Numerical optimization and convective thermal loss analysis of improved solar parabolic trough collector receiver system with one sided thermal insulation
TL;DR: In this article, a heat blocking thermal insulation was tailored and fitted in the sun facing receiver annulus which does not receive concentrated radiation of the Sun, and was simulated for the reduction in convective losses and for favorable circumferential temperature distribution (CTD) around the absorber.
About: This article is published in Solar Energy.The article was published on 2017-05-15. It has received 45 citations till now. The article focuses on the topics: Parabolic trough & Convective heat transfer.
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TL;DR: In this article, the theoretical framework of CSP technology with parabolic trough collector (PTC) system is discussed and a detailed derivation process of the maximum theoretical concentration ratio of the PTC was initially given to present the capability of application.
Abstract: Advanced solar energy utilization technology requires high-grade energy to achieve the most efficient application with compact size and least capital investment recovery period Concentrated solar power (CSP) technology has the capability to meet thermal energy and electrical demands Benefits of using CSP technology with parabolic trough collector (PTC) system include promising cost-effective investment, mature technology, and ease of combining with fossil fuels or other renewable energy sources This review first covered the theoretical framework of CSP technology with PTC system Next, the detailed derivation process of the maximum theoretical concentration ratio of the PTC was initially given Multiple types of heat transfer fluids in tube receivers were reviewed to present the capability of application Moreover, recent developments on heat transfer enhancement methods for CSP technology with PTC system were highlighted As the rupture of glass covers was frequently observed during application, methods of thermal deformation restrain for tube receivers were reviewed as well Commercial CSP plants worldwide with PTC system were presented, including those that are in operation, under construction, and announced Finally, possible further developments of CSP plants with PTC system were outlined Besides, suggestions for future research and application guidance were also illustrated
383 citations
TL;DR: In this paper, the authors summarized the existing alternative designs of PTC and suggested the future trends in this area, as well as the use of concentrating thermal photovoltaic collectors.
225 citations
TL;DR: In this paper, a review of current and past studies to assess the optical and thermal performances of parabolic trough solar collectors, modeling approaches and the potential improvements proposed on behalf of the parabolic-trough solar collector design is presented.
206 citations
01 Jan 1990
TL;DR: In response to recent advances in numerical heat transfer research, the K-8 Committee of Theory and Fundamental Research of the ASME Heat Transfer Division has sponsored a symposium on the subject at the 1990 AIAA/ASME Thermophysics and Heat Transfer Conference in Seattle, Washington as mentioned in this paper.
Abstract: In response to recent advances in numerical heat transfer research, the K-8 Committee of Theory and Fundamental Research of the ASME Heat Transfer Division has sponsored a symposium on the subject at the 1990 AIAA/ASME Thermophysics and Heat Transfer Conference in Seattle, Washington. This symposium volume contains the papers presented in three technical sessions. Works dealing with both the methodology and the results of numerical solutions of heat transfer problems are included in this volume. A large number of excellent manuscripts were submitted by researchers from this country and abroad. The papers collected here provide a representative cross section of current contributions to numerical methods in heat transfer.
132 citations
TL;DR: In this article, a comparison among various studies done earlier in the domain to bring forth different models and mediums used to evaluate the effect of nanofluids on thermal parameters for PTC providing an optimum output, resultantly.
88 citations
References
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TL;DR: In this paper, the authors present a review of the applicability and applicability of numerical predictions of turbulent flow, and advocate that computational economy, range of applicability, and physical realism are best served by turbulence models in which the magnitudes of two turbulence quantities, the turbulence kinetic energy k and its dissipation rate ϵ, are calculated from transport equations solved simultaneously with those governing the mean flow behaviour.
11,866 citations
Book•
01 Jan 1971TL;DR: In this paper, a comprehensive discussion of heat transfer by thermal radiation is presented, including the radiative behavior of materials, radiation between surfaces, and gas radiation, and the use of the Monte Carlo technique in solving radiant exchange problems and problems of radiative transfer through absorbing-emitting media.
Abstract: A comprehensive discussion of heat transfer by thermal radiation is presented, including the radiative behavior of materials, radiation between surfaces, and gas radiation. Among the topics considered are property prediction by electromagnetic theory, the observed properties of solid materials, radiation in the presence of other modes of energy transfer, the equations of transfer for an absorbing-emitting gas, and radiative transfer in scattering and absorbing media. Also considered are radiation exchange between black isothermal surfaces, radiation exchange in enclosures composed of diffuse gray surfaces and in enclosures having some specularly reflecting surfaces, and radiation exchange between nondiffuse nongray surfaces. The use of the Monte Carlo technique in solving radiant-exchange problems and problems of radiative transfer through absorbing-emitting media is explained.
5,420 citations
Book•
01 Jan 1949
TL;DR: In this paper, the scientific foundations of the vacuum technique were discussed and the following papers were published: Scientific foundations of vacuum technique, Scientific foundations for vacuum technique and its application in computer vision.
Abstract: Scientific foundations of vacuum technique , Scientific foundations of vacuum technique , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
1,727 citations
Book•
01 Jan 1987
TL;DR: In this paper, the effect of temperature-dependent Fluid properties on convective heat transfer has been investigated in the context of closed-loop convection in Ducts and cross-flow convection over Rod Bundles.
Abstract: Basics of Heat Transfer (S. Kakac & Y. Yener) External Flow Forced Convection (R. Pletcher) Laminar Convective Heat Transfer in Ducts (R. Shah & M. Bhatti) Turbulent and Transition Flow Convective Heat Transfer in Ducts (M. Bhatti & R. Shah) Convective Heat Transfer in Curved Ducts (R. Shah & S. Joshi) Convective Heat Transfer in Cross Flow (A. Zukauskas) Convective Heat Transfer over Rod Bundles (K. Rehme) Convective Heat Transfer in Liquid Metals (C. Reed) Convective Heat Transfer with Electric and Magnetic Fields (F. Kulacki et al.) Convective Heat Transfer in Bends and Fittings (S. Joshi & R. Shah) Transient Forced Convection in Ducts (Y. Yener & S. Kakac) Basics of Natural Convection (Y. Jaluria) Natural Convection in Enclosures (K. Yang) Mixed Convection in External Flow (T. Chen & B. Armaly) Mixed Convection in Internal Flow (W. Aung) Convective Heat Transfer in Porous Media (A. Bejan) Enhancement of Single-phase Heat Transfer (R. Webb) The Effect of Temperature-dependent Fluid Properties on Convective Heat Transfer (S. Kakac) Interaction of Radiation with Convection (M. Ozisik) Non-Newtonian Fluid Flow and Heat Transfer (T. Irvine, Jr & J. Karni) Fouling with Convective Heat Transfer (W. Marner & J. Suitor) Thermophysical Properties (P. Liley) Index.
1,589 citations
01 Jan 2012
TL;DR: In this article, the basics of thermal radiation necessary for the thermal modelling of spacecraft are presented, and the equations necessary to determine the radiation exchange between diffuse, grey surfaces are obtained and written in terms of thermal resistances to apply the electrical analogy.
Abstract: This chapter presents the basics of thermal radiation necessary for the thermal modelling of spacecraft. The nature of thermal radiation is briefly described while the concept of blackbody and the Planck’s distribution, describing the spectral emissive power of a blackbody, are presented. The thermo-optical properties of a surface, emissivity, absorptance, transmittance and reflectance, are defined, and the equations necessary to determine the radiation exchange between diffuse, grey surfaces are obtained and written in terms of thermal resistances to apply the electrical analogy.
816 citations