Effects of serrated circular ring with rectangular winglets on thermal properties of tube heat exchanger: an experimental and numerical study

Singh, Satyendra; Pandey, Ashutosh; Kharkwal, Himanshi

doi:10.1080/08916152.2019.1702599

Cited by 5 publications

(3 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The findings indicated that when compared to a plain tube, the greatest improvements in heat transfer rate, Nusselt number, and coefficient of convection heat transfer were approximately 26.6, 106.1, and 91.7%. Singh et al [44] experimentally and computationally explored the effect of serrated circular rings with rectangular winglets (SCRWRW) on the thermal performance of a circular-tube heat exchanger. Diameter ratios (DR) of 0.8 and 0.85, pitch ratios (PR) of 3 and 4, attack angles of 15 • , 30 • , and 45 • , and the blockage ratio of 0.05 were the geometrical parameters taken into account.…”

Section: Experimental Studies On Ring and Twisted Tapesmentioning

confidence: 99%

Impact of Nano Additives in Heat Exchangers with Twisted Tapes and Rings to Increase Efficiency: A Review

Assaf,

Akroot,

Abdul Wahhab

et al. 2023

Sustainability

View full text Add to dashboard Cite

The heat exchanger is crucial to all systems and applications that use it. Researchers are primarily focused on improving this component’s thermal conductivity to improve its efficiency. This was achieved by using one or more of the following strategies: inserting tapes with various shapes and numbers, inserting rings of various shapes and spacing between each, and transforming a basic liquid into a nanoliquid by adding nanomaterials with high conductivity and ultra-small particle sizes. Different types of nanomaterials were added in varying concentrations. In earlier studies, it was found that every increase in heat transfer was accompanied by a pressure drop at both ends of the exchanger. The amount of heat transferred and the pressure drop are affected by many factors, such as the torsion tape ratio, the pitch of the ring, and whether the pitch faces the direction of flow or not. Heat transfer rates can also be impacted by factors such as the length and angle of the wings, how many rings and tapes there are, and whether the rings and tapes contain holes or wings. In addition, the Reynolds number, the type, conductivity, and size of nanomaterials, and the base fluid used in the nanofluid affect this. It is possible for the shape of the exchanger tube, as well as varying rates of rise, to introduce such impacts. In this study, the factors, costs, and benefits of using any technology to increase the efficiency of the heat exchanger are reviewed so that the user can make an informed decision about the technology to use.

show abstract

Section: Experimental Studies On Ring and Twisted Tapesmentioning

confidence: 99%

Impact of Nano Additives in Heat Exchangers with Twisted Tapes and Rings to Increase Efficiency: A Review

Assaf,

Akroot,

Abdul Wahhab

et al. 2023

Sustainability

View full text Add to dashboard Cite

show abstract

“…The device helps in energy conservation by improving the thermal exchange rate as well as by utilizing available energy in a better way. Twisted and Spring Tapes [24,[32][33][34][35][36], Wire coils [26,[37][38][39][40], longitudinal vortex generators [41][42][43][44], circular and conical ring inserts [45][46][47][48][49][50], obstruction of different geometries [51][52][53][54], etc. are some examples of swirl generators.…”

Section: Introductionmentioning

confidence: 99%

Turbulent Flow Heat Transfer through a Circular Tube with Novel Hybrid Grooved Tape Inserts: Thermohydraulic Analysis and Prediction by Applying Machine Learning Model

et al. 2021

View full text Add to dashboard Cite

The present experimental work is performed to investigate the convection heat transfer (HT), pressure drop (PD), irreversibility, exergy efficiency and thermal performance for turbulent flow inside a uniformly heated circular channel fitted with novel geometry of hybrid tape. Air is taken as the working fluid and the Reynolds number is varied from 10,000 to 80,000. Hybrid tape is made up of a combination of grooved spring tape and wavy tape. The results obtained with the novel hybrid tape show significantly better performance over individual tapes. A correlation has been developed for predicting the friction factor (f) and Nusselt number (Nu) with novel hybrid tape. The results of this investigation can be used in designing heat exchangers. 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 trained based on the features of experimental data, which provide an estimation of experimental output based on user-defined input parameters. 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.

show abstract

“…They studied the effect on thermal performance of heat exchanger by varying the spacing between inserts. In their further investigation, serrated circular rings with rectangular winglets were used and geometrical parameters like, attack angle, spacing and blockage ratio were studied [19].…”

Section: Introductionmentioning

confidence: 99%

CFD analysis for thermo-hydraulic properties in a tubular heat exchanger using curved circular rings

Singh

Kharkwal

Gautam

et al. 2020

J Therm Anal Calorim

Self Cite

View full text Add to dashboard Cite

The never-ending demands of humans have led researchers to find more efficient energy conversion technologies. Enhancing heat transfer rate in a tubular heat exchanger through curved circular rings is one type of passive method that is studied in this work. The computational analysis has been done using "FLUENT" module of ANSYS 16.0. The tubular heat exchanger has internal diameter of 68.1 mm, length of 1.5 m and constant heat flux of 1000 W m −2. Air is the working fluid, which flows in Re varying from 3000 to 21,000. After reaching steady state conditions, the Nusselt number and friction factor are calculated for CCR rings. Furthermore, perforation has been done on these rings with perforation index 8, 12 and 16% and thermo-hydraulic properties are investigated. Computational results show that perforating the rings have a significant effect on heat transfer and friction factor. Greater the perforation index, greater is the Nu and TPF. The maximum enhancements obtained in Nu and TPF are 7.4 and 1.56 times, respectively (as compared to that of smooth tube), for PCCR-16%.

show abstract

Effects of serrated circular ring with rectangular winglets on thermal properties of tube heat exchanger: an experimental and numerical study

Cited by 5 publications

References 38 publications

Impact of Nano Additives in Heat Exchangers with Twisted Tapes and Rings to Increase Efficiency: A Review

Impact of Nano Additives in Heat Exchangers with Twisted Tapes and Rings to Increase Efficiency: A Review

Turbulent Flow Heat Transfer through a Circular Tube with Novel Hybrid Grooved Tape Inserts: Thermohydraulic Analysis and Prediction by Applying Machine Learning Model

CFD analysis for thermo-hydraulic properties in a tubular heat exchanger using curved circular rings

Contact Info

Product

Resources

About