New correlations for predicting convective heat transfer of single and multi-row heat exchangers employing staggered drop-shaped tubes

Deeb, Rawad

doi:10.1016/j.ijheatmasstransfer.2022.123689

Cited by 12 publications

(4 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The minimum spacing between channels is then fixed at 3r. Unlike other cross-flow systems where the hot and cool flows are separated by a thin barrier [13,14,15], we make the approximation that due to the distance between pores, h H A and h C A will both be much greater than Sk so that conductivity through the block will be the rate limiting step in the transfer process and therefore…”

Section: Heat Transfer Modelmentioning

confidence: 99%

Description and analytical modeling for a solid block cross-flow high temperature heat exchanger

Barlow

Bayat

Hancock

2023

Preprint

View full text Add to dashboard Cite

In this report, we present the design specifics, and performance modeling results, for a simple, solid metal block, liquid-liquid cross-flow heat exhanger intended for high temperature applications. The design consists of a solid block of metal, with cylindrical channels providing the cross‐flow passageways for two non-mixing liquids. In this design, all flow channels are separated by a certain minimum thickness of the host solid block material. This particular design is limited by the length of pores that can be machined from a solid block. In this study we present and apply a simple heat transfer model for such an exchanger and use it to estimate what values of effectiveness might be obtainable while keeping the size of the exchanger as compact as possible. The effects of pore radius, liquid specific heat and viscosity and block material conductivity on exchanger effectiveness are considered and results reported. The model predicts that for a cubic exchanger of side length 8.25 cm with 50 channels per side at a diameter of 3.0 mm each, for a particular high temperature situation using molten salts, with an inlet and outlet temperature difference of around 170 K, an effectiveness of 0.4 can be achieved with a total mass flow rate of 0.5 kg/s along with a Reynolds number of less than 2000.

show abstract

Section: Heat Transfer Modelmentioning

confidence: 99%

Description and analytical modeling for a solid block cross-flow high temperature heat exchanger

Barlow

Bayat

Hancock

2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Tube alignment inside the heat exchanger is very important because it directly determines the performance [18][19][20][21][22]. Generally, a staggered alignment enhances heat transfer; thus, most crossflow heat exchangers adopt staggered tubes.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Performance Tests of a Circular-Fin Sodium-to-Air Heat Exchanger for Sodium-Cooled Fast Reactors

Lee,

Kim,

Eoh

et al. 2024

International Journal of Energy Research

View full text Add to dashboard Cite

Shell and tube-type crossflow heat exchangers with circular fins are widely used in various industries, including nuclear power plants. This study focuses on the sodium-to-air heat exchanger, which is one of the key safety features in sodium-cooled fast reactors. Tube alignment inside the heat exchanger is important because it directly determines the performance. Although heat exchangers are generally designed to have staggered tube alignment, inevitable inline-aligned zones exist. Therefore, this paper proposes a hybrid tube alignment modeling approach that considers both staggered and inline tube heat transfer phenomena. The results of the hybrid model calculations are verified and validated with liquid sodium experiments. The hybrid approach to the tube arrangement reduced the temperature deviation between experimental and calculated values to a difference of 4.55% and 7.38% for both sodium and air sides, respectively, while for the heat transfer, the difference was 15.12% and 9.06% for sodium and air sides, respectively. The results of this study can also be used as a basis for the safety evaluation of nuclear reactors and licensing processes for sodium-cooled fast reactors. In addition, this study is limited not only to sodium heat exchangers but also to any serpentine tube arrangement or crossflow heat exchanger under high-temperature systems, such as concentrated solar power and thermal energy storage industries.

show abstract

“…How well is ANSYS Fluent able to simulate the fluid flow and heat transfer characteristics of the selected heat exchanger configuration? What impact do different coolant flow rates have on the spiral-wound heat exchanger that Deeb (2023) The solid wall and, later, the cold fluid on the other side of the heat exchanger both get thermal energy as the hot fluid moves through it. The variance in temperature between the two liquids, the heat exchanger's heat transfer factor, and the measurements of the surface used for heat transfer all impact how quickly heat is transferred.…”

Section: Introductionmentioning

confidence: 99%

“…A numerical analysis of this heat exchanger is provided in the paper. The study examined heat transfer and flow in the heat exchanger properties under various operating situations using CFD models, and it also evaluated the pressure drop and thermal performance [8]. Mehdi et al (2023) researched the design and performance evaluation of a plate heat exchanger with rectangular channels included in the study.…”

Section: Introductionmentioning

confidence: 99%

Study the heat exchanger through ANSYS Fluent

Sufian,

Muhammad Javaid Afzal,

Javaid

et al. 2023

Proceedings of International Exchange and Innovation Conference on Engineering &Amp; Sciences (IEICES)

View full text Add to dashboard Cite

A heat exchanger is a tool used to move heat from one fluid to another without letting the fluids mix. The fluids can be liquids or gases, flowing in separate channels or passages separated by a solid wall. In order to get the cold fluid to the desired temperature, the heat exchanger converts thermal energy from the hot fluid to the cold fluid. They are commonly used in a number of businesses and industries to recover waste heat, cool or heat process fluids, and maintain or adjust temperatures. ANSYS Fluent software was used to model and simulate the heat exchanger in this investigation. The simulation results of the heat exchanger of velocity at the inlet and temperature at the outlet are 3.43 m/s and 3.4×10 2 K, respectively. The study aimed to understand better the heat exchanger's fluid flow and heat transfer properties to design it for better performance. A wide range of working situations was simulated, including various inlet velocities, outlet pressures, and temperatures. Experimental data were used to validate the simulation model, and the findings revealed good agreement between the two. For better findings, copper material was employed in the simulation in this study rather than aluminium in the work of other researchers. Copper is a better heat conductor than aluminium because it has a higher thermal conductivity. Because of this, it is a strong option for applications where heat transfer must happen swiftly and effectively. Copper is a superior material for applications that will be exposed to aggressive environments since it is more corrosion-resistant than aluminium. The simulation results were examined to determine how different factors affected the heat exchanger's output, including its heat transmission and fluid flow capabilities. The simulation was then used to improve the heat exchanger's design for improved performance.

show abstract

New correlations for predicting convective heat transfer of single and multi-row heat exchangers employing staggered drop-shaped tubes

Cited by 12 publications

References 28 publications

Description and analytical modeling for a solid block cross-flow high temperature heat exchanger

Description and analytical modeling for a solid block cross-flow high temperature heat exchanger

Heat Transfer Performance Tests of a Circular-Fin Sodium-to-Air Heat Exchanger for Sodium-Cooled Fast Reactors

Study the heat exchanger through ANSYS Fluent

Contact Info

Product

Resources

About