The evolutionary design of cooling a plate with one stream

International Journal of Thermal Sciences

2019

Section: Introductionmentioning

confidence: 99%

Constructal design of flow channels for radiant cooling panels

Mosa

Labat

International Journal of Thermal Sciences

2019

“…This is particularly true when it comes to heat transfer and fluid flow. Examples can be found in the domain of the cooling of electronics [4][5][6], latent thermal storage [7,8], heat transfer and fluid [9], photovoltaic modules [10], etc.…”

Section: Symbolsmentioning

confidence: 99%

Role of flow architectures on the design of radiant cooling panels, a constructal approach

Mosa

Labat

Applied Thermal Engineering

2019

Here we document the performance of a radiant cooling panel made of flow channels sandwiched between a suspended metal plate and an insulation layer. The flow passages represent the crucial element of the panel. In the present work, the heat transfer and flow characteristics of the panel are investigated. A numerical study is conducted to explore the role played by the flow architectures on the overall performance of the panel in steady state, subjected to radiation and convection heat fluxes from the bottom. A comparison between serpentine and canopy-to-canopy (dendritic) flow channels is presented. In all the cases, the following geometrical constrains apply: fixed plate area and flow volume. From one configuration to the other, the flow is given more freedom to morph in accord with the Constructal approach. We demonstrated that the dendritic architecture allows a significant improvement in the cooling panel performance, with more cooling capacity and less pumping power. In addition, we showed that the morphing of the panel itself toward more compactness is also a way to increase the ratio of cooling capacity/pumping power.

“…At the same time, Almerbati, Lorente, and Bejan showed how a plate should be cooled with a single stream when the design is free to morph from a serpentine to a cloverleaf loop. The stream was assumed to be isothermal, and only heat transfer by conduction along the plate was considered.…”

Section: Heat Exchangersmentioning

confidence: 99%

Current trends in constructal law and evolutionary design

Bejan

2019

Heat Trans. Asian Res.

The constructal law was postulated in 1996 as the law of physics that accounts for the phenomenon of time evolution of configuration in all flow systems that have the freedom to morph: animate and inanimate, human made and not human made, social and individual. The constructal-law field has grown rapidly during the past two decades, particularly with applications to evolutionary design in technology, and with predictions of evolutionary design in biology, geophysics, and social organization. In this review, we highlight some of the current research trends in this field. The topics chosen are from the past 5 years from the activity in our own group, for example, energy storage, heat exchangers, porous media, and technology evolution. The review ends with future directions for research in this very active field.