The Experts below are selected from a list of 219 Experts worldwide ranked by ideXlab platform

Jianhui Zhang - One of the best experts on this subject based on the ideXlab platform.

  • principle and experimental verification of caudal fin type piezoelectric stack pump with variable cross section oscillating vibrator
    Chinese Journal of Mechanical Engineering, 2012
    Co-Authors: Jianhui Zhang, Yi Huang, Qixiao Xia, Weiqing Huang, Chunsheng Zhao
    Abstract:

    In the traditional Flow-resistance-differential (FRD) type valve-less piezoelectric pump, the generated outFlow and pressure are discontinuous because of the inherent periodicity and Fluctuation of the pump. To overcome these drawbacks, utilizing the bending vibration of piezoelectric bimorph to drive fluid was conducted. However, our investigation on the current status of this piezoelectric bimorph pump shows that larger driving force and vibration amplitude are required for fluid pumping; the pumping can be realized through the centrifugal force; and the mechanism of fluid pumping is no longer further studied. Based on these cases, the paper designed a piezoelectric-stack pump with variable-cross-section oscillating (VCSO) vibrator by imitating the swing of the caudal-fin of tuna, and the pump is neither the rotating type nor the volumetric type according to the taxonomy. The interaction between the oscillating vibrator and the fluid parcel is firstly analyzed from the viewpoint of momentum conservation, and the analytical expression of pump Flow rate is obtained. Then the modal and harmonic response analyses on the vibrator immerged in water are carried out. From the analyses the first two orders resonance frequencies are 832 Hz and 1 939 Hz, respectively, and the peak value of the tip amplitude is 0.6 mm. Laser Doppler vibrometer is used to measure both the frequency and vibration amplitude, and the determined first two orders resonance frequencies are 617 Hz and 1 356 Hz, respectively. The measured tip amplitude reaches to the peak value of 0.3 mm. At last, experimental measurement for the Flow rates with different driving frequencies is conducted. The results show that the Flow rate can reach 560 mL/min at 1 370 Hz when the pump runs under the backpressure of 30 mm water column. And the Flow rate is as much as 560% of that of experiment results carried out by researchers from Brazil. The proposed pump innovates in both theory and taxonomy; in addition, the pump overcomes the drawbacks such as large Flow Fluctuation and low Flow rate in the traditional FRD type pumps, which will help to broaden the application of the valve-less piezoelectric pump.

  • theoretical and experimental research of caudal fin type piezoelectric stack pump with variable cross section oscillating vibrato
    International Conference on Mechatronics and Automation, 2011
    Co-Authors: Xiaoguang Lin, Jianhui Zhang
    Abstract:

    In this paper, a piezoelectric-stack pump with variable-cross-section oscillating (VCSO) vibrator is proposed, which imitates the swing of the caudal-fin of tuna, and the pump is neither the rotating type nor the volumetric type according to the taxonomy. The interaction between the oscillating vibrator and the fluid parcel is firstly analyzed from the viewpoint of momentum conservation, and the analytical expression of pump Flow rate is obtained. At last, experimental measurement for the Flow rates with different driving frequencies is conducted. The results show that the Flow rate can reach 560 ml/min at 1370 Hz when the pump runs under the backpressure of 30 mm water column. And the Flow rate is as much as 560% of that of experiment results carried out by Cicero R. De Limaa. The proposed pump innovates in both theory and taxonomy. In addition, the pump overcomes the drawbacks such as large Flow Fluctuation and low Flow rate in the traditional FRD type pumps, which will help to broaden the applications of the valve-less piezoelectric pump.

Chulhwan Kim - One of the best experts on this subject based on the ideXlab platform.

  • Optimal operation of DC smart house system by controllable loads based on smart grid topology
    Renewable Energy, 2012
    Co-Authors: Kenichi Tanaka, Atsushi Yona, Tomonobu Senjyu, Kazuki Ogimi, Toshihisa Funabashi, Akihiro Yoza, Chulhwan Kim
    Abstract:

    From the perspective of global warming mitigation and depletion of energy resources, renewable energy such as wind generation (WG) and photovoltaic generation (PV) are getting attention in distribution systems. Additionally, all-electric apartment houses or residence such as DC smart houses are increasing. However, due to the fluctuating power from renewable energy sources and loads, supply-demand balancing of power system becomes problematic. Smart grid is a solution to this problem. This paper presents a methodology for optimal operation of a smart grid to minimize the interconnection point power Flow Fluctuation. To achieve the proposed optimal operation, we use distributed controllable loads such as battery and heat pump. By minimizing the interconnection point power Flow Fluctuation, it is possible to reduce the electric power consumption and the cost of electricity. This system consists of photovoltaic generator, heat pump, battery, solar collector, and load. To verify the effectiveness of the proposed system, results are used in simulation presented.

  • optimal operation by controllable loads based on smart grid topology considering insolation forecasted error
    IEEE Transactions on Smart Grid, 2011
    Co-Authors: Kenichi Tanaka, Atsushi Yona, Kousuke Uchida, Kazuki Ogimi, Tomonori Goya, T Senjy, Toshihisa Funabashi, Chulhwan Kim
    Abstract:

    From the perspective of global warming mitigation and depletion of energy resources, renewable energy such as wind generation (WG) and photovoltaic generation (PV) are getting attention in distribution systems. Additionally, all electric apartment houses or residence such as dc smart houses are increasing. However, due to the fluctuating power from renewable energy sources and loads, supply-demand balancing of power system becomes problematic. The smart grid is a solution to this problem. This paper presents a methodology for optimal operation of a smart grid to minimize the interconnection point power Flow Fluctuation. To achieve the proposed optimal operation, we use distributed controllable loads such as battery and heat pump. By minimizing the interconnection point power Flow Fluctuation, it is possible to reduce the electric power consumption and the cost of electricity. This system consists of a photovoltaic generator, heat pump, battery, solar collector, and load. To verify the effectiveness of the proposed system, results are used in simulation presented.

