A Review on Heat Transfer Augmentation in Parabolic Trough Collector Receiver Tube by Twisted Tape Inserts
Author(s):
Trivedi Divyesh Rajnikant , Marwadi Education Foundation and Group of Institutes; Karan H. Motwani, Marwadi Education Foundation and Group of InstitutesKeywords:
Enter Parabolic Trough Collector, Heat Transfer Fluid, Twisted Tape, Twist Ratio, Width RatioAbstract:
In Parabolic Trough Collectors (PTCs) the major heat losses occur due to convection and radiation because of many reasons. One of them is non-evacuated receiver used in earlier PTC delivered lower thermal efficiency even they are used with reflectors having best optical characteristics. PTC with evacuated receivers has thermal-efficiency in the range of 65–70% which is about 10% higher than PTC with non-evacuated receiver. Therefore heat transfer augmentation in PTC became essential to transfer maximum heat to heat transfer fluid (HTF). Heat transfer augmentation techniques are of two types: Active techniques and Passive techniques. The present study is focused on review and feasibility of passive heat transfer augmentation technique, especially twisted tape inserts inside PTC receiver. It can be seen that, for PTC application use of twisted tape insert with base fluid is beneficial in the laminar region and nanofluid with twist tape insert is justified for turbulent regime. The base fluids with twisted tape insert augmented heat transfer by 10–200% in turbulent region compared to its flow in plane receiver. The heat transfer augmentation by twisted tape inserts is due to increased effective heat transfer area, swirl generation and increase in flow turbulence with interruption to the growth of boundary layer.
Other Details:
| Manuscript Id | : | J4RV3I2038 |
| Published in | : | Volume : 3, Issue : 2 |
| Publication Date | : | 01/05/2017 |
| Page(s) | : | 63-68 |
