著者

本間 優 土肥 哲哉 吉田 好邦

出版者

一般社団法人 エネルギー・資源学会

雑誌

エネルギー・資源学会論文誌 (ISSN:24330531)

巻号頁・発行日

vol.37, no.6, pp.23-31, 2016 (Released:2019-02-08)

参考文献数

42

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The objective of this study is to evaluate an agrivoltaic system by reflecting the deterioration of rice yield and quality. The agrivoltaic system means introducing photovoltaic power to agricultural fields. By the notification from Ministry of Agriculture, introducing renewable energy to agricultural fields became limitedly possible. However, current agrivoltaic pioneers do not always consider crop quality deterioration brought from a total life cycle shading. We evaluate a deterioration of growing in a paddy field in Chiba prefecture in Japan. Heading time delayed significantly under the shading condition. Number of ears and weight per an ear were also significantly less under PV panels. Utilizing measured data, we modified the conventional crop model, which simulates rice yield, quality and economic efficiency under the shading weather condition. A 20 percent shading reduces the yield by approximately 20 percent. Number of ears per root accounts for 84 percent of the yield, which indicates early period of the growth needs enough amount of solar radiation for improving the rice growth.

著者

河野 孝史 松橋 隆治 吉田 好邦 浅野 浩志

出版者

一般社団法人 日本エネルギー学会

雑誌

日本エネルギー学会誌 (ISSN:09168753)

巻号頁・発行日

vol.89, no.2, pp.150-156, 2010 (Released:2010-03-11)

参考文献数

11

被引用文献数

1

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The acceleration of diffusion of the DER (distributed energy resources) is hoped for because of the promotion for highly effective use of energy, especially in the house and commercial section in Japan. From this point of view, it is necessary to focus on the feature of DER such as intermittent renewable resources, low quality and low density. The purpose of our study is to clarify the demand of multi (involved low) quality energy and to solve the problem which is optimization of the energy network supply system whose alternative is DER system and large power grid. For these reasons, in this paper, we drew up and sent out questionnaires and analyzed them by CVM. After we evaluated the potential of the multi-quality energy supplying system, we concluded that low energy quality have enough possibility to supply for some of the home appliance.

著者

松橋 隆治 吉田 好邦 石谷 久

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.122, no.11, pp.1976-1985, 2002-11-01 (Released:2008-12-19)

参考文献数

9

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In this article, we investigated possibility to establish a recycling-based industrial system in Japan. For this purpose, a novel mathematical model was first developed for the recycling-based system by expanding input-output analysis. Utilizing this model, we clarified several significant implications on the possibility of the recycling-based system and the prices of recycled goods. Then various recycling technologies were evaluated to clarify how these technologies could contribute to establish the system as well as to mitigate global warming. Next we developed an optimization model of the entire industrial systems in Japan, including conventional and emerging technologies on waste disposal and recycling. Various institutions on the recycling system were investigated utilizing this model. These include prices of recycled goods and tradeoff relationships between promotion of recycling and reduction of CO2 emissions. In particular, evaluated results showed that shadow price of recycled goods did not necessarily become positive. We also proposed a novel institution on the recycling system as “Waste dumping permit” in Japan. In conclusion, we clarified a desirable strategy so as to establish the recycling-based system, as well as to mitigate global warming.