A parabolic trough collector (PTC) is one of the concentrating types of a solar collector working in the medium range of temperature from 100–400 °C, for this reason, the efficiency of the solar parabolic trough is less than other types of concentrating solar collector (Point focusing types) in terms of solar to thermal energy conversion, the improvement in efficiency is achieved by various passive heat augmentation techniques in the receiver tube. One of the promising passive techniques is twisted tape inserts used in the receiver due to its simplicity in design and the various possibility of geometric modification. This paper deals with the performance evaluation of the solar parabolic trough receiver system by using passive techniques in the receiver. The testing of the receiver of PTC was done by using multiple perforated twisted tapes with winglets having different perforation ratios ($d_p/w$) of 0.05, 0.15, 0.25, twist ratios ($y/w$) of 3, 4, 5 and wing depth ratios ($d/w$) of 0.1, 0.2 and 0.3. The number of twisted tapes was fixed at 4. The examination was conducted for Reynolds numbers ($Re$) varying from 3000–21,000 using air as working fluid. The outcome shows that the use of perforation and winglet in twisted tapes augment the Nusselt number as compared to that of smooth twisted tapes. The maximum thermohydraulic performance (${\eta }_{TH(MPTTW)}$) of 2.40 is received by using multiple twisted tapes with perforation and winglet having $d/w$ = 0.3, $y/w$ = 3, and $d_p/w$ = 0.05 at the Re = 21,000. The correlations for Nusselt number ($N{u}_{MPTTW}$) and friction factor ($f{f}_{MPTTW}$) are also developed with ± 8.5% and ± 8.3% accuracy, respectively.

抛物槽式集热器 (PTC) 是太阳能集热器的一种聚光类型，工作在 100-400°C 的中等温度范围内，因此，太阳能抛物线槽的效率低于其他类型的聚光太阳能集热器（点聚焦型）在太阳能到热能的转换方面，效率的提高是通过接收管中的各种被动热增强技术实现的。一种很有前途的无源技术是在接收器中使用的扭曲带插入物，因为它设计简单，并且几何形状修改的各种可能性。本文通过在接收器中使用无源技术来评估太阳能抛物面槽式接收器系统的性能。$d_p/瓦$) 的 0.05, 0.15, 0.25, 扭曲比 ($是/瓦$) 的 3, 4, 5 和翼深比 ($d/瓦$) 的 0.1、0.2 和 0.3。双绞带的数量固定为4。进行雷诺数的检查（$\mathrm{电阻}\mathrm{电子}$) 从 3000 到 21,000 不等，使用空气作为工作流体。结果表明，与光滑扭曲带相比，在扭曲带中使用穿孔和小翼增加了努塞尔数。最大热工水力性能（${\eta }_{吨H(米磷吨吨宽)}$) 的 2.40 是通过使用具有穿孔和小翼的多条绞合带获得的 $d/瓦$ = 0.3, $是/瓦$ = 3，并且 $d_p/瓦$ = 0.05 在 Re = 21,000。Nusselt 数的相关性 ($N{你}_{米磷吨吨宽}$) 和摩擦系数 ($F{F}_{米磷吨吨宽}$) 的精度也分别为 ± 8.5% 和 ± 8.3%。