High-temperature Fluidized Receiver for Concentrated Solar Radiation by a Beam-down Reflector System☆
High-temperature Fluidized Receiver for Concentrated Solar Radiation by a Beam-down Reflector System☆
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DOI：
10.1016/j.egypro.2014.03.048
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
K. Matsubara;Y. Kazuma;A. Sakurai;S. Suzuki;L. Soon-Jae;T. Kodama;N. Gokon;C. H. Seok;K. Yoshida
中科院分区：
文献类型：
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作者：
K. Matsubara;Y. Kazuma;A. Sakurai;S. Suzuki;L. Soon-Jae;T. Kodama;N. Gokon;C. H. Seok;K. Yoshida
这项研究提出了一种新型的流化接收器，用于吸收在高温下聚集的太阳光。以前，开发了管状接收器和容积式接收器来为太阳能燃气涡轮机系统制造高温空气。其目的是将这些元件与塔反射器联合收割机结合起来;然而，将这些重型接收器安装在塔顶具有挑战性。目前，流化接收器原型是由一个3千瓦时的太阳能模拟器进行测试，准备在宫崎光束向下反射系统的现场测试。对原型接收器的流体动力学进行了数值研究。目前处理的接收器是一个内循环流化床喷射的同心气流与高和低的速度在中心和外环，分别。导流管浸没在颗粒中以组织颗粒循环。集中的光通过接收容器顶部的石英窗口照射颗粒。这种流化床首先由Kodama等人采用，用于热化学反应;然而，目前正在追求其作为高温接收器的潜力，旨在集中太阳能发电。原型接收器（内径= 45 mm）的实验表明，内部颗粒被加热到大于900 °C的温度，并且中心气体速度的增加去除了颗粒床表面附近的过高温度。数值计算表明，大尺度的颗粒循环导致热混合的激活。因此，目前提出的接收器预期衰减可能发生在常规体积多孔接收器中的再辐射损失。接收器的放大正在考虑的数值计算的现场测试中的宫崎100千瓦时波束向下反射系统。
This study proposes a novel fluidized receiver for absorbing concentrated solar light at high temperatures. Previously, a tubular receiver and a volumetric receiver were developed to make high-temperature air for a solar gas turbine system. The aim was to combine these elements with a tower reflector; however, it was challenging to install these heavy receivers on the top of the tower. Currently, a fluidized receiver prototype is tested by a 3 kWh solar simulator in preparation for a field test at the Miyazaki beam-down reflector system. The fluid dynamics of the prototype receiver is numerically investigated. The currently treated receiver is an inner-circulating fluidized bed spouted by concentric gas streams with high and low velocities in the center and outer annulus, respectively. The draft tube is submerged in the particles to organize particle circulation. Concentrated light irradiates the particles through a quartz window at the top of the receiver container. Such a fluidized bed was first adopted by Kodama et al. for thermochemical reactions; however, it is currently pursued for its potential as a high-temperature receiver aimed at concentrated solar power generation. Experiments of the prototype receiver (inner diameter = 45 mm) demonstrated that the inner particles are heated to a temperature greater than 900 °C and that an increase of the central gas velocity removes the excess temperature near the particle bed surface. A numerical computation suggests that the large-scale circulation of particles leads to the activation of thermal mixing. The currently proposed receiver is thus expected to attenuate re-radiation losses likely to occur in a conventional volumetric porous receiver. The scale-up of the receiver is being considered by the numerical computation for a field test in the Miyazaki 100 kWh beam-down reflector system.