🗊Презентация Solar Radiation

Категория: Образование
Нажмите для полного просмотра!
Solar Radiation , слайд №1Solar Radiation , слайд №2Solar Radiation , слайд №3Solar Radiation , слайд №4Solar Radiation , слайд №5Solar Radiation , слайд №6Solar Radiation , слайд №7Solar Radiation , слайд №8Solar Radiation , слайд №9Solar Radiation , слайд №10Solar Radiation , слайд №11Solar Radiation , слайд №12Solar Radiation , слайд №13Solar Radiation , слайд №14Solar Radiation , слайд №15Solar Radiation , слайд №16Solar Radiation , слайд №17Solar Radiation , слайд №18Solar Radiation , слайд №19Solar Radiation , слайд №20Solar Radiation , слайд №21Solar Radiation , слайд №22Solar Radiation , слайд №23Solar Radiation , слайд №24Solar Radiation , слайд №25Solar Radiation , слайд №26Solar Radiation , слайд №27Solar Radiation , слайд №28
Скачать
Вы можете ознакомиться и скачать презентацию на тему Solar Radiation . Доклад-сообщение содержит 28 слайдов. Презентации для любого класса можно скачать бесплатно. Если материал и наш сайт презентаций Mypresentation Вам понравились – поделитесь им с друзьями с помощью социальных кнопок и добавьте в закладки в своем браузере.

Слайды и текст этой презентации

Слайд 1


Solar Radiation The energy emitted by the Sun is called SOLAR RADIATION. It is the only source of energy for the Earth. Other sources: Earth’s surface – 5000 times less, Stars – 30.000.000 times less. When arriving to Earth, the larger part of the solar radiation (SR) transforms to heat energy, and a small portion of it to electric energy (upper atmosphere). area receives annually of energy
Описание слайда:
Solar Radiation The energy emitted by the Sun is called SOLAR RADIATION. It is the only source of energy for the Earth. Other sources: Earth’s surface – 5000 times less, Stars – 30.000.000 times less. When arriving to Earth, the larger part of the solar radiation (SR) transforms to heat energy, and a small portion of it to electric energy (upper atmosphere). area receives annually of energy

Слайд 2


Solar Radiation , слайд №2
Описание слайда:

Слайд 3


Energetic state of a body Any body the temperature of which is above 0 K radiates energy. Equilibrium state Non-equilibrium state
Описание слайда:
Energetic state of a body Any body the temperature of which is above 0 K radiates energy. Equilibrium state Non-equilibrium state

Слайд 4


Units and notions The unit of radiant energy is Joule (J) or kJ, mJ, hJ. The basic characteristics of radiation is FLUX of RADIANT ENERGY. Amount of energy emitted (or passing) through the unit of area in a unit of time is termed SURFACE DENSITY of RADIATION FLUX or RADIOSITY. It is also called simply Radiant flux or Flux of radiation. Units:
Описание слайда:
Units and notions The unit of radiant energy is Joule (J) or kJ, mJ, hJ. The basic characteristics of radiation is FLUX of RADIANT ENERGY. Amount of energy emitted (or passing) through the unit of area in a unit of time is termed SURFACE DENSITY of RADIATION FLUX or RADIOSITY. It is also called simply Radiant flux or Flux of radiation. Units:

Слайд 5


Wave nature of the radiant flux Radiant energy spreads in form of waves of different length. Distribution of energy in wavelength is very important characteristics. Let’s take wavelength interval from λ to dλ i.e. dλ. Amount of energy emitted trough the body surface ds is proportional to ds and dλ denotes monochromatic (homogeneous) flux of radiation. It represents the quantity to characterize the wavelength around λ. It is also called spectral density of radiation flux or emitting capability of the body or simply emittance.
Описание слайда:
Wave nature of the radiant flux Radiant energy spreads in form of waves of different length. Distribution of energy in wavelength is very important characteristics. Let’s take wavelength interval from λ to dλ i.e. dλ. Amount of energy emitted trough the body surface ds is proportional to ds and dλ denotes monochromatic (homogeneous) flux of radiation. It represents the quantity to characterize the wavelength around λ. It is also called spectral density of radiation flux or emitting capability of the body or simply emittance.

