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A method for applying prestress to a tube bundle or panel of a photothermal heat absorber

A technology of prestressing and heat absorber, which is applied in the application of prestress of single-side heated photothermal heat absorber, tube bundle or tube panel prestress of photothermal heat absorber, and can solve the problem of large thermal stress and heat absorber Problems such as low peak heat flux, to achieve the effect of easy process control, reliable method and simple operation

Active Publication Date: 2020-12-25
自贡华西能源工业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the inhomogeneity of the energy flux density of the tube bundle or tube panel of the photothermal heat absorber, when the tube bundle is constrained according to the conventional constraint form, great thermal stress will be generated, resulting in a low peak heat flux density that the heat absorber can withstand

Method used

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  • A method for applying prestress to a tube bundle or panel of a photothermal heat absorber
  • A method for applying prestress to a tube bundle or panel of a photothermal heat absorber
  • A method for applying prestress to a tube bundle or panel of a photothermal heat absorber

Examples

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example 1

[0101] The CFD software of this example 1 uses ANSYS Fluent 14.5

[0102] FEA software adopts ANSYS Mechanical 14.5

[0103] This example uses a tube bundle to explain the design method and prestress application method of the prestressed tube bundle or tube panel pre-arched shape of the solar thermal absorber of the present invention. where the allowable stress of the material at the operating temperature [σ] t = 280MPa.

[0104] The design process of the specific pre-arching curve is as follows:

[0105] A Solve the tube bundle temperature field under working conditions

[0106] Specifically, according to the actual heat flux density input and medium flow rate of the tube wall of the photothermal absorber, the temperature field of the tube bundle under working conditions is calculated through the fluid dynamics (CFD) analysis software;

[0107] figure 2 This is the energy-flux density diagram simulated in Example 1 without considering the shape of the tube bundle and th...

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Abstract

The invention provides a photo-thermal absorber tube bundle or tube panel prestress applying method, and belongs to the technical field of prestress applying. The method includes the steps: 1) determining a pre-arching shape curve of a photo-thermal absorber tube bundle or tube panel; 2) performing cold bending on the tube bundle or tube panel according to a shape of the pre-arching shape curve; 3) fixing the cold bent tube bundle or tube panel, and removing residual stress; 4) performing elastic return pressure on the bent tube bundle or tube panel at a prestress supporting point, and enabling prestress supporting point and two end points of the tube bundle or tube panel to distribute on the same straight line in a return pressure manner; 5) fixing the prestress supporting point and the two end points of the tube bundle or tube panel, and generating prestress in the tube bundle or tube panel in an enforced displacement manner to achieve applying of the prestress. According to the applying method, the prestress is applied based on the pre-arching shape curve, the method is simple to operate and reliable, processes are easily controlled, displacement of control points is controlled,so that a target prestress value can be applied, and the prestress requirements of the photo-thermal absorber tube bundle or tube panel are met.

Description

technical field [0001] The invention belongs to the technical field of prestress application, and in particular relates to the application of prestress for single-side heated photothermal heat absorbers, in particular to a method for applying prestress to tube bundles or tube panels of photothermal heat absorbers. Background technique [0002] Solar energy has a bright future as a permanent, clean source of energy. The immediate utilization of solar radiant energy is the focus of current technical research, as a new energy source that can replace conventional energy sources. [0003] Due to the inhomogeneity of the energy flux density of the tube bundle or tube panel of the photothermal heat absorber, when the tube bundle is constrained according to the conventional constraint form, great thermal stress will be generated, resulting in a low peak heat flux density that the heat absorber can withstand . Using the prestress design method can significantly reduce the thermal s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F111/04G06F119/14
CPCG06F30/23G06F2119/06
Inventor 吴岳胜刘训志周家勇
Owner 自贡华西能源工业有限公司
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