Recent Developments in High Temperature Heat Exchangers: A Review

Ohadi, Michael M.; Zhang, Xiang; Keramati, Hadi; Arie, Martinus; Singer, Farah; Tiwari, Ratnesh; Shooshtari, Amir

doi:10.5098/hmt.11.18

Cited by 12 publications

(6 citation statements)

References 55 publications

(82 reference statements)

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“…66 And decreases in yield strength with increasing temperature translates to greater container mass-and thus cost. Recent work [67][68][69][70] has made progress in producing flow equipment and heat exchangers out of ceramic, cermet, and other applicable materials. If high-temperature convection by molten salts and liquid metals is to become widespread, more research is needed into acceptable pairs of working fluids and container materials and cost-effectively manufacturing those materials into pipes, valves, heat exchangers, and other relevant components.…”

Section: Solar Thermalmentioning

confidence: 99%

To decarbonize industry, we must decarbonize heat

Thiel

Stark

2021

Joule

141

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Industry is often termed ''hard to decarbonize'' because a vast, inhomogeneous array of processes comprise the sector. But developing new, decarbonized process heating technologies represents a single, broadly applicable pathway to eliminating a large portion of sectoral emissions-and approximately one-fifth of global CO 2 emissions, overall. We begin this perspective with a brief review of the demand for and cost of industrial heat. Then, we highlight key challenges and R&D needs in developing zero-carbon industrial heating technologies. Technologies in four pathways are discussed:(1) zero-carbon fuels, (2) zero-carbon heat sources, (3) electrification of heat, and (4) better heat management. Finally, we identify crosscutting challenges to the development and adoption of zero-carbon industrial heat technologies, the solution to any of which would constitute a significant breakthrough on the path to industrial decarbonization.

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Section: Solar Thermalmentioning

confidence: 99%

To decarbonize industry, we must decarbonize heat

Thiel

Stark

2021

Joule

141

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“…Chen discussed the promise of polymer heat exchangers [103], and Soleimani reviewed recent developments in thermoelectric materials for room-temperature applications [104]. Lastly, Ohadi has outlined the challenges and future research needs in high-temperature heat exchangers [105]. These studies underscore the diverse and promising advancements in TEGs and heat exchangers.…”

Section: Introductionmentioning

confidence: 99%

Advancements in Thermoelectric Generator Design: Exploring Heat Exchanger Efficiency and Material Properties

Chen,

Du,

Chung

et al. 2024

Energies

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This paper presents a comprehensive study on the application and optimization of automotive thermoelectric generators (ATEGs), focusing on the crucial role of heat exchangers in enhancing energy conversion efficiency. Recognizing the substantial waste of thermal energy in internal combustion engines, our research delves into the potential of TEGs to convert engine waste heat into electrical energy, thereby improving fuel efficiency and reducing environmental impact. We meticulously analyze various heat exchanger designs, assessing their influence on the TEG’s output power under different exhaust gas flow rates and temperatures. Furthermore, we explore the impact of TEG material properties on the overall energy conversion effectiveness. Our findings reveal that specific heat exchanger designs significantly enhance the efficiency of waste gas heat exchange, leading to an improved performance of the TEG system. We also highlight the importance of thermal insulation in maximizing TEG output. This study not only contributes to the ongoing efforts to develop more sustainable and efficient vehicles but also provides valuable insights into the practical application of thermoelectric technology in automotive engineering. Through this research, we aim to pave the way for more environmentally friendly transportation solutions, aligning with global efforts to reduce fossil fuel dependence and mitigate environmental pollution.

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“…Most of these works highlight the performance advantages of additively manufactured HXs, such as a printing resolution capability, the material used, and the different shapes that AM can fabricate. A more detailed study in the literature on the benefits of AM in thermal management devices (not only HXs) can be found in [21][22][23]. Out of the additively manufactured designs reported in Table 1, the manifold-microchannel heat exchanger (M2HX) showed the most promising results, as it could increase the heat transfer coefficient without a significant increase in pressure drop.…”

Section: Introductionmentioning

confidence: 99%

Experimental Characterization of an Additively Manufactured Inconel 718 Heat Exchanger for High-Temperature Applications

et al. 2023

Self Cite

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This work presents the experimental results of a novel, air-to-air, additively manufactured manifold-microchannel heat exchanger with straight fins on both sides. The heat exchanger was made of Inconel 718 using a direct metal laser sintering technique. The overall core size of the heat exchanger was 94 mm × 87.6 mm × 94.4 mm, with a fin thickness of 0.220 mm on both the hot and cold sides. The heat exchanger was tested with pressurized nitrogen gas at 300 °C and 340 kPa for the hot side, while air at an ambient condition was used for the cold side. An overall heat transfer of 276 W/m2K was obtained for Reynolds number values of 132 and 79 for the cold and hot sides, respectively. A gravimetric heat transfer density (Q/m∆T) of 4.7–6.7 W/kgK and a volumetric heat transfer density (Q/V∆T) of 6.9–9.8 kW/m3K were recorded for this heat exchanger with a coefficient of performance value that varied from 42 to 52 over the operating conditions studied here. The experimental pressure drop results were within 10% of the numerical values, while the corresponding heat transfer results were within 17% of the numerical results, mainly due to imperfections in the fabrication process. Despite this penalty, the performance of the tested heat exchanger was superior to the conventional plate-fin heat exchangers: more than 60% of improvements in both gravimetric and volumetric heat transfer densities were recorded for the entire range of experimental data.

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Recent Developments in High Temperature Heat Exchangers: A Review

Cited by 12 publications

References 55 publications

To decarbonize industry, we must decarbonize heat

To decarbonize industry, we must decarbonize heat

Advancements in Thermoelectric Generator Design: Exploring Heat Exchanger Efficiency and Material Properties

Experimental Characterization of an Additively Manufactured Inconel 718 Heat Exchanger for High-Temperature Applications

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