Method for controlling steam temperature of outlet of DSG (Direct Steam Generation) trough type solar thermal collector

A trough solar energy and steam temperature technology applied in the field of solar thermal utilization

Inactive Publication Date: 2012-04-25
HOHAI UNIV
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For the research on the control strategy of the outlet steam temperature of the DSG trou...

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  • Method for controlling steam temperature of outlet of DSG (Direct Steam Generation) trough type solar thermal collector
  • Method for controlling steam temperature of outlet of DSG (Direct Steam Generation) trough type solar thermal collector
  • Method for controlling steam temperature of outlet of DSG (Direct Steam Generation) trough type solar thermal collector

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Embodiment Construction

[0054] Below in conjunction with accompanying drawing, the technical scheme of invention is described in detail:

[0055] like figure 1 As shown, its heat collector is composed of several groups of heat collecting tubes. A steam-water separator is installed at the end of the evaporating section of the heat collecting tube group, which structurally separates the superheating section and the evaporating section of the heat collecting tube group. The water supply at the entrance of the evaporation section is greater than the evaporation, and its circulation ratio is greater than 1. The dry saturated steam separated by the steam-water separator enters the superheating section and is heated into superheated steam. A "spray water desuperheating device" is installed at the inlet of the last heat collecting tube group in the superheating section to adjust the steam temperature at the outlet of the heat collecting field. This mode of DSG trough system has high reliability and is mor...

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Abstract

The invention relates to a method for controlling the steam temperature of an outlet of a DSG (Direct Steam Generation) trough type solar thermal collector, belonging to the field of thermal utilization of solar energy. The method comprises the following steps of: dividing a whole nonlinear working space into a plurality of subspaces, describing each subspace by using an accurate fixing model, and designing corresponding sub-controllers specific to the sub-models; and designing a switcher which is used for selecting an output of the corresponding controller of the model best matched with an object as the real controlled quantity of a system. The control method has the advantages of rapid response speed, astable deviation, little fluctuation of system output and reduction of model mismatchinfluence.

Description

technical field [0001] The invention relates to a method for controlling the outlet steam temperature of a DSG trough solar heat collector, belonging to the field of solar heat utilization. Background technique [0002] Direct Steam Generation (DSG) trough solar thermal power generation uses a parabolic trough concentrator to focus sunlight on the heat collecting tube, directly heats the working medium water in the heat collecting tube, and generates steam to drive the turbogenerator to generate electricity system. Compared with the traditional trough power station with heat transfer oil as the working fluid, since no heat transfer oil is used, the oil / steam heat exchanger and other accessories are omitted, and it has the following advantages: instead of heat transfer oil with water, the environmental pressure is reduced; it has higher steam temperature; power station investment has dropped significantly; manufacturing and operating costs have been reduced, and power statio...

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Application Information

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IPC IPC(8): F24J2/40
CPCY02E10/40
Inventor 郭苏刘德有张耀明许昌王沛
Owner HOHAI UNIV
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