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Thermal to electric conversion
Turbines, Thermoelectric, thermoionic, thermal engines,... key technology to use LENR
by AlainCo of http://www.lenr-forum.com & @alain_co https://twitter.com/alain_co
Curated by Alain Coetmeur
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Phonon-glass electron-crystal thermoelectric clathrates - APS Link ...

Phonon-glass electron-crystal thermoelectric clathrates - APS Link ... | Thermal to electric conversion | Scoop.it
The subject of this review involves interesting phenomena from the viewpoint not only of physics but also of the practical problem of elaborating efficient thermoelectric materials. This review presents a survey of a wide range ...
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Thermoelectric Effect of Current Seebeck Effect

Thermoelectric Effect of Current Seebeck Effect.
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Development of highly efficient silicon thermoelectric materials using nanoscale structure control

Development of highly efficient silicon thermoelectric materials using nanoscale structure control | Thermal to electric conversion | Scoop.it
Bulk Silicon web Home page
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thermoelectricity - Why does a thermoelectric generator need both p and n elements? - Physics Stack Exchange

thermoelectricity - Why does a thermoelectric generator need both p and n elements? - Physics Stack Exchange | Thermal to electric conversion | Scoop.it
Why does a thermoelectric generator need both p and n elements? http://t.co/9WeLOUsppv #thermoelectric
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Supercritical Carbon Dioxide Power Cycles Starting to Hit the Market - Energy Collective

Supercritical Carbon Dioxide Power Cycles Starting to Hit the Market - Energy Collective | Thermal to electric conversion | Scoop.it

Supercritical CO2 power cycles are gaining increasing attention in the engineering world. sCO2 is an ideal working fluid for use in power generating turbines because it offers high efficiency in a compact footprint and can be matched to many different heat sources. sCO2 power turbines could potentially replace steam cycles in a wide variety of power generation applications resulting in higher efficiencies and lower cost of electricity.


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Cooking up the future - Albany Times Union

Cooking up the future - Albany Times Union | Thermal to electric conversion | Scoop.it
ThermoAura, a spinoff from Rensselaer Polytechnic Institute that makes thermoelectric nanocrystals that could one day be used in air conditioners of the future, has opened its first manufacturing facility on Railroad Avenue.
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Small engine packs a punch

Small engine packs a punch | Thermal to electric conversion | Scoop.it
Noise, excessive vibration and relative inefficiency are drawbacks of the piston-based internal combustion engines (ICE) that power today’s lawn and garden equipment, such as leaf blowers and lawn trimmers. But now Massachusetts Institute of Technology startup LiquidPiston has developed a rotary ICE that it says is significantly smaller, lighter and quieter, as well as 20% more fuel-efficient than the ICEs used in small-engine devices.
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Global Energy News / GMZ Energy successfully demonstrates 1 kW thermoelectric generator for Bradley Fighting Vehicle

Article Abstract: GMZ Energy, a market leader in the development of high-temperature thermoelectric generation (TEG) solutions, has successfully demonstrated a 1,000W TEG designed for diesel engine exhaust heat recapture in a Bradley Fighting...
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The Motorship - Organic Rankine Cycle heat recovery technology ready for ships

The Motorship - Organic Rankine Cycle heat recovery technology ready for ships | Thermal to electric conversion | Scoop.it
A new waste heat recovery system from French company Enertime is said to promise flexibility for lower temperature heat sources, writes Wendy Laursen

 

The fluid used by Enertime is HFC-245fa, which is produced worldwide for refrigerant use and is available globally. Handling considerations are the same as for chillers/heat pumps that use the same family of HFC refrigerants. 245fa is not flammable and is kept in a closed loop system, preventing any additional hazards for a ship, says Gilles David, CEO of Enertime.

Machines using ORC have been criticised for their low yield, mainly due to a small difference in temperature between the hot and cold source. An ORC system working at low temperature between a hot source at 150°C and a cold source at 30°C (air) has about 12% efficiency. The ideal efficiency (Carnot efficiency) is, in this case, 23%. The module yield will then be 52%. A cycle using steam would have slightly lower efficiency (10%) and more obvious drawbacks, says Mr David, such as a heavier maintenance requirement due to the steam condensation at the end of the expansion, and higher operational costs (water demineralisation in particular).

