] This embodiment introduces passive evaporative cooling technology as the main heat-absorbing surface of the solar heat absorber, so that the heat-absorbing and water circulation systems are separated, the heat-absorbing surface receives sunlight reflected from the mirror field, and heats the heat transfer work in the heat absorber tube row 2 After the heat transfer medium absorbs heat and undergoes a phase change, it enters the upper steam collecting tank 3, and enters the shell side of the steam / water heat exchanger 6 through the connecting pipe, and condenses in the steam / water heat exchanger to transfer heat to the steam / water heat exchanger. The heated fluid on the tube side of the water heat exchanger 6, the heat transfer working fluid after heat release and condensation returns to the lower liquid collection tank 1 through the connecting pipe, forming a closed cycle. In this embodiment, the phase-transfer heat in the heat absorber tube row 2 is used to reduce the f...

Embodiment 2

[0027] Such as figure 1 As shown, a schematic diagram of a solar heat absorber for heating based on evaporative cooling, which is applied to a tower heat collection system, mainly includes a lower liquid collection tank 1, a heat absorber tube row 2, an upper steam collection tank 3, and a steam / water Heat exchanger 6, main water pump 8 and related auxiliary equipment such as connecting pipelines.

[0028]The heat absorber used in the solar tower collector system for heating based on evaporative cooling disclosed in this embodiment is a secondary loop circulation mode, and on the primary loop side (that is, the evaporative condensation loop) is a passive phase change heat transfer process based on evaporative cooling. On the side of the secondary circuit (that is, the water heating circuit), the heat is transferred to the heating water working medium through the heat exchanger. On the side of the primary circuit, when the heliostat reflects sunlight to the surface of the tube...

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Abstract

The invention discloses a heating solar heat absorber based on evaporative cooling. The heating solar heat absorber applied to a solar tower heat collecting system comprises a tabulation type heat absorber tube bundle, a lower liquid collecting tank, an upper steam collecting tank, a steam / water heat exchanger, a main water pump and a control system. In the heat absorbing system, a heat transfer working medium is closed in a closed space definedby the heat absorber tube bundle, the lower liquid collecting tank, the upper steam collecting tank and the steam / water heat exchanger, the heat transfer working medium absorbs heat transferred by the heat absorber tube bundle, conductsvaporization and feeds the heat into the upper steam collecting tank, the heat transfer working medium enters intoa shellside of the steam / water heat exchanger through a connecting pipeline and is condensed on the steam / water heat exchanger to transfer heat toheated fluid on a pipe side, and the heat-releasing condensed heating working medium returns to the lower liquid collecting tank through the connecting pipeline to form a closed cycle. The connecting pipeline between the heat absorber and the steam / waterheat exchanger needs to be insulated. The heating solar heat absorber solves the problem of the flow rate, hydraulic distribution, flow field control and safety of the tower heat absorber in conditions of a high concentration ratio, small temperature difference and large flow.

Description

technical field [0001] The invention relates to the technical field of heat collection and heating, in particular to a heat absorber for a solar tower heat collection system for heating based on evaporative cooling, and in particular to a heat absorber under small temperature difference and large flow when the tower heat collection technology is applied to heating A solar tower heat absorber based on evaporative cooling reactive cycle and secondary loop cycle. Background technique [0002] Large-scale solar district heating technology is an important development direction of solar heating in the future, and the cost, reliability, and safety of large-capacity solar heat collection systems are important guarantees for the large-scale application of solar heating technology. At present, the main forms of collectors for solar district heating are flat plate collectors and vacuum tube collectors. Considering factors such as user-side temperature comfort, pipe network safety, and ...

Claims

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Application Information

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IPC IPC(8): F24D15/02F24S10/70F24S23/70F24S70/20F28D7/16
CPCF24D15/02F24S10/70F24S23/70F24S70/20F28D7/16Y02E10/44
Inventor 原郭丰王志峰胡广良
Owner GUANGDONG FIVESTAR SOLAR ENERGY
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