Concentrate solar thermal energy electric power plant logic boiler

a solar thermal energy and solar thermal energy technology, applied in boiler control, steam engine plants, lighting and heating apparatus, etc., can solve the problems of not being able to control solar energy, not being able to control steam from solar boilers, and not meeting the stable and controllable requirements of both large steam turbines and power grids

Inactive Publication Date: 2008-01-31
ZHU YANONG
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  • Abstract
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  • Application Information

AI Technical Summary

Benefits of technology

[0012]A logic boiler for steam-based power plant consists a master controller, a concentrated solar energy boiler and a fossil fuel boiler or thermal storage system. The ...

Problems solved by technology

The solar energy is not controllable.
The uncontrollable solar energy results that steam from the solar boiler is also not controllable, and does not meet the stable and controllable requirements of both large steam turbine and power grid.
The steam turbines, especially large steam turbines require stable and controllable steam input, otherwise, the lifetime ...

Method used

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  • Concentrate solar thermal energy electric power plant logic boiler
  • Concentrate solar thermal energy electric power plant logic boiler
  • Concentrate solar thermal energy electric power plant logic boiler

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Embodiment Construction

[0022]The logic boiler consists of the solar boiler, the fossil fuel boiler and thermal storage as shown in FIG. 1. The high-pressure water from the steam condenser is pumped by 102 P1 and then feed into boilers. The water levels in the boilers are monitored by sensors and controlled by logic boiler controller through 114 V3, 113 V4, and 112 V5.

[0023]The values 114 V3, 113 V4, and 112 V5 are linear valves with redundancy that they can response to the command from the boiler controller to control the water flow rate, resulting control the water levels in the boilers.

[0024]The outputs of the boilers are connected steam mixer through valves 110 V9, and 108 V7. 110 V9, 108 V7, and 107 V8 are on and off valves with redundancy for boilers to be online or offline from the system.

[0025]The values 108 V7 and 115 V2 are thermal charge values with redundancy. They are will be “on” when the thermal storage is on charge mode, and will be “off” when the thermal storage is on discharge mode.

[0026]...

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Abstract

A logic boiler that consists of a concentrated solar energy boiler, a thermal storage system, and a traditional fossil fuel boiler is replacement of the traditional fossil fuel boiler in a power plant for solar thermal electric power generation. The thermal storage system or fossil fuel boiler compensates the output steam of the solar energy boiler to provide on demand, reliable and regulated steam for steam turbine. The controls sequences provide results that maximize the output of the solar boiler while provide the regulated and fast responded steam to the turbine. The control sequences also provide an algorithm to store excessive thermal energy from the solar energy boiler into the thermal storage system. The power plant sees the logic boiler as a conventional boiler without knowing the details of working sequences between the solar boiler and fossil fuel boiler or thermal storage.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a logic boiler constructed from a concentrated solar thermal energy boiler and a fossil fuel boiler or a thermal storage system for generating steam in a solar energy electric power plant.[0003]2. Description of Prior Art[0004]The concentrated solar thermal energy boiler provides clean and fuel burning free steam.[0005]The solar energy is not controllable. It is different from daytime to evening; it is different from summer to winter, and it different from good whether to bad whether. The uncontrollable solar energy results that steam from the solar boiler is also not controllable, and does not meet the stable and controllable requirements of both large steam turbine and power grid.[0006]The steam turbines, especially large steam turbines require stable and controllable steam input, otherwise, the lifetime of the turbine may be reduced or unexpected operating situations may be occurred.[...

Claims

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Application Information

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IPC IPC(8): F01K13/02
CPCF22B35/008F22B33/00
Inventor ZHU, YANONG
Owner ZHU YANONG
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