Flow and thermal analysis of the transition scheme between micro-channel and micro-jet cooling solution

Guo, Yuming; Fan, Liang‐Liang; Zhao, Liang

doi:10.1016/j.applthermaleng.2023.120222

Cited by 8 publications

(1 citation statement)

References 36 publications

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“…In order to focus on the thermal performance of the TSC, a high value of convective heat-transfer coefficient (h ∞ = 10 000 W m −2 K −1 ) was chosen to obtain a nearly constant temperature on the heat sink side. Such high values of the convective heat-transfer coefficient h ∞ can be obtained with an microchannel liquid cooling [56,57] or a heat-pipe system [58]. Figure 6 shows that the temperature span decreases linearly with increasing cooling-power density from 1 W m −2 to 1000 W m −2 .…”

Section: Numerical Simulationsmentioning

confidence: 93%

A conceptual design of a thermal switch capacitor in a magnetocaloric device: experimental characterization of properties and simulations of operating characteristics

2023

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The quest for better performance from magnetocaloric devices has led to the development of thermal control devices, such as thermal switches, thermal diodes, and thermal capacitors. These devices are capable of controlling the intensity and direction of the heat flowing between the magnetocaloric material and the heat source or heat sink, and therefore have the potential to simultaneously improve the power density and energy efficiency of magnetocaloric systems. We have developed a new type of thermal control device, i.e., a silicon mechanical thermal switch capacitor. In this paper we first review recently developed thermal switches based on MEMS and present the operation and structure of our new thermal switch capacitor. Then, the results of the parametric experimental study on the thermal contact resistance, as one of the most important parameters affecting the thermal performance of the device, are presented. These experimental data were later used in a numerical model for a magnetocaloric device with a thermal switch-capacitor. The results of the study show that for a single embodiment, a maximum cooling power density of 970 W/m2 (510 W/kgmcm) could be achieved for a zero-temperature span and an operating frequency of 5 Hz. However, a larger temperature span could be achieved by cascading multiple magnetocaloric elements with thermal switch capacitors. We have shown that the compact thermal switch capacitor can be used in caloric devices, even with small temperature variations, and can be used in a variety of practical applications requiring thermal regulation.

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Section: Numerical Simulationsmentioning

confidence: 93%