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Tuesday, August 4, 2020 | History

3 edition of Second-law efficiency of solar-thermal cavity receivers found in the catalog.

Second-law efficiency of solar-thermal cavity receivers

Second-law efficiency of solar-thermal cavity receivers

  • 7 Want to read
  • 27 Currently reading

Published by The Laboratory in Pasadena, Calif .
Written in English

    Subjects:
  • Solar collectors

  • Edition Notes

    StatementP.I. Moynihan ; prepared for U.S. Department of Energy through an agreement with National Aeronautics and Space Administration by Jet Propulsion Laboratory, California Institute of Technology
    SeriesJPL publication -- 83-97, NASA-CR -- 173732, NASA contractor report -- 173732
    ContributionsUnited States. Dept. of Energy, United States. National Aeronautics and Space Administration, Jet Propulsion Laboratory (U.S.)
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL14928753M

    Mounting temperature impedes the conversion efficiency of photovoltaic systems. Studies have shown drastic efficiency escalation of PV modules, if cooled by nanofluids. Ability of nanofluids to supplement the efficiency improvement of PV cells has sought attention of researchers. This chapter presents the magnitude of improved efficiency found by different researchers due to the cooling via Cited by: 2. Jubeh, N.M. Exergy analysis and second law efficiency of a regenerative Brayton cycle with isothermal heat addition. Entropy, 7 (3), p. -

    This would allow component exergy generations terms, and an overall second law efficiency to be outputted, to give a better indication of the availability for HCE performance improvement and to help prioritize design changes to improve trough performance. 43 PAGE 64 3. Bannister, P.//Maximization of Exergy Gain in High Temperature Solar Thermal Receivers by Choice of Pipe Radius./Journal of Heat Transfer {Transactions of the ASME {American Society of Mechanical Engineers}, Series C}, USA. v p, Publ. May //Exergy, Solar recievers, Optimal design/JHTRA/ -

    The School of Engineering is a New York State approved provider of Continuing Education Hours (CEH) for PE license registration. The School of Engineering offers a variety of short courses in a variety of formats (e.g., on-campus, on-site) for Professional Engineers to earn Continuing Education Hours. Laser Heating Applications: Analytical Modeling. B.S. Yilbas ISBN: Elsevier July


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Second-law efficiency of solar-thermal cavity receivers Download PDF EPUB FB2

Second-Law Efficiency of Solar-Thermal Cavity Receivers P.I. Moynihan October 1, PreDared for U.S. Department of Energy Through an Agreement with National Aeronautics and Space Administration by Jet Propulsion Laboratory Californ,a Institute of Tect_nologv Pasadena Cahforn_a JPL.

Get this from a library. Second-law efficiency of solar-thermal cavity receivers. [P I Moynihan; United States.

Department of Energy.; United States. National Aeronautics and Space Administration.; Jet Propulsion Laboratory (U.S.)]. Second-law efficiency of solar-thermal cavity receivers Technical Report Moynihan, P. Properly quantified performance of a solar-thermal cavity receiver must not only account for the energy gains and losses as dictated by the First Law of thermodynamics, but.

The importance of considering the Second-Law is emphasized by a comparison of the First- and Second-Law efficiencies around an example of data collected from two receivers that were designed for different purposes, where the attempt was made to demonstrate that a Second-Law approach to quantifying the performance of a solar-thermal cavity Cited by: 4.

The first law and second law efficiencies are determined for a stainless steel closed-tube open rectangular cavity solar receiver. It is to be used in a small-scale solar thermal Brayton cycle using a micro-turbine with low compressor pressure by: A closed recuperative solar thermal Brayton cycle with helium as working fluid was also studied [10].

The small-scale solar thermal Brayton cycle with recuperator has been thermodynamically optimised in recent work []. Solar cavity receiver Solar receivers can. Request PDF | Published: Jan 1, | First Author: A. Bejan | Abstract:The thermodynamics of solar thermal energy conversion installations is reviewed in the spirit of second law analysis, where Author: Adrian Bejan.

