A highly efficient and sustainable heat sink via liquid film boiling in hybrid mesh with active liquid supply

Article Thermodynamics

Hierarchical gradient mesh surfaces for superior boiling heat transfer

Shiwei Zhang et al.

Summary: This study develops a hierarchical gradient mesh surface that exhibits strong wicking effect and rapid bubble detachment, surpassing traditional predictions and providing a new direction for efficient phase change heat transfer.

APPLIED THERMAL ENGINEERING (2023)

Add to Collection

Article Thermodynamics

Design of micro-nano structures for counter flow diverging microchannel heat sink with extraordinarily high energy efficiency

Xingchi Jiang et al.

Summary: This study demonstrates the achievement of high cooling efficiency and low energy consumption through optimization design and nano-technology, greatly improving the heat dissipation performance.

APPLIED THERMAL ENGINEERING (2022)

Add to Collection

Review Green & Sustainable Science & Technology

Approaches and potentials for pool boiling enhancement with superhigh heat flux on responsive smart surfaces: A critical review

Xiao Yuan et al.

Summary: The study discusses the use of hybrid or hierarchical structures with smart materials to enhance the heat transfer coefficient (HTC) and critical heat flux (CHF) in boiling. Surface modifications to improve pool boiling heat transfer are reviewed, including micro/nano structures, coatings and porous surfaces. Smart surfaces that can actively change their wettability characteristics during boiling process are then introduced. The potential of combining micro-nano structures, wettability hybrid structures and smart materials for enhanced heat transfer is discussed, along with the challenges associated with smart surfaces. The review also provides solutions in terms of structure machining, materials selections and fabrication methods. The importance of smart surfaces in various energy and environment applications is emphasized.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2022)

Add to Collection

Article Chemistry, Multidisciplinary

Three-Tier Hierarchical Structures for Extreme Pool Boiling Heat Transfer Performance

Youngsup Song et al.

Summary: In this work, a three-tier hierarchical structure is designed to overcome the trade-off between HTC and CHF. By defining nucleation sites with microcavities and incorporating nanostructures, the bubble coalescence is minimized and evaporation is promoted, leading to significant enhancement in both HTC and CHF compared to a smooth surface.

ADVANCED MATERIALS (2022)

Add to Collection

Review Green & Sustainable Science & Technology

A review on fabrication and pool boiling enhancement of three-dimensional complex structures

Yalong Sun et al.

Summary: This review summarizes the influence of fabrication methods on pool boiling enhancement of three-dimensional complex structures (3D-CS). Traditional machining methods, special machining methods, and other machining methods for fabricating 3D-CS are introduced, and their advantages and disadvantages are summarized. This is significant for the application and commercialization of pool boiling systems.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2022)

Add to Collection

Article Thermodynamics

Experimental investigation and exergy analysis of a high concentrating photovoltaic system integrated with spray cooling

Haifei Chen et al.

Summary: In this study, a high concentration photovoltaic/thermal system with a spray cooling device is proposed to reduce the contact thermal resistance between the solar cell and the heat exchanger. The performance of the new system is evaluated through electrical and thermal analysis, and compared with an independent photovoltaic system. The results show that the hybrid system has higher electrical and thermal efficiency, resulting in improved energy quality.

ENERGY CONVERSION AND MANAGEMENT (2022)

Add to Collection

Article Thermodynamics

Experimental investigation on thermal management of a photovoltaic module using water-jet impingement cooling

Mohammad Javidan et al.

Summary: This study investigated the indoor cooling of photovoltaic modules using a multi-nozzle jet impingement cooling system. Results showed that an increase in liquid mass flow rate and optimal design of the JIC system can improve the electrical efficiency of PV modules, reduce operating temperature, and maintain temperature uniformity.

ENERGY CONVERSION AND MANAGEMENT (2021)

Add to Collection

Article Green & Sustainable Science & Technology

Wicking capability evaluation of multilayer composite micromesh wicks for ultrathin two-phase heat transfer devices

Gong Chen et al.

Summary: The study proposes a multilayer composite micromesh wick (MCMW) to enhance the wicking capability of ultrathin TPHTDs. Experimental results show that MCMW structures significantly enhance wicking capability compared to multilayer single mesh wick structures, providing a convenient and effective alternative to improve thermal performance.

