Testing of Solar Thermal Collectors Under Transient Conditions
Testing of Solar Thermal Collectors Under Transient Conditions
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DOI：
10.1016/j.egypro.2012.11.148
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发表时间：
2014-06
期刊：
影响因子：
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通讯作者：
T. Osório;M. J. Carvalho
中科院分区：
文献类型：
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作者：
T. Osório;M. J. Carvalho
欧洲最重要的集热器测试标准是EN 12975：2006，该标准适用于所有主要实验室，是Solar Keymark认证的参考。除了稳态方法外，EN 12975还允许在具有可变辐射和环境温度的自然条件下在室外进行准动态方法的应用。通过分析自2008年以来在里斯本太阳能实验室（LES）获得的气象数据系列，研究了每次试验的可用天数，显示了准动态试验的优势。对五种不同类型的捕收剂进行了稳态和准动态模拟。结果进行了比较，并观察到一个很好的协议之间的稳态和准动态的测试结果。详细分析了入射角修正器和集热器有效热容量的问题，从而确定了模型和试验的局限性。提出了拟动力试验方法和数据分析的改进建议。
The most important standard for collector testing in Europe is the EN 12975:2006 which is applied in all the major laboratories and is the reference for the Solar Keymark certification. Besides the steady-state method, the EN 12975 allows the application of the quasi-dynamic method performed outdoors in natural conditions with variable radiation and ambient temperature. The available number of days for each test was investigated by analyzing meteorological data series acquired in the Solar Energy Laboratory (LES) in Lisbon since 2008 showing the advantage of the quasi- dynamic test. Both the steady-state and the quasi-dynamic methods were applied to five collectors of different types. The results were compared and a good agreement between the steady-state and the quasi-dynamic test results was observed. Issues concerning the incidence angle modifiers and the effective thermal capacity of the collectors were analyzed in detail, which resulted in the identification of model and test limitations. Suggestions are given to improve the test methodology and the data analysis of quasi-dynamic test.