Design and Realization of Micropower Processing System for Utilization of the Thermal Energy in Compact Solar Energy Harvesters

2021 ◽  
Author(s):  
Mariya P. Aleksandrova ◽  
Maria Petrovska ◽  
Svetozar K. Andreev ◽  
Georgi D. Kolev ◽  
Valentin H. Videkov
Keyword(s):  
Solar Energy ◽  
Thermal Energy ◽  
Processing System ◽  
Energy Harvesters

scholarly journals Piezoelectric and electrostatic bimetal-based thermal energy harvesters

2013 ◽  
Vol 476 ◽  
pp. 012062 ◽  
Author(s):  
A Arnaud ◽  
S Boisseau ◽  
S Monfray ◽  
O Puscasu ◽  
G Despesse ◽  
...  
Keyword(s):  
Thermal Energy ◽  
Energy Harvesters

Micro Solar Thermal Collector Glazing for Enhanced Thermal Energy Harvesting

2012 ◽  
Author(s):  
E. Ogbonnaya ◽  
L. Weiss
Keyword(s):  
Solar Energy ◽  
Thermal Energy ◽  
Alternative Energy ◽  
Capture Efficiency ◽  
Solar Thermal ◽  
Small Scale ◽  
Collector Plate ◽  
Research Areas ◽  
Area Of Interest ◽  
Solar Thermal Collector

Increasing focus on alternative energy sources has produced significant progress across a wide variety of research areas. One particular area of interest has been solar energy. This has been true on both large and small-scale applications. Research in this paper presents investigations into a small-scale solar thermal collector. This approach is divergent from traditional micro solar photovoltaic devices, relying on transforming incoming solar energy to heat for use by devices like thermoelectrics. The Solar Thermal Collector (STC) is constructed using a copper collector plate with electroplated tin-nickel selective coating atop the collector surface. Further, a unique top piece is added to trap thermal energy and reduce convective, conductive, and radiative losses to the surrounding environment. Results show a capture efficiency of 92% for a collector plate alone when exposed to a 1000 W/m2 simulated solar source. The addition of the top “glazing” piece improves capture efficiency to 97%. Future work will integrate these unique devices with thermoelectric generators for electric power production. This will yield a fully autonomous system, capable of powering small sensors or other devices in remote locations or supplementing existing devices with renewable energy.

Ocean Thermal Energy Conversion (OTEC) State of the Art

2017 ◽  
Author(s):  
E.P. Garduño Ruiz ◽  
◽  
A. García Huante ◽  
Y. Rodríguez Cueto ◽  
J.F. Bárcenas Graniel ◽  
...  
Keyword(s):  
Solar Energy ◽  
Energy Conversion ◽  
Thermal Energy ◽  
State Of The Art ◽  
Ocean Water ◽  
Surface Part ◽  
Ocean Thermal Energy Conversion ◽  
Thermal Energy Conversion ◽  
Sea Bottom ◽  
Ocean Thermal Energy

The oceans function as large collectors of solar energy, which recently the human has had the interest to study. Ocean water retains approximately 15% of the totalof solar energy as thermal energy. The technology that allows generatingenergy through temperature differences the ocean is called Conversion Ocean Thermal Energy (otec). This type of energy is concentrated in the surface part of seawater and decreases exponentially with increasing depth, as the sea ​​bottom

Thermal energy harvesters with piezoelectric or electrostatic transducer

2014 ◽  
Author(s):  
Piotr Prokaryn ◽  
Krzysztof Domański ◽  
Michał Marchewka ◽  
Daniel Tomaszewski ◽  
Piotr Grabiec ◽  
...  
Keyword(s):  
Thermal Energy ◽  
Energy Harvesters

scholarly journals Computer image processing and neural network technology for boiler thermal energy diagnosis

2020 ◽  
Vol 24 (5 Part B) ◽  
pp. 3059-3068
Author(s):  
Qinghong Wu
Keyword(s):  
Neural Network ◽  
Image Processing ◽  
Thermal Energy ◽  
Processing System ◽  
Heat Energy ◽  
Image Feature ◽  
The Neural Network ◽  
Computer Image Processing ◽  
On Line ◽  
Parameter Values

