An additively manufactured metallic manifold-microchannel heat exchanger for high temperature applications

Zhang, Xiang; Tiwari, Ratnesh; Ohadi, Michael M.

doi:10.1016/j.applthermaleng.2018.08.032

Cited by 91 publications

(17 citation statements)

References 12 publications

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“…This 3D printed manifold-microchannel pre-cooler was tested at 600°C and an inlet pressure of 448 kPa. The test results demonstrated an overall heat transfer coefficient up to 1000 W/m 2 K for gas-to-gas application, and a heat transfer density of ~10 kW/kg, which is 25% higher than typical PFHXs (Zhang et al, 2018). Moreover, a larger 10cm x 10cm x 10cm M2HX has also been successfully fabricated as shown in Fig.…”

Section: Pre-cooler For Aircraft Environmental Control System Applicamentioning

confidence: 76%

“…In those works, 50% or higher heat transfer was reported for the same pressure drop when compared to state-of-the-art fins such as wavy fins, louver fins, and plain plate fins. A recent work at the Advanced Heat Exchangers and Process Intensification laboratory at University of Maryland (Zhang et al, 2018) shows that a manifoldmicrochannel heat exchanger fabricated using Inconel 718 can achieve 25% less weight for the same heat transfer and pressure drop performance compared to several commercially available PFHXs for pre-cooling applications at 600°C for aircraft applications, as shown in Fig. 9.…”

Section: Manifold-microchannel Heat Exchangermentioning

confidence: 99%

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Recent Developments in High Temperature Heat Exchangers: A Review

Ohadi¹,

Zhang²,

Keramati³

et al. 2018

Frontiers in Heat and Mass Transfer

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Heat exchangers are key components of most power conversion systems, a few industrial sectors can particularly benefit from high temperature heat exchangers. Examples include conventional aerospace applications, advanced nuclear power generation systems, and high efficiency stationary and mobile modular fossil fuel to shaft power/electricity conversion systems. This paper provides a review of high temperature heat exchangers in terms of build materials, general design, manufacturing techniques, and operating parameters for the selected applications. Challenges associated with conventional and advanced fabrication technologies of high temperature heat exchangers are discussed. Finally, the paper outlines future research needs of high temperature heat exchangers.

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Section: Pre-cooler For Aircraft Environmental Control System Applicamentioning

confidence: 76%

Section: Manifold-microchannel Heat Exchangermentioning

confidence: 99%

Recent Developments in High Temperature Heat Exchangers: A Review

Ohadi¹,

Zhang²,

Keramati³

et al. 2018

Frontiers in Heat and Mass Transfer

Self Cite

View full text Add to dashboard Cite

show abstract

“…Additive manufacturing enables adjustments of a wide range of geometrical parameters at once in order to yield better flow distribution in the system [30]. However, the benefits of additive technology lie not only in the relative freedom of geometrical complexity [31,32] but also in the ease of passive enhancement of heat transfer.…”

Section: Introductionmentioning

confidence: 99%

Experimentally Verified Flow Distribution Model for a Composite Modelling System

Fialová

Jegla

2021

Energies

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Requirements of modern process and power technologies for compact and highly efficient equipment for transferring large heat fluxes lead to designing these apparatuses as dense parallel flow systems, ranging from conventional to minichannel dimensions according to the specific industrial application. To avoid operating issues in such complex equipment, it is vital to identify not only the local distribution of heat flux in individual parts of the heat transfer surface but also the uniformity of fluid flow distribution inside individual parallel channels of the flow system. A composite modelling system is currently being developed for accurate design of such complex heat transfer equipment. The modeling approach requires a flow distribution model enabling to yield accurate-enough predictions in reasonable time frames. The paper presents the results of complex experimental and modeling investigation of fluid flow distribution in dividing headers of tubular-type equipment. Different modeling approaches were examined on a set of header geometries. Predictions obtained via analytical and numerical models were validated using data from the experiments conducted on additively manufactured header samples. Two case studies employing parallel flow systems (mini-scale systems and a conventional-size heat exchanger) demonstrated the applicability of the distribution model and the accuracy of the composite modelling system.

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“…Xia et al [22] analyzed the heat exchanger network synthesis problem based on entransy theory. Zhang et al [23] demonstrated the successful fabrication of a gas-togas manifold-microchannel heat exchanger through DMLS (direct metal laser sintering) using Inconel 718. They experimentally tested the heat exchanger with N2 on the hotside at 600 °C and air on the cold-side at 38 °C.…”

Section: Introductionmentioning

confidence: 99%

Study of Heat and Mass Transfer Through an Earth to Air Heat Exchanger Equipped with Fan in South West of Algeria

Sakhri¹,

Menni²,

Chamkha³

et al. 2019

IJHT

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Earth to air heat exchanger is a very old technique used 3000 years B.C in arid regions where that was called Qanat. In the present experimental study, the potentials of earth to air heat exchanger to provide thermal comfort for winter weather conditions in South west of Algeria described as arid region are investigated. An EAHE made of 66 meter of PVC tube and buried at 1.5 meter underground in agriculture zone equipped with 33 W fan was studied. Thermal and hygrometric analysis of air passing inside the tube form inlet to outlet was conducted. The results show the system was able to create two thermal regimes: heating regime with a gain of 13 °C (from 00h to 11h and from 17h to 23h) and cooling regime (from 12h to 16h) with 6 °C in the same day. Relative humidity was reduced by 32 % of 90 % of studied cases which stops the development of microorganism and reducing Internal Air Quality.

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An additively manufactured metallic manifold-microchannel heat exchanger for high temperature applications

Cited by 91 publications

References 12 publications

Recent Developments in High Temperature Heat Exchangers: A Review

Recent Developments in High Temperature Heat Exchangers: A Review

Experimentally Verified Flow Distribution Model for a Composite Modelling System

Study of Heat and Mass Transfer Through an Earth to Air Heat Exchanger Equipped with Fan in South West of Algeria

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