Second-law efficiency of solar-thermal cavity receivers, JPL Publication 83–97, Jet Propulsion Laboratory, Pasadena, California, Oct. Google Scholar Cited by: 2. The maximum departures of the asymptotic second law efficiency are less than 4 percentage points.

Although the NASA receiver configuration is not optimized for cyclic thermodynamic performance, the cycle-integrated first and second law efficiencies compare favorably with steady-state numerical and experimental first and second law by: The efficiency of an open-cavity tubular solar receiver for a small-scale solar thermal Brayton cycle was investigated by Le Roux, Bello-Ochende, and Meyer ().

In their study, they showed that. Stanford Libraries' official online search tool for books, media, journals, databases, government documents and more.

Farahat et al. claimed that according to Najian, Eq. violates the second law of thermodynamics and that the corrected equation according to Torres-Reyes et al.

and Najian, assuming the sun as an infinite thermal source, is Eq., with T ⁎ as the apparent sun temperature and equal to 75% of blackbody temperature of the sun ( K).Also note the inclusion of an optical efficiency, η (16) E Cited by: A comparative study was carried out incorporating a novel approach for thermal performance evaluations of commonly used parabolic trough collectors, namely the Euro, Sky, and Helio troughs.

In the analysis, pressurized water and therminol-VP1 (eutectic mixture of diphenyl oxide (DPO) and biphenyl) fluid were introduced as working fluids, and the governing equation of energy was simulated for Author: Shahzada Zaman Shuja, Bekir Sami Yilbas, Hussain Al-Qahtani.

Full text of "[ Keith Lovegrove, Wes Stein] Concentrating Solar P(Book )" See other formats. This article provides a comprehensive overview of the work to date on the two‑step solar H2O and/or CO2 splitting thermochemical cycles with Zn/ZnO redox reactions to produce H2 and/or CO, i.e., synthesis gas—the precursor to renewable liquid hydrocarbon fuels.

The two-step cycle encompasses: (1) The endothermic dissociation of ZnO to Zn and O2 using concentrated solar energy as the source Cited by: Preface In the beginning of the twenty-first century, our society is faced with an energy challenge: as highly populous, developing countries become more affluent and as the dev.

Downloadable (with restrictions). In this communication, detailed review of the solar thermal power plants based on the available solar concentrator systems like parabolic trough, parabolic dish, central tower, linear Fresnel reflector system are reported.

The aim of the paper is to summarize overall research work being carried out worldwide on the thermodynamic performance evaluation of solar Cited by: Solar thermal collectors and applications Soteris A. Kalogirou* Department of Mechanical Engineering, Higher Technical Institute, P.O.

BoxNicosiaCyprus Received 18 June ; accepted 10 February Abstract In this paper a survey of the various types of solar thermal collectors and applications is presented. Second-law efficiency of solar-thermal cavity receivers. NASA Technical Reports Server (NTRS) Moynihan, P.

Properly quantified performance of a solar-thermal cavity receiver must not only account for the energy gains and losses as dictated by the First Law of thermodynamics, but it must also account for the quality of that energy.

After an introductory chapter, the next three parts of the book focus on key CST plant components, from mirrors and receivers to thermal storage. The final two parts of the book address operation and control and innovative CST system concepts.

Contains authoritative reviews of CST research taking place around the world. The overall efficiency of a solar energy power system is the product of the efficiency of the engine and the efficiency of the solar collector.

Since engine operating temperature approximately equals the receiver temperature, an analysis of the product of Equations () and () will give an optimum operating temperature where receiver."Operating conditions of an open and direct solar thermal Brayton cycle with optimised cavity receiver and recuperator," Energy, Elsevier, vol.

36(10), pages Sarkar, Jahar, " Second law analysis of supercritical CO2 recompression Brayton cycle," Energy, Elsevier, vol. 34(9), pages A closed type of cavity was selected over the open cavity type due to less thermal and optical losses that occur in covered cavity receivers compared to open ones.

42 Figure CAD drawing of receiver cavity coil A CAD drawing of the closed cavity type of receiver developed for this setup is shown in Figure