抛物槽式集热器双轴跟踪方式性能研究

摘要/Abstract

摘要： 针对抛物槽式集热器双轴跟踪方式进行了性能影响分析与几何受限条件下不同跟踪方式对比，开发了基于 Matlab的抛物槽式集热器逐时集热量模拟程序并对程序进行了验证。研究结果表明：随着海拔的升高，单位面积全年累积接收太阳辐射总量先上升后缓慢下降，随着纬度的升高，单位面积接收太阳辐射量在一年内中分布不均匀性增强；在几何受限条件下，对于单轴跟踪，当边长比大于1时，南北布置相比东西布置全年累积接收太阳辐射总量Q更高，而边长比小于1时，东西布置比南北布置单轴的Q更高；随着单轴跟踪排数的增加，Q逐渐增加且一般高于双轴跟踪；在选定地理条件下，全年减排量与Q成正比；双轴跟踪方式下年平均单位接收太阳辐射量所需费用最低，南北方向布置比东西方向布置所需费用更低。

关键词: 太阳能, 抛物槽式集热器, 太阳辐射总量, 双轴跟踪, 地理因素, 几何受限

Abstract: The performance affecting factors of two-axis tracking method taking by parabolic trough collectors were analyzed，and various tracking methods under different geometrically constrained conditions were compared. A time-intime heat collection simulation program for parabolic trough collectors was developed based on Matlab and validated. According to the analysis results，the solar radiation per unit area received annually shows an increase trend followed by a slight decline as the altitude rises，and its uneven distribution is more prominent as the latitude increases. Under geometrically constrained conditions，when the ratio of side length is greater than 1，the solar radiation per unit area received annually（Q）of a one-axis tracking device displayed in north-south direction is higher than that of the device displayed in east-west direction.As the row number of one-axis tracking devices increases，the Q gradually increases and is generally higher than that of two-axis tracking devices. Under the selected geographic conditions，the annual emission reduction is proportional to Q，and the cost of solar radiation per unit area received annually by two-axis tracking method is the lowest among various methods，and the cost of the devices displayed in north-south direction is lower than that displayed in east-west direction.

张智，孙杰，祁昊均. 抛物槽式集热器双轴跟踪方式性能研究[J]. 华电技术, 2020, 42(5): 1-7.

ZHANG Zhi，SUN Jie*，QI Haojun. Performance study on two-axis tracking method of parabolic trough collectors[J]. Huadian Technology, 2020, 42(5): 1-7.

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抛物槽式集热器双轴跟踪方式性能研究

Performance study on two-axis tracking method of parabolic trough collectors

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