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In this work, the flexible operation of an Integrated Solar Combined Cycle (ISCC) power plant has been optimized considering two different energy storage approaches. The objective of this proposal is to meet variable users’ grid demand for an extended period at the lowest cost of electricity. Medium temperature thermal energy storage (TES) and hydrogen generation configurations have been analyzed from a techno-economic point of view. Results found from annual solar plant performance indicate that molten salts storage solution is preferable based on the lower levelized cost of electricity (0.122 USD/kWh compared to 0.158 USD/kWh from the hydrogen generation case) due to the lower conversion efficiencies of hydrogen plant components. However, the hydrogen plant configuration exceeded, in terms of plant availability and grid demand coverage, as fewer design constraints resulted in a total demand coverage of 2155 h per year. It was also found that grid demand curves from industrial countries limit the deployment of medium-temperature TES systems coupled to ISCC power plants, since their typical demand curves are characterized by lower power demand around solar noon when solar radiation is higher. In such scenarios, the Brayton turbine design is constrained by noon grid demand, which limits the solar field and receiver thermal power design.
Miguel Reyes-Belmonte; Alejandra Ambrona-Bermúdez; Daniel Calvo-Blázquez. Flexible Electricity Dispatch of an Integrated Solar Combined Cycle through Thermal Energy Storage and Hydrogen Production. Thermo 2021, 1, 106 -121.
AMA StyleMiguel Reyes-Belmonte, Alejandra Ambrona-Bermúdez, Daniel Calvo-Blázquez. Flexible Electricity Dispatch of an Integrated Solar Combined Cycle through Thermal Energy Storage and Hydrogen Production. Thermo. 2021; 1 (1):106-121.
Chicago/Turabian StyleMiguel Reyes-Belmonte; Alejandra Ambrona-Bermúdez; Daniel Calvo-Blázquez. 2021. "Flexible Electricity Dispatch of an Integrated Solar Combined Cycle through Thermal Energy Storage and Hydrogen Production." Thermo 1, no. 1: 106-121.
In this paper, solar energy research trends and their publishing evolution are presented in terms of bibliometric analysis tools applied to the existing publications within the Web of Science Core Collection. Publishing evolution shows a clear interest in solar energy topics, as 50% of the total number of publications have been published within the time period between 2015 and 2020; most of them at journals and conference proceedings. A results analysis shows that China, the United States and India were the most productive countries in terms of solar energy research publications, and the list of the 10 most productive countries accounted for 83% of total publications within 2019 and 2020. The study pointed out as well that the main thematic areas in solar energy research in 2019–2020 were related to particular topics such as solar cells and optical properties, nanoparticles and composites, TiO2 and photocatalysis, and more general topics such as performance, simulations optimization and renewable energy. Based on paper findings, the research future of solar energy is bright, with continued growth in the publications record and a wide variety of research topics.
Miguel Reyes-Belmonte. Quo Vadis Solar Energy Research? Applied Sciences 2021, 11, 3015 .
AMA StyleMiguel Reyes-Belmonte. Quo Vadis Solar Energy Research? Applied Sciences. 2021; 11 (7):3015.
Chicago/Turabian StyleMiguel Reyes-Belmonte. 2021. "Quo Vadis Solar Energy Research?" Applied Sciences 11, no. 7: 3015.
