Flux Measurement of a New Beam-down Solar Concentrating System in Miyazaki for Demonstration of Thermochemical Water Splitting Reactors
Flux Measurement of a New Beam-down Solar Concentrating System in Miyazaki for Demonstration of Thermochemical Water Splitting Reactors
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DOI：
10.1016/j.egypro.2014.03.211
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
T. Kodama;N. Gokon;K. Matsubara;K. Yoshida;S. Koikari;Yoshinori Nagase;K. Nakamura
中科院分区：
文献类型：
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作者：
T. Kodama;N. Gokon;K. Matsubara;K. Yoshida;S. Koikari;Yoshinori Nagase;K. Nakamura
利用非化学计量比氧化铈的两步热化学水分解循环是一种很有前途的太阳能热化学制氢工艺。其中一位作者开发了一种新的太阳能反应堆，它使用带有氧化铈颗粒的“内循环流态化床”来进行高温循环。这些太阳能反应堆需要与光束向下的太阳能聚光系统相结合。新泻大学、宫崎大学和Mitaka Kohki株式会社最近启动了一个研发联合项目，以演示使用太阳能的大规模沸腾床反应堆。2012年8月，在宫崎市大学校园内建成了一套新型的100kW聚光太阳能系统。本文描述了用于热化学水分离反应堆演示的新的宫崎县束流下降系统的第一批太阳通量测量结果。通过移动13个加登量规阵列，测量了聚焦点处的集中太阳辐射通量。2012年10月12日中午左右，日间辐射3小时，焦点130×130厘米范围内的太阳能功率大于90千瓦，超过110千瓦。专门针对这种新的光束下降系统的新的CPC被设计和制造，以将太阳通量集中到太阳反应堆孔径的44厘米直径圆内。从2013年10月开始，这些反应堆的太阳能演示将从宫崎市的束下系统开始。
A two-step thermochemical water splitting cycle using nonstoichiometric cerium oxide is a promising solar thermochemical hydrogen production process. One of the present authors has developed new solar reactors using “internally circulating fluidized beds” with cerium oxide particles for the high-temperature cycle. These solar reactors need to be combined with a beam-down solar concentrating system. Niigata University, University of Miyazaki, and Mitaka Kohki Co. Ltd. recently started an R&D joint project to demonstrate the up-scaled fluidized bed reactors with solar. A new type of 100 kWthbeam-down solar concentrating system was built in August, 2012 at the campus of University of Miyazaki. This paper describes the first results of solar flux measurements on the new Miyazaki beam-down system for demonstration of thermochemical water splitting reactors. The fluxes of concentrated solar radiation at the focus point were measured by moving an array of thirteen Gardon gauges. The solar power in an area of 130 × 130 cm in the focal spot was larger than 90 kWthduring three hours of daytime radiation, exceeding 110 kWtharound noon on October 12, 2012. A new CPC specific to this new beam-down system was designed and fabricated to concentrate the solar fluxes into a 44 cm diameter circle of the solar reactor aperture. The solar demonstration of the reactors will start at the Miyazaki beam-down system from October 2013.