Influence of twisted tape inserts on energy and exergy performance of an evacuated Tube-based solar air collector

被引：18
作者：
Kumar, A. Veera [1 ]
Arjunan, T. V. [2 ]
Seenivasan, D. [1 ]
Venkatramanan, R. [1 ]
Vijayan, S. [3 ]
Matheswaran, M. M. [4 ]
机构：
[1] Coimbatore Inst Engn & Technol, Dept Mech Engn, Coimbatore 641109, Tamil Nadu, India
[2] Guru Ghasidas Vishwavidyalaya Cent Univ, Sch Studies Engn & Technol, Dept Mech Engn, Bilaspur 495009, Chattisgarh, India
[3] Natl Inst Technol, Dept Mech Engn, Tiruchirappalli 620015, India
[4] Jansons Inst Technol, Dept Mech Engn, Coimbatore 641659, Tamil Nadu, India
来源：
SOLAR ENERGY | 2021年 / 225卷
关键词：
Baffles; Twisted tape; Evacuated tube air collector; Twist ratio; Thermal Performance; Hole diameter ratio; HEAT-EXCHANGER TUBE; THERMAL PERFORMANCE; THERMOHYDRAULIC PERFORMANCE; CIRCULAR TUBE; AUGMENTATION;
D O I：
10.1016/j.solener.2021.07.074
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Energy and exergy behaviour of an Evacuated Tube with Inserted Baffles Solar Air Collector (ETIBSAC) with various design configurations of twisted tape is analyzed through an analytical model. Among those configurations, Loose-Fit Perforated Twisted Tape (LFPTT) exhibits better performance in terms of energy effectiveness. Hence, LFPTT was selected for further investigation to identify the influence of helical twist ratio (y/D) and tape hole diameter ratio (d/D). The analytical model predicts the energy and exergy performance of the ETIBSAC with LFPTT inserts (y/D) = 2, 2.5 and 3 & (d/D) = 0.0714, 0.107 and 0.143. The results show that ETIBSAC with LFPTT produces the highest effective thermal and exergy efficiencies at lower airflow rates. The peak thermal efficiency of 62.33% was attained at 400 kg/h with (y/D) = 2 & (d/D) = 0.0714. The exergy efficiency attained its peak value of 3.91% and reduces with increasing airflow rate due to more exergy destruction. It is concluded that the proposed insertion of twisted tapes can be adopted for enhancing the performance of the system.
引用
收藏
页码：892 / 904
页数：13
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