Numerical Investigation of an Integrated Cross-Media Heat Exchanger (iCMHX) for Gas-to-Liquid Cooling Applications

Mandel, Raphael; Shooshtari, Amir; Ohadi, Michael M.

doi:10.1109/itherm45881.2020.9190398

Cited by 3 publications

(13 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This section validates the numerical study using experimental results for both waterside and air-side testing. The present numerical study is further compared with the authors' past numerical work [23,24].…”

Section: Resultsmentioning

confidence: 92%

“…A velocity inlet condition is imposed on the surfaces where the fluids enter their respective domains, while a pressure-outlet condition of zero Pa is imposed on surfaces where the fluids exit the domains. In order to ensure that the upstream and downstream boundary conditions do not affect the results, the inlet and outlet are kept at around 11Dh from the first and last wires, as is performed in the authors' past study [23]. A temperature This is performed by assuming uniform fluid flow and temperature profile across all water inlets.…”

Section: D Cfd Modelmentioning

confidence: 99%

“…For thermal performance, Nusselt numbers for both fluids are obtained using the Eff-NTU method as detailed in [23]. Typical velocity and temperature contour plots at some given flow rate for the air-side domain are shown in Figure 6.…”

Section: D Cfd Modelmentioning

confidence: 99%

“…Similarly, for hydrodynamic performance, Euler numbers are obtained for both the fluids based on the total number of wires simulated and v b . A detailed analysis can be found in [23].…”

Section: D Cfd Modelmentioning

confidence: 99%

“…The additively manufactured metal-polymer composite HX [23,24] comprises an HX core made of polymer and an array of metal wires, which act as fins for both air-side and liquid-side convective heat transfer, as shown in Figure 1. Metal wires can be arranged in a staggered or inline configuration.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Numerical and Experimental Study of a Novel Additively Manufactured Metal-Polymer Composite Heat-Exchanger for Liquid Cooling Electronics

Mandel¹,

Shooshtari²,

Ohadi³

2022

Energies

Self Cite

View full text Add to dashboard Cite

In order to meet increasing power-dissipation requirements of the electronics industry, compact, low-cost, and lightweight heat exchangers (HXs) are desired. With proper design, materials, and manufacture, polymer composite heat exchangers could meet these requirements. This paper presents a novel crossflow air-to-water, low-cost, and lightweight metal-polymer composite HX. This HX, which is entirely additively manufactured, utilizes a novel cross-media approach that provides direct heat exchange between air and liquid sides by using connecting fins. A robust numerical model was developed, which includes the dimensional effects of additive manufacturing. The study consists of a simplified 3D CFD model based on ellipsoidal-shaped staggered tube banks for the laminar range. It then uses an analytical approach to compute entire HX performance. The model is validated experimentally within 8% for thermal performance, 12% for air-side impedance, and 18% for water-side impedance. Finally, HX is compared with a conventional CPU radiator and performs within 10% of the conventional unit for reasonable flow rates and pressure-drop ranges. Moreover, HX also provides added design and cost advantages over the conventional unit, which makes the HX a potential candidate for electronic cooling applications.

show abstract

Section: Resultsmentioning

confidence: 92%

Section: D Cfd Modelmentioning

confidence: 99%

Section: D Cfd Modelmentioning

confidence: 99%

“…Similarly, for hydrodynamic performance, Euler numbers are obtained for both the fluids based on the total number of wires simulated and v b . A detailed analysis can be found in [23].…”

Section: D Cfd Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Numerical and Experimental Study of a Novel Additively Manufactured Metal-Polymer Composite Heat-Exchanger for Liquid Cooling Electronics

Mandel¹,

Shooshtari²,

Ohadi³

2022

Energies

Self Cite

View full text Add to dashboard Cite

show abstract

Performance Characterization of a Novel Low-Cost Additively Manufactured PCM-Air Polymer Composite Thermal Energy Storage

Ayyagari

Mandel

Shooshtari

et al. 2022

2022 21st IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (iTherm)

View full text Add to dashboard Cite

A 1D Reduced-Order Model (ROM) for a Novel Latent Thermal Energy Storage System

2022

Self Cite

View full text Add to dashboard Cite

Phase change material (PCM)-based thermal energy storage (TES) systems are widely used for repeated intermittent heating and cooling applications. However, such systems typically face some challenges due to the low thermal conductivity and expensive encapsulation process of PCMs. The present study overcomes these challenges by proposing a lightweight, low-cost, and low thermal resistance TES system that realizes a fluid-to-PCM additively manufactured metal-polymer composite heat exchanger (HX), based on our previously developed cross-media approach. A robust and simplified, analytical-based, 1D reduced-order model (ROM) was developed to compute the TES system performance, saving computational time compared to modeling the entire TES system using PCM-related transient CFD modeling. The TES model was reduced to a segment-level model comprising a single PCM-wire cylindrical domain based on the tube-bank geometry formed by the metal fin-wires. A detailed study on the geometric behavior of the cylindrical domain and the effect of overlapped areas, where the overlapped areas represent a deviation from 1D assumption on the TES performance, was conducted. An optimum geometric range of wire-spacings and size was identified. The 1D ROM assumes 1D radial conduction inside the PCM and analytically computes latent energy stored in the single PCM-wire cylindrical domain using thermal resistance and energy conservation principles. The latent energy is then time-integrated for the entire TES, making the 1D ROM computationally efficient. The 1D ROM neglects sensible thermal capacity and is thus applicable for the low Stefan number applications in the present study. The performance parameters of the 1D ROM were then validated with a 2D axisymmetric model, typically used in the literature, using commercially available CFD tools. For validation, a parametric study of a wide range of non-dimensionalized parameters, depending on applications ranging from pulsed-power cooling to peak-load shifting for building cooling application, is included in this paper. The 1D ROM appears to correlate well with the 2D axisymmetric model to within 10%, except at some extreme ranges of a few of the non-dimensional parameters, which lead to the condition of axial conduction inside the PCM, deviating from the 1D ROM.

show abstract

Numerical Investigation of an Integrated Cross-Media Heat Exchanger (iCMHX) for Gas-to-Liquid Cooling Applications

Cited by 3 publications

References 22 publications

Numerical and Experimental Study of a Novel Additively Manufactured Metal-Polymer Composite Heat-Exchanger for Liquid Cooling Electronics

Numerical and Experimental Study of a Novel Additively Manufactured Metal-Polymer Composite Heat-Exchanger for Liquid Cooling Electronics

Performance Characterization of a Novel Low-Cost Additively Manufactured PCM-Air Polymer Composite Thermal Energy Storage

A 1D Reduced-Order Model (ROM) for a Novel Latent Thermal Energy Storage System

Contact Info

Product

Resources

About