Слайд 6


Solar Radiation , слайд №6
Описание слайда:

Слайд 7


Absorption, reflection, transmission As a monochromatic flux of radiation falls on a body and passing through it, the flux is partly absorbed, partly reflected, and the remaining part is allowed for transmission. Absorption capability of the body (relative coefficient of absorption). Reflection capability of the body (albedo). Relative coefficient of transmission. These coefficients depend on wavelength and properties of the body (Selectivity of the body)
Описание слайда:
Absorption, reflection, transmission As a monochromatic flux of radiation falls on a body and passing through it, the flux is partly absorbed, partly reflected, and the remaining part is allowed for transmission. Absorption capability of the body (relative coefficient of absorption). Reflection capability of the body (albedo). Relative coefficient of transmission. These coefficients depend on wavelength and properties of the body (Selectivity of the body)

Слайд 8


Special properties of bodies Absolutely Black body (Bb)
Описание слайда:
Special properties of bodies Absolutely Black body (Bb)

Слайд 9


Transmission function for the atmosphere The atmosphere is a transparent body. Meteorologists usually deal with some layers of it. Monochromatic entering flux Outgoing flux
Описание слайда:
Transmission function for the atmosphere The atmosphere is a transparent body. Meteorologists usually deal with some layers of it. Monochromatic entering flux Outgoing flux

Слайд 10


Kirchhoff’s law There is a good relation between absorption and emittance of a body. The ratio Em/Ab does not depend on the nature of the body. It is the same function B(λ,T) for every of bodies. That’s Kirchhoff’s law. For a Bb In the nature there are no absolutely black bodies. Any real body emits and absorbs less energy of the same wavelength than Bb. However it emits and absorbs energy of the same wavelength. M. Plank’s formula
Описание слайда:
Kirchhoff’s law There is a good relation between absorption and emittance of a body. The ratio Em/Ab does not depend on the nature of the body. It is the same function B(λ,T) for every of bodies. That’s Kirchhoff’s law. For a Bb In the nature there are no absolutely black bodies. Any real body emits and absorbs less energy of the same wavelength than Bb. However it emits and absorbs energy of the same wavelength. M. Plank’s formula

Слайд 11


Gustav Robert Kirchhoff Wilhelm Wien  1824 –1887 Born Königsberg, Kingdom of Prussia He coined the term "black body" radiation in 1862  
Описание слайда:
Gustav Robert Kirchhoff Wilhelm Wien  1824 –1887 Born Königsberg, Kingdom of Prussia He coined the term "black body" radiation in 1862  

Слайд 12


Max Planck 1858 –1947 Planck was gifted when it came to music. He took singing lessons and played piano, organ and cello(Violoncello ), and composed songs and operas. However, instead of music he chose to study physics.
Описание слайда:
Max Planck 1858 –1947 Planck was gifted when it came to music. He took singing lessons and played piano, organ and cello(Violoncello ), and composed songs and operas. However, instead of music he chose to study physics.

Слайд 13


1-st Wien’s law (Displacement law) Distribution of energy in an absolute Bb radiation spectrum is not homogeneous. It depends on the body temperature. Suppose: There is one wavelength (λm) where radiant energy is maximal. The λm value depends on the body temperature. The lower the temperature, the larger the λm value.
Описание слайда:
1-st Wien’s law (Displacement law) Distribution of energy in an absolute Bb radiation spectrum is not homogeneous. It depends on the body temperature. Suppose: There is one wavelength (λm) where radiant energy is maximal. The λm value depends on the body temperature. The lower the temperature, the larger the λm value.

Слайд 14


Practical application of the 1 Wien’s law?
Описание слайда:
Practical application of the 1 Wien’s law?

Слайд 15


Much of a person's energy is radiated away in the form of infrared light. Some materials are transparent in the infrared, while opaque to visible light, as is the plastic bag in this infrared image (bottom). Other materials are transparent to visible light, while opaque or reflective in the infrared, noticeable by darkness of the man's glasses.
Описание слайда:
Much of a person's energy is radiated away in the form of infrared light. Some materials are transparent in the infrared, while opaque to visible light, as is the plastic bag in this infrared image (bottom). Other materials are transparent to visible light, while opaque or reflective in the infrared, noticeable by darkness of the man's glasses.

