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Operation Strategy Analysis and Configuration Optimization of Solar CCHP System
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作者 Duojin Fan Chengji Shi +1 位作者 Kai Sun Xiaojuan Lu 《Energy Engineering》 EI 2021年第4期1197-1221,共25页
This paper proposed a new type of combined cooling heating and power(CCHP)system,including the parabolic trough solar thermal(PTST)power generation and gas turbine power generation.The thermal energy storage subsystem... This paper proposed a new type of combined cooling heating and power(CCHP)system,including the parabolic trough solar thermal(PTST)power generation and gas turbine power generation.The thermal energy storage subsystem in the PTST unit provides both thermal energy and electrical energy.Based on the life cycle method,the configuration optimization under eight operation strategies is studied with the economy,energy,and environment indicators.The eight operation strategies include FEL,FEL-EC,FEL-TES,FEL-TES&EC,FTL,FTL-EC,FTL-TES,and FTL-TES&EC.The feasibility of each strategy is verified by taking a residential building cluster as an example.The indicators under the optimal configuration of each strategy are compared with that of the separate production(SP)system.The results showed that the PTST-CCHP system improves the environment and energy performance by changing the ratio of thermal energy and electric energy.The environment and energy indicators of FEL-TES&EC are superior to those of FTL-TES&EC in summer,and the results are just the opposite in winter.The initial annual investment of the PTST-CCHP system is higher than that of the SP system,but its economic performance is better than that of the SP system with the increase of life-cycle. 展开更多
关键词 Combined cooling heating and power(CCHP)system trough solar thermal power generation operation strategy optimization configuration hill-climbing algorithm(HCA)
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Small Angle X-Ray Scattering Imaging of Soft Tissue by Using Laue Diffraction Optical System
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作者 Ge Jin Kenichi Okamura +3 位作者 Yoshifumi Suzuki Yong Sun Yoshinori Chikaura Masami Ando 《Open Journal of Medical Imaging》 2018年第3期54-63,共10页
We performed a feasibility study of Small angle X-ray scattering imaging under the condition of X-ray bright field imaging by Laue crystal diffraction optics of X-ray dark-field imaging that works as an angular analys... We performed a feasibility study of Small angle X-ray scattering imaging under the condition of X-ray bright field imaging by Laue crystal diffraction optics of X-ray dark-field imaging that works as an angular analysis. Collagen in chicken tibia containing abundant soft fibrous tissue was chosen as a specimen. In traditional Small angle X-ray scattering optical system, we can derive the structure information of sample by calculating q value which is available from a scattering pattern. Thus it is usually necessary to conduct a 2D scan in order to obtain scattering image. In this paper it is described by a method by which not only small angle X-ray scattering imaging is available directly but also bright-field imaging and dark-field imaging can be obtained at the same time. As the first step, the feasibility of the imaging method should be confirmed by taking pictures of the samples with known periodic length. The preliminary test showed that the collgan’s lattice spacing d is 65.1 nm that was also taken photos by scanning electron microscopy. By rotating Laue angular analyzer by 112 arcseconds small angle X-ray scattering image appeared in bright-field. 展开更多
关键词 XDFI SAXS SYNCHROTRON RADIATION SOFT TISSUE
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LiB Electrode Ageing Observed from PVdF Binder
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作者 Masamichi Sakaino Syogo Hatake +2 位作者 Yong Sun Fumio Morimoto Kenta Kirimoto 《Materials Sciences and Applications》 2014年第11期767-782,共16页
Ageing behaviors of the positive electrode of lithium ion battery are characterized by measuring mechanical properties of the electrode reeds, such as resonance frequency and internal friction, as a function of temper... Ageing behaviors of the positive electrode of lithium ion battery are characterized by measuring mechanical properties of the electrode reeds, such as resonance frequency and internal friction, as a function of temperature. In the measurements of the electrode reeds with a sandwich structure of active material film and current collector of Al foil, two thermally-activated relaxation processes can be observed on the polyvinylidene difluoride binder in the active material film. Namely, a surface-related relaxation at ~150 K and a relaxation corresponding to the β-phase transition at ~240 K in the polymer binder can be observed at high signal/noise ratio. The resonance frequency decreases and the internal friction increases after charge/discharge cycling. The changes in activation energies of the relaxation processes also indicate that the measurement of mechanical properties of the positive electrode is an effective method for characterizing ageing behaviors of the positive electrode as a whole. 展开更多
