scholarly journals Analysis of Thermoelectric Energy Harvesting with Graphene Aerogel-Supported Form-Stable Phase Change Materials

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2192 ◽  
Author(s):  
Chengbin Yu ◽  
Young Seok Song
Keyword(s):  
Energy Harvesting ◽  
Phase Change ◽  
Stable Phase ◽  
Maximum Output ◽  
Graphene Aerogel ◽  
External Temperature ◽  
Heating And Cooling ◽  
Thermoelectric Power Generator ◽  
Thermoelectric Energy ◽  
Thermoelectric Energy Harvesting

Graphene aerogel-supported phase change material (PCM) composites sustain the initial solid state without any leakage problem when they are melted. The high portion of pure PCM in the composite can absorb or release a relatively large amount of heat during heating and cooling. In this study, these form-stable PCM composites were used to construct a thermoelectric power generator for collecting electrical energy under the external temperature change. The Seebeck effect and the temperature difference between the two sides of the thermal device were applied for thermoelectric energy harvesting. Two different PCM composites were used to collect the thermoelectric energy harvesting due to the different phase transition field in the heating and cooling processes. The graphene nano-platelet (GNP) filler was embedded to increase the thermal conductivities of PCM composites. Maximum output current was investigated by utilizing these two PCM composites with different GNP filler ratios. The thermoelectric energy harvesting efficiencies during heating and cooling were 62.26% and 39.96%, respectively. In addition, a finite element method (FEM) numerical analysis was conducted to model the output profiles.

A Compact Multi-Input Power Conversion System with High Time-Efficiency Inductor–Sharing Technique for Thermoelectric Energy Harvesting Applications

2015 ◽  
Vol 25 (01) ◽  
pp. 1640007 ◽  
Author(s):  
Chia-Lun Chang ◽  
Tai-Cheng Lee
Keyword(s):  
Energy Harvesting ◽  
Output Power ◽  
Power Conversion ◽  
Maximum Output Power ◽  
Maximum Output ◽  
Power Extraction ◽  
Thermoelectric Energy ◽  
Thermoelectric Energy Harvesting ◽  
Energy Harvesting System ◽  
Power Capability

A compact multi-input thermoelectric energy harvesting system implemented in a 0.18[Formula: see text][Formula: see text]m CMOS technology is proposed to extract electrical energy from human body heat. By combining the techniques on inductor sharing and bidirectional power converter, the harvesting- and regulating-stage circuits in conventional energy harvesting system can be merged into a single-stage circuit. With the proposed duty-cycle-based strategy for maximum power extraction and the high-efficiency timing scheme for inductor sharing, the proposed multi-input thermoelectric energy harvesting system can ensure optimal power transfer from each thermoelectric energy source without sacrificing power conversion efficiency (PCE) and maximum output power capability. The peak PCE is achieved at 58.5%, the maximum end-to-end output power is 2.43[Formula: see text]mW, and the maximum output power capability is 32.4[Formula: see text]mW while the storage capacitor is fully charged.

Thermoelectric Energy Harvesting Electronic Skin (e-Skin) Patch with Reconfigurable Carbon Nanotube Clays

Nano Energy ◽  
2021 ◽  
pp. 106156
Author(s):  
Min Hyouk Kim ◽  
Chang Hee Cho ◽  
Jun Su Kim ◽  
Tae Uk Nam ◽  
Woo-Sik Kim ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Energy Harvesting ◽  
Skin Patch ◽  
Electronic Skin ◽  
Thermoelectric Energy ◽  
Thermoelectric Energy Harvesting
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