Bethany Beach, DE, United States
Bethany Beach, DE, United States

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A torque tube (10) of a support structure (1) for supporting at least one reflector (2) for reflecting sunlight (3) is provided. The torque tube (10) comprises following limitations: The torque tube (10) comprises at least one first external torque tube surface (101). The torque tube (10) comprises at least one second external torque tube surface (102). Each of the external torque tube surfaces (101, 102) comprises at least one lug (1011, 1021) for frictional connections of the torque tube (10) with the support structure (1). Each of the lugs (1011, 1021) protrudes the respective external torque tube surface (101, 102). In addition, the lugs (1011, 1021) are connected directly to each other. The lugs (1011, 1021) form a single elongated piece. In addition, a solar collector assembly (2000) with at least one support structure (1) for supporting at least one reflector (2) for reflecting sunlight (3) is provided, wherein the support structure (1) comprises at least one of that torque tube (10). Finally, a use of the solar collector assembly for a solar field of solar thermal power plant for converting solar energy into electrical energy is provided. With the solar field solar radiation is collected by the solar collector assemblies, transferred into thermal energy for generating steam with which a stream turbine is driven for producing electricity.


A support structure (1) for supporting of at least one reflector (2) for reflecting sunlight (3) with following limitations is provided: At least one support base (10), at least two fixed support elements (11) for holding the reflector (2), wherein the fixed support elements (11) are mounted to the support base (10) via a firm connection (110) and at least two flexible support elements (12) for holding the reflector (2), wherein each of the two flexible support elements (2) are mounted to the support base (10) via at least one rotatable joint (120) for a rotatable movement of the flexible support element (12) towards the support base (10). In addition, a solar collector assembly (2000) with at least one such support structure (1) for supporting of at least one reflector (2) for reflecting sunlight (3) is provided. Finally, a use of the solar collector assembly for a solar field of solar thermal power plant for converting solar energy into electrical energy is provided. With the solar field solar radiation is collected by the solar collector assemblies, transferred into thermal energy for generating steam with which a stream turbine is driven for producing electricity.


Grant
Agency: Cordis | Branch: FP7 | Program: CP | Phase: ENERGY.2011.2.5-1 | Award Amount: 4.42M | Year: 2011

The overall objective of the TCSPower project is to realise a new, efficient, reliable and economic thermochemical energy storage (TCS) for concentrated solar power plants which has the capability to contribute significantly to further cost reduction of regenerative electricity production. This will be achieved by applying reversible gas-solid reactions. Dissociation of calcium hydroxide is used for storing thermal energy in a temperature range between 450 and 550C in connection with trough power plants with direct steam generation. For the higher temperatures of central air receiver CSP plants the redox reaction of manganese oxide will be applied. The scientific and technological development in the proposed TCSPower project is focused on three areas: (1) chemical reaction system and storage material issues, (2) design of the TCS reactor taking heat and mass transport aspects in combination with reaction kinetics into account, (3) system integration of the TCS system into the CSP plant. The outcome of the project will include suitable, long-term stable calcium hydroxide and manganese oxide materials with improved functionality in regard to reversible reaction kinetics and heat transfer. A simulation tool for the design of TCS reactors with improved heat and mass transfer characteristics will be applied to identify suitable reactor concepts for the hydroxide and the redox reaction system. Both concepts will be experimentally evaluated in laboratory scale. Additionally, an up-scaling to 10kW will be realized for the more promising reaction system to evaluate the performance of a pilot-scale TCS reactor experimentally. Based on the obtained results, two application-oriented concepts for the integration of the respective TCS systems into CSP plants will be elaborated. Finally, strategies for up-scaling to commercial scale and a techno-economic evaluation of the thermochemical storage systems will be developed.


Patent
Solar Power Limited | Date: 2013-10-30

The invention relates to a tube cleaning system and a tube cleaning process for the use in manufacturing a vacuum air collector tube (1), e.g. a tube used in solar energy technology and especially in solar fields. The system comprises a heating section for burning organics and oils sticking on a surface of the tubes, and an inner and outer tube surface cleaning section (101, 102) for cleaning the inner and/or outer surfaces of the tube (1) by rinsing with a washing fluid (12) under brushing comprising a tube holding means (6, 17), an inner tube cleaning brush (19), and/or a number of outer tube cleaning brushes (11).


Patent
Solar Power Limited | Date: 2013-12-25

A heat receiver tube (1) for absorbing solar energy and for transferring absorbed solar energy to a heat transfer fluid is described. The heat transfer fluid can be located inside a core tube (10) of the heat receiver tube. The core tube (10) of the heat receiver tube comprises a core tube surface (101) to which at least one optical function layer (13,14) is attached. Between the core tube surface (101) and the optical function layer (13,14) a diffusion barrier layer (12) is arranged such that a diffusion of a core tube material of the core tube (10) into the optical function layer (13,14) and/or a diffusion of an optical function layer material of the optical function layer (13,14) into core tube (10) are inhibited. By the diffusion barrier layer (12) a diffusion of a material of the adjacent layers through the diffusion barrier layer (12) is blocked.