In this paper, a bibliometric analysis was performed in order to analyze the state of the art and publication trends on the topic of ISCC (Integrated Solar Combined Cycles) for the period covering 1990 to July 2020. The Web of Science (WOS) database was consulted, and 1277 publications from 3157 different authors and 1102 different institutions, distributed among 78 countries, were retrieved as the corpus of the study. The VOSViewer software tool was used for the post-processing of the WOS corpus, and for the network data mapping. Multiple bibliometric indicators, such as the number of citations, keyword occurrences, the authors’ affiliations, and the authors, among others, were analysed in this paper in order to find the main research trends on the ISCC topic. The analysis performed in this paper concluded that the main publication source for ISCC research was Energy Conversion and Management, in terms of the total number of publications (158), but Solar Energy had the highest number of citations on the ISCC topic (4438). It was also found that China was the most productive country in terms of ISCC publications (241), and the Chinese Academy of Sciences was the most productive institution (52). Nevertheless, the author with the most publications on ISCC was I. Dincer, from Ontario Tech University (24). Based on publication keywords, a series of recommendations for future developments in the ISCC topic were derived, as well as the ways in which those ideas are connected to the global state of solar energy research.
Miguel Reyes-Belmonte. A Bibliometric Study on Integrated Solar Combined Cycles (ISCC), Trends and Future Based on Data Analytics Tools. Sustainability 2020, 12, 8217 .
AMA StyleMiguel Reyes-Belmonte. A Bibliometric Study on Integrated Solar Combined Cycles (ISCC), Trends and Future Based on Data Analytics Tools. Sustainability. 2020; 12 (19):8217.
Chicago/Turabian StyleMiguel Reyes-Belmonte. 2020. "A Bibliometric Study on Integrated Solar Combined Cycles (ISCC), Trends and Future Based on Data Analytics Tools." Sustainability 12, no. 19: 8217.
Most turbocharger gas stands are designed to map performance under steady flow conditions. However, when connected to an internal combustion engine (ICE), the turbine is exposed to pulsatile flow. In order to enable a full analysis of the unsteady flow and turbocharger performance, it is crucial to quantify unsteady flow effects in the gas stand tests. This paper presents the development and use of bespoke experimental hardware that aims to generate flows in a gas-stand with characteristics similar to that produced by an ICE. This is achieved using a specially modified cylinder head placed between the hot supply and the turbocharger. The device has been designed, manufactured and tested on the gas stand showing its usefulness to study the energy exchange between the engine and the turbine. Testing a turbocharger where a cylinder is deactivated showed large changes in the instantaneous turbocharger speed, pressure and temperature profiles. These unsteady characteristics resulted in a change in the turbocharger behaviour. The insights into unsteady characteristics is expected to contribute to both engine calibration and turbocharger design. It also demonstrates the novelty of the approach in delivering a means to replicate hot, engine-like flow unsteadiness and thereby a wider, more representative data set.
R. Vijayakumar; S. Akehurst; Z. Liu; M.A. Reyes-Belmonte; Chris Brace; D. Liu; C. Copeland. Design and testing a bespoke cylinder head pulsating flow generator for a turbocharger gas stand. Energy 2019, 189, 116291 .
AMA StyleR. Vijayakumar, S. Akehurst, Z. Liu, M.A. Reyes-Belmonte, Chris Brace, D. Liu, C. Copeland. Design and testing a bespoke cylinder head pulsating flow generator for a turbocharger gas stand. Energy. 2019; 189 ():116291.
Chicago/Turabian StyleR. Vijayakumar; S. Akehurst; Z. Liu; M.A. Reyes-Belmonte; Chris Brace; D. Liu; C. Copeland. 2019. "Design and testing a bespoke cylinder head pulsating flow generator for a turbocharger gas stand." Energy 189, no. : 116291.
This paper presents a novel power block concept for flexible electricity dispatch in a Concentrating Solar Power (CSP) plant. The power block is based on intercooled – unfired regenerative closed air Brayton cycle that is connected to a pressurized solar air receiver. The Closed Brayton cycle uses a mass flow regulation system centered on the pressure regulation (auxiliary compressor and bleed valve) in order to control the Turbine Inlet Temperature (TIT). Doing so, the system is able to modulate turbine electricity production according to variations in the solar resource and changes in power electric demand. It has been found that the proposed power block is able to fully cover the electricity demand curve for those days with high solar resource. In case of integrating particles-based high temperature Thermal Energy Storage (TES) system, the power block can extend its production till the next day following the electricity curve demand during summer period. During winter period, the power plant can extend its production for a few hours due to the lower solar resource and the higher electric curve demand load.
