Experimental study on the air-side thermal-flow performance of additively manufactured heat exchangers with novel fin designs

Unger, Sebastian; Beyer, Matthias; Gruber, Samira; Willner, Robin; Hampel, Uwe

doi:10.1016/j.ijthermalsci.2019.106074

Cited by 32 publications

(8 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(11), 𝑞̇ is equal to the overall thermal conductance per unit volume of the heat exchanger. This parameter is similar to that defined by Shah and Sekulić [38] and Unger et al [15]. Figure 11 shows a comparison of the 𝑞̇ values of the porous lattice and the fin-tube heat exchangers over the range of 𝑚̇ tested.…”

Section: Comparison With Conventional Heat Exchangerssupporting

confidence: 68%

See 1 more Smart Citation

Additively-manufactured metallic porous lattice heat exchangers for air-side heat transfer enhancement

Leong

Wong

2020

International Journal of Heat and Mass Transfer

View full text Add to dashboard Cite

Section: Comparison With Conventional Heat Exchangerssupporting

confidence: 68%

“…They demonstrated the use of this AM-fabricated heat exchanger for high temperature conditions. On the other hand, Unger et al [15] experimentally investigated the thermal-hydraulic performances of two new annular fin designs fabricated by SLM. The designs consist of pin fins integrated in circular (CIPF) and serrated (SIPF) annular fins.…”

Section: Introductionmentioning

confidence: 99%

Additively-manufactured metallic porous lattice heat exchangers for air-side heat transfer enhancement

Leong

Wong

2020

International Journal of Heat and Mass Transfer

View full text Add to dashboard Cite

“…As a benchmark the conventional circular plain fin design (CPF) was used and compared to 2 novel fin designs, which are the circular integrated pin fin (CIPF) and the serrated integrated pin fin (SIPF) design. We investigated these heat exchanger designs for single tube heat exchanger in previous studies [25,26]. The tube bundle heat exchangers consist out of several finned tubes, which are shown in Fig.…”

Section: Experimental Apparatusmentioning

confidence: 99%

“…The thermocouple readings were used to calculate the average outer tube wall temperature. From our previous studies we found a homogenous temperature distribution along the tube axis using the applied experimental method [26,28]. The installed thermocouples were guided to the heat exchangers by small feedthroughs at the chimney wall, which were tightened before each experiment.…”

Section: Experimental Apparatusmentioning

confidence: 99%

Natural convection heat transfer performance of additively manufactured tube bundle heat exchangers with novel fin design

et al. 2021

Self Cite

View full text Add to dashboard Cite

We studied the heat transfer of finned heat exchanger configurations with a novel design. These novel fin designs use integrated pins to enhance the heat conduction from the fin base to the fin tip as well as the air-side heat transfer on the fin surface. Oval tubes with conventional circular plain fins (CPF) as well as novel circular integrated pin fins (CIPF) and serrated integrated pin fins (SIPF) were additively generated by a Selective Laser Melting (SLM) process and installed at the bottom of a 6.5 m long chimney. All heat exchanger designs were tested in a 2-row and 3-row configuration with Rayleigh numbers between 25,000 and 120,000. We found the average Nusselt number of SIPF to be higher and the Nusselt number of the CIPF to be lower than for the CPF. Moreover, the 2-row configuration achieved a higher Nusselt number compared to the 3-row configuration for all heat exchanger designs. The analysis of the individual tube rows showed the highest Nusselt numbers at the first tube row and the lowest one at the last tube row for both configurations. However, for the SIPF the difference between the first and second tube row is smaller compared to the CPF and CIPF. In order to evaluate the compactness of the heat exchanger, the volumetric heat flux density was considered. Similar to Nusselt number the volumetric heat flux density enhanced for the SIPF and reduced for the CIPF compared to the conventional design. Also the 2-row configuration reached greater thermal performance compared to the 3-row configuration. Additionally, the volume and the surface area of the heat exchanger are 6.9% and 30.7% lower for the SIPF compared to the CPF. The experimental data were used to develop an empirical heat transfer correlation between Nusselt number, Rayleigh number, fin design and tube row number.

show abstract

“…Additionally, the temperature profile increases against the Brinkman number, pressure gradient, Joule heating, wall's temperature, viscosity while reverse behavior is observed via electro-kinetic and magnetic field parameters, heat transportation generation/absorption and radiative heat flux in homogeneous-heterogeneous catalytic reactions of non-Newtonian fluid is studied by [11], radiative flow by convective cylinder is studied in [12], comparative study of nano-particles in viscous fluid flow is reported in [13] and Ijaz Khan et al reported study of reactive aspect in flow of tangent hyperbolic material [14]. For conduction phenomena, in [15] Unger et al introduce a novel fin tube exchanger for the improvement of conductive heat transfer in the tube fins. At the same time, convection occurs along its surface.…”

Section: Introductionmentioning

confidence: 99%

A Quantitative Study of Non-Linear Convective Heat Transfer Model by Novel Hybrid Heuristic Driven Neural Soft Computing

et al. 2022

View full text Add to dashboard Cite

Heat transfer has a vital role in material selection, machinery efficacy, and energy consumption. The notion of heat transfer is essential in understanding many phenomena related to several engineering fields. Particularly, Mechanical, civil and chemical engineering. The presentation of the heat transfer model in this manuscript is a dedication to the heat transfer characteristics such as conduction, convection, and radiation. The heat energy consumption mainly depends on these characteristics. A better conductive and convective paradigm is required for miniaturization of heat loss or transfer. The phenomenon is mathematically assumed with the required parameters. A new mathematical strategy is also designed and implemented in the manuscript to evaluate the dynamics of heat transfer model. The mathematical approach is the hybrid structure of the Sine-Cosine algorithm and Interior point algorithm. The validation of new technique is evaluated by mean absolute deviation, root mean square errors, and error in Nash-Sutcliffe efficiency. For better illustration, an extensive data set executed by the proposed mathematical strategy is also drawn graphically with convergence plots.

show abstract

Experimental study on the air-side thermal-flow performance of additively manufactured heat exchangers with novel fin designs

Cited by 32 publications

References 28 publications

Additively-manufactured metallic porous lattice heat exchangers for air-side heat transfer enhancement

Additively-manufactured metallic porous lattice heat exchangers for air-side heat transfer enhancement

Natural convection heat transfer performance of additively manufactured tube bundle heat exchangers with novel fin design

A Quantitative Study of Non-Linear Convective Heat Transfer Model by Novel Hybrid Heuristic Driven Neural Soft Computing

Contact Info

Product

Resources

About