Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
  • F24S50/00—Arrangements for controlling solar heat collectors
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
  • F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
  • F24S40/50—Preventing overheating or overpressure
  • F24S40/52—Preventing overheating or overpressure by modifying the heat collection, e.g. by defocusing or by changing the position of heat-receiving elements
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E10/00—Energy generation through renewable energy sources
  • Y02E10/40—Solar thermal energy, e.g. solar towers

Definitions

• This invention relates to an adjusting unit of a loop of a solar field, a loop of a solar field with the adjusting element and a solar field with the loop.
• Stable outlet temperatures from a solar field are currently not achieved due to poor performance from the current control structure of the solar field. This has an effect in reducing the overall performance of the solar power plant.
• the current convention for control within the solar field is to adjust by hand mechanical throttle control valves to balance out pressure drops and calculate the HTF (heat transfer fluid) flow required per loop based on the DNI available. Temperature control is achieved by means of a simple step wise defocusing of the solar collector assemblies (SCAs) .
• a further object of the invention is the providing of a use of the solar field.
• the adjusting unit comprises:
• At least one sensor for measuring the loop condition of the loop At least one sensor for measuring the loop condition of the loop
• At least one control valve for adjusting a mass flow of heat transfer fluid through a heat receiver tube of the loop
• At least one defocusing element for defocusing a solar radiation collector assembly of the loop;
• the adjusting unit is adapted such that the adjusting of the mass flow through the heat receiver tube by the control valve and/or the defocusing of the solar radiation assembly is dependent of the working condition of the loop.
• Per loop more than one sensor, more than one control valve and/or more than one defocusing element are possible.
• the sensor, the control valve and the defocusing element are connected to the adjusting unit. Based on information of the sensor the control valve and the defocusing element are controlled .
• the working condition of the loop is a loop temperature.
• the sensor is a temperature sensor.
• the control valve is located such that the mass flow of the heat transfer fluid can be controlled.
• the control valve is located on the inlet or outlet of the heat receiver tube of the loop.
• a loop of a solar field with an adjusting unit is provided as well as a solar field with at least one such loop.
• the solar field is used as a heat source for a solar thermal power plant. By this kind of power plant solar radia- tion is converted into electricity.
• control valve for instance at the inlet or the outlet of each loop, which will adjust the mass flow through the loop with regards to a working condition of the loop (set point, given by DCS, Distributed Control System) , for instance the loop temperature.
• set point given by DCS, Distributed Control System
• This structure will use weighted values from the SCA (solar collector assembly) temperature measurements throughout the loop in order to combat the excessive lag times.
• control valve position feedback is used to modify the delta-P (Differential Pressure) set point for the Pumps in order to increase overall mass flow from through the entire system allowing for the control valves to remain in their optimum control windows.
• the main advantages of the invention are: - Fully automated system and no need to balance the mechanical throttle control valves.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Sustainable Development (AREA)
• Sustainable Energy (AREA)
• Thermal Sciences (AREA)
• Physics & Mathematics (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Flow Control (AREA)
• Photometry And Measurement Of Optical Pulse Characteristics (AREA)
• Engine Equipment That Uses Special Cycles (AREA)

Applications Claiming Priority (2)

Publications (2)

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ID=47296922

Family Applications (1)

Country Status (2)

Cited By (1)

Family Cites Families (7)

• 2012
  • 2012-10-25 CN CN201210412497.9A patent/CN103712353A/zh active Pending
  • 2012-10-25 CN CN201220550393XU patent/CN203203278U/zh not_active Expired - Fee Related
• 2013
  • 2013-10-02 WO PCT/EP2013/070503 patent/WO2014053525A2/en active Application Filing

Non-Patent Citations (1)

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