Simulations of heat transfer to solid particles flowing through an array of heated tubes
A novel solar receiver that uses solid particles as a heat transfer fluid is being developed at the National Renewable Energy Laboratory for use in concentrating solar power plants. The prototype considered here is enclosed and contains arrays of hexagonal heat transfer tubes that particles flow bet...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Morris, A.B [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2016 |
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| Rechteinformationen: |
Nutzungsrecht: © Elsevier Ltd |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Solar energy - Kidlington : Elsevier, 1957, 130(2016), Seite 101-115 |
|---|---|
| Übergeordnetes Werk: |
volume:130 ; year:2016 ; pages:101-115 |
| Links: |
|---|
| DOI / URN: |
10.1016/j.solener.2016.01.033 |
|---|
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OLC1977603238 |
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| 520 | |a A novel solar receiver that uses solid particles as a heat transfer fluid is being developed at the National Renewable Energy Laboratory for use in concentrating solar power plants. The prototype considered here is enclosed and contains arrays of hexagonal heat transfer tubes that particles flow between. Discrete element method (DEM) simulations were completed for a laboratory-scale solar receiver for different geometric configurations, hexagon apex angles, particle sizes, and mass flow rates. The heat transfer strongly depends on the particle size, where increased heat transfer is obtained using smaller particles. At higher solids mass flow rates, more particles contact the heat transfer surfaces and the overall heat transfer increases. When a sharper apex angle was used, the particles flow through the receiver at a faster velocity, but the heat transfer decreases because the solids concentration decreases slightly at higher velocities. The DEM simulations show that the heat transfer strongly depends on the solids concentration near the heat transfer surfaces as well as particle size. A new continuum model has recently been developed (Morris et al., 2015) that accounts for both of these effects, and it was previously tested for simple systems. In the current effort, the continuum model was applied to the complex solar receiver and validated via comparison to DEM data. The results indicate that the new continuum model accurately predicts the local heat transfer coefficient and yields an overall heat transfer coefficient with an average error less than 5%. | ||
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10.1016/j.solener.2016.01.033 doi PQ20160719 (DE-627)OLC1977603238 (DE-599)GBVOLC1977603238 (PRQ)c1453-4d6b20420903ad39723e2bf82fa056961c0c13cbeefbde3be0e97a0a0b652ad20 (KEY)0062503520160000130000000101simulationsofheattransfertosolidparticlesflowingth DE-627 ger DE-627 rakwb eng 530 DNB Morris, A.B verfasserin aut Simulations of heat transfer to solid particles flowing through an array of heated tubes 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier A novel solar receiver that uses solid particles as a heat transfer fluid is being developed at the National Renewable Energy Laboratory for use in concentrating solar power plants. The prototype considered here is enclosed and contains arrays of hexagonal heat transfer tubes that particles flow between. Discrete element method (DEM) simulations were completed for a laboratory-scale solar receiver for different geometric configurations, hexagon apex angles, particle sizes, and mass flow rates. The heat transfer strongly depends on the particle size, where increased heat transfer is obtained using smaller particles. At higher solids mass flow rates, more particles contact the heat transfer surfaces and the overall heat transfer increases. When a sharper apex angle was used, the particles flow through the receiver at a faster velocity, but the heat transfer decreases because the solids concentration decreases slightly at higher velocities. The DEM simulations show that the heat transfer strongly depends on the solids concentration near the heat transfer surfaces as well as particle size. A new continuum model has recently been developed (Morris et al., 2015) that accounts for both of these effects, and it was previously tested for simple systems. In the current effort, the continuum model was applied to the complex solar receiver and validated via comparison to DEM data. The results indicate that the new continuum model accurately predicts the local heat transfer coefficient and yields an overall heat transfer coefficient with an average error less than 5%. Nutzungsrecht: © Elsevier Ltd Power plants Simulation Discrete element method Solar energy Photovoltaic cells Heat transfer Ma, Z oth Pannala, S oth Hrenya, C.M oth Enthalten in Solar energy Kidlington : Elsevier, 1957 130(2016), Seite 101-115 (DE-627)129596795 (DE-600)240833-8 (DE-576)015089959 0038-092X nnns volume:130 year:2016 pages:101-115 http://dx.doi.org/10.1016/j.solener.2016.01.033 Volltext http://www.sciencedirect.com/science/article/pii/S0038092X16000578 http://search.proquest.com/docview/1781548711 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_70 GBV_ILN_2016 AR 130 2016 101-115 |
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A new continuum model has recently been developed (Morris et al., 2015) that accounts for both of these effects, and it was previously tested for simple systems. In the current effort, the continuum model was applied to the complex solar receiver and validated via comparison to DEM data. 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Simulations of heat transfer to solid particles flowing through an array of heated tubes |
