scholarly journals Thermal Switching: Instant Thermal Switching from Soft Hydrogel to Rigid Plastics Inspired by Thermophile Proteins (Adv. Mater. 4/2020)

2020 ◽  
Vol 32 (4) ◽  
pp. 2070032
Author(s):  
Takayuki Nonoyama ◽  
Yong Woo Lee ◽  
Kumi Ota ◽  
Keigo Fujioka ◽  
Wei Hong ◽  
...  
Keyword(s):  
Switching Instant ◽  
Thermal Switching

scholarly journals Wide range continuously tunable and fast thermal switching based on compressible graphene composite foams

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Tingting Du ◽  
Zixin Xiong ◽  
Luis Delgado ◽  
Weizhi Liao ◽  
Joseph Peoples ◽  
...  
Keyword(s):  
Thermal Management ◽  
Dynamic Control ◽  
Operating Conditions ◽  
Dynamic Thermal Management ◽  
Graphene Composite ◽  
Continuous Tuning ◽  
Composite Foams ◽  
Wide Range ◽  
Thermal Switches ◽  
Thermal Switching

AbstractThermal switches have gained intense interest recently for enabling dynamic thermal management of electronic devices and batteries that need to function at dramatically varied ambient or operating conditions. However, current approaches have limitations such as the lack of continuous tunability, low switching ratio, low speed, and not being scalable. Here, a continuously tunable, wide-range, and fast thermal switching approach is proposed and demonstrated using compressible graphene composite foams. Large (~8x) continuous tuning of the thermal resistance is achieved from the uncompressed to the fully compressed state. Environmental chamber experiments show that our variable thermal resistor can precisely stabilize the operating temperature of a heat generating device while the ambient temperature varies continuously by ~10 °C or the heat generation rate varies by a factor of 2.7. This thermal device is promising for dynamic control of operating temperatures in battery thermal management, space conditioning, vehicle thermal comfort, and thermal energy storage.

Thermal switching requirements for solid state magnetic refrigeration

2021 ◽  
pp. 167979
Author(s):  
D.J. Silva ◽  
A.M. Pereira ◽  
J.O. Ventura ◽  
J.P. Araújo ◽  
J.C.R.E. Oliveira
Keyword(s):  
Solid State ◽  
Magnetic Refrigeration ◽  
Thermal Switching

Ultrafast non-thermal and thermal switching in charge configuration memory devices based on 1T-TaS2

2021 ◽  
Vol 119 (1) ◽  
pp. 013106
Author(s):  
D. Mihailovic ◽  
D. Svetin ◽  
I. Vaskivskyi ◽  
R. Venturini ◽  
B. Lipovšek ◽  
...  
Keyword(s):  
Memory Devices ◽  
Thermal Switching ◽  
Charge Configuration

Bio-inspired thermal-responsive inverse opal films with dual structural colors based on liquid crystal elastomer

2015 ◽  
Vol 3 (17) ◽  
pp. 4424-4430 ◽  
Author(s):  
Huihui Xing ◽  
Jun Li ◽  
Jinbao Guo ◽  
Jie Wei
Keyword(s):  
Liquid Crystal ◽  
Inverse Opal ◽  
Liquid Crystal Elastomer ◽  
Structural Colors ◽  
Thermal Switching ◽  
Liquid Crystal Elastomers

The fabrication of inverse opal micropatterns based on liquid crystal elastomers with dual structural colors and their thermal switching behaviors are described.

Study on Periodic Thermal-Switching Behavior of Flat Heat Pipe

2015 ◽  
Author(s):  
Shigeki Hirasawa ◽  
Tatsuya Nakamu ◽  
Tsuyoshi Kawanami ◽  
Katsuaki Shirai
Keyword(s):  
Heat Transfer ◽  
Heat Source ◽  
Heat Pipe ◽  
Heat Transfer Performance ◽  
Switching Behavior ◽  
Transfer Performance ◽  
Unsteady Heat Transfer ◽  
Cold Energy ◽  
Thermal Switching ◽  
Flat Heat Pipe

The coupling of the electrocaloric effect in thin films with thermal switches has the potential to be used for efficient refrigeration. We studied the unsteady heat transfer performance and periodic thermal-switching behavior of a flat heat pipe to transfer cold energy from a changing heat source. The condenser of the flat heat pipe was the changing heat source and changed from −20 W to +20 W every 5 s. The temperature of the condenser surface changed in accordance with the heat generation of the heat source. The evaporator was a plate with a mesh wick attached to a water-flow pipe. Cold energy transferred from the condenser surface to the evaporator surface only when the temperature of the condenser surface was lower than that of the evaporator surface. We analyzed the unsteady temperature change and heat transfer performance of the flat heat pipe by numerical simulation. The analytical results showed that it was necessary to have two thermal switches to separate the heat energy and cold energy of the changing heat source. Also, it was important to reduce the thermal resistance and heat capacity of the evaporator surface to improve the unsteady heat transfer performance of the heat pipe. Next, we measured the unsteady heat transfer performance of the flat heat pipe experimentally. The experimental results showed that the thermal-switching behavior was observed when the heat generation of the heat source changed every 5 s.

Thermal Switching of Thermoresponsive Polymer Aqueous Solutions

2017 ◽  
Vol 7 (1) ◽  
pp. 53-58 ◽  
Author(s):  
Chen Li ◽  
Yunwei Ma ◽  
Zhiting Tian
Keyword(s):  
Aqueous Solutions ◽  
Thermoresponsive Polymer ◽  
Thermal Switching
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