Characterization of spherical ceramic particles for solar thermal transfer media: A market survey

Hellmann, John R.; McConnell, Vicki S.

doi:10.2172/7197621

Cited by 14 publications

(14 citation statements)

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“…For these reasons, aluminosilicates such as kaolinite and bauxite are popular raw materials for proppant fabrication 5,6 . Previous studies on bauxite‐derived proppants have revealed that their microstructures and phase assemblages are susceptible to change during extended thermal treatment 3 . Similar observations are expected in proppants‐derived from kaolinite.…”

Section: Materials Selection and Experimental Proceduressupporting

confidence: 71%

“…The productivity of the well is increased since lower viscosity fluids are more easily removed from the fracture leaving less trapped frac fluid in the fracture which would inhibit oil and gas flow. Previous studies have shown that physical and mechanical properties such as density, hardness, and strength of proppants are susceptible to change through tailored thermal treatment 2–4 …”

Section: Introductionmentioning

confidence: 99%

“…Previous studies have shown that physical and mechanical properties such as density, hardness, and strength of proppants are susceptible to change through tailored thermal treatment. [2][3][4] The purpose of this study was to determine the role of processing on the structure and subsequent properties of aluminosilicate-derived proppant materials. By establishing the processing-structure-property relationships, the processing parameters required to produce proppants with optimal physical and mechanical properties will be determined.…”

Section: Introductionmentioning

confidence: 99%

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Strength Enhancement of Aluminosilicate Aggregate Through Modified Thermal Treatment

Luscher

Hellmann

Scheetz

et al. 2006

Int J Applied Ceramic Tech

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Commercial aluminosilicate aggregates derived from kaolinite and bauxite were evaluated for various physical and mechanical properties. Suites of thermal treatments based on known phase relationships were performed, resulting in significant modification of microstructural and crystalline phase evolution. These structural changes were evaluated and rationalized via scanning electron microscopy and X‐ray diffraction, respectively. Subsequent measurement of mechanical strengths by diametral compression and density by gas pycnometry indicated increases in overall strengths (up to 24%) at a comparable densities (approximately 2.8 g/cm3) in kaolinite‐derived aggregates. Results of this study are being used to drive processing modifications to achieve higher specific strength in aluminosilicate‐derived aggregates.

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Section: Materials Selection and Experimental Proceduressupporting

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Strength Enhancement of Aluminosilicate Aggregate Through Modified Thermal Treatment

Luscher

Hellmann

Scheetz

et al. 2006

Int J Applied Ceramic Tech

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“…A first attempt to characterize materials for particle receiver applications was conducted by Sandia National Laboratories in the 1980s [9,10] These experiments concentrated mainly on the optical properties of granular materials regarding the solar absorption in a solar direct receiver. Additionally, the sintering resistance as well as the shape and the surface of sintered bauxite and fused zircon grains were characterized.…”

Section: Selection Of Short-listed Materialsmentioning

confidence: 99%

Properties of granular materials as heat transfer and storage medium in CSP application

Baumann

Zunft

2015

Solar Energy Materials and Solar Cells

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a b s t r a c tA selection of granular natural and ceramic materials has been experimentally characterized with regard to their application as heat transfer and storage media in concentrating solar power plants. Thermophysical, thermomechanical, tribological and rheological measurements have been conducted in order to identify the most suitable candidates for this dynamic high temperature operation. Ceramic materials are found to comprise some advantages, but natural products offer a considerably more economic solution. Thermal bulk conductivity is found to be only marginally affected by the solid's thermal conductivity, while specific heat is the same for all solids. Ceramics entirely withstand thermal cycling, while quartzcontaining materials are prone to severe degradation. Most materials are found to attain a saturated state of attrition while being sheared under load, wherein quartz sand offers the lowest mass fraction of debris at saturation level. In the investigated grain size range, all materials show good flowability. The generation of debris requires consideration in the design of the CSP storage components.

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“…Although a number of analytical and laboratory studies have been performed on the falling particle receiver since its inception in the 1980's [2][3][4][5][6][7][8][9][10][11], only one set of on-sun tests of a simple falling particle receiver has been performed [11]. Those tests only achieved 50% thermal efficiency, and the maximum particle temperature increase was only ~250°C.…”

Section: Introductionmentioning

confidence: 99%

System Design of a 1 MW North-facing, Solid Particle Receiver

Christian

2015

Energy Procedia

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Falling solid particle receivers (SPR) utilize small particles as a heat collecting medium within a cavity receiver structure. The components required to operate an SPR include the receiver (to heat the particles), bottom hopper (to catch the falling particles), particle lift elevator (to lift particles back to the top of the receiver), top hopper (to store particles before being dropped through the receiver), and ducting. In addition to the required components, there are additional features needed for an experimental system. These features include: a support structure to house all components, calibration panel to measure incident radiation, cooling loops, and sensors (flux gages, thermocouples, pressure gages). Each of these components had to be designed to withstand temperatures ranging from ambient to 700°C. Thermal stresses from thermal expansion become a key factor in these types of high temperature systems. The SPR will be housing ~3000 kg of solid particles. The final system will be tested at the National Solar Thermal Test Facility in Albuquerque, NM.

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Characterization of spherical ceramic particles for solar thermal transfer media: A market survey

Cited by 14 publications

References 0 publications

Strength Enhancement of Aluminosilicate Aggregate Through Modified Thermal Treatment

Strength Enhancement of Aluminosilicate Aggregate Through Modified Thermal Treatment

Properties of granular materials as heat transfer and storage medium in CSP application

System Design of a 1 MW North-facing, Solid Particle Receiver

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