A5059469390- Magnetic and transport properties of perovskites and related materials
- Chemical and Physical Properties in Aqueous Solutions
- Refrigeration and Air Conditioning Technologies
- Phase Equilibria and Thermodynamics
- Thermodynamic properties of mixtures
- Thermal Expansion and Ionic Conductivity
- Shape Memory Alloy Transformations
- Carbon Dioxide Capture Technologies
- Heat Transfer and Boiling Studies
- Integrated Energy Systems Optimization
- Advanced Thermodynamics and Statistical Mechanics
- Magnetic Properties of Alloys
- Heat Transfer and Optimization
- Spacecraft and Cryogenic Technologies
- Advanced Thermodynamic Systems and Engines
- Adsorption and Cooling Systems
- Thermodynamic and Exergetic Analyses of Power and Cooling Systems
- Cavitation Phenomena in Pumps
- Advancements in Solid Oxide Fuel Cells
- Electronic and Structural Properties of Oxides
- Spectroscopy and Quantum Chemical Studies
- Hydraulic and Pneumatic Systems
- Physics of Superconductivity and Magnetism
- Building Energy and Comfort Optimization
- Chemical Thermodynamics and Molecular Structure
Hohai University
2024-2025
Technical University of Denmark
2019-2024
Sun Yat-sen University
2017-2022
Universidad de Londres
2016
Queen Mary University of London
2016
Designing and fabricating multifunctional microcapsules are of considerable interest in both academic industrial research aspects. This work reports an innovative approach to fabricate composite capsules with high UV ultrasound responsive functionalities that can be used as external triggers for controlled release, yet enhanced mechanical strength make them survive a harsh environment. Needle-like TiO2 nanoparticles (NPs) were produced situ into layer-by-layer (LbL) polyelectrolyte (PE)...
We present the experimental results for a rotary magnetocaloric prototype that uses concept of active magnetic regeneration, presenting an alternative to conventional vapor compression cooling systems. Thirteen packed-bed regenerators subjected rotating two-pole permanent magnet with maximum field 1.44 T are implemented. It is first performance assessment gadolinium spheres as refrigerant and water mixed commercial ethylene glycol heat transfer fluid. The importance various operating...
The design of a rotary active magnetic regenerator heat pump device with multi-bed concept is presented. Important features are the rotating two-pole magnet assembly, laminated iron ring, 13 fixed tapered beds, and dynamically adjustable parallel flow circuit. optimized was developed optimally shaped segments optimum remanence for desired field distribution oscillating between 0 1.44 T in air gap. ring to reduce eddy currents, allowing run at cycle frequencies up 3 Hz. housing respect...
The development of novel regenerators for caloric cooling applications requires a detailed evaluation their thermo-hydraulic properties. Structures similar to shell-and-tube heat exchangers are one the most promising geometries elastocaloric technology since they exhibit high thermal performance and can be applied under compressive loading overcome limited fatigue life materials normally experienced in tension. However, properties shell-and-tube-like structures at conditions relevant...
In the field of marine resource development, conventional axial-flow adjustable-blade pumps rely on monolithic rotation rigid blades for operational condition regulation, a mechanism constrained by simplistic angular adjustments that inadequately adapt to dynamic and complex environment. To address this limitation, study proposes novel angle-adjustment scheme utilizing flexible variable-twist blades, where regulation is achieved through active blade twisting, enabling refined adaptive angle...
The pursuit of sustainable district heating solutions has driven a growing interest in ultra-low temperature (ULTDH) systems, where booster heat pumps (BHPs) play pivotal role despite challenges posed by their efficiency limitations under large glide conditions. This paper investigates the potential drop-in R-1234yf/R-32 zeotropic mixtures BHPs compared to baseline R-134a system, within context ULTDH framework. study focused on viability with composition ratio 80 %/20 % and 90 %/10 %....
We present the performance of an active magnetic regenerator prototype with a multi-bed concept and parallel flow circuit. The applies two-pole permanent magnet (maximum flux density 1.44 T) that rotates over 13 tapered beds mounted on laminated iron yoke ring. Each bed is filled about 262 g spherical particles, distributed in layers ten alloys La(Fe,Mn,Si)13Hy (CALORIVAC HS) different Curie temperatures. Other important features are solenoid valves, monitoring temperatures exiting each at...
Accurate solubility prediction of hydrogen sulfide in aqueous electrolyte solutions is critical for gas exploitation and geological storage. However, there a lack Equation State model that can accurately calculate the solubilities over wide ranges temperature, pressure, salt molality. This work presents modeling study on pure water several sodium solutions. The thermodynamic framework used this an version Cubic-Plus-Association State. model's temperature-dependent ion-gas binary interaction...
Magnetocaloric energy conversion devices (e.g., room air conditioners and household refrigerators) have the potential to significantly reduce emissions associated with refrigerant leakage into atmosphere but still lower efficiencies compared mature vapor compression systems. The efficiency of a magnetocaloric cooling device derives not only from its design characteristics solid refrigerant, hydraulic system, magnet system) operating temperature span also modulating capability. Owing lack...
The aim of this study is to develop more stable magnetocaloric regenerators, made from non-epoxy-bonded La(Fe,Mn,Si)13Hy particles address the instability issues conventional regenerators with a first-order phase transition. stabilized materials are obtained by increasing α − Fe content at expense small reduction adiabatic temperature change. However, experimental results show that non-bonded structure improves regenerator efficiency and reduces pressure drop, potentially compensating for...
Decentral booster heat pumps (BHPs) integrated in ultra-low temperature district heating (ULTDH) systems are deemed a sustainable solution for low-carbon building systems. The performance of BHPs is critical the implementation ULTDH In this study, we experimentally investigate effect refrigerant charge on temperature, pressure, system coefficient (COP), and capacity to evaluate operability sensitivity ULTDH. A performance-guaranteed range proposed ensure feasibility system. We also analyse...
The efficiency of the magnetic refrigeration process strongly depends on heat transfer performance regenerator. As a potential way to improve regenerator, design sub-millimeter hydraulic diameter porous structures is realized by freeze-cast structures. Four regenerators with different pore widths are characterized experimentally and numerically. Empirical parameters determined for correlations flow resistance via 1D model. Thermal effectiveness pressure drop measured thermal-hydraulic...
The design of a thermal regenerator is initially carried out by considering the fundamental influencing variables. For novel solid-state cooling systems using active caloric regenerators, non-linearity coupled phenomena material properties, heat transfer, and hydraulic flow can complicate interpretation experimental simulated results. Based on boundary conditions sinusoidal magnetic field fluid flow, we elucidate operation regenerators deriving easy-to-manage analytical expressions for...
Magnetic refrigeration systems are promising cooling solutions that employ the active magnetic regenerator cycle to achieve practical temperature spans and environmental benefits. The hydraulic system ensures a continuous flow of heat transfer fluid through with reciprocating in each bed is critical performance cycle. Hence, we investigate characteristics parallel circuit rotary system, which consists thirteen trapezoid-shaped regenerators, filled 295 g gadolinium spheres. Fluid controlled...