F. Rovense; M.A. Reyes-Belmonte; J. González-Aguilar; M. Amelio; S. Bova; M. Romero. Flexible electricity dispatch for CSP plant using un-fired closed air Brayton cycle with particles based thermal energy storage system. Energy 2019, 173, 971 -984.
AMA StyleF. Rovense, M.A. Reyes-Belmonte, J. González-Aguilar, M. Amelio, S. Bova, M. Romero. Flexible electricity dispatch for CSP plant using un-fired closed air Brayton cycle with particles based thermal energy storage system. Energy. 2019; 173 ():971-984.
Chicago/Turabian StyleF. Rovense; M.A. Reyes-Belmonte; J. González-Aguilar; M. Amelio; S. Bova; M. Romero. 2019. "Flexible electricity dispatch for CSP plant using un-fired closed air Brayton cycle with particles based thermal energy storage system." Energy 173, no. : 971-984.
Concentrated solar power plants using molten salts as heat transfer and storage fluid have emerged as the preferred commercial solution for solar thermal electricity in central receiver technology. Despite their ability to store large amounts of thermal energy and efficient receiver designs, further efficiency improvements are constrained by tight temperature restrictions when using molten salts (290 °C to 565 °C). In this work, a novel heat transfer fluid based on a dense particle suspension (DPS) is used due to its excellent thermophysical properties that extend the operating temperature of solar receiver and allow its coupling with higher-efficiency power cycles. In this paper, the design of a DPS solar receiver working at 650 °C has been optimized for two commercial sizes (50 MWth and 290 MWth) coupled to an optimized subcritical Rankine cycle. The results showed that a five-extraction reheated Rankine cycle operating at 610 °C and 180 bar maximizes power plant efficiency when coupled with a DPS central receiver, giving 41% power block efficiency and 23% sun-to-electricity efficiency. For optimization purposes at design point conditions, in-house code programmed into MATLAB platform was used while TRNSYS software was employed for annual plant performance analysis.
M.A. Reyes-Belmonte; A. Sebastián; J. Spelling; M. Romero; J. González-Aguilar. Annual performance of subcritical Rankine cycle coupled to an innovative particle receiver solar power plant. Renewable Energy 2019, 130, 786 -795.
AMA StyleM.A. Reyes-Belmonte, A. Sebastián, J. Spelling, M. Romero, J. González-Aguilar. Annual performance of subcritical Rankine cycle coupled to an innovative particle receiver solar power plant. Renewable Energy. 2019; 130 ():786-795.
Chicago/Turabian StyleM.A. Reyes-Belmonte; A. Sebastián; J. Spelling; M. Romero; J. González-Aguilar. 2019. "Annual performance of subcritical Rankine cycle coupled to an innovative particle receiver solar power plant." Renewable Energy 130, no. : 786-795.
This paper presents an integration methodology for medium and high temperature solar aided coal-fired power generation systems. A set of preferred integration methods is proposed using analysis of pinch point, exergy and solar share and the application of system simulation methods. These methods can be used for hybrid (solar/fossil) systems screening, pre-assessment and decision-making. Power plant annual performance is analyzed to confirm the validity of the abovementioned methods. The presented methodology has been applied into a 100 + 1000 MWe grade solar tower aided coal-fired power generation plant (STAPG). According to the proposed methodology, the best integration scheme is found for a scenario where high-temperature solar thermal energy is used for steam reheating, while the remaining solar thermal energy is used for feedwater heating providing the maximum utilization of solar energy. The analysis reveals that as much as 214.7 MWe could be generated using solar thermal energy under the best integration scheme. This accounts for 21.3% of total electricity produced, while representing more than twice as much the power produced by an equivalent stand-alone solar tower power plant of the same solar field size. Furthermore, solar-to-electricity efficiency of the hybrid system may reach 36.8%, with power block efficiency of 43.3%, and the coal consumption rate is 203.5 g/kW h. All these parameters are representative of the best scenario amongst the seven integration schemes studied in this paper.
