A Device for Converting Kinetic Energy of Press Into Electric Power as a Means of Energy Saving

A residential cogeneration system (CGS) is highlighted because of its efficient energy usage on both the supplier and consumer sides. It generates electricity and heat simultaneously; however, there is insufficient information on the efficiency according to the condition of usage. In this study, we analysed the performance data measured by the home energy management system (HEMS) and the lifestyle data of residents in a condominium of 356 flats where fuel cell CGS was installed in each flat. The electricity generated by CGS contributed to an approximately 12% reduction in primary energy consumption and CO2 emission, and the rate of generation by the CGS in the electric power demand (i.e., contribution rate) was approximately 38%. The electricity generation was mainly affected by the use of electricity up to 4 MWh/household/year. Gas or water use also impacted electric power generation, with water use as the primary factor affecting the contribution rate. Electric power generation changes monthly, mainly based on the water temperature. From these results, we confirmed that a CGS has substantial potential to reduce energy consumption and CO2 emission in condominiums. Thus, it is recommended for installation of fuel cell CGS in existing and new buildings to contribute to the energy-saving target of the Japanese Government in the residential sector.

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Ionic Wind Application to Vortex Ring Generator and its Transportation Efficiency

Volume 1: Fluid Mechanics ◽

10.1115/ajkfluids2019-5141 ◽

2019 ◽

Author(s):

Kengo Fukunaga ◽

Masayoshi Satake ◽

Noboru Maeda ◽

Kazushi Shikata ◽

Tomohisa Ezaka

Keyword(s):

Kinetic Energy ◽

Mechanical System ◽

Electric Power ◽

Vortex Ring ◽

Energy Conversion Efficiency ◽

Target Distance ◽

Vortex Rings ◽

Experimental Measurements ◽

Ionic Wind ◽

External Turbulence

Abstract In this study, ionic wind generated in corona discharge is focused for producing an air flow without having mechanical actuators. First, the kinetic energy conversion efficiency to ionic wind from electric power is experimentally estimated to be 0.32%. Then, it is confirmed that intermittent blows of ionic wind enable to produce vortex rings without using mechanical system. We adopt novel sub-chamber structure to avoid the concentration of the substance in a vortex ring low, so that the substance concentration transported to the target distance of 200 mm increases by 9%. As an application, the efficiency for moisture transportation is evaluated through experimental measurements. As a result, it is shown that the substance (moisture) can be transported at an efficiency of about 85% to target distance of 200 mm under conditions where the influence of external turbulence is small.

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Kinematic Design of Mechanisms for the Control of an Oscillating Wing

Volume 8: 31st Mechanisms and Robotics Conference, Parts A and B ◽

10.1115/detc2007-34580 ◽

2007 ◽

Author(s):

Louis-Alexis Allen Demers ◽

Cle´ment Gosselin

Keyword(s):

Kinetic Energy ◽

Mechanical System ◽

Electric Power ◽

Additional Function ◽

Kinematic Design

This work is part of a project which aims at the development of underwater generators using oscillating wings. One of the important challenges in the design of a system collecting the kinetic energy of a fluid is the transformation of this energy into electric power [1]. Since it is not possible to pass directly from the movement of a fluid to electric power, it is necessary to conceive an intermediate mechanical system. Its function is to convert the kinetic energy of the fluid into kinetic energy of a mechanism capable of converting kinetic energy into electric power. In this work, the mechanical system also has an additional function, i.e., to guide the orientation of the blades (wings) throughout the cycle of movement in order to maximize the efficiency.

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Energy efficient heat supply system for electric power facilities

E3S Web of Conferences ◽

10.1051/e3sconf/201912401011 ◽

2019 ◽

Vol 124 ◽

pp. 01011

Author(s):

K. H. Gilfanov ◽

N. Tien ◽

R. N. Gaynullin ◽

I. Hallyyev

Keyword(s):

Energy Saving ◽

Electric Power ◽

Heat Recovery ◽

Heat Supply ◽

Eddy Currents ◽

Computer Modelling ◽

Short Circuit ◽

Heat Supply System ◽

Supply System ◽

Heat Extraction

The aim of the work is to confirm the possibility of creating an energy-saving heat supply system for power facilities by using computer modelling, analysis of the potential use of heat losses of electromagnetic energy in magnetic circuits and windings of transformers of substations, as well as the development of schemes for heat recovery losses for heat supply of power facilities. Computer simulation of electromagnetic and thermophysical processes in the power oil-filled transformer is carried out. Energy losses in windings, hysteresis and eddy currents in the magnetic circuit, as well as temperature and heat flux fields in the longitudinal and transverse sections of the oil-filled power transformer in idle and short-circuit modes were determined. The transformer performance in terms of heat recovery losses was evaluated. The possible volumes of heat extraction for heat supply depending on the power of the transformer are determined. The automated oil-water system of heat recovery of the transformer for heating of electric power facilities is proposed. The significance of the obtained results for the construction industry is to confirm the possibility of creating an energy-saving heat supply system for electric power facilities while maintaining the operational characteristics of the transformer based on computer modelling; the significant potential of using the heat loss of power transformers of substations is shown, an automated heat supply system for electric power facilities is proposed.

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