Journal ArticleDOI
Storage-Less and Converter-Less Photovoltaic Energy Harvesting With Maximum Power Point Tracking for Internet of Things
Yiqun Wang,Yongpan Liu,Cong Wang,Zewei Li,Xiao Sheng,Hyung Gyu Lee,Naehyuck Chang,Huazhong Yang +7 more
TLDR
This paper pioneers a converter-less PV power system with the maximum power point tracking that directly supplies power to the load without the power converters or the energy storage element and achieves an 87.1% of overall system efficiency during a day.Abstract:
Energy harvesting from natural environment gives range of benefits for the Internet of things. Scavenging energy from photovoltaic (PV) cells is one of the most practical solutions in terms of power density among existing energy harvesting sources. PV power systems mandate the maximum power point tracking (MPPT) to scavenge the maximum possible solar energy. In general, a switching-mode power converter, an MPPT charger, controls the charging current to the energy storage element (a battery or equivalent), and the energy storage element provides power to the load device. The mismatch between the maximum power point (MPP) current and the load current is managed by the energy storage element. However, such architecture causes significant energy loss (typically over 20%) and a significant weight/volume and a high cost due to the cascaded power converters and the energy storage element. This paper pioneers a converter-less PV power system with the MPPT that directly supplies power to the load without the power converters or the energy storage element. The proposed system uses a nonvolatile microprocessor to enable an extremely fine-grain dynamic power management in a few hundred microseconds. This makes it possible to match the load current with the MPP current. We present detailed modeling, simulation, and optimization of the proposed energy harvesting system including the radio frequency transceiver. Experiments show that the proposed setup achieves an 87.1% of overall system efficiency during a day, 30.6% higher than the conventional MPPT methods in actual measurements, and thus a significantly higher duty cycle under a weak solar irradiance.read more
Citations
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Journal ArticleDOI
Review of IoT applications in agro-industrial and environmental fields
Jess Martn Talavera,Luis Eduardo Tobn,Jairo Alejandro Gmez,Mara Alejandra Culman,Juan Aranda,Diana Teresa Parra,Luis Alfredo Quiroz,Adolfo Hoyos,Luis Ernesto Garreta +8 more
TL;DR: The results from the review were compiled into an IoT architecture that represents a wide range of current solutions in agro-industrial and environmental fields that are motivated by the need to identify application areas, trends, architectures and open challenges in these two fields.
Journal ArticleDOI
An Autonomous Wireless Body Area Network Implementation Towards IoT Connected Healthcare Applications
TL;DR: The proposed system with solar energy harvesting demonstrates that long-term continuous medical monitoring based on WBAN is possible provided that the subject stays outside for a short period of time in a day.
Journal ArticleDOI
Towards a Green and Self-Powered Internet of Things Using Piezoelectric Energy Harvesting
Mahyar Shirvanimoghaddam,Kamyar Shirvanimoghaddam,Mohammad Mahdi Abolhasani,Majid Farhangi,Vahid Zahiri Barsari,Hangyue Liu,Mischa Dohler,Minoo Naebe +7 more
TL;DR: This survey aims at providing a comprehensive study on energy harvesting techniques as alternative and promising solutions to power the IoT devices and specifically focuses on piezoelectric energy harvesting as one of the most promising solutions.
Journal ArticleDOI
Development of an Indoor Photovoltaic Energy Harvesting Module for Autonomous Sensors in Building Air Quality Applications
Xicai Yue,Matthias Kauer,Mathieu Bellanger,Oliver Beard,Mike Brownlow,Des Gibson,Caspar Clark,Calum MacGregor,Shigeng Song +8 more
TL;DR: The newly established PV powering model, the power consumption requirements of an IoT node can be directly converted into the illumination requirements of the PV energy harvester, making the IPEHPM easy to use.
Proceedings ArticleDOI
Dynamic energy burst scaling for transiently powered systems
TL;DR: This work presents an efficient Energy Management Unit (EMU) to supply generic loads when the average harvested power is much smaller than required for sustained system operation, and proposes a dynamic energy burst scaling (DEBS) technique to adjust these bursts to the load's requirements.
References
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Journal ArticleDOI
Improvement and validation of a model for photovoltaic array performance
TL;DR: The five-parameter model is of interest because it requires only a small amount of input data available from the manufacturer and therefore it provides a valuable tool for energy prediction, and could be improved if manufacturer’s data included information at two radiation levels.
Book
Photovoltaic Systems Engineering
Roger Messenger,Amir Abtahi +1 more
TL;DR: In this article, the authors present and propose PV cells for stand-alone and utility-interactive PV systems, and discuss the physics of photovoltaic cells and their applications.
Journal ArticleDOI
A cell-to-module-to-array detailed model for photovoltaic panels
Hongmei Tian,Hongmei Tian,Fernando Mancilla-David,Kevin Ellis,Eduard Muljadi,Peter E. Jenkins +5 more
TL;DR: In this paper, a modified current-voltage relationship for the single-diode model is presented, based on the well-known equivalent circuit for a single photovoltaic (PV) cell.
Journal ArticleDOI
A Batteryless 19 $\mu$ W MICS/ISM-Band Energy Harvesting Body Sensor Node SoC for ExG Applications
Yanqing Zhang,Fan Zhang,Yousef Shakhsheer,Jason Silver,Alicia Klinefelter,Manohar Nagaraju,James Boley,J. Pandey,Aatmesh Shrivastava,Eric Carlson,A. Wood,Benton H. Calhoun,Brian Otis +12 more
TL;DR: This SoC is designed so the integration and interaction of circuit blocks accomplish an integrated, flexible, and reconfigurable wireless BSN SoC capable of autonomous power management and operation from harvested power, thus prolonging the node lifetime indefinitely.
Proceedings ArticleDOI
Everlast: long-life, supercapacitor-operated wireless sensor node
Farhan Simjee,Pai H. Chou +1 more
TL;DR: Experimental results show that Everlast can achieve low power consumption, long operational lifetime, and high transmission rates, something that traditional sensor nodes cannot achieve simultaneously and must trade-off.