Xiaoguang Lin - One of the best experts on this subject based on the ideXlab platform.

  • theoretical and experimental research of caudal fin type piezoelectric stack pump with variable cross section oscillating vibrato
    International Conference on Mechatronics and Automation, 2011
    Co-Authors: Xiaoguang Lin, Jianhui Zhang
    Abstract:

    In this paper, a piezoelectric-stack pump with variable-cross-section oscillating (VCSO) vibrator is proposed, which imitates the swing of the caudal-fin of tuna, and the pump is neither the rotating type nor the volumetric type according to the taxonomy. The interaction between the oscillating vibrator and the fluid parcel is firstly analyzed from the viewpoint of momentum conservation, and the analytical expression of pump Flow rate is obtained. At last, experimental measurement for the Flow rates with different driving frequencies is conducted. The results show that the Flow rate can reach 560 ml/min at 1370 Hz when the pump runs under the backpressure of 30 mm water column. And the Flow rate is as much as 560% of that of experiment results carried out by Cicero R. De Limaa. The proposed pump innovates in both theory and taxonomy. In addition, the pump overcomes the drawbacks such as large Flow Fluctuation and low Flow rate in the traditional FRD type pumps, which will help to broaden the applications of the valve-less piezoelectric pump.

Kenichi Tanaka - One of the best experts on this subject based on the ideXlab platform.

  • Optimal operation of DC smart house system by controllable loads based on smart grid topology
    Renewable Energy, 2012
    Co-Authors: Kenichi Tanaka, Atsushi Yona, Tomonobu Senjyu, Kazuki Ogimi, Toshihisa Funabashi, Akihiro Yoza, Chulhwan Kim
    Abstract:

    From the perspective of global warming mitigation and depletion of energy resources, renewable energy such as wind generation (WG) and photovoltaic generation (PV) are getting attention in distribution systems. Additionally, all-electric apartment houses or residence such as DC smart houses are increasing. However, due to the fluctuating power from renewable energy sources and loads, supply-demand balancing of power system becomes problematic. Smart grid is a solution to this problem. This paper presents a methodology for optimal operation of a smart grid to minimize the interconnection point power Flow Fluctuation. To achieve the proposed optimal operation, we use distributed controllable loads such as battery and heat pump. By minimizing the interconnection point power Flow Fluctuation, it is possible to reduce the electric power consumption and the cost of electricity. This system consists of photovoltaic generator, heat pump, battery, solar collector, and load. To verify the effectiveness of the proposed system, results are used in simulation presented.

  • optimal operation by controllable loads based on smart grid topology considering insolation forecasted error
    IEEE Transactions on Smart Grid, 2011
    Co-Authors: Kenichi Tanaka, Atsushi Yona, Kousuke Uchida, Kazuki Ogimi, Tomonori Goya, T Senjy, Toshihisa Funabashi, Chulhwan Kim
    Abstract:

    From the perspective of global warming mitigation and depletion of energy resources, renewable energy such as wind generation (WG) and photovoltaic generation (PV) are getting attention in distribution systems. Additionally, all electric apartment houses or residence such as dc smart houses are increasing. However, due to the fluctuating power from renewable energy sources and loads, supply-demand balancing of power system becomes problematic. The smart grid is a solution to this problem. This paper presents a methodology for optimal operation of a smart grid to minimize the interconnection point power Flow Fluctuation. To achieve the proposed optimal operation, we use distributed controllable loads such as battery and heat pump. By minimizing the interconnection point power Flow Fluctuation, it is possible to reduce the electric power consumption and the cost of electricity. This system consists of a photovoltaic generator, heat pump, battery, solar collector, and load. To verify the effectiveness of the proposed system, results are used in simulation presented.

Bharat B Biswal - One of the best experts on this subject based on the ideXlab platform.

  • clinical application of basal regional cerebral blood Flow Fluctuation measurements by fmri
    Advances in Experimental Medicine and Biology, 1998
    Co-Authors: V M Haughton, Bharat B Biswal
    Abstract:

    Regional cerebral blood Flow fluctuates in the absence of any external stimulus or definable cognitive activity. The Fluctuations under considerations are slow, rhythmic changes in capillary and arteriolar blood Flow that are unrelated to cardiac or respiratory cycles. The purpose of this communication is to review the experimental observations on Fluctuations in animals and in humans and describe the possible clinical applications of continuous regional cerebral blood Flow measurements. Clinical applications of FMRI to measure regional cerebral blood Flow are anticipated in the evaluation of stroke, epilepsy and psychiatric disorders. The objective of this section is to suggest directions for future research which will benefit clinical medicine. This section is intended to illustrate the perspective of a clinical radiologist on blood Flow Fluctuations. Therefore, other reports such as those of Hudetz, Vern, Golanov, Mayer in this symposium must be consulted for more complete analysis of the blood Flow Fluctuations.