Colloidal Energetic Systems

Chiolerio, Alessandro; Quadrelli, Marco B.

doi:10.1002/ente.201800580

Cited by 15 publications

(12 citation statements)

References 34 publications

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“…The use of colloids, defined as solid nanoparticles dispersed in a carrier fluid, is our natural framework, in a study that starts from a toroidal dynamo (TORODYNA) exploiting thermomagnetic advection, 15 encompasses triboelectric colloids, 16 and finally aims at creating colloidal energy systems. 17 Here, an experimental apparatus for monitoring the shortcircuit current and open-circuit voltage production brought by the PyE colloid under different heating conditions is presented. The colloid under analysis is a dispersion of barium titanate (BaTiO 3 , BT) nanoparticles (NPs), having average diameter of 300 nm, dispersed in a ferrofluid (FF) suspension in kerosene solvent.…”

Section: Discussion Pointsmentioning

confidence: 99%

Liquid-state pyroelectric energy harvesting

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Garofalo

Cecchini

et al. 2020

MRS Energy & Sustainability

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Section: Discussion Pointsmentioning

confidence: 99%

Liquid-state pyroelectric energy harvesting

Bevione

Garofalo

Cecchini

et al. 2020

MRS Energy & Sustainability

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“…Although this field is still mainly unexplored, it is very promising. [20] 2.1. Thermodynamic Machines…”

Section: Current Technologiesmentioning

confidence: 99%

Waste Heat to Power: Technologies, Current Applications, and Future Potential

et al. 2020

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Energy consumption, environmental impact, and sustainability have risen fast through the ranks, achieving the first places in driving investments, policies, and concerns of all countries at any developmental stage. Energy transformation, though, must cope with nonunitary efficiency of devices and processes, which results in a distributed production of waste heat. A reduction of emissions, implying a conversion of waste heat to more noble forms of energy and a concurrent increase in efficiency of the same devices and processes, is of paramount importance. In view of the enthalpy content and distribution of the different sources of waste heat, low‐grade/low‐enthalpy sources below 200 °C are considered the most fertile field for research and development, with an impressive industrial growth rate. Thermodynamic cycles and thermal conversion devices based on the most relevant physical effects are herein introduced and briefly described, including both solutions that already achieved industrial maturity and less developed systems and devices whose study is still in progress. A specific focus on three application domains, selected due to their economic relevance, is done: industrial processes for the vast energy and capital availability, automotive sector for its permeation, and wearable devices for the market size. Limits and opportunities are critically discussed.

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“…So, the right functionalization of TENGs is important in order to build a marketable device for recovery applications, even from unexplored energy sources such as waste heat. The present work is included in a broader research project related to CAS (colloidal autonomous system) concept [ 27 ], in which colloidal devices, properly protected from the external environment by a deformable skin, are used in order to realize a revolutionary system for the purpose of liquid-robotics. With respect to the well-established heavy, steel-based robotics, this kind of technology can be used in harsh environment applications, as space exploration, or the deepest zones of remote lakes and oceans, or post-disaster rescue searches, or even in surgery operations.…”

Section: Introductionmentioning

confidence: 99%

Triboelectric Characterization of Colloidal TiO2 for Energy Harvesting Applications

et al. 2020

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Nowadays, energy-related issues are of paramount importance. Every energy transformation process results in the production of waste heat that can be harvested and reused, representing an ecological and economic opportunity. Waste heat to power (WHP) is the process of converting the waste heat into electricity. A novel approach is proposed based on the employment of liquid nano colloids. In this work, the triboelectric characterization of TiO2 nanoparticles dispersed in pure water and flowing in a fluorinated ethylene propylene (FEP) pipe was conducted. The idea is to exploit the waste heat to generate the motion of colloidal TiO2 through a FEP pipe. By placing an Al ring electrode in contact with the pipe, it was possible to accumulate electrostatic charges due to the triboelectric effect between the fluid and the inner pipe walls. A peristaltic pump was used to drive and control the flow in order to evaluate the performances in a broad fluid dynamic spectrum. The system generated as output relatively high voltages and low currents, resulting in extracted power ranging between 0.4 and 0.6 nW. By comparing the power of pressure loss due to friction with the extracted power, the electro-kinetic efficiency was estimated to be 20%.

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Colloidal Energetic Systems

Cited by 15 publications

References 34 publications

Liquid-state pyroelectric energy harvesting

Liquid-state pyroelectric energy harvesting

Waste Heat to Power: Technologies, Current Applications, and Future Potential

Triboelectric Characterization of Colloidal TiO2 for Energy Harvesting Applications

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