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首页> 外文期刊>Solar Energy >Novel low-cost parabolic trough solar collector with TPCT heat pipe and solar tracker: Performance and comparing with commercial flat-plate and evacuated tube solar collectors
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Novel low-cost parabolic trough solar collector with TPCT heat pipe and solar tracker: Performance and comparing with commercial flat-plate and evacuated tube solar collectors

机译：具有TPCT热管和太阳能跟踪器的新型低成本抛物槽式太阳能集热器：性能及与商用平板和真空管太阳能集热器的比较

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摘要

This work presents a novel low-cost parabolic trough solar collector in which a two-phase closed thermosiphon (TPCT) heat pipe made of stainless steel and composed of evaporation and condensation parts with a total length of 285 cm has been utilized to capture solar heat. The evaporation part with the length of 240 cm positioned in the center of the collector's reflector has been coated with selective coating and is insulated from environment using twin wall evacuated glass tube. The condensation part with the length of 45 cm located inside a cylindrical manifold thermally insulated using glass wool transfers the vaporization latent heat of vapor existing inside the condensation part to heat transfer fluid (HIT) flowing inside the manifold, and heats it. CuO - H(2)Onanofluid prepared by mixing distilled water and copper oxide nonopowder with 1% weight concentration has been utilized as the working fluid of the TPCT heat pipe. The collector has been installed on a low-priced sensorless dual-axis solar tracker operating using offline data obtained from solar map equations. The tracker has been chosen as dual-axis to guarantee continuously keeping the reflector's aperture perpendicular to the sun ray. The proposed parabolic trough solar collector has been built, and comparative experimental measurements obtained from the operation of the built solar collector, a state-of-the-art evacuated tube solar collector (commercial high-efficient evacuated tube solar collector ETC-20) and a state-of-the-art flat-plate solar collector (commercial high-efficient flat-plate solar collector FPC-A26) under identical realistic conditions are given. Experimental measurements and comparison prove the following points which are the novelties and contributions of this research work:The novel parabolic trough solar collector presented in this study provides higher thermal efficiency compared to the state of the art of both evacuated tube solar collectors (ETC-20) and flat-plate solar collectors (FPC-A26) available in the market.It provides flatter thermal efficiency curve.It provides higher power production density (ratio of peak output power to aperture area).It has lower construction cost and a reasonable ratio of price to power production.
机译：这项工作提出了一种新颖的低成本抛物槽式太阳能集热器，其中利用由不锈钢制成的两相闭式热虹吸管（TPCT）热管，由总长度为285 cm的蒸发和冷凝部分组成，以捕获太阳能。位于收集器反射镜中央的长度为240厘米的蒸发部分已涂有选择性涂层，并使用双壁真空玻璃管与环境隔离。长度为45 cm的冷凝部分位于使用玻璃棉进行热绝缘的圆柱形歧管内部，将存在于冷凝部分内部的蒸汽的汽化潜热传递给在歧管内部流动的传热流体（HIT）并进行加热。通过将蒸馏水和重量百分比为1％的氧化铜非粉末混合制备的CuO-H（2）纳米流体已用作TPCT热管的工作流体。该收集器已安装在使用从太阳能图方程获得的离线数据的低价无传感器双轴太阳能跟踪器上。跟踪器已被选作双轴，以确保连续保持反射器的孔径垂直于阳光。已建立了拟议的抛物线槽式太阳能集热器，并从内置太阳能集热器，最先进的真空管式太阳能集热器（商业高效真空管式太阳能集热器ETC-20）的运行中获得了对比实验测量结果。给出了在现实条件相同的情况下的最新平板太阳能集热器（商业高效平板太阳能集热器FPC-A26）。实验测量和比较证明了以下几点是本研究工作的新颖性和贡献：与两个真空管太阳能集热器（ETC-20）相比，本研究中提出的新型抛物槽太阳能集热器具有更高的热效率。 ）和市场上出售的平板太阳能集热器（FPC-A26），热效率曲线更平坦，功率产生密度更高（峰值输出功率与孔径面积之比），具有较低的建造成本和合理的比率价格对电力生产的影响。

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