• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
METO 621
METO 621

1 7 – Electrochemical conversion 1. Introduction Some successive
1 7 – Electrochemical conversion 1. Introduction Some successive

Chemistry: Dr. Wilhelm & Ms. Greendyk
Chemistry: Dr. Wilhelm & Ms. Greendyk

... o High heat capacity- takes more energy to heat up and can store more thermal energy.  The high heat capacity of water (4.18J/g C) is very important to our weather and environment. Because oceans are so large they can store a lot of energy. They help to moderate temperature changes. ...
Trichromatic Theory of Color Vision
Trichromatic Theory of Color Vision

... intensities of any three other lights (2 is not enough; 4 is more than enough & produces non-unique matches) ...
Physics Topics and Objective
Physics Topics and Objective

(Maximum 6 pages, including figures, tables and references, please
(Maximum 6 pages, including figures, tables and references, please

File
File

PP_FEA - LAS
PP_FEA - LAS

... Computation of heat load can be carried through in two ways: 1) Use of analytical approximations 2) Numerical computation by the use of ray tracing codes. LASCAD does not have its own ray tracing code, but has interfaces to the well known and reliable codes ZEMAX and TracePro. ...
Introducing Photochemistry
Introducing Photochemistry

λ - Chemistry 7
λ - Chemistry 7

... MYSTERY #3: Narrow bands of colors of light are emitted when gases are excited by high voltage. The colors are characteristic and reproducible for different elements. The light generated by the ...
Temperature and energy
Temperature and energy

... • As the warm fluids cool, they contract and get heavier (denser) and sink. • As fluids sink they are warmed up again by the heat source. • The rising and sinking water forms a convection current. ...
12 Limits to the Second Law of Thermodynamics
12 Limits to the Second Law of Thermodynamics

... and transient behavior of the quantum heat engines (QHE), e.g lasers, photovoltaic cells, photosynthetic reaction centers, and nanoplasmonic devices. We showed that the maximum power of a QHE that converts incoherent thermal energy into coherent cavity photons could be enhanced by manipulating quant ...
近代科學發展
近代科學發展

246_Physics_and_Technology_in_Society_I_Gr_11-12
246_Physics_and_Technology_in_Society_I_Gr_11-12

... Gravitational potential energy Elastic potential energy Linear kinetic energy Rotational kinetic energy The law of conservation of energy Capacitors and inductor ...
Thermo 2 - WordPress.com
Thermo 2 - WordPress.com

... the height changes from July (ave. 25 °C) to January (ave. 2 °C). 4. The density of water at 4 °C is 1000 kg/m³. What is water’s density at 94 °C? 5. Absolute zero is what temperature on the Fahrenheit scale? 6. At (a) atmospheric pressure, in what phases can CO2 exist? (b) For what range of pressur ...
Components of Optical Instruments
Components of Optical Instruments

Slide 1
Slide 1

... • The emission spectrum of the hydrogen atom is the simplest emission spectrum, because having only one electron, there is none of the electron-electron repulsion which causes the principal energy levels to split into different sub-levels. • When a potential difference is applied across hydrogen gas ...
Presentation
Presentation

Chap. 13 -- Atomic P..
Chap. 13 -- Atomic P..

Final Study Guide - Dublin City Schools
Final Study Guide - Dublin City Schools

... Schematic Diagram- a diagram used to show a circuit on paper. *A complete circuit is a series of wires and electrical components that form a closed path through which electricity flows. *Closed circuits allow electricity to flow, open circuits do not. *Moving electric charges create a magnetic field ...
Chapter 6 Notes
Chapter 6 Notes

... temperature of a body of water caused by adding warmer water. Some electric power plants and factories that use water to cool machinery produce hot water as a by-product. If the hot water is placed back into its source, it will raise the temperature of the water nearby. ...
9.4.2 Photoelectric Effect
9.4.2 Photoelectric Effect

Radiation in a Medium
Radiation in a Medium

Energy changes(download)
Energy changes(download)

...  Light bulb • (electrical → light) ...
Radiation - Electromagnetic Waves (EMR): wave consisting of
Radiation - Electromagnetic Waves (EMR): wave consisting of

< 1 2 3 4 5 6 >

Thermophotovoltaic

Thermophotovoltaic (TPV) energy conversion is a direct conversion process from heat to electricity via photons. A basic thermophotovoltaic system consists of a thermal emitter and a photovoltaic diode cell.The temperature of the thermal emitter varies between different systems from about 900 °C to about 1300 °C, although in principle TPV devices can extract energy from any emitter with temperature elevated above that of the photovoltaic device (forming an optical heat engine). The emitter can be a piece of solid material or a specially engineered structure.Thermal emission is the spontaneous emission of photons due to thermal motion of charges in the material. For normal TPV temperatures, this radiation is mostly at near infrared and infrared frequencies. The photovoltaic diodes can absorb some of these radiated photons and convert them into free charge carriers, that is electricity.Thermophotovoltaic systems have few, if any, moving parts and are therefore very quiet and require low maintenance. These properties make thermophotovoltaic systems suitable for remote-site and portable electricity-generating applications. Their efficiency-cost properties, however, are often rather poor compared to other electricity-generating technologies. Current research in the area aims at increasing the system efficiencies while keeping the system cost low. In the design of a TPV system, it is usually desired to match the optical properties of thermal emission (wavelength, polarization, direction) with the most efficient conversion characteristics of the photovoltaic cell, since unconverted thermal emission is a major source of inefficiency. Most groups focus on gallium antimonide (GaSb) cells. Germanium (Ge) is also suitable. Much research and development in TPVs therefore concerns methods for controlling the emitter's properties.TPV cells have often been proposed as auxiliary power conversion devices for regeneration of lost heat in other power generation systems, such as steam turbine systems or solar cells. A prototype TPV hybrid car was even built. The ""Viking 29"" (TPV) powered automobile, designed and built by the Vehicle Research Institute (VRI) at Western Washington University.TPV research is a very active area. Among others, the University of Houston TPV Radioisotope Power Conversion Technology development effort is aiming at combining thermophotovoltaic cell concurrently with thermocouples to provide a 3 to 4-fold improvement in system efficiency over current radioisotope thermoelectric generators.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report