Yong Zhu; Jie Pei; Chuanzhao Cao; Rongrong Zhai; Yongping Yang; Miguel Angel Reyes Belmonte; José Gonzalez-Aguilar; Manuel Romero. Optimization of solar aided coal-fired power plant layouts using multi-criteria assessment. Applied Thermal Engineering 2018, 137, 406 -418.
AMA StyleYong Zhu, Jie Pei, Chuanzhao Cao, Rongrong Zhai, Yongping Yang, Miguel Angel Reyes Belmonte, José Gonzalez-Aguilar, Manuel Romero. Optimization of solar aided coal-fired power plant layouts using multi-criteria assessment. Applied Thermal Engineering. 2018; 137 ():406-418.
Chicago/Turabian StyleYong Zhu; Jie Pei; Chuanzhao Cao; Rongrong Zhai; Yongping Yang; Miguel Angel Reyes Belmonte; José Gonzalez-Aguilar; Manuel Romero. 2018. "Optimization of solar aided coal-fired power plant layouts using multi-criteria assessment." Applied Thermal Engineering 137, no. : 406-418.
In this paper, we conduct a techno-economic analysis of a 1000 MWe solar tower aided coal-fired power generation system for the whole life cycle. Firstly, the power output (from coal and solar thermal energy) under variable direct normal irradiance and grid demand are studied. Secondly, a financial assessment is performed, including profits and losses of the plant project. Thirdly, sensitivity analysis is taken on some external factors that can affect the cost or profits and losses of the plant project. The results indicate that the project has high profits with an internal rate of return (IRR) of 8.7%. In addition, the effects of solar tower field cost, power purchase agreement (PPA) price of solar thermal electricity, coal price, and the interest rate of debt on the main criteria decrease gradually. Therefore, it is better to improve solar tower technology first, and then look for low-interest debts from banks to cope with the reduction of PPA price of solar thermal electricity and the increase of coal price. Despite the introduction of solar tower field increasing levelized cost of electricity (LCOE), it contributes to the reduction of CO2 capture cost compared to the case of standard coal-fired power plants.
Yong Zhu; Rongrong Zhai; Yongping Yang; Miguel Angel Reyes-Belmonte. Techno-Economic Analysis of Solar Tower Aided Coal-Fired Power Generation System. Energies 2017, 10, 1392 .
AMA StyleYong Zhu, Rongrong Zhai, Yongping Yang, Miguel Angel Reyes-Belmonte. Techno-Economic Analysis of Solar Tower Aided Coal-Fired Power Generation System. Energies. 2017; 10 (9):1392.
Chicago/Turabian StyleYong Zhu; Rongrong Zhai; Yongping Yang; Miguel Angel Reyes-Belmonte. 2017. "Techno-Economic Analysis of Solar Tower Aided Coal-Fired Power Generation System." Energies 10, no. 9: 1392.
Yong Zhu; Rongrong Zhai; Jiawei Qi; Yongping Yang; Miguel Angel Reyes Belmonte; Manuel Romero; Qin Yan. Annual performance of solar tower aided coal-fired power generation system. Energy 2017, 119, 662 -674.
AMA StyleYong Zhu, Rongrong Zhai, Jiawei Qi, Yongping Yang, Miguel Angel Reyes Belmonte, Manuel Romero, Qin Yan. Annual performance of solar tower aided coal-fired power generation system. Energy. 2017; 119 ():662-674.
Chicago/Turabian StyleYong Zhu; Rongrong Zhai; Jiawei Qi; Yongping Yang; Miguel Angel Reyes Belmonte; Manuel Romero; Qin Yan. 2017. "Annual performance of solar tower aided coal-fired power generation system." Energy 119, no. : 662-674.