Patent
Solar Power Limited | Date: 2013-12-25

The present invention concerns a method of applying a coating (11, 12) to a glass sleeve (3) with an inner surface (5) and an outer surface (7), which glass sleeve (3) is realized as a part of a solar-receiver tube (1). Thereby, the coating (11, 12) is solely applied to one of the said surfaces (5, 7) of the glass sleeve (3). The invention also concerns such glass sleeve (3) a method of fixing such glass sleeve (3) in an interior of a coating tank, such coating tank (35) and a fixing arrangement (28) for fixing such glass sleeve (3) in an interior of a coating tank (35).


Patent
Solar Power Limited | Date: 2013-06-20

Provided is a method for fabricating anti-reflection film with anti-PID effect. The method comprises: vacuuming a furnace tube, holding the temperature in the furnace at 420 C. and the pressure as 80 mTorr for 4 minutes; pretreating silicon wafers at 420 C. with a nitrous oxide flux of 3.8-4.4 slm and pressure of 1700 mTorr for 3 minutes; testing pressure to keep a inner pressure of the furnace tube as a constant value of 50 mTorr for 0.2-0.5 minute; pre-depositing at 420 C., with a ammonia gas flux of 0.1-0.5 slm, a silane flux of 180 sccm-200 sccm, a nitrous oxide flux of 3.5-4.1 slm, pressure of 1000 mTorr and radio frequency power of 4300 w for 0.3-0.5 minute; depositing a film at 450 C., with a ammonia gas flux of 2000-2200 sccm, a silane flux of 7000-7500 sccm, a nitrous oxide flux of 2-2.4 slm, pressure of 1700 mTorr and radio frequency power of 4300 w for 3 minutes; blowing and cooling the film at 420 C. with a nitrogen gas flux of 6-10 slm, pressure of 10000 mTorr for 5-8 minutes. The deposition steps may be more than 2 steps. The obtained anti-reflection film has anti-PID effect, thus can improve the electrical performance of solar cells.


A solar energy absorptive coating for absorbing sunlight energy is provided. The coating includes a multilayer stack including, a first absorbing layer with first absorbing layer material for absorbing an absorption radiation of a certain spectrum of the sunlight, a transmission dielectric layer with a transmission dielectric layer material for a transmission of the absorption radiation, and a second absorbing layer with a second absorbing layer material for absorbing the absorption radiation, wherein at least one of the absorbing layer materials has an absorbing layer material refractive index for the absorption radiation, between 1.5 and 4.0, and an absorbing layer material extinction coefficient for the absorption radiation, between 0.8 and 3.0, and the transmission dielectric layer material has a dielectric layer material refractive index for the absorption radiation, between 1.0 and 3.0, and a dielectric layer material extinction coefficient for the absorption radiation, between 0.0 and 0.2.


Patent
Solar Power Limited | Date: 2013-06-03

A method of applying a coating to a glass sleeve with an inner surface and an outer surface, the glass sleeve configured as a part of a solar-receiver tube, is provided. Thereby, the coating is solely applied to one of the surfaces of the glass sleeve. A method of fixing such glass sleeve in an interior of a coating tank, such coating tank and a fixing arrangement for fixing such glass sleeve in an interior of a coating tank, is also provided.


A heat receiver tube for absorbing solar energy and for transferring absorbed solar energy to a heat transfer fluid which can be located inside at least one core tube of the heat receiver tube is provided. The heat receiver tube comprises following limitations: The core tube comprises a core tube surface with at least one solar energy absorptive coating for absorbing solar radiation of the sunlight. The core tube is enveloped by at least one enveloping tube. The enveloping tube comprises at least one enveloping tube wall which is transparent for the solar radiation. The enveloping tube wall comprises at least one inner enveloping tube surface. The core tube and the enveloping tube are coaxially arranged to each other with an inner heat receiver tube space which is bordered by the core tube surface and the inner enveloping tube surface. At least one internal sunlight reflector unit with at least one internal sunlight reflecting surface for directing sunlight radiation to the core tube surface is arranged in the inner heat receiver tube space. The solar collector comprises a parabolic mirror having a sunlight reflecting mirror surface for directing sunlight to a focal line of the sunlight reflecting mirror surface. The heat receiver tube is arranged in the focal line of the sunlight reflecting mirror surface such that at sunlight which is reflected by the mirror surface strikes the internal reflecting surface.

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