An estimate of the ultralow waste heat available in the European Union

Luberti, Mauro; Gowans, Robert; Finn, P.; Santori, Giulio

doi:10.1016/j.energy.2021.121967

Cited by 31 publications

(12 citation statements)

References 68 publications

(95 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To reduce resource consumption and to develop an energy-efficient society, energy utilizing processes should be optimized, as about two-thirds of primary energy are wasted as heat [ 1 ]. Around 60% of waste heat lost is of low or ultralow grade (heat at temperatures between ambient temperature and 80 °C) [ 2 ]. While a perspective method for transforming waste thermal energy back into useful electrical power is to use effective thermoelectric generators (TEGs).…”

Section: Introductionmentioning

confidence: 99%

Positive and Negative Changes in the Electrical Conductance Related to Hybrid Filler Distribution Gradient in Composite Flexible Thermoelectric Films Subjected to Bending

Bugovecka

Buks²,

Andzane

et al. 2023

Nanomaterials

View full text Add to dashboard Cite

P-type multiwalled carbon nanotubes (MWCNTs), as well as heterostructures fabricated by direct deposition of inorganic thermoelectric materials as antimony and bismuth chalcogenides on MWCNT networks are known as perspective materials for application in flexible thermoelectric polymer-based composites. In this work, the electrical response of three types of Sb2Te3-MWCNT heterostructures-based flexible films—free standing on a flexible substrate, encapsulated in polydimethylsiloxane (PDMS), and mixed in polyvinyl alcohol (PVA) is studied in comparison with the flexible films prepared by the same methods using bare MWCNTs. The electrical conductance of these films when each side of it was subsequently subjected to compressive and tensile stress during the film bending down to a 3 mm radius is investigated in relation to the distribution gradient of Sb2Te3-MWCNT heterostructures or bare MWCNTs within the film. It is found that all investigated Sb2Te3-MWCNT films exhibit a reversible increase in the conductance in response to the compressive stress of the film side with the highest filler concentration and its decrease in response to the tensile stress. In contrast, free-standing and encapsulated bare MWCNT networks with uniform distribution of nanotubes showed a decrease in the conductance irrelevant to the bending direction. In turn, the samples with the gradient distribution of the MWCNTs, prepared by mixing the MWCNTs with PVA, revealed behavior that is similar to the Sb2Te3-MWCNT heterostructures-based films. The analysis of the processes impacting the changes in the conductance of the Sb2Te3-MWCNT heterostructures and bare MWCNTs is performed. The proposed in this work bending method can be applied for the control of the uniformity of distribution of components in heterostructures and fillers in polymer-based composites.

show abstract

Section: Introductionmentioning

confidence: 99%

Positive and Negative Changes in the Electrical Conductance Related to Hybrid Filler Distribution Gradient in Composite Flexible Thermoelectric Films Subjected to Bending

Bugovecka

Buks²,

Andzane

et al. 2023

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…The current trends in electrification of heating and transportation along with deployment of carbon capture processes depict a future in which the renewable electricity generation will not be enough to match all the users . Processes that turn low temperature waste heat into useful outputs are pivotal for mitigating the future energy shortage . In the family of low-temperature-heat-driven technologies, temperature swing sorption (TSS) processes stand out in terms of temperature level required.…”

Section: Introductionmentioning

confidence: 99%

“…1 Processes that turn low temperature waste heat into useful outputs are pivotal for mitigating the future energy shortage. 2 In the family of low-temperature-heatdriven technologies, temperature swing sorption (TSS) processes stand out in terms of temperature level required. Presently, TSS can suit a wide range of diverse applications such as desalination, 3 drying, 4 heating and cooling, 5 heat storage, 6 electricity generation, 7 and greenhouse gas capture.…”

Section: Introductionmentioning

confidence: 99%

Water Adsorption on AQSOA-FAM-Z02 Beads

2022

Self Cite

View full text Add to dashboard Cite

Water/AQSOA-FAM-Z02 adsorption equilibrium data have been measured using two gravimetric systems at 30 °C, 50 °C, and 70 °C in the range 1−90% relative humidity (RH). The data were found to conform to a type IV adsorption isotherm and have been correlated with the Rigid Adsorbent Lattice Fluid dual site model in the range 1−50% RH, which has been shown to reproduce the experimental results with an average absolute deviation in line with uncertainties measured from duplicate and replicate experiments. The adsorption and desorption data were found not to overlap even at 1% RH, resulting in an open hysteresis under the experimental conditions studied. The Rigid Adsorbent Lattice Fluid dual site model adapted to take into account a nondesorbing fraction of pores reproduced the experimental desorption curves providing an overall description of the system for use in adsorption process simulations. The isosteric heats of adsorption obtained show a complex concentration dependence with a local maximum (84.2 kJ mol −1 ) and minimum (55.8 kJ mol −1 ) which are values consistent with the ranges found in the literature.

show abstract

“…As the electrochemical potential is dependent on the temperature, a thermoelectric voltage is generated when the two electrodes are exposed to different temperatures. The voltage (ΔV) generated by the temperature difference (ΔT) is called the Seebeck coefficient, which is expressed as Equation (1).…”

Section: Introductionmentioning

confidence: 99%

“…Heat is a ubiquitous source of energy, yet huge amounts of low-grade heat are constantly discarded without being properly exploited in industrial sectors, including power plants, chemical and steel plants, as well as pulp and paper mills. For example, the annual emissions of ultralow-grade waste heat under 100 °C accounted for 8.8 × 10 6 TJ in the European Union [1] and 1.5 × 10 4 TJ in Japan in 2018. [2] As this temperature is too low to be used in conventional steam turbines, new technology is required to reuse ultralow-grade waste heat.…”

Section: Introductionmentioning

confidence: 99%

Advancement of Electrochemical Thermoelectric Conversion with Molecular Technology

et al. 2022

View full text Add to dashboard Cite

Thermocells are a thermoelectric conversion technology that utilizes the shift in an electrochemical equilibrium arising from a temperature difference. This technology has a long history; however, its low conversion efficiency impedes its practical usage. Recently, an increasing number of reports have shown drastic improvements in thermoelectric conversion efficiency, and thermocells could arguably represent an alternative to solid thermoelectric devices. In this Minireview, we regard thermocells as molecular systems consisting of successive molecular processes responding to a temperature change to achieve energy generation. Various molecular technologies have been applied to thermocells in recent years, and could stimulate diverse research fields, including supramolecular chemistry, physical chemistry, electrochemistry, and solid-state ionics. These research approaches will also provide novel methods for achieving a sustainable society in the future.

show abstract

An estimate of the ultralow waste heat available in the European Union

Cited by 31 publications

References 68 publications

Positive and Negative Changes in the Electrical Conductance Related to Hybrid Filler Distribution Gradient in Composite Flexible Thermoelectric Films Subjected to Bending

Positive and Negative Changes in the Electrical Conductance Related to Hybrid Filler Distribution Gradient in Composite Flexible Thermoelectric Films Subjected to Bending

Water Adsorption on AQSOA-FAM-Z02 Beads

Advancement of Electrochemical Thermoelectric Conversion with Molecular Technology

Contact Info

Product

Resources

About