Performance enhancement of a thermoelectric harvester with a PCM/Metal foam composite

Borhani, Sedigheh; Hosseini, Mohammad; Pakrouh, R.; Ranjbar, A.A.; Nourian, Amir

doi:10.1016/j.renene.2021.01.020

Cited by 46 publications

(13 citation statements)

References 36 publications

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“…It has the characteristics of direct power generation and environmental protection, and has been widely used. Borhani et al 120 studied the influence of PCMs and metal foams on the properties of TEG. As shown in Figure 8d, they added the paraffin RT35 into the cold side of TEG, which is used as heat dissipation.…”

Section: Metal-based Porous Materialsmentioning

confidence: 99%

“…119 (d) Schematic of boundary conditions of the model. 120 (e) Temperature contours for different pore size (radius) with 50% porosity at 125 s without convection (1) 4-5 mm pore size (2) 5-6 mm pore size and with convection (3) 4-5 mm pore size (4) 5-6 mm pore size 121 [Color figure can be viewed at wileyonlinelibrary.com] minerals such as sepiolite are often used in construction because of their wide distribution and low cost. Dehmous et al 130 prepared three kinds of concrete with bentonite, sepiolite and silica gel supported PCMs, respectively, and compared and analyzed the performance changes of concrete.…”

Section: Mineral-based Porous Materialsmentioning

confidence: 99%

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Construction strategies and thermal energy storage applications of shape‐stabilized phase change materials

Yan

Wang

et al. 2021

J of Applied Polymer Sci

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Phase change materials (PCMs) are usually used in latent thermal energy storage systems to address the mismatch between heat energy supply and demand, due to their high energy storage density, high-latent heat, and almost constant temperature during phase change process. However, the low-thermal conductivity of PCMs and severe leakage during phase change limit their practical applications. Thus, extensive efforts have been devoted to constructing shapestabilized PCMs (SSPCMs). In this review, recent advances of the construction strategies and thermal energy storage applications of SSPCMs are summarized. Especially, the microencapsulated PCMs, SSPCMs based on porous scaffolds, as well as their potential applications are highlighted. Finally, the future perspectives and remaining challenges in this research field are prospected.

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Section: Metal-based Porous Materialsmentioning

confidence: 99%

Section: Mineral-based Porous Materialsmentioning

confidence: 99%

Construction strategies and thermal energy storage applications of shape‐stabilized phase change materials

Yan

Wang

et al. 2021

J of Applied Polymer Sci

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“…Among the TESSs, the PCM-based ones are acquiring more and more importance due to the high latent heat storage capability of these materials which results in a significant storage volume reduction for a fixed quantity of energy stored [2]. Many papers have been devoted to the characterization of latent thermal energy storage systems (LTESSs) and nowadays PCM LTESSs find applications in several fields: civil [1,3], textile [4,5], food transport [6,7], agriculture [8], air conditioning [9], additive manufacturing (AM) for heat exchangers (HXs) [10], electronics [11][12][13], solar systems [14,15], and automotive [16][17][18][19]. Nazir et al [20] propose a deep overview about several kinds of PCMs (different for their chemistry, phase change mechanisms, and melting points), focusing on their exploitation in several applications.…”

Section: Introductionmentioning

confidence: 99%

“…As a matter of fact, low PCM thermal conductivity limits the potential of these materials, leading to low heat storage/release rates and a low utilization efficiency of the stored energy [29]. Different methods have been proposed to increase PCM thermal conductivity: the addition of fins [30][31][32], nanoparticles [33][34][35][36], both fins and nanoparticles together [37], graphite [38], carbon fibers [39], metal wools [40], 3D metallic periodic structures [41,42], and high-porosity metal foams [8,28,29,[43][44][45][46][47][48]. This last solution has proven to be very effective due to the high thermal conductivity of the metal foams [49], the significant surface-area-to-volume ratio, the highly interconnected structure, and the natural fluid mixing effect [29].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Latent Thermal Energy Storages (LTESs) Based on Pure and Copper-Foam-Loaded PCMs

et al. 2022

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In this work, a commercial paraffin PCM (RT35) characterized by a change range of the solid-liquid phase transition temperature Ts−l = 29–36 ∘C and the low thermal conductivity λSL = 0.2 W/m K is experimentally tested by submitting it to thermal charging/discharging cycles. The paraffin is contained in a case with a rectangular base and heated from the top due to electrical resistance. The aim of this research is to show the benefits that a 95% porous copper metal foam (pore density PD=20PPI) can bring to a PCM-based thermal storage system by simply loading it, due to the consequent increase in the effective thermal conductivity of the medium (λLOAD = 7.03 W/m K). The experimental results highlight the positive effects of the copper foam presence, such as the heat conduction improvement throughout the system, and a significant reduction in time for the complete melting of the PCM. In addition, the experimental data highlight that in the copper-foam-loaded PCM the maximum temperature reached during the heating process is lower than 20K with respect to the test with pure PCM, imposing the same heat flux on the top (P=3.5 W/m2).

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“…However, exceeding a specific current range, which varies depending on the TEM's material properties, has no additional cooling effect but does increase Joule heating, reducing the TEM's cooling capacity [10]. To increase the coefficient of performance (COP) of TEM used in building cooling applications, researchers combined many methods, such as solar powered TEM [11,12], evaporative cooling [13,14], and thermal energy storage [15,16]. Integration of these additional system increases complexity and overall cost of the configuration [17].…”

Section: Introductionmentioning

confidence: 99%

Performance Improvement of Thermoelectric Air Cooler System by Using Variable-Pulse Current for Building Applications

Irshad

2021

Sustainability

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The thermoelectric air conditioning system (TE-AC) is a small, noiseless alternative to standard vapor compression refrigeration (VCR) systems. The cooling characteristics of a TE-AC system operating under two conditions, i.e., steady current and current pulses, are investigated in this study. This system consists of three thermoelectric modules, a heat sink, and an air circulation fan. The result shows that maximum temperature reduction in cooling side of TE-AC system was achieved at 6 A input current under steady state operation. The optimum performance of the TE-AC system under steady state operation depends upon the combined effect of the cooling load, Joule, Fourier, and Peltier heat. In TE-AC pulse operation, both current width and cooling load applied on the cold side of the thermoelectric module (TEMs) play an important role in achieving optimum cooling performance of the system. When normal input current operation (i.e., no current pulse) was compared to pulse-operated TE-AC system operation, it was found that pulse operation provides an additional average temperature reduction of 3–4 °C on the cold side of TEMs. Although on the hot side, it maintains a temperature in the range of 18 °C to 24 °C to reduce overshoot heat flux. The duration of operation is also important in determining pulse width and pulse amplitude. Minimum and overshoot peak temperature rises during each cycle for longer run operation. In the TE-AC system, the accumulated Joule heat during a current pulse frequently causes a temperature overshoot, which lasts much longer. As a result, the next current pulse was not released until the temperature of TE was restored to its initial value.

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Performance enhancement of a thermoelectric harvester with a PCM/Metal foam composite

Cited by 46 publications

References 36 publications

Construction strategies and thermal energy storage applications of shape‐stabilized phase change materials

Construction strategies and thermal energy storage applications of shape‐stabilized phase change materials

Experimental Investigation on Latent Thermal Energy Storages (LTESs) Based on Pure and Copper-Foam-Loaded PCMs

Performance Improvement of Thermoelectric Air Cooler System by Using Variable-Pulse Current for Building Applications

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