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首页> 外文期刊>International journal of green energy >A Parametric Study on the Thermal Performance of Unglazed Solar Water Collectors with Their Colorbond Steel Absorber Plates Also Used as Roofs
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A Parametric Study on the Thermal Performance of Unglazed Solar Water Collectors with Their Colorbond Steel Absorber Plates Also Used as Roofs

机译：无釉太阳能集热器及其彩色粘结钢吸水板也用作屋顶的热性能的参数研究

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摘要

In this paper, an innovative unglazed solar water collector with its colorbond steel absorber plate also serving as the roof is proposed. Two most common colorbond steel profiles used as roofs, namely the Lysaght BlueOrb colorbond steel with the cosine profile and the Spandek colorbond steel with a trapezoidal shaped profile, are selected as the absorber plates. A theoretical energy balance model is developed to conduct a detailed parametric study on the thermal performance of this innovative unglazed solar collector with both colorbond steel absorber plate profiles under various configuration and operating conditions. The results show that both types of collectors can achieve high thermal efficiency (similar to 70%) and can increase the water temperature by about 8 degrees C, indicating they are suitable for the domestic utilization in at least tropical and similar regions as well; The two types of collectors produce very close thermal performances; improved thermal performance can be achieved through optimizing a number of parameters such as using a selective coating for the absorber plate to enhance its optical properties, using slender collector configurations, and using a compromized mass flow rate to maintain a high efficiency and to attain the higher temperature outputs.
机译：在本文中，提出了一种创新的无釉太阳能集水器，其彩色粘结的钢吸收板也可以用作屋顶。选择两种最常见的用作屋顶的色粘结钢型材，即具有余弦轮廓的Lysaght BlueOrb色粘结钢和具有梯形形状的Spandek色粘结钢作为吸收板。开发了理论能量平衡模型，以对这种创新的无釉面太阳能集热器进行热力学性能的详细参数研究，该集热器具有两种颜色的钢吸收板形状，并且在各种配置和操作条件下均如此。结果表明，两种类型的集热器均可以达到较高的热效率（约70％），并且可以使水温提高约8摄氏度，这表明它们也至少在热带和类似地区也适合家庭使用；两种类型的集热器产生非常接近的热性能。可以通过优化许多参数来实现改善的热性能，例如使用吸收板的选择性涂层以增强其光学性能，使用细长的集热器配置以及使用折衷的质量流量来保持高效率并获得更高的效率。温度输出。

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