Design and finite volume evaluation of a counterflow recuperative spiral heat exchanger for additive manufacturing

Bush, Bastian; Caughley, Alan; Glasson, Neil; Badcock, Rodney A.; Weijers, Hubert; Lumsden, Grant; Gschwendtner, Michael; Jeong, Sangkwon; Singamneni, Sarat

doi:10.1016/j.cryogenics.2022.103548

Cited by 6 publications

(4 citation statements)

References 27 publications

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“…22 Therefore, the proposed system presented herein is also modeled with the same d/p ratio of 4:1 to achieve the maximum heat transfer. Busch et al 23 devised a counter flow recuperative spiral heat exchanger to achieve a large temperature difference between the inlets (i.e. )., 30 K for cold inlet and 300 K for the hot inlet to maintain the temperature of electric components efficiently at a constant level.…”

Section: Validationmentioning

confidence: 99%

Exhaust condensation through porous bed in the primary zone of novel dump diffuser geometry

Prawin

Rose

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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The work presented in this article deals with the reduction of air pollution generated by automobiles. It is accomplished through the process of condensation using novel techniques such as utilization of porous metal foams. A modified geometry dump diffuser is used to facilitate flow of exhaust gases slowly around copper coils thereby condensing them. The condensed gases can be collected and stored in a chamber and then can be carried to industries for recycling. This article involves design of the modified geometry dump diffuser using CATIA V5 tool. The computational fluid dynamics (CFD) analysis of the model is carried out using the ANSYS Fluent software. The inlet parameters are obtained as per the exhaust characteristics of a typical 0.8 l 3-cylinder Gasoline Engine. The results are presented for modified geometry dump diffuser models with and without porous bed. Porous bed module is used to simulate the presence of metal foams in the primary zone and inside the inner fluid zone. The results are presented. The results show that the modified geometry dump diffuser model with porous bed can cool the exhaust gases to their condensation temperature. This model can be employed in automobiles to reduce air pollution.

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Section: Validationmentioning

confidence: 99%

Exhaust condensation through porous bed in the primary zone of novel dump diffuser geometry

Prawin

Rose

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…The previous flow distribution, which mainly determines the boundary conditions for heat transfer, has been neglected (e.g. [3,4]). Investigations are typically conducted using large-volume distribution chambers, which often have unfavorable flow conditions but are not taken into account [5].…”

Section: Introductionmentioning

confidence: 99%

Enhancing fluid distribution in additively manufactured heat exchangers using autogenerated geometries

Kimmich

2024

J. Phys.: Conf. Ser.

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The heat exchanger distributor, which connects the tube carrying the medium to the heat transfer geometry, has received less attention in research studies compared to heat transfer geometries. However, the flow distribution is critical to efficiency. Therefore, a model-in-the-loop approach is presented to optimize additively manufactured distributors. A quasi-fractal distributor and all connected geometries, including pipe connections, heat transfer geometry and collector, are meshed and simulated in OpenFOAM using steady-state computational fluid dynamics. The volumetric flow rates determined from the simulation are assigned to the respective flow cross-sections during the distribution process. The flow cross-sections of the geometric model are modified within an optimization process, considering the prevailing volumetric flows. The results indicate a 64 % decrease in the standard deviation of volume flow across all 85 channels with a simple optimizer and few simulation loops. The printable geometry can be extracted directly out of Python using common file formats. The presented workflow has been proven feasible. Future improvements could involve using the automated model-in-the-loop simulation and creating optimizing algorithms considering fluid flow behavior.

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“…Liu, Z. T. et al introduced a composite heat exchanger combining a plate-fin heat exchanger and a front deflector, which effectively improves the heat conversion efficiency at high altitudes of an aircraft [16]. Bush, B. et al proposed a composite heat exchanger applied to aircraft, which includes a heat pump and a return heat exchanger, and it can realize smooth heat circulation at low temperatures [17]. Xu, Y. et al proposed a coupling of a vapor compression system and lubricating oil system to solve the problem of engine power loss due to heat supply on an aircraft and, to a certain extent, alleviate the engine power loss due to heat supply.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer and flow characterisation of aircraft heat exchangers considering manufacturing constraints

Lei,

Wan,

2024

Applied Mathematics and Nonlinear Sciences

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With the progress and development of the times, the traditional aircraft power system and difficult to meet the needs of the current aviation development, for the aircraft power and heat exchanger research has been more and more extensive attention. This study takes the heat exchanger of the aircraft loop control system as an example, constructs the thermal management system of the aircraft according to the mechanism of its heat transfer and flow characteristics, and optimizes it under the consideration of manufacturing constraints. Based on the theory of fluid mechanics, the aircraft heat exchanger is simulated, and control equations based on heat transfer and flow characteristics are established. In this paper, the temperature difference of the heat exchanger is increased by 6.5°C and 5.4°C, respectively, and the heat transfer coefficient is between 11 and 14 kW/m²k. Furthermore, the fluid temperature has risen from 0.05 to 0.5 to 0.30 to 0.87 with the increase in flow rate. The maximum deviation values were 8.3%, 6.7%, and 8.6%, respectively, and the confidence intervals were all above 90%. This study can effectively improve the efficiency of aircraft heat exchangers compared to traditional heat exchangers and has more advantages in heat transfer performance, which provides a reference value for the development of the aviation field.

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Design and finite volume evaluation of a counterflow recuperative spiral heat exchanger for additive manufacturing

Cited by 6 publications

References 27 publications

Exhaust condensation through porous bed in the primary zone of novel dump diffuser geometry

Exhaust condensation through porous bed in the primary zone of novel dump diffuser geometry

Enhancing fluid distribution in additively manufactured heat exchangers using autogenerated geometries

Heat transfer and flow characterisation of aircraft heat exchangers considering manufacturing constraints

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