Theoretical and experimental analysis of a horizontal planar Liquid-Vapour Thermal Diode (PLVTD)

Pugsley, Adrian; Zacharopoulos, Aggelos; Mondol, Jayanta Deb; Smyth, Mervyn

doi:10.1016/j.ijheatmasstransfer.2019.118660

Cited by 37 publications

(31 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Heat pipes are used as thermal diodes in various applications. For instance, Smyth et al., [ 162–164 ] Pugsley et al., [ 165 ] and Muhumuza et al. [ 166,167 ] tested water‐based thermal diodes for solar‐powered thermal storage, and Varga et al.…”

Section: Fluidic Thermal Control Devicesmentioning

confidence: 99%

“…Unfortunately, commercial heat pipes cannot be used in all applications; therefore, researchers are developing custom heat pipes. However, these suffer from problems with evaporation and leakage, [ 183,184 ] low performance, [ 165 ] and shifting of operating pressures/temperatures. [ 161 ] The main disadvantages of heat pipes are their limited optimal operation temperature range and, in some cases, the dependency of the thermal performance on the gravity direction.…”

Section: Fluidic Thermal Control Devicesmentioning

confidence: 99%

See 1 more Smart Citation

Fluidic and Mechanical Thermal Control Devices

Klinar

Swoboda

Rojo

et al. 2020

Adv Elect Materials

View full text Add to dashboard Cite

In recent years, intensive studies on thermal control devices have been conducted for the thermal management of electronics and computers as well as for applications in energy conversion, chemistry, sensors, buildings, and outer space. Conventional cooling or heating techniques realized using traditional thermal resistors and capacitors cannot meet the thermal requirements of advanced systems. Therefore, new thermal control devices are being investigated to satisfy these requirements. These devices include thermal diodes, thermal switches, thermal regulators, and thermal transistors, all of which manage heat in a manner analogous to how electronic devices and circuits control electricity. To design or apply these novel devices as well as thermal control principles, this paper presents a systematic and comprehensive review of the state‐of‐the‐art of fluidic and mechanical thermal control devices that have already been implemented in various applications for different size scales and temperature ranges. Operation principles, working parameters, and limitations are discussed and the most important features for a particular device are identified.

show abstract

Section: Fluidic Thermal Control Devicesmentioning

confidence: 99%

Section: Fluidic Thermal Control Devicesmentioning

confidence: 99%

Fluidic and Mechanical Thermal Control Devices

Klinar

Swoboda

Rojo

et al. 2020

Adv Elect Materials

View full text Add to dashboard Cite

show abstract

“…The highers rectification ratio they obtained is 1.43, taking ∆T = 50 K and filling half of the chamber with water. Soon after, Pugsley et al [219] realized a similar structure called horizontal planar liquid-vapor thermal diode. The planar here is flatter than the previous axial chamber, so the vapor from the hotter bottom in the forward mode can arrive and condensate at the upper side (a colder plate), and thus transfer more heat.…”

Section: Convectionmentioning

confidence: 99%

Designing nonlinear thermal devices and metamaterials under the Fourier law: A route to nonlinear thermotics

Dai

2021

Front. Phys.

View full text Add to dashboard Cite

Nonlinear heat transfer can be exploited to reveal novel transport phenomena and thus enhance people's ability to manipulate heat flux at will. However, there hasn't been a mature discipline called nonlinear thermotics like its counterpart in optics or acoustics to make a systematic summary of relevant researches. In the current review, we focus on recent progress in an important part of nonlinear heat transfer, i.e., tailoring nonlinear thermal devices and metamaterials under the Fourier's law, especially with temperature-dependent thermal conductivities. We will present the basic designing techniques including solving the equation directly and the transformation theory. Tuning nonlinearity coming from multi-physical effects, and how to calculate effective properties of nonlinear conductive composites using the effective medium theory are also included. Based on these theories, researchers have successfully designed various functional materials and devices such as the thermal diodes, thermal transistors, thermal memory elements, energy-free thermostats, and intelligent thermal materials, and some of them have also been realized in experiments. Further, these phenomenological works can provide a feasible route for the development of nonlinear thermotics.

show abstract

“…Thermosyphons are vertically oriented hollow containers partially filled with liquid. [ 15,17–19,25 ] In the forward mode of operation, steam ascends by buoyant convection and condenses at the top of the container. The condensate then slides back to the bottom reservoir by gravity, enabling continuous phase‐change heat transfer.…”

Section: Introductionmentioning

confidence: 99%

Bridging‐Droplet Thermal Diodes

Edalatpour

Murphy

Mukherjee

et al. 2020

Adv Funct Materials

View full text Add to dashboard Cite

Phase-change thermal diodes effectively transport heat unidirectionally, but are currently constrained by either a gravitational dependence, a 1D configuration, or poor durability. Here, a novel bridging-droplet thermal diode which uniquely bypasses all of these existing constraints is developed. The diode is comprised of two opposing copper plates separated by an insulating gasket of micrometric thickness; one plate contains a superhydrophilic wick structure while the other is smooth and hydrophobic. In the forward mode of operation, water evaporates from the heated wicked plate and condenses on the hydrophobic plate. The large contact angle of the dropwise condensate enables bridging across the gap to replenish the wicked evaporator, providing sustained phase-change heat transfer. Conversely, in the reverse mode, the heat source is now on the hydrophobic plate, resulting in dryout and excellent thermal insulation across the gap. An orientation-independent heat transfer ratio (i.e., diodicity) as high as 85 was measured.

show abstract

Theoretical and experimental analysis of a horizontal planar Liquid-Vapour Thermal Diode (PLVTD)

Abstract: Highlights • Horizontal planar unidirectional heat transfer device was realised (0.15m 2 PLVTD) • Applications in solar collectors and climate control building envelopes • One-dimensional lumped parameter heat transfer model developed & interrogated • Forward mode heat transfer 150

Cited by 37 publications

References 35 publications

Fluidic and Mechanical Thermal Control Devices

Fluidic and Mechanical Thermal Control Devices

Designing nonlinear thermal devices and metamaterials under the Fourier law: A route to nonlinear thermotics

Bridging‐Droplet Thermal Diodes

Contact Info

Product

Resources

About