Слайд 16


Temperatures of flames by appearance The temperature of flames with carbon particles emitting light can be assessed by their color: Red Just visible: 525 °C (980 °F) Dull: 700 °C (1,300 °F) Cherry, dull: 800 °C (1,500 °F) Cherry, full: 900 °C (1,700 °F) Cherry, clear: 1,000 °C (1,800 °F) Orange Deep: 1,100 °C (2,000 °F) Clear: 1,200 °C (2,200 °F) White Whitish: 1,300 °C (2,400 °F) Bright: 1,400 °C (2,600 °F) Dazzling: 1,500 °C (2,700 °F) http://en.wikipedia.org/wiki/Fire#Typical_temperatures_of_fires_and_flames
Описание слайда:
Temperatures of flames by appearance The temperature of flames with carbon particles emitting light can be assessed by their color: Red Just visible: 525 °C (980 °F) Dull: 700 °C (1,300 °F) Cherry, dull: 800 °C (1,500 °F) Cherry, full: 900 °C (1,700 °F) Cherry, clear: 1,000 °C (1,800 °F) Orange Deep: 1,100 °C (2,000 °F) Clear: 1,200 °C (2,200 °F) White Whitish: 1,300 °C (2,400 °F) Bright: 1,400 °C (2,600 °F) Dazzling: 1,500 °C (2,700 °F) http://en.wikipedia.org/wiki/Fire#Typical_temperatures_of_fires_and_flames

Слайд 17


Some interesting results gained from the 1-st Wien’s law
Описание слайда:
Some interesting results gained from the 1-st Wien’s law

Слайд 18


The total flux and 2-nd Wien’s law The total flux of Bb radiation includes energy of all wavelengths emitted by the body. After integration 2-nd Wien’s law
Описание слайда:
The total flux and 2-nd Wien’s law The total flux of Bb radiation includes energy of all wavelengths emitted by the body. After integration 2-nd Wien’s law

Слайд 19


Grey body Since in the nature there are no absolutely black bodies, we may call all of them grey bodies. The grey body is a body the absorption capability of which is the same for every wavelength. Radiation flux of any grey body can be presented as;
Описание слайда:
Grey body Since in the nature there are no absolutely black bodies, we may call all of them grey bodies. The grey body is a body the absorption capability of which is the same for every wavelength. Radiation flux of any grey body can be presented as;

Слайд 20


Extinction and Bouguer’s law Notion of extinction The term extinction means weakening of the radiation energy as its flux passing through a body (or atmospheric layer). Extinction=absorption + diffusion Bouguer’s law holds: the flux of radiation is extinguished proportionally to its intensity (Fλ), density of the medium it passes through (ρ), and the passing distance (dl). is mass extinction index, its dimension is
Описание слайда:
Extinction and Bouguer’s law Notion of extinction The term extinction means weakening of the radiation energy as its flux passing through a body (or atmospheric layer). Extinction=absorption + diffusion Bouguer’s law holds: the flux of radiation is extinguished proportionally to its intensity (Fλ), density of the medium it passes through (ρ), and the passing distance (dl). is mass extinction index, its dimension is

Слайд 21


Solar Radiation , слайд №21
Описание слайда:

Слайд 22


Sum up of the radiation laws
Описание слайда:
Sum up of the radiation laws

Слайд 23


Radiant energy brightness
Описание слайда:
Radiant energy brightness

Слайд 24


Solar Radiation , слайд №24
Описание слайда:

Слайд 25


Brightness - emittance relation in isotropic field of radiation
Описание слайда:
Brightness - emittance relation in isotropic field of radiation

Слайд 26


Definitions
Описание слайда:
Definitions

Слайд 27


Solar Radiation , слайд №27
Описание слайда:

Слайд 28


Solar Radiation , слайд №28
Описание слайда:

Скачать

Теги Solar Radiation
Похожие презентации
Mypresentation.ru
Загрузить презентацию