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Simulations of heat transfer to solid particles flowing through an array of heated tubes |
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10.1016/j.solener.2016.01.033 |
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simulations of heat transfer to solid particles flowing through an array of heated tubes |
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Simulations of heat transfer to solid particles flowing through an array of heated tubes |
| abstract |
A novel solar receiver that uses solid particles as a heat transfer fluid is being developed at the National Renewable Energy Laboratory for use in concentrating solar power plants. The prototype considered here is enclosed and contains arrays of hexagonal heat transfer tubes that particles flow between. Discrete element method (DEM) simulations were completed for a laboratory-scale solar receiver for different geometric configurations, hexagon apex angles, particle sizes, and mass flow rates. The heat transfer strongly depends on the particle size, where increased heat transfer is obtained using smaller particles. At higher solids mass flow rates, more particles contact the heat transfer surfaces and the overall heat transfer increases. When a sharper apex angle was used, the particles flow through the receiver at a faster velocity, but the heat transfer decreases because the solids concentration decreases slightly at higher velocities. The DEM simulations show that the heat transfer strongly depends on the solids concentration near the heat transfer surfaces as well as particle size. A new continuum model has recently been developed (Morris et al., 2015) that accounts for both of these effects, and it was previously tested for simple systems. In the current effort, the continuum model was applied to the complex solar receiver and validated via comparison to DEM data. The results indicate that the new continuum model accurately predicts the local heat transfer coefficient and yields an overall heat transfer coefficient with an average error less than 5%. |
| abstractGer |
A novel solar receiver that uses solid particles as a heat transfer fluid is being developed at the National Renewable Energy Laboratory for use in concentrating solar power plants. The prototype considered here is enclosed and contains arrays of hexagonal heat transfer tubes that particles flow between. Discrete element method (DEM) simulations were completed for a laboratory-scale solar receiver for different geometric configurations, hexagon apex angles, particle sizes, and mass flow rates. The heat transfer strongly depends on the particle size, where increased heat transfer is obtained using smaller particles. At higher solids mass flow rates, more particles contact the heat transfer surfaces and the overall heat transfer increases. When a sharper apex angle was used, the particles flow through the receiver at a faster velocity, but the heat transfer decreases because the solids concentration decreases slightly at higher velocities. The DEM simulations show that the heat transfer strongly depends on the solids concentration near the heat transfer surfaces as well as particle size. A new continuum model has recently been developed (Morris et al., 2015) that accounts for both of these effects, and it was previously tested for simple systems. In the current effort, the continuum model was applied to the complex solar receiver and validated via comparison to DEM data. The results indicate that the new continuum model accurately predicts the local heat transfer coefficient and yields an overall heat transfer coefficient with an average error less than 5%. |
| abstract_unstemmed |
A novel solar receiver that uses solid particles as a heat transfer fluid is being developed at the National Renewable Energy Laboratory for use in concentrating solar power plants. The prototype considered here is enclosed and contains arrays of hexagonal heat transfer tubes that particles flow between. Discrete element method (DEM) simulations were completed for a laboratory-scale solar receiver for different geometric configurations, hexagon apex angles, particle sizes, and mass flow rates. The heat transfer strongly depends on the particle size, where increased heat transfer is obtained using smaller particles. At higher solids mass flow rates, more particles contact the heat transfer surfaces and the overall heat transfer increases. When a sharper apex angle was used, the particles flow through the receiver at a faster velocity, but the heat transfer decreases because the solids concentration decreases slightly at higher velocities. The DEM simulations show that the heat transfer strongly depends on the solids concentration near the heat transfer surfaces as well as particle size. A new continuum model has recently been developed (Morris et al., 2015) that accounts for both of these effects, and it was previously tested for simple systems. In the current effort, the continuum model was applied to the complex solar receiver and validated via comparison to DEM data. The results indicate that the new continuum model accurately predicts the local heat transfer coefficient and yields an overall heat transfer coefficient with an average error less than 5%. |
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| title_short |
Simulations of heat transfer to solid particles flowing through an array of heated tubes |
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http://dx.doi.org/10.1016/j.solener.2016.01.033 http://www.sciencedirect.com/science/article/pii/S0038092X16000578 http://search.proquest.com/docview/1781548711 |
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