 

The ORC system can work with any kind of heat source. The unit can recover heat from a number of different sources singly or in combination including low-temperature jacket cooling from engines, steam or thermal oil systems and pressurised hot water. Exhaust gas from engines or auxiliaries is the main available heat on board ships, and it can be collected through an exhaust gas heat exchanger and brought to the ORC unit using steam, pressurised water or thermal oil.

Therefore, it does not matter if the heat comes from two-stroke, four-stroke, dual-fuel engines or auxiliaries. However, the exhaust gas coming from natural gas combustion can often be cooled down at lower temperature so the heat recovery potential may be higher in LNG-fuelled ships.


Via Duane Tilden, Microgen Concepts
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Duane Tilden's curator insight, December 1, 6:16 PM

"> [...] Enertime’s ORC system produces between 500kW and 1MW of electrical power depending on the available amount of heat. The unit is based on a tailor-made axial turbine and is specifically designed to work in the marine environment. The development work has involved shipyards, shipowners and a classification society, says Mr David.

“Compared to a steam power cycle, ORC systems need very low maintenance, display good part-load efficiency, high availability and can be operated without permanent monitoring,” he said. “Daily operation and maintenance can be carried out without specific qualification.”

The ORC system can work with any kind of heat source. The unit can recover heat from a number of different sources singly or in combination including low-temperature jacket cooling from engines, steam or thermal oil systems and pressurised hot water. Exhaust gas from engines or auxiliaries is the main available heat on board ships, and it can be collected through an exhaust gas heat exchanger and brought to the ORC unit using steam, pressurised water or thermal oil. [...]

The ORC layout is flexible and the unit can also be installed as a retrofit where it is possible to adapt the layout of the machinery to specific constraints by splitting it on different levels, for example.

“This kind of system would be very interesting for bulk carriers, small to medium size oil tankers, ferry boats, small container ships... with payback time between two to five years,” [...]"<


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KIMM's New Stirling Engine Generator to Spur Micro-CHP Tech - World Industrial Reporter

KIMM's New Stirling Engine Generator to Spur Micro-CHP Tech - World Industrial Reporter | Thermal to electric conversion | Scoop.it
KIMM scientists have developed a Stirling engine generator that can produce not only hot water, but also up to 1kilowatt of electricity from a home boiler.
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New thermoelectronic generator: Heat energy efficiently converted to electricity

Through a process known as thermionic conversion, heat energy can be converted into electricity with very high efficiency.

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Thermionic Emission

SPM Physics, Electronics, Thermionic Emission. You can access to the notes and more video at http://spmphysics.onlinetuition.com.my/2013/06/cathode-ray-oscil...
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Can Tetrahedrite Help Generate Cheap Thermoelectric Energy ...

Can Tetrahedrite Help Generate Cheap Thermoelectric Energy ... | Thermal to electric conversion | Scoop.it
A California company, Alphabet Energy, has a high opinion of the characteristics of tetrahedrite and this month announced an agreement with Michigan State University to commercialize the material for thermoelectric systems.
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BaCu2Se2 based compounds as promising thermoelectric materials - Dalton Transactions (RSC Publishing)

In the past few years, many studies have been devoted to the thermoelectric properties of copper selenides and sulfides, and several families of materials have been developed with promising performances.
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The elastic and thermoelectric properties of the Zintl compound Ca5Al2Sb6 under high pressure

The elastic and thermoelectric
properties of Ca5Al2Sb6 under pressure are studied using ab initio calculation and semiclassical Boltzmann theory.
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Frontiers | Thermionic and Photo-Excited Electron Emission for Energy-Conversion Processes | Nanoenergy Technologies and Materials

This article describes advances in thermionic and photoemission materials and applications dating back to the work on thermionic emission by Guthrie in 1873 and the photoelectric effect by Hertz in...
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How a Stirling Engine Works - YouTube

