研究了抛物面盘集热器直径和深度对太阳塔式集热器聚光比和温度量的影响

Sattar Al-Jabair, L. Habeeb, A. Ali
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摘要

本文介绍了三种不同尺寸的抛物面碟形集热器模型,通过不同的集热器,研究了碟形集热器直径和深度的变化对聚焦点位置和浓缩比以及出口热水或蒸汽温度的影响。本文研究了一种利用太阳能产生热水和蒸汽的新系统,该系统由盘子和接收器组成。由不同尺寸的铁制成的抛物面式太阳能集热器,第一个模型直径(82厘米)和深度(6厘米),这使得聚焦长度(70厘米)和集中比(25.6)。第二个模型具有直径(100cm)和深度(3cm),这给出焦距(208cm)和浓度比(15)。第三个型号的直径(150cm)和深度(12cm),这给出了聚焦长度(100cm)和集中比(399),正面覆盖镍金属板,将太阳辐射聚焦在所有型号的接收器上。与第三种型号一起使用的三种不同形状的接收罐;即案例一,使用矩形接收水箱(100×50×5) cm3装满25升水。案例二使用螺旋铜盘管(12.5 mm× 3m),装在铝制圆柱容器(0.2 m ×0.6 m)内。案例三使用散热器热交换器接收水箱(37×47×4) cm3,装满3l的水。使用低成本和可用的材料制造实验部件。这个盘子,作为太阳反射器的一部分,被几条镍金属板覆盖。抛物面盘式集热器运行时,矩形接收水箱内水温为60℃,铜圈内水温为75℃,散热器装置接收器内水温为125℃。对于矩形接收罐,在时间(2h)内获得热水;对于铜盘管接收罐,在时间(30min)内获得热水;对于散热器换热器接收罐,在时间(20min)内获得蒸汽。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study the Effect of Diameter and Depth of Parabolic Dish Collector on the Concentration Ratio and Temperature Amount of Solar Tower Receiver
This work introduces three models of parabolic dish collectors with different dimension to study the effect of change diameter and depth of the dish on the position of focus point and concentration ratio and the temperature of outlet hot water or steam by using different receivers. The present work deals with a new system consists of dish and receiver to produce hot water and steam from solar energy. The parabolic dish solar collector fabricated from iron with different dimension the first model with diameter (82 cm) and depth (6 cm), this gives focus length (70cm) and Concentration ratio (25.6). The second model with a diameter (100cm) and depth (3 cm), this give focus length (208cm) and concentration ratio (15). The third model with a diameter  (150cm) and depth (12cm), This give focus length (100cm) and concentration ratio (399) and the front side covered by nickel sheet metal to focus the solar radiation upon the receiver for all models  . Three different shapes of receiver tanks used with the third model ; namely case one which used rectangular receiver tank (100×50×5) cm3 filled with 25 liter of water. Case two used helical copper coil (12.5 mm× 3 m) inside aluminum cylindrical vessel (0.2 m ×0.6 m). Case three used radiator heat exchanger receiver tank (37×47×4) cm3 filled with 3 liter of water. Use low cost and available materials to manufacture the experimental part. The dish, used as part of the solar reflector, covered by several strips of nickel sheet metal. When the parabolic dish collector was operational, the temperature of water was 60 oC in rectangular receiver tank, 75 0C within the copper coil and 125 oC in radiator device receiver. For rectangular receiver tank, hot water obtained within time (2 h), for copper coil receiver tank, hot water obtained within time (30 min) and for radiator heat exchanger receiver, steam obtained within time (20 min).
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