The paper uses the flame image processing technology to diagnose the furnace flame combustion achieve the measurement of boiler heat energy. The paper obtains the combustion image of the flame image processing system, and extracts the flame image characteristics of the boiler thermal energy diagnosis, constructs the neural network model of the boiler thermal energy diagnosis, and trains and tests the extracted flame image feature parameter values as the input of the neural network. A rough diagnosis of the boiler?s thermal energy is obtained while predicting the state of combustion. According to the research results, a boiler thermal energy diagnosis system was designed and tested on the boiler of 200 MW unit. The experimental results confirmed the applicability of the system, which can realize on-line monitoring of boiler heat energy and evaluate the combustion situation.

Experimental Investigation of Thermoacoustic-Piezoelectric Energy Harvesters and Refrigerators With Dynamic Magnifiers

2013 ◽  
Author(s):  
M. Nouh ◽  
O. Aldraihem ◽  
A. Baz
Keyword(s):  
Temperature Gradient ◽  
Thermal Energy ◽  
Acoustic Waves ◽  
Waste Heat ◽  
Mechanical Impedance ◽  
Acoustic Resonator ◽  
Critical Threshold ◽  
Energy Harvesters ◽  
Piezoelectric Energy ◽  
Theoretical Results

Conventional Thermoacoustic-Piezoelectric (TAP) energy harvesters convert thermal energy, such as solar or waste heat energy, directly into electrical energy without the need for any moving components. The input thermal energy generates a steep temperature gradient along a porous medium. At a critical threshold of the temperature gradient, self-sustained acoustic waves are developed inside an acoustic resonator. The associated pressure fluctuations impinge on a piezoelectric diaphragm, placed at the end of the resonator. The reverse phenomenon results in piezo-driven thermoacoustic refrigerators (PDTARs). A pressure wave driven by a piezo-speaker induces a temperature gradient across the porous body. In this study, the TAP harvester and the PDTAR are coupled with auxiliary elastic structures in the form of simple spring-mass systems to enhance their performance. The proposed addition is referred to as a dynamic magnifier and has been shown in different areas to amplify significantly the deflection of vibrating structures. A comprehensive model of the dynamically magnified thermoacoustic-piezoelectric (DMTAP) system has been developed earlier that includes equations of motions of the system’s mechanical components, the harvested voltage, the mechanical impedance of the coupled structure at the resonator end as well as the equations necessary to compute the self-excited frequencies of oscillations inside the acoustic resonator. Theoretical results confirmed significant amplification of the harvested power is feasible if the magnifier’s parameters are properly chosen. The performance of experimental prototypes of a DMTAP harvester and a PDTAR with a dynamic magnifier are examined here. The obtained experimental findings are validated against the theoretical results. Dynamic magnifiers serve as a novel approach to enhance the effectiveness of thermoacoustic energy harvesting and refrigeration.

Solar Energy Storage

2014 ◽  
pp. 1550-1578
Author(s):  
Ahmed Elgafy
Keyword(s):  
Energy Storage ◽  
Solar Energy ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Research Work ◽  
Feasibility Studies ◽  
Green Energy ◽  
Advanced Materials ◽  
Solar Thermal Energy ◽  
Solar Energy Storage

With the urgent need to harvest and store solar energy, especially with the dramatic unexpected changes in oil prices, the design of new generation of solar energy storage systems has grown in importance. Besides diminishing the role of the oil, these systems provide green energy which would help reducing air pollution. Solar energy would be stored in different forms of energy; thermal, electric, hybrid thermal/electric, thermochemical, photochemical, and photocapacitors. The nature of solar energy, radiant thermal energy, magnifies the role and usage of thermal energy storage (TES) techniques. In this chapter, different techniques/technologies for solar thermal energy storage are introduced for both terrestrial and space applications. Enhancing the performance of these techniques using nanotechnology is introduced as well as using of advanced materials and structures. The chapter also introduces the main features of the other techniques for solar energy storage along with recent conducted research work. Economic and environment feasibility studies are also introduced.

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