Miguel A. Reyes-Belmonte; Manuel Romero; Hadrien Benoit; Gilles Flamant; Fabrisio Gómez-García; José González-Aguilar. Heat exchanger modelling in central receiver solar power plant using dense particle suspension. SOLARPACES 2016: International Conference on Concentrating Solar Power and Chemical Energy Systems 2017, 1850, 30042 .
AMA StyleMiguel A. Reyes-Belmonte, Manuel Romero, Hadrien Benoit, Gilles Flamant, Fabrisio Gómez-García, José González-Aguilar. Heat exchanger modelling in central receiver solar power plant using dense particle suspension. SOLARPACES 2016: International Conference on Concentrating Solar Power and Chemical Energy Systems. 2017; 1850 ():30042.
Chicago/Turabian StyleMiguel A. Reyes-Belmonte; Manuel Romero; Hadrien Benoit; Gilles Flamant; Fabrisio Gómez-García; José González-Aguilar. 2017. "Heat exchanger modelling in central receiver solar power plant using dense particle suspension." SOLARPACES 2016: International Conference on Concentrating Solar Power and Chemical Energy Systems 1850, no. : 30042.
The potential of using different thermodynamic cycles coupled to a solar tower central receiver that uses a novel heat transfer fluid is analyzed. The new fluid, named as DPS, is a dense suspension of solid particles aerated through a tubular receiver used to convert concentrated solar energy into thermal power. This novel fluid allows reaching high temperatures at the solar receiver what opens a wide range of possibilities for power cycle selection. This work has been focused into the assessment of power plant performance using conventional, but optimized cycles but also novel thermodynamic concepts. Cases studied are ranging from subcritical steam Rankine cycle; open regenerative Brayton air configurations at medium and high temperature; combined cycle; closed regenerative Brayton helium scheme and closed recompression supercritical carbon dioxide Brayton cycle. Power cycle diagrams and working conditions for design point are compared amongst the studied cases for a common reference thermal power of 57 MWth reaching the central cavity receiver. It has been found that Brayton air cycle working at high temperature or using supercritical carbon dioxide are the most promising solutions in terms of efficiency conversion for the power block of future generation by means of concentrated solar power plants.
Miguel A. Reyes-Belmonte; Andrés Sebastián; José González-Aguilar; Manuel Romero. Performance comparison of different thermodynamic cycles for an innovative central receiver solar power plant. AIP Conference Proceedings 2017, 1 .
AMA StyleMiguel A. Reyes-Belmonte, Andrés Sebastián, José González-Aguilar, Manuel Romero. Performance comparison of different thermodynamic cycles for an innovative central receiver solar power plant. AIP Conference Proceedings. 2017; ():1.
Chicago/Turabian StyleMiguel A. Reyes-Belmonte; Andrés Sebastián; José González-Aguilar; Manuel Romero. 2017. "Performance comparison of different thermodynamic cycles for an innovative central receiver solar power plant." AIP Conference Proceedings , no. : 1.
Polymethylmethacrylate (PMMA) plastic fiber has been used in daylighting system for a long time, however, the quantitative study of its optical properties is still limited. It has been verified in this paper that shortpass dichroic mirror (SDM) can effectively filter out up to 64% of infrared ray from high flux, resulting in small losses of visible spectrum of natural light. Experiments confirmed as well that SDM can significantly reduce infrared thermal effects effectively protecting PMMA plastic fiber. In addition, the effect of incidence angle on the attenuation of fiber is also measured. It has been proven that attenuation rate increases with the incident angle. Experimental data presented here can be used for daylighting system optimization using PMMA fibers.
Jifeng Song; Yong Zhu; Kai Tong; Yongping Yang; Miguel Angel Reyes Belmonte. A note on the optic characteristics of daylighting system via PMMA fibers. Solar Energy 2016, 136, 32 -34.
