Steam generation in line-focus solar collectors: a comparative assessment of thermal performance, operating stability, and cost issues

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The engineering and system benefits of using direct steam (in situ) generation in line-focus collectors are assessed. The major emphasis of the analysis is a detailed thermal performance comparison of in situ systems (which utilize unfired boilers). The analysis model developed for this study is discussed in detail. An analysis of potential flow stability problems is also provided along with a cursory cost analysis and an assessment of freeze protection, safety, and control issues. Results indicated a significant thermal performance advantage over the more conventional oil and flash systems and the flow stability does not appear to be a significant ... continued below

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Pages: 166

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Murphy, L.M. & May, E.K. April 1, 1982.

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Description

The engineering and system benefits of using direct steam (in situ) generation in line-focus collectors are assessed. The major emphasis of the analysis is a detailed thermal performance comparison of in situ systems (which utilize unfired boilers). The analysis model developed for this study is discussed in detail. An analysis of potential flow stability problems is also provided along with a cursory cost analysis and an assessment of freeze protection, safety, and control issues. Results indicated a significant thermal performance advantage over the more conventional oil and flash systems and the flow stability does not appear to be a significant problem. In particular, at steam temperatures of 220/sup 0/C (430/sup 0/F) under the chosen set of assumptions, annual delivered energy predictions indicate that the in situ system can deliver 15% more energy than an oil system and 12% more energy than a flash system, with all of the systems using the same collector field. Further, the in situ system may result in a 10% capital cost reduction. Other advantages include improvement in simpler control when compared with flash systems, and fluid handling and safety enhancement when compared with oil systems.

Physical Description

Pages: 166

Notes

NTIS, PC A08/MF A01.

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  • Other Information: Portions of document are illegible

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  • Other: DE82014531
  • Report No.: SERI/TR-632-1311
  • Grant Number: AC02-77CH00178
  • DOI: 10.2172/5247106 | External Link
  • Office of Scientific & Technical Information Report Number: 5247106
  • Archival Resource Key: ark:/67531/metadc1074548

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • April 1, 1982

Added to The UNT Digital Library

  • Feb. 4, 2018, 10:51 a.m.

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  • March 23, 2018, 6:14 p.m.

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Murphy, L.M. & May, E.K. Steam generation in line-focus solar collectors: a comparative assessment of thermal performance, operating stability, and cost issues, report, April 1, 1982; United States. (digital.library.unt.edu/ark:/67531/metadc1074548/: accessed May 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.