关键词 LiB POSITIVE ELECTRODE Mechanical Properties Internal Friction RESONANCE Frequency
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Schottkey Barrier Measurement of Nanocrystalline Lu<sub>3</sub>N@C<sub>80</sub>/Au Contact
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作者 Yong Sun Yusuke Hattori +2 位作者 Masamichi Sakaino Fumio Morimoto Kenta Kirimoto 《Materials Sciences and Applications》 2013年第12期808-815,共8页
Electrical and structural properties of nanocrystalline solids of C80 fullerene encapsulated with a Lu3N cluster, Lu3N@C80, have been studied by measuring x-ray photoemission spectra, x-ray diffraction, and current-vo... Electrical and structural properties of nanocrystalline solids of C80 fullerene encapsulated with a Lu3N cluster, Lu3N@C80, have been studied by measuring x-ray photoemission spectra, x-ray diffraction, and current-voltage characteristics of the Lu3N@C80/Au Schottky contact in the temperature range of 300 - 500 K. The nanocrystalline solid sample of Lu3N@C80 fullerene consists of grains characterized with an fcc structure and those grains become larger in size after pressing the powder sample at 1.25 GPa. The current-voltage characteristics measured at various temperatures showed that there are no significant dependences on both the Schottky barrier and the carrier mobility on electric field. The Schottky barrier of the Lu3N@C80/Au contact is determined to be 0.71 ± 0.04 eV. 展开更多
关键词 Lu3N@C80 NANOCRYSTALLINE SCHOTTKY Barrier Mobility
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Transitional behaviour between biphasic lubrication and soft elastohydrodynamic lubrication of poly(vinyl alcohol)hydrogel using microelectromechanical system pressure sensor 被引量:1
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作者 Nobuo Sakai Seido Yarimitsu +2 位作者 Yoshinori Sawae Mochimitsu Komori Teruo Murakami 《Biosurface and Biotribology》 EI 2018年第1期24-33,共10页
The soft hydrogel material is expected for a candidate material as biomimetic artificial cartilage with synergisticfunctionalities of adaptive multimode lubrication.In boundary lubrication mode of hydrogel material,th... The soft hydrogel material is expected for a candidate material as biomimetic artificial cartilage with synergisticfunctionalities of adaptive multimode lubrication.In boundary lubrication mode of hydrogel material,the biphasiclubrication mechanism cooperatively exerts its functionality.In hydrodynamic lubrication mode,it is preferable that thelubricating surfaces be impermeable to trap the fluid pressure in contact surfaces,whereas the actual biphasic materiallike a hydrogel is a permeable material with surface porosity.lt is indicated that the interstitial fluid pressurisation inthe permeable biphasic material can contribute to significant fluid load support under lower sliding speed condition.So,the authors examined how the contrary fluid pressure effect appears in the transition from the boundarylubrication mode to soft elastohydrodynamic lubrication mode.In the experiment,a small pressure sensor was utilisedto measure the in-situ fluid pressure in sliding condition.Although the experimental condition of this study wasselective,the result showed a possibility of the negative effect of the biphasic surface,in which the permeable surfacediminished the hydrodynamic fluid pressure.This means that one should manage and enhance the biphasic lubricationabilities in wide operation range when the hydrogel material was used as a load bearing material. 展开更多
关键词 HYDROGEL BEHAVIOUR SYNERGISTIC
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Influence of synovia constituents on tribological behaviors of articular cartilage 被引量:9
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作者 Teruo MURAKAMI Seido YARIMITSU +2 位作者 Kazuhiro NAKASHIMA Yoshinori SAWAE Nobuo SAKAI 《Friction》 SCIE EI CAS 2013年第2期150-162,共13页
The extremely low friction and minimal wear in natural synovial joints appear to be established by effective lubrication mechanisms based on appropriate combination of articular cartilage and synovial fluid.The comple... The extremely low friction and minimal wear in natural synovial joints appear to be established by effective lubrication mechanisms based on appropriate combination of articular cartilage and synovial fluid.The complex structure of cartilage composed of collagen and proteoglycan with high water content contributes to high load-carrying capacity as biphasic materials and the various constituents of synovial fluid play important roles in various lubrication mechanisms.However,the detailed differences in functions of the intact and damaged cartilage tissues,and the interaction or synergistic action of synovia constituents with articular cartilage have not yet been clarified.In this study,to examine the roles of synovia constituents and the importance of cartilage surface conditions,the changes in friction were observed in the reciprocating tests of intact and damaged articular cartilage specimens against glass plate lubricated with lubricants containing phospholipid,protein and/or hyaluronic acid as main constituents in synovial fluid.The effectiveness of lubricant constituents and the influence of cartilage surface conditions on friction are discussed.In addition,the protectiveness by synovia constituents for intact articular cartilage surfaces is evaluated. 展开更多