AMA StyleJifeng Song, Yong Zhu, Kai Tong, Yongping Yang, Miguel Angel Reyes Belmonte. A note on the optic characteristics of daylighting system via PMMA fibers. Solar Energy. 2016; 136 ():32-34.
Chicago/Turabian StyleJifeng Song; Yong Zhu; Kai Tong; Yongping Yang; Miguel Angel Reyes Belmonte. 2016. "A note on the optic characteristics of daylighting system via PMMA fibers." Solar Energy 136, no. : 32-34.
M.A. Reyes-Belmonte; A. Sebastián; M. Romero; José Gonzalez-Aguilar. Optimization of a recompression supercritical carbon dioxide cycle for an innovative central receiver solar power plant. Energy 2016, 112, 17 -27.
AMA StyleM.A. Reyes-Belmonte, A. Sebastián, M. Romero, José Gonzalez-Aguilar. Optimization of a recompression supercritical carbon dioxide cycle for an innovative central receiver solar power plant. Energy. 2016; 112 ():17-27.
Chicago/Turabian StyleM.A. Reyes-Belmonte; A. Sebastián; M. Romero; José Gonzalez-Aguilar. 2016. "Optimization of a recompression supercritical carbon dioxide cycle for an innovative central receiver solar power plant." Energy 112, no. : 17-27.
Yong Zhu; Rongrong Zhai; Hao Peng; Yongping Yang. Exergy destruction analysis of solar tower aided coal-fired power generation system using exergy and advanced exergetic methods. Applied Thermal Engineering 2016, 108, 339 -346.
AMA StyleYong Zhu, Rongrong Zhai, Hao Peng, Yongping Yang. Exergy destruction analysis of solar tower aided coal-fired power generation system using exergy and advanced exergetic methods. Applied Thermal Engineering. 2016; 108 ():339-346.
Chicago/Turabian StyleYong Zhu; Rongrong Zhai; Hao Peng; Yongping Yang. 2016. "Exergy destruction analysis of solar tower aided coal-fired power generation system using exergy and advanced exergetic methods." Applied Thermal Engineering 108, no. : 339-346.
Jose Ramon Serrano; Pablo Olmeda; Francisco J. Arnau; Miguel A. Reyes-Belmonte; Hadi Tartoussi. A study on the internal convection in small turbochargers. Proposal of heat transfer convective coefficients. Applied Thermal Engineering 2015, 89, 587 -599.
AMA StyleJose Ramon Serrano, Pablo Olmeda, Francisco J. Arnau, Miguel A. Reyes-Belmonte, Hadi Tartoussi. A study on the internal convection in small turbochargers. Proposal of heat transfer convective coefficients. Applied Thermal Engineering. 2015; 89 ():587-599.
Chicago/Turabian StyleJose Ramon Serrano; Pablo Olmeda; Francisco J. Arnau; Miguel A. Reyes-Belmonte; Hadi Tartoussi. 2015. "A study on the internal convection in small turbochargers. Proposal of heat transfer convective coefficients." Applied Thermal Engineering 89, no. : 587-599.
Miguel Angel Reyes Belmonte. Contribution to the Experimental Characterization and 1-D Modelling of Turbochargers for IC Engines. Contribution to the Experimental Characterization and 1-D Modelling of Turbochargers for IC Engines 2015, 1 .
AMA StyleMiguel Angel Reyes Belmonte. Contribution to the Experimental Characterization and 1-D Modelling of Turbochargers for IC Engines. Contribution to the Experimental Characterization and 1-D Modelling of Turbochargers for IC Engines. 2015; ():1.
Chicago/Turabian StyleMiguel Angel Reyes Belmonte. 2015. "Contribution to the Experimental Characterization and 1-D Modelling of Turbochargers for IC Engines." Contribution to the Experimental Characterization and 1-D Modelling of Turbochargers for IC Engines , no. : 1.