RENEWABLE ENERGY (2021)

Add to Collection

Article Thermodynamics

Flow boiling in a four-compartment heat sink for high-heat flux cooling: A parametric study

Essam M. Abo-Zahhad et al.

Summary: The study investigated flow boiling in a microchannel device using ethanol, acetone, and Novec-7000 coolants. Results showed that Novec-7000 exhibited outstanding cooling capabilities under ultra-high-heat flux conditions, and boiling point is a critical parameter influencing the system performance.

ENERGY CONVERSION AND MANAGEMENT (2021)

Add to Collection

Article Thermodynamics

Enhanced flow boiling in microchannels by incorporating multiple micro-nozzles and micro-pinfin fences

Wenming Li et al.

Summary: The study introduces a new microchannel configuration by combining capillary micro-pinfin fences and multiple micro-nozzles to enhance flow boiling performance, achieving significant improvements in heat transfer on both DI-water and HFE-7100. Especially, a remarkable enhancement in critical heat flux (CHF) has been achieved, showing promising potential for high-power electronics cooling applications.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

Add to Collection

Article Green & Sustainable Science & Technology

An efficient pulsed- spray water cooling system for photovoltaic panels: Experimental study and cost analysis

Amirhosein Hadipour et al.

Summary: Cooling of photovoltaic panels is crucial for enhancing electrical efficiency and extending lifespan. The use of a pulsed-spray water cooling system can improve efficiency and reduce water consumption. From an economic perspective, pulsed-spray water cooling is an efficient new cooling method.

RENEWABLE ENERGY (2021)

Add to Collection

Article Multidisciplinary Sciences

All-day fresh water harvesting by microstructured hydrogel membranes

Ye Shi et al.

Summary: The hydrogel membrane developed combines solar steam water purification and fog collection, enabling all-day fresh water generation. In outdoor tests, it has demonstrated a daily fresh water yield of around 34 liters per square meter, showing potential for alleviating global water scarcity.

NATURE COMMUNICATIONS (2021)

Add to Collection

Article Thermodynamics

Anomalously enhanced light-emitting diode cooling via nucleate boiling using graphene-nanoplatelets coatings

Yi Shen Lim et al.

Summary: The use of graphene-nanoplatelets coated surface enhances boiling efficiency, prolonging the lifespan of light-emitting diodes through various anomalous effects.

ENERGY CONVERSION AND MANAGEMENT (2021)

Add to Collection

Article Thermodynamics

Design and optimization of well-ordered microporous copper structure for high heat flux cooling applications

Chi Zhang et al.

Summary: Capillary-driven boiling using highly-ordered microporous media has shown promise for efficient heat transfer. The study identified two distinct transport regimes and proposed an optimal length scale for porous media area and structural thickness to maximize the critical heat flux of capillary-driven boiling. This research advances the understanding of two-phase flow physics in porous media and provides practical details for the fabrication and optimization of capillary structures for various applications.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

Add to Collection

Article Multidisciplinary Sciences

Liquid film-induced critical heat flux enhancement on structured surfaces

Jiaqi Li et al.

Summary: This study used high-magnification in-liquid endoscopy to investigate bubble behavior during boiling on structured surfaces, revealing the previously unknown coexistence of two distinct three-phase contact lines, resulting in the retention of a thin liquid film between the two contact lines. This finding sheds light on a previously unidentified mechanism governing bubble evolution on structured surfaces and has significant implications for various real systems utilizing bubble formation.

SCIENCE ADVANCES (2021)

Add to Collection

Article Chemistry, Multidisciplinary

Endoscopic Visualization of Contact Line Dynamics during Pool Boiling on Capillary-Activated Copper Microchannels

Jiaqi Li et al.

Summary: This study develops a technique for fabricating ultra-small microchannels on arbitrary metallic materials, and investigates the pool boiling heat transfer performance of copper microchannels, with a focus on three-phase contact line dynamics. The results demonstrate that the scalable microchannel surfaces exhibit superior heat transfer performance, with a maximum heat transfer coefficient enhancement of 930% and ultra-low wall superheat of 5 degrees C.

ADVANCED FUNCTIONAL MATERIALS (2021)

Add to Collection

Article Chemistry, Multidisciplinary