3D animated video that illustrates how a stirling engine works (older version). Updated version with many improvements: http://youtu.be/wGRmcvxB_dk
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Thermoelectric Power Generation Reduces Jet Engine Noise, Powers Mars Curiosity & More - Industry Tap

Thermoelectric Power Generation Reduces Jet Engine Noise, Powers Mars Curiosity & More - Industry Tap | Thermal to electric conversion | Scoop.it
Thermoelectric Power Generation, Mars, Curiosity, TEG
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Low-grade waste heat regenerates ammonia battery

Low-grade waste heat regenerates ammonia battery | Thermal to electric conversion | Scoop.it
An efficient method to harvest low-grade waste heat as electricity may be possible using reversible ammonia batteries, according to Penn State Univ. engineers. Low-grade waste heat is an artifact of many energy-generating methods. In automobiles, waste heat generated in winter is diverted to run the vehicle heating system, but in the summer, that same waste heat must be dissipated to the environment.
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STW and Thermal Energy Partners (TEP) Use Their TwoTechnologies to Create Fresh Water and Clean Energy

STW and Thermal Energy Partners (TEP) Use Their TwoTechnologies to Create Fresh Water and Clean Energy | Thermal to electric conversion | Scoop.it

In the agreement TEP and STW will combine their respective technologies to provide a reliable package of sustainable water & renewable power to municipalities and industrial customers. Delivering water & power together effectively with zero impact to the environment is a welcome relief to those that see water scarcity along with lack of reliable electricity as a large problem in the United States today.

 

Together TEP/STW have the following competitive advantages:

Producing Onsite Fresh Water for Industrial, Agricultural and Municipal applicationsProducing Onsite Renewable Power for Industrial, Agricultural and Municipal applicationsProducing potential Mineral by-products onsite that can be sold to Industrial usersMultiple Sources of Water are compatible with the TEP/STW System: The integrated system can process water from multiple sources including industrial wastewater, high-TDS brackish and high TDS saltwater reverse osmosis concentrate reject, seawater or geothermal water. These combined technologies will be capable of performing far more efficiently than existing technologies such as (Reverse Osmosis or Evaporation Distillation).

 


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Colossal thermomagnetic response in the exotic superconductor URu2Si2

Colossal thermomagnetic response in the exotic superconductor URu2Si2 | Thermal to electric conversion | Scoop.it
The Nernst coefficient is a measure of the transverse thermoelectric effect in a conductor. Superconducting fluctuations magnify this effect but in URu2Si2, the million-fold enhancement suggests that the fluctuations have an exotic origin.
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With Thermionic Generation, the Steam Age Is Looking Sad

With Thermionic Generation, the Steam Age Is Looking Sad | Thermal to electric conversion | Scoop.it
A new-old technology is set to bury turbine-based power generation.
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Korea Develops Electricity-Generating Home Boiler - The Korea Bizwire

Korea Develops Electricity-Generating Home Boiler - The Korea Bizwire | Thermal to electric conversion | Scoop.it
SEOUL, Nov. 29 (Korea Bizwire) – 

Korean scientists have localized Stirling engine technology, generating electricity along with heat from a home boiler.

The Korea Institute of Machinery and Materials (KIMM) announced on November 27 that it had developed a Stirling engine generator capable of producing not only hot water, but also up to 1kilowatt of electricity from a home boiler.

Stirling engines, unlike internal combustion engines that generate power through ignition and explosion, use heat to produce power, and are called clean engines as they emit less noise and toxic gases. The Stirling engine, with a closed-cylinder filled with helium or hydrogen, operates pistons by heating the gases.

The newly developed Stirling engine can produce 1KW of electricity through a two-way linear generator. Existing 1KW-class Stirling generators being produced by a couple of companies are mainly installed with one-way linear generator.


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New generator creates electricity directly from heat - physicsworld.com

New generator creates electricity directly from heat - physicsworld.com | Thermal to electric conversion | Scoop.it
Thermionic device solves the "space-charge problem"

Via Chuck Sherwood, Senior Associate, TeleDimensions, Inc
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