Yong Zhu; Rongrong Zhai; Miaomiao Zhao; Yongping Yang; Qin Yan. Evaluation methods of solar contribution in solar aided coal-fired power generation system. Energy Conversion and Management 2015, 102, 209 -216.
AMA StyleYong Zhu, Rongrong Zhai, Miaomiao Zhao, Yongping Yang, Qin Yan. Evaluation methods of solar contribution in solar aided coal-fired power generation system. Energy Conversion and Management. 2015; 102 ():209-216.
Chicago/Turabian StyleYong Zhu; Rongrong Zhai; Miaomiao Zhao; Yongping Yang; Qin Yan. 2015. "Evaluation methods of solar contribution in solar aided coal-fired power generation system." Energy Conversion and Management 102, no. : 209-216.
One dimensional wave-action engine models have become an essential tool within engine development including stages of component selection, understanding system interactions and control strategy development. Simple turbocharger models are seen as a weak link in the accuracy of these simulation tools and advanced models have been proposed to account for phenomena including heat transfer. In order to run within a full engine code, these models are necessarily simple in structure yet are required to describe a highly complex 3D problem. This paper aims to assess the validity of one of the key assumptions in simple heat transfer models, namely, that the heat transfer between the compressor casing and intake air occurs only after the compression process. Initially a sensitivity study was conducted on a simple lumped capacity thermal model of a turbocharger. A new partition parameter was introduced αA, which divides the internal wetted area of the compressor housing into pre and post compression. The sensitivity of heat fluxes to αA was quantified with respect to the sensitivity to turbine inlet temperature (TIT). At low speeds, the TIT was the dominant effect on compressor efficiency whereas at high speed αA had a similar influence to TIT. However, modelling of the conduction within the compressor housing using an additional thermal resistance caused changes in heat flows of less than 10%. Three dimensional CFD analysis was undertaken using a number of cases approximating different values of αA. It was seen that when considering a case similar to αA=0, meaning that heat transfer on the compressor side is considered to occur only after the compression process, significant temperature could build up in the impeller area of the compressor housing, indicating the importance of the pre-compression heat path. The 3D simulation was used to estimate a realistic value for αA which was suggested to be between 0.15 and 0.3. Using a value of this magnitude in the lumped capacitance model showed that at low speed there would be less than 1% point effect on apparent efficiency which would be negligible compared to the 8% point seen as a result of TIT. In contrast, at high speeds, the impact of αA was similar to that of TIT, both leading to approximately 1% point apparent efficiency error.
Richard Burke; Colin Copeland; T. Duda; M. A. Reyes-Belmonte. Lumped Capacitance and 3D CFD Conjugate Heat Transfer Modelling of an Automotive Turbocharger. Volume 7B: Structures and Dynamics 2015, 1 .
AMA StyleRichard Burke, Colin Copeland, T. Duda, M. A. Reyes-Belmonte. Lumped Capacitance and 3D CFD Conjugate Heat Transfer Modelling of an Automotive Turbocharger. Volume 7B: Structures and Dynamics. 2015; ():1.
Chicago/Turabian StyleRichard Burke; Colin Copeland; T. Duda; M. A. Reyes-Belmonte. 2015. "Lumped Capacitance and 3D CFD Conjugate Heat Transfer Modelling of an Automotive Turbocharger." Volume 7B: Structures and Dynamics , no. : 1.
