A New Heat Supply System of Cogeneration for the Local Community

Yamaguchi, Hideki; Hisazumi, Yoshinori; Asano, Hitoshi; Morita, Hikaru; Hori, Takuma; Matsumoto, Toshiki; Abiko, Tetsuo

doi:10.1299/jpes.2.1085

Cited by 7 publications

(3 citation statements)

References 2 publications

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“…The quasi one-dimensional MHD theory [1][2] tells us that performance characteristics of a diagonal-type, nonequilibrium MHD generator are similar to the performance characteristics of a Faraday-type MHD generator. However, the quasi one-dimensional MHD theory is only relevant when talking about the boundary conditions of the working gas plasma, and does not accurately reflect the spatial nonuniformity effects in a cross-section of the generator's channel.…”

Section: Introductionmentioning

confidence: 99%

Numerical Calculations and Analyses in Diagonal Type Magnetohydrodynamic Generator

Kien¹

2013

Journal of Electrical Engineering and Technology

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-This paper examines the effects of magnetic induction attenuation on current distribution in the exit regions of the Faraday-type, non-equilibrium plasma Magnetohydrodynamic (MHD) generator by numerical calculation using cesium-seeded helium. Calculations show that reasonable magnetic induction attenuation creates a very uniform current distribution near the exit region of generator channel. Furthermore, it was determined that the current distribution in the middle part of generator is negligible, and the output electrodes can be used without large ballast resistors. In addition, the inside resistance of the exit region and the current concentration at the exit electrode edges, both decrease with the attenuation of magnetic flux density. The author illustrates that the exit electrodes of the diagonal Faraday-type, non-equilibrium plasma MHD generator should be arranged in the attenuation region of the magnetic induction, in order to improve the electrical parameters of the generator.

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Section: Introductionmentioning

confidence: 99%

Numerical Calculations and Analyses in Diagonal Type Magnetohydrodynamic Generator

Kien¹

2013

Journal of Electrical Engineering and Technology

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“…Already it has been ascertained that the performance characteristics of a diagonal type non-equilibrium plasma generator can be well approached to those of the Faraday type one by the quasi one-dimensional MHD theory [1,2].…”

Section: Introductionmentioning

confidence: 99%

Analyses on the effect of magnetic induction attenuation on the current distribution in a Faraday MHD generator

Le¹

2013

Sci. Tech. Dev. J.

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This paper examines the dependence of the attenuation of magnetic induction on the current distribution etc. in the exit regions of the Faraday type non-equilibrium plasma MHD generator by a two-dimensional calculation. The numerical analyses are made for an example of the cesium-seeded helium. As a result, a reasonable magnetic induction attenuation can make the distribution of current very uniform near the exit region of generator channel and has little influence on the current distribution in the middle part of generator, and the output electrodes can be used without great ballast resistors. Also the inside resistance of the exit region and the current concentration at the exit electrode edges decrease with the attenuation of magnetic flux density. By the author's examination, it is made clear that the exit electrodes of the diagonal Faraday type non-equilibrium plasma MHD generator should be arranged in the attenuation region of the magnetic induction, since arranging them in this region becomes useful for the improvement of the electrical parameters of generator.

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“…In previous studies, we developed a heat storage unit equipped with a hot water supply, floor heating, and bath heating function to be installed in each household [], [], conducted a verification test to introduce the NCG system to seven households in an experimental condominium (NEXT21 []) in Osaka City for two years beginning May 2007, and demonstrated that the system could supply sufficient heat to meet demand throughout the year [], []. The verification test was only conducted for seven households; however, it is aimed to introduce the NCG system to an apartment building of 20 or more households in which heat demand can be expected to be leveled out.…”

Section: Introductionmentioning

confidence: 99%

Energy supply performance and environmental load‐reduction effect of a cogeneration system for an apartment building using distributed heat storage technology

Yamaguchi

Morita

Asano

et al. 2011

Heat Trans. Asian Res.

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In order to make distributed generation systems for apartment buildings economically viable, it is essential to develop an efficient and low‐cost heat supply system. We are developing a new cogeneration system (Neighboring CoGeneration system: NCG system). The key concept of this system is to install a heat storage unit for the hot water supply, floor heating, and bath heating in each house, and to connect the heat storage units by a single‐loop hot water pipe. The system leads to time leveling of the total heat supply and reduced installation costs. Furthermore, it is expected that the cogeneration can operate according to electrical demand because of the large heat storage capacity of the system. In this study, a dynamic simulation model is developed to evaluate the performance and environmental load‐reduction effect of the NCG system for 50 households. The results show that the NCG system can supply sufficient heat for peak demand in winter and reduce annual CO2 emissions by 23% on average. © 2013 Wiley Periodicals, Inc. Heat Trans Asian Res, 42(8): 745–757, 2013; Published online in Wiley Online Library (http://wileyonlinelibrary.com/journal/htj). DOI 10.1002/htj.20376

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A New Heat Supply System of Cogeneration for the Local Community

Cited by 7 publications

References 2 publications

Numerical Calculations and Analyses in Diagonal Type Magnetohydrodynamic Generator

Numerical Calculations and Analyses in Diagonal Type Magnetohydrodynamic Generator

Analyses on the effect of magnetic induction attenuation on the current distribution in a Faraday MHD generator

Energy supply performance and environmental load‐reduction effect of a cogeneration system for an apartment building using distributed heat storage technology

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