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A high-gain non-isolated DC-DC converter is proposed with a inversely coupled inductor and a voltage lift cell. Energy stored in the leakage inductance of the coupled inductor is recycled through a voltage lift cell to obtain high voltage conversion ratio. The operation of the proposed converter is explained using its equivalent circuits which are used to derive static gain expression. The operation...
To achieve high efficiency and power output, thermoelectric module geometry needs to be carefully designed. Thermoelectric module height is a major design parameter that can significantly influence output power. This paper present a mathematical model of thermoelectric generator derived from fundamental transportation equation. Module height optimization is conducted to achieve maximum power. The...
Microgenerators are considered to become a substantial part of the decentralised power generation system in the near future. Biomass is widely used as heat source in the Nordics and wood-fired stoves serve as point heat sources for both homes and outdoor cabins. By using residual/waste heat from wood stoves the thermoelectric generator (TEG) based generation units can become an auxiliary source of...
Rural electrification in an archipelago country like Indonesia is a challenge. Indonesian government has stated that basic need of electricity is 60 kWh, however it is not easy to fulfill it. Fortunately, Indonesia is rich in biomass potency. Therefore, converting biomass energy to electricity might be a solution to the country electricity problem. A simple thermal energy harvesting system comprised...
A method of measuring the thermal conductance and the heat capacity of a nanowire is presented. The nanowire is suspended in vacuum to ensure the thermal isolation, and the resistance is measured with respect to the square of the current to obtain the thermal conductance in the length direction. The heat capacity is evaluated by the frequency response of the 3f component of the voltage across the...
This paper presents considerations on the possibility to use thermoelectric generators at low temperatures to recover waste heat recovery applications, especially from geothermal energy. Thermoelectric generators have a satisfactory efficiency, when they are usually used in conditions with high gradient of temperatures. However, there are many applications, which lose important quantities of energy...
The performance of the hybrid structures PV/TEG/STC which consist of photovoltaic cells PV, thermoelectric elements TEG and solar collector STC is studied in this paper function of different levels of illumination from 30 suns to 130 suns (1 sun = 1000 W/m2). The concentrated light is obtained using a solar simulator with four parabolic xenon lamps and an optical mixer to ensure the quasi homogenous...
The paper contemplated the possibility of using the power thermobattery with special converters that operate from voltages in the tens of millivolts. Two such converters have been developed; their characteristics have been measured and documented. The only thermobattery with such a converter is able to supply low-power devices from the temperature difference of one tenth of a degree Celsius.
The report describes the device power, created on the basis of the thermoelectric effect. The Peltier module of the generator type is used as the main element of the conversion of thermal energy into electrical energy. The structure of the generator system being developed, the results of testing the individual Peltier element and the test tests of the assembled power supply are described.
Construction and technology of multisectional thermoelements for generators working at the temperatures up to 1200 K were developed. Semiconductor materials with increased dimensionless thermoelectric figure of merit (ZT up to 1.4) were proposed for the fabrication of thermoelement sections. Complex investigations of thermal and electrical parameters for thermoelectric materials were carried out....
A Recent interest in delivering better quality health care services is growing rapidly and leads to the development of a Wireless Body Area Network (WBAN) in the medical field. This network collects many sensors placed on the body of human. Since the sensor nodes are handled by batteries, they operate on limited power. Thus, improving the network lifetime through an efficient energy harvesting from...
A low-input-voltage, highly efficient single-inductor-dual-output (SIDO) boost converter fabricated in 0.18 μm CMOS process is presented for thermoelectric energy harvesting. Two key technologies are implemented to accept input voltage down to 20 mV and to achieve 69 % conversion efficiency at 100 mV, which is the highest conversion efficiency reported to date for such a device. The first key is a...
This paper describes a model and its PSPICE simulation for a hybrid electric generator that is composed of a photovoltaic cell and a thermoelectric generator. The focus is to combine both models to obtain a hybrid system model. The electrothermal models of the photovoltaic cell and thermoelectric generator are described. The simulations are done using the NI Multisim electronic circuit simulators...
This paper presents a reliable solution for power supply by using thermal energy harvesting by means of the micro thermoelectric generator (TEG). The construction of thermocouple in achieving maximum power output is investigated which include the width and length of the thermoelements for a fixed value of the thickness of thermoelements. For the structure design, several TEGs configuration is tested...
A multiple-source energy harvesting system is proposed to harvest the thermal and RF energy sources efficiently. The proposed architecture combines a multi-input boost converter with an RF rectifier for DC and AC energy harvesting simultaneously. To achieve the maximum power extraction from an RF rectifier, an equivalent circuit model of the RF rectifier is developed for design consideration. The...
Industrial energy consumption represents a large part of the energy flow in the United States and it would probably be similar in many other countries. Coal or gas fired furnaces are a major component of the energy consumption to supply high temperatures. Refractory wall is indispensable along the furnace pathway designed for melting or processing materials. Unfortunately, more than a fraction of...
In this paper we introduce FYPSim, a system-level framework with application to the design of wireless sensor networks. We illustrate some of the key features of the proposed framework in terms of modeling energy harvesting technologies, evaluating energy storage technologies, and comparing energy prediction algorithms.
This paper presents an energy harvesting system for adaptation with thermoelectric generators (TEG). The TEG system is a dc power source based on Seebeck effect, which utilizes the temperature gradient between hot and cold sides of the TEG module. The output voltage is highly dependent on temperature difference. A DC-DC converter is needed to regulate the output power of the TEG and to actively track...
This paper proposes an energy harvesting system for wireless, wearable, and low power health care applications. It discusses the design of a bracelet-like device that converts the difference of temperature between the human body and ambient surrounding using a thermoelectric generator (TEG). The temperature difference causes a small potential difference; an ultra-low voltage is supplied to a step-up...
This paper presents a thermoelectric generator (TEG) as a waste heat recovery system (WHRS) for commercial vehicles (CVs), for light, medium and heavy duty. An analysis of the potential and a close investigation of the limitations are given. The use of this system in future in combination with diesel, dual fuel, or gas combustion engines and in hybrid powertrains is discussed as a promising solution...
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