Solar thermal power system

A power system, solar thermal technology, applied in solar thermal power generation, mechanical power generation with solar energy, solar thermal devices, etc., can solve problems such as power loss, increased energy loss, wear and heat transfer efficiency, etc. Effect of heat loss and stable performance

Active Publication Date: 2014-12-17
中科中蓝能源科技(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing technology involving the application of sand for heat storage, more attention has been paid to the design of the particle heat absorber, but little is involved in how to efficiently transfer the large amount of heat stored in the high-temperature particles to the working medium. For highly discrete and discontinuous high-temperature fluidized particles, how to overcome wear, how to ensure stable and efficient operation, how to improve heat transfer efficiency, and how to overcome the local ove

Method used

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Examples

Experimental program
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Effect test

Example Embodiment

[0045] Example 1

[0046] figure 1 Shown is Embodiment 1 of the solar thermal power system integrating particle heat absorption, heat storage, and direct contact heat exchange of the present invention. The solar thermal power system in this embodiment includes a particle heat absorption unit, a particle heat storage unit, a direct contact superheated steam generation unit, and a steam power unit. The solar heat absorption unit includes a set of solar mirror field 2, a set of particle heat absorption device 3, a solar tower 4, a particle lifting device 18 and a small particle circulation lifting device 19; the particle heat storage unit includes a high temperature particle storage Tank 5 and a low-temperature particle storage tank 10; the direct contact superheated steam generation unit includes two high-temperature particle pre-storage tanks 6, 7, a superheated steam generator 8, a low-temperature particle pre-storage tank 9, and a set of high-temperature particle switch valves ...

Example Embodiment

[0056] Example 2

[0057] In a large-scale generator set, in order to improve the overall power generation efficiency of the system, the outlet steam of each stage of the turbine needs to be reheated to a temperature close to the inlet steam, and then input to the next stage of turbine to do work. figure 2 Shown is Embodiment 2 of the solar thermal power system of the present invention, which is an improvement of Example 1. At least one steam reheat pipe 20 is added to the top of the superheated steam generator 5, and the low temperature steam at the outlet of each stage of the turbine re-enters the reheat pipe Exchange heat with the high-temperature steam / particle mixture on the top of the superheated steam generator 8, and the reheated high-temperature steam enters the next-stage turbine to perform work.

Example Embodiment

[0058] Example 3

[0059] image 3 Shown is Embodiment 3 of the present invention-a solar thermal power system, which is a variation of Example 1. The large-volume high-temperature particle storage tank that stores a large amount of particles is not set above the high-temperature particle pre-storage tank, but is buried under the ground. The high-temperature particles are lifted by a particle lifting device 21 to the high-temperature particle pre-storage tanks 6, 7 and fall down. . In a system with large power generation, the volume of the high-temperature particle storage tank required will be very large. After the heat storage is completed, the high-temperature particle storage tank filled with high-temperature particles has a very large mass. The suspended high-temperature particle storage tank is for engineering construction and Operation and maintenance cause great problems, and the design of burying the high-temperature particle storage tank in the ground avoids these prob...

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Abstract

The invention relates to a solar thermal power system. The system, which is integrated with particulate heat absorption, heat storage and direct contact heat exchange, comprises a particulate heat absorption unit, a particulate heat storage unit, a direct contact type superheated steam generation unit and a steam power unit. In the operation process of the system, heat storage particles first absorb solar radiation heat energy in the particulate heat absorption unit to become high-temperature heat storage particles, the high-temperature heat storage particles are stored in the particulate heat absorption unit under atmospheric pressure, the high-temperature heat storage particles drop under gravity into the high-pressure direct contact type superheated steam generation unit to generate high-pressure superheated steam, and the superheated steam is inputted into the steam power unit after passing through a buffer tank and a pressure regulation valve. The solar thermal power system can store heat energy in a large capacity under atmospheric pressure and directly generate high-pressure superheated steam for outputting power to the outside, has the characteristics of simple structure, high stored heat temperature, low cost and the like, and is particularly suitable for the development of high-power, high-efficiency, high-temperature and low-cost new-generation solar thermal power generation systems.

Description

technical field [0001] The invention relates to the field of medium and high temperature heat storage and solar thermal power, and relates to a solar thermal power system, in particular to a system which integrates heat absorption, heat storage and direct contact heat exchange of particles, and utilizes heat storage particles to absorb and converge solar radiation heat energy The solar thermal power system, which is stored at low pressure and directly contacts heat exchange with high-temperature particles and deoxygenated water to generate high-pressure superheated steam for external output power, is especially suitable for the new generation of solar thermal power generation technology with high heat storage temperature, high efficiency and low cost. Background technique [0002] Solar thermal power technology uses the mirror field to reflect and converge solar radiation to heat the heat-absorbing medium, and transfer the heat stored in the heat-absorbing medium to the worki...

Claims

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Application Information

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IPC IPC(8): F03G6/06F24J2/34
CPCY02E10/46
Inventor 林曦鹏王亮陈海生谢宁宁
Owner 中科中蓝能源科技(北京)有限公司
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