关键词 articular cartilage synovial fluid synovial joint LUBRICATION BIOTRIBOLOGY
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Micro-optical fabrication by ultraprecision diamond machining and precision molding 被引量:2
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作者 Likai LI Neil J. NAPLES +1 位作者 Jeffrey W. ROBLEE Allen Y. YI 《Frontiers of Mechanical Engineering》 SCIE CSCD 2017年第2期181-192,共12页
Ultraprecision diamond machining and high volume molding for affordable high precision high performance optical elements are becoming a viable process in optical industry for low cost high quality microoptical compone... Ultraprecision diamond machining and high volume molding for affordable high precision high performance optical elements are becoming a viable process in optical industry for low cost high quality microoptical component manufacturing. In this process, first high precision microoptical molds are fabricated using ultraprecision single point diamond machining followed by high volume production methods such as compression or injection molding. In the last two decades, there have been steady improvements in ultraprecision machine design and performance, particularly with the introduction of both slow tool and fast tool servo. Today optical molds, including freeform surfaces and microlens arrays, are routinely diamond machined to final finish without post machining polishing. For consumers, compression mold- ing or injection molding provide efficient and high quality optics at extremely low cost. In this paper, first ultrapreci- sion machine design and machining processes such as slow tool and fast too servo are described then both compression molding and injection molding of polymer optics are discussed. To implement precision optical manufacturing by molding, numerical modeling can be included in the future as a critical part of the manufacturing process to ensure high product quality. 展开更多
关键词 ultraprecision machining slow tool servo fast tool servo compression molding injection molding microlens arrays optical fabrication
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Relationship between microstructure and magnetic domain structure of Nd-Fe-B melt-spun ribbon magnets
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作者 Masaaki TAKEZAWA Hiroyuki TANEDA Yuji MORIMOTO 《Frontiers of Materials Science》 SCIE CSCD 2015年第2期206-210,共5页
The relation between the microstructure, observed using an electron probe microanalyzer, and the domain structure, observed using a Kerr microscope, was established to evaluate the effects of hot rolling and the addit... The relation between the microstructure, observed using an electron probe microanalyzer, and the domain structure, observed using a Kerr microscope, was established to evaluate the effects of hot rolling and the addition of Ti-C on the c-axis orientation and the magnetization process of hot-rolled Nd-Fe-B-Ti-C melt-spun ribbons. The addition of Ti-C promotes the c-axis orientation and high coercivity in the ribbons. Elemental mapping suggests a uniform elemental distribution; however, an uneven distribution of Ti was observed in an enlarged grain with Ti-enriched points inside the grain. The reversal domains that nucleated at the Ti-enriched point inside the grain cause low coercivity. 展开更多
关键词 magnetic domain MICROSTRUCTURE Kerr effect microscope magneto-optical effect Nd-Fe-B permanent magnet
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Erratum to: Influence of synovia constituents on tribological behaviors of articular cartilage
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作者 Teruo MURAKAMI Seido YARIMITSU +2 位作者 Kazuhiro NAKASHIMA Yoshinori SAWAE Nobuo SAKAI 《Friction》 SCIE EI CAS 2014年第4期391-391,共1页
Erratum to Friction 1(2):150-162(2013)DOI 10.1007/s40544‐013‐0010‐6 The original version of this article unfortunately contained the incorrect lengend“HA 0.5 wt%+DPPC 0.01 wt%+albumin 1.4 wt%”in Fig.7 on page 155... Erratum to Friction 1(2):150-162(2013)DOI 10.1007/s40544‐013‐0010‐6 The original version of this article unfortunately contained the incorrect lengend“HA 0.5 wt%+DPPC 0.01 wt%+albumin 1.4 wt%”in Fig.7 on page 155,instead of. 展开更多
关键词 FRICTION TRIBOLOGICAL BEHAVIORS
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