Heat transfer enhancement through nano-fluids and twisted tape insert with rectangular cut on its rib in a double pipe heat exchanger

Gnanavel, C.; Saravanan, R.; Chandrasekaran, M.

doi:10.1016/j.matpr.2019.07.606

Cited by 31 publications

(14 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Arulprakasajothi et al [31] conducted experiments in the transitional flow regime with conical inserts of different twist ratios fitted inside a cylindrical tube and found that conical strip with a twist ratio of 2 introduced more swirls when compared with other twist ratio inserts. Gnanavel et al [32] investigated the thermal performance of a double pipe heat exchanger fitted with rectangular cut twisted tape inserts with different nanofluid flowing through it and reported an enhancement in the thermal performance of the heat exchanger with an increase in the flow velocity. In another numerical investigation by Gnanavel et al [33], a similar kind of study was done with circular fin inserts.…”

Section: Introductionmentioning

confidence: 99%

Heat and Fluid Flow Analysis and ANN-Based Prediction of A Novel Spring Corrugated Tape

et al. 2021

View full text Add to dashboard Cite

A circular tube fitted with novel corrugated spring tape inserts has been investigated. Air was used as the working fluid. A thorough literature review has been done and this geometry has not been studied previously, neither experimentally nor theoretically. A novel experimental investigation of this enhanced geometry can, therefore, be treated as a new substantial contribution in the open literature. Three different spring ratio and depth ratio has been used in this study. Increase in thermal energy transport coefficient is noticed with increase in depth ratio. Corrugated spring tape shows promising results towards heat transfer enhancement. This geometry performs significantly better (60% to 75% increase in heat duty at constant pumping power and 20% to 31% reduction in pumping power at constant heat duty) than simple spring tape. This paper also presented a statistical analysis of the heat transfer and fluid flow by developing an artificial neural network (ANN)-based machine learning (ML) model. The model is evaluated to have an accuracy of 98.00% on unknown test data. These models will help the researchers working in heat transfer enhancement-based experiments to understand and predict the output. As a result, the time and cost of the experiments will reduce. The results of this investigation can be used in designing heat exchangers.

show abstract

Section: Introductionmentioning

confidence: 99%

Heat and Fluid Flow Analysis and ANN-Based Prediction of A Novel Spring Corrugated Tape

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The results showed that the Nu of the twisted tube combined with the twisted tapes were greater than the normal tube by about 33-168%. Gnanavel et al (2019) investigated a twisted tape where the rectangular cut was applied in a double pipe heat exchanger. The simulation was conducted under laminar and turbulent flow conditions (Re = 1000 -10000).…”

Section: Introductionmentioning

confidence: 99%

Thermal performance investigation of a plate fin heat sink equipped with twisted tape and perforated twisted tape

Nilpueng

2021

JTST

View full text Add to dashboard Cite

Thermal performance investigation of a plate fin heat sink equipped with twisted tape and perforated twisted tape Abstract The concept of heat transfer enhancement in a plate fin heat sink (PFHS) using twisted tape is presented. The airflow behavior in the flow channel and heat sink performance are investigated at the Reynolds numbers between 2000 and 5000. The twisted tape and perforated twisted tape with twist ratio between 2.5 and 3.5 are equipped between the fins of the PFHS. For perforated twisted tape, the holes are drilled along the twisted tape length with the ratio of perforation diameter to twisted taped width (d/W) between 0.2 and 0.6. The heat transfer coefficient and pressure drop are enhanced by decreasing the twist ratio and increasing the Reynolds number and the d/W ratio between 0.2 and 0.4. However, they are dropped when the d/W ratio higher than 0.4. The highest thermal performance factors of the plate fin heat sink equipped with twisted tape (PFHSTT) and the plate fin heat sink equipped with perforated twisted tape (PFHSPTT) are 1.28 and 1.33, respectively. The correlations of the Nusselt number and friction factor related to twist ratio and d/W ratio are generated and proposed for designing and selecting in the future.

show abstract

“…TiO2 with water and glycol is used, and simulations are done for incompressible turbulent flow. Gnanavel et al [15] simulated laminar and turbulent nanoflow with different nanofluids numerically. Nanofluid heat transfer characteristics were obtained and compared with each other and the best one was determined.…”

Section: Introductionmentioning

confidence: 99%

A Characteristic-based Numerical Simulation of Water-titanium Dioxide Nano-fluid in Closed Domains

Adibi

Razavi

Adibi

2020

IJE

View full text Add to dashboard Cite

Heat transfer enhancement through nano-fluids and twisted tape insert with rectangular cut on its rib in a double pipe heat exchanger

Cited by 31 publications

References 10 publications

Heat and Fluid Flow Analysis and ANN-Based Prediction of A Novel Spring Corrugated Tape

Heat and Fluid Flow Analysis and ANN-Based Prediction of A Novel Spring Corrugated Tape

Thermal performance investigation of a plate fin heat sink equipped with twisted tape and perforated twisted tape

A Characteristic-based Numerical Simulation of Water-titanium Dioxide Nano-fluid in Closed Domains

Contact Info

Product

Resources

About