Experimental Study on the Heating Effect of a Wind-Energy Stirring Heater

Liu, Xingran; Sun, Xianpeng; Li, Jianming; Qiu, Xinyang; Kang, Yang; Cao, Yanfei

doi:10.1007/s11630-021-1344-4

Cited by 6 publications

(5 citation statements)

References 7 publications

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“…(1) Sixty-one publications comprise probably all English academic literature about windthermal energy. The most promising windthermal literature to start are the publications from Jwo et al [11] (field trial) and Ždankus et al [48] (laboratory scale) that describe experiments on two different compression-based windthermal applications, the publications from Liu et al [57] (laboratory scale) and Serov et al [54] (laboratory scale) that describe experiments on two different friction-based applications, and the publication from Chen et al [62] (laboratory scale) that describes experiments on an induction-based application. The concept of windpowered thermal energy systems was introduced by Okazaki et al [38], and the article is worth reading.…”

Section: Discussionmentioning

confidence: 99%

“…One experiment investigated the turbine-to-heat efficiency for three different rotor structures. Results show that an optimized rotor structure increases the turbine-to-heat efficiency from 81 to 91% [57]. For a multi-cylinder Taylor-Couette system, the turbine-toheat efficiency is close to 100% [50].…”

Section: Compression-based Windthermal Conversion the General Concept Of Compression-based Windthermal Conversion Usesmentioning

confidence: 94%

“…To make it easier to identify pertinent literature, we provide a brief description of every paper classified by category and conversion principle (Table 2). We recommend the articles from Jwo et al [11] and Ždankus et al [48] to familiarize with compression-based windthermal energy, the articles from Liu et al [57] and Serov et al [54] to familiarize with friction-based windthermal energy, and the article from Chen et al [62] to familiarize with induction-based windthermal energy. The proposed application of a windthermal energy system from Okazaki et al [38] is by far the most-cited article and is worth reading.…”

Section: Bibliometric Analysismentioning

confidence: 99%

“…The authors point out that higher rotational speeds [25,26,52,53], high-viscous working fluids [25,52], high-density fluids [57], and maximum filling of the tank [49,57] will generate more heat.…”

Section: Compression-based Windthermal Conversion the General Concept Of Compression-based Windthermal Conversion Usesmentioning

confidence: 99%

See 3 more Smart Citations

State of the art of windthermal turbines: A systematic scoping review of direct wind-to-heat conversion technologies

Neumeier

Cöster

Pais

et al. 2021

Journal of Energy Resources Technology

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Windthermal turbines convert wind directly into thermal energy. Albeit it is an uncharted field of research, the overall system efficiency and costs of fully developed windthermal turbines are promising; since they can contribute to a sustainable energy transition. We identify the current state of the art of windthermal conversion principles, technology maturity, applications, substitutes, advantages and disadvantages. To scope relevant literature, we follow the Joanna Briggs Institutes selection and screening process resulting in 61 relevant publications from which we identified three main conversion types, namely compression-, friction-, and induction-based windthermal devices. These devices can directly supply thermal energy for space heating or industrial processes, work as a component of wind-powered thermal energy systems, short WTES, or can substitute any conventional or renewable heat device. Although heat is the lowest form of energy, windthermal applications could provide cheap renewable energy that can be stored easily enhancing security of supply. However, these technologies are currently on laboratory-scale, and we suggest scaling up the existing prototypes to engineering-scale. Finally, due to a missing general terminology, we propose to establish one of the terms windthermal energy, ventothermal energy or anemothermal energy to distinguish these specific wind energy conversion technologies.

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Section: Discussionmentioning

confidence: 99%

Section: Compression-based Windthermal Conversion the General Concept Of Compression-based Windthermal Conversion Usesmentioning

confidence: 94%

Section: Bibliometric Analysismentioning

confidence: 99%

Section: Compression-based Windthermal Conversion the General Concept Of Compression-based Windthermal Conversion Usesmentioning

confidence: 99%

See 2 more Smart Citations

State of the art of windthermal turbines: A systematic scoping review of direct wind-to-heat conversion technologies

Neumeier

Cöster

Pais

et al. 2021

Journal of Energy Resources Technology

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“…Therefore, the thermal properties of working-fluid play a very important role in stirring-heating. Based on earlier research [19] on the process of stirring-heating, the temperature rises almost uniformly and linearly, and the effect of the working-fluid's thermophysical properties on the heating effect has been explored preliminarily by using the method of multiple linear regression. Research also has its limitations, which are that the types of working-fluid used are rare, the evaluation index of heating effect is simple, the fitting result is not satisfactory, and the energy change process of stirring is not simulated by CFD.…”

Section: Introductionmentioning

confidence: 99%

Study on the Influence of Working-Fluid’s Thermophysical Properties on the Stirring-Heating

Liu

Sun

et al. 2022

Energies

Self Cite

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The thermophysical properties of a working-fluid play an important role in the process of stirring-heating. The heating process of stirring is accompanied by two processes: the friction between the solid mechanism and the working-fluid and the viscous dissipation of the working liquid. Traditionally, the sensible heat of water-based working-fluids is low, while that of oil-based working-fluids is higher, but the load capacity is relatively low. In order to find a balance between the two, an optimal stirring working-fluid should be selected. In this study, an experimental method was used to study the heating process of 30 kinds of working-fluids. The numerical evaluation model of the effects of thermophysical properties on the comprehensive evaluation index of heat (CEIH) was established by multiple linear regression methods, and a computational fluid dynamics (CFD) tool was used to analyze the heat generation and flow field of different working-fluids in the stirring-heating device. The results show that viscous dissipation is the most important way of stirring-heating. CFD can completely replace the experiment to study the heating effect of stirring. The thermophysical properties of the working-fluid affect the upper circulation and the overall velocity of the double circulation flow. The experimental results and regression model analysis show that specific heat capacity has the greatest effect on the heating effect, but density will also play a positive role in the stirring-heating. Water-based salt solutions such as KCl can achieve a better heating effect, and oil-based working-fluids are not always the best choice.

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Analysis of the Eddy current of water heating device to convert wind energy directly into heat: Case study maldo island, South Korea

Hadadi,

Kang,

Park

et al. 2024

Applied Energy

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Experimental Study on the Heating Effect of a Wind-Energy Stirring Heater

Cited by 6 publications

References 7 publications

State of the art of windthermal turbines: A systematic scoping review of direct wind-to-heat conversion technologies

State of the art of windthermal turbines: A systematic scoping review of direct wind-to-heat conversion technologies

Study on the Influence of Working-Fluid’s Thermophysical Properties on the Stirring-Heating

Analysis of the Eddy current of water heating device to convert wind energy directly into heat: Case study maldo island, South Korea

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