In this paper, a fiber optic daylighting system based on the parallel mechanism is designed and fabricated. This system is composed of 49 concentrating cells, which are arranged in a 7 × 7 array. The array consists of 48 sunlight-collecting cells and a sun position sensor using direct focus detection. A linear actuator, which is composed of two stepper motors and two roller screws, is used to drive the concentrating array to track the sun with the movement in a plane parallel to the plane containing the array of fiber optic collecting aperture. The solid angle of the sun tracking angle range for the concentrating cells is 4π/3 sr (covering 2/3 of the sky), satisfying the demand for 8 h of tracking. This system is suitable for building integration because it has a compact and flat shape. The sun position sensor consists of photodiodes and a fiber array in the shape of a cross. The sun position sensor can directly measure the high flux density of the focus (2500 suns). A series of tests were performed using a lux meter and spectrometer to investigate the photometric characteristics of the system for a lightless underpass of 8.6 m × 4.2 m × 2.3 m. The experiments show that the transfer efficiency of this system can reach 25% (with a 10-m long fiber). The luminous efficacy can reach 250 lum/W, which is two times than that of natural light because the fiber can filter out infrared light. The experiments also verified the feasibility of the daylighting system using the parallel mechanism and a direct detection device for highly concentrated light.
Jifeng Song; Zhou Jin; Yong Zhu; Zili Zhou; Yongping Yang. Development of a fiber daylighting system based on the parallel mechanism and direct focus detection. Solar Energy 2015, 115, 484 -493.
AMA StyleJifeng Song, Zhou Jin, Yong Zhu, Zili Zhou, Yongping Yang. Development of a fiber daylighting system based on the parallel mechanism and direct focus detection. Solar Energy. 2015; 115 ():484-493.
Chicago/Turabian StyleJifeng Song; Zhou Jin; Yong Zhu; Zili Zhou; Yongping Yang. 2015. "Development of a fiber daylighting system based on the parallel mechanism and direct focus detection." Solar Energy 115, no. : 484-493.
Pressure and temperature levels within a modern internal combustion engine cylinder have been pushing at the limits of traditional materials and design. These operative conditions are due to the stringent emission and fuel economy standards that are forcing automotive engineers to develop engines with much higher power density ratios. In this scenario, downsized, turbocharged engines are an important technology to meet the future demands on transport efficiency. It is well known that within downsized turbocharged gasoline engines, thermal management becomes a vital issue for durability and combustion stability. In order to contribute to the understanding of engine thermal management, a conjugate heat transfer analysis of a downsized gasoline piston engine has been performed. The intent was to study the design possibilities afforded by the use of the Selective Laser Melting (SLM) additive manufacturing process. Thus, the study here considers the original aluminium piston with added cooling galleries and weight-saving lattice structures that can be achieved using SLM. An oil cooling gallery was introduced near the piston crown to allow a temperature reduction on the top land and a more homogeneous temperature distribution across the crown. Better temperature control should allow the combustion process to be less sensitive to knocking and pre-ignition. In addition, a shift in top ring groove due to better cooling will help to reduce crevice volume thereby reducing engine emissions. The ultimate aim is to show that this new additive manufacturing technique applied to piston design could be used to enable further downsizing for fuel economy by increasing engine compression ratio and boost pressure with improved combustion stability and phasing
Miguel Angel Reyes Belmonte; Colin D. Copeland; Drummond Hislop; George Hopkins; Adrian Schmieder; Scott Bredda; Sam Akehurst. Improving Heat Transfer and Reducing Mass in a Gasoline Piston Using Additive Manufacturing. SAE Technical Paper Series 2015, 1 .
AMA StyleMiguel Angel Reyes Belmonte, Colin D. Copeland, Drummond Hislop, George Hopkins, Adrian Schmieder, Scott Bredda, Sam Akehurst. Improving Heat Transfer and Reducing Mass in a Gasoline Piston Using Additive Manufacturing. SAE Technical Paper Series. 2015; ():1.
Chicago/Turabian StyleMiguel Angel Reyes Belmonte; Colin D. Copeland; Drummond Hislop; George Hopkins; Adrian Schmieder; Scott Bredda; Sam Akehurst. 2015. "Improving Heat Transfer and Reducing Mass in a Gasoline Piston Using Additive Manufacturing." SAE Technical Paper Series , no. : 1.