The Abbot silver-disk pyrheliometer. Subjects: Pyrheliometer. Note: At head of title: Hodgkins Fund. Publication Physical Description: 11 p. illus. 24 cm. Get this from a library! The Abbot silver-disk pyrheliometer (with one plate). [Loyal Blaine Aldrich; Smithsonian Institution. Hodgkins Fund.]. Subject: 14 SOLAR ENERGY; PYRHELIOMETERS; DESIGN; MEASURING INSTRUMENTS; TELESCOPES * — Solar Energy– Resources & Availability.

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Another type of pyranometer is based on photovoltaic solar ceil detectors.

Silver-disk pyrheliometer

It is also possible, as described by Norristo calibrate pyranometers against a secondary standard pyranometer such as the Eppjey precision pyranometlr. It is difficult to generalize from the few data available, but it appears that thin clouds or haze can affect the angular distribution of rotation within the field of view of standard pyrheliomeiers.

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The reason for this appears to be changes in the convection patterns inside the gloss dome, which changes the manner in which heal is transferred from Hie hot junctions wbbot the thermopiles to the cover and other parts of the instrument. After a determination is made, the position of the shutter is reversed to.

Please re-enter recipient e-mail address es. Please verify that you are not a robot. Solar radiation is determined by equating the electrical energy to the product of incident solar radiation, strip area, and absorptance. The Silencer March 16th, A geothermal silencer is like a separator operating at atmospheric pressure. Find more information about: Solar energy, helio systems, solar panels, collectors, equipment for water heating and space heating using solar energy and everything about solar energy.

Bach strip can be electrically heated, and each is fitted with a thermocouple. The aperture angle of the instrument is 5. Standard and secondary standard solar radiation instruments are pyrheliometers. If the spectral distribution of incident radiation was fixed, a calibration could be established that would remain constant; however, there are some variations in spectral distribution2 with clouds and atmospheric water vapor.


Open Access, Property Rights, and Harvesting Behavior March 17th, The natural growth of the forest stock provides part of the story in characterizing the evolution of [ Allow this favorite library to be seen by others Keep this favorite library private.

Everything about solar energy Solar energy, helio systems, solar panels, collectors, equipment for water heating and space heating using solar energy and everything about solar energy. Citations are based on reference standards. Finding libraries that hold this item The design was modified by Abbot in to include the use of two thermally identical chambers, dividing the cooling water between them and beating one chamber electrically while the other is heated by solar radiation; when the instrument is adjusted so as to make the heat produced in the two chambers identical, the electrical power input is a measure of the solar energy absorbed.

The other secondary standard of particular importance is the AngslrSm compensation pyrheliometer, first constructed by K. However, formatting rules can vary widely between applications and fields of interest or pyrheliometfr.

Home About Help Search. Adapted from Stewart el at.

Catalog Record: The Abbot silver-disk pyrheliometer | Hathi Trust Digital Library

Privacy Policy Terms and Conditions. The dimensions of the collimating systems are such that the detectors are exposed to radiation from the sun and from a portion of the sky around the sun.

Data on the total energy received pyreliometer a body, as represented by the sphere, are of interest in some biological processes. Data from these instruments are generally not as accurate as silber from thermopile-type pyranometers. English View all editions and formats. Population Growth March 17th, To describe population growth, we adopt the linear form used by Lotka and Volterra in their original [ An example of shade ring correction factors, to illustrate their trends and magnitudes, is shown in Figure 2.



Government publication, National government publication, Internet resource Document Type: Direct comparison of the precision Eppley and field instruments can be made to determine the calibration constant of the field instruments. These instruments have the advantage of being entirely spring driven and thus require no electrical energy.

Aldrich, Loyal Blaine, The ring is used to allow continuous recording of diffuse radiation without the necessity of continuous positioning of smaller shading devices; adjustments need to be made for changing declination only and can be made every few days. The Abbot and AngstrSm instruments arc used as secondary standards for calibration of other instruments, and there Is a pyrheliometrlc scale associated with each of them.

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The name field is required. This is usually done by means of a shading ring, as shown in Figure 2. Write a review Rate this item: The detector assembly was placed in a nearly spherical glass bulb, which has a transmittance greater than 0.

Details Additional Physical Format: The detector is at the end of the collimating tube, which contains several diaphragms and is blackened on the inside. It is po [ Advanced Search Silvee a Library. Similar Items Related Subjects: You may use these HTML tags and attributes: Preview this item Preview this item.

The detectors for these instruments must have a response independent of wavelength of radiation over the solar energy spectrum.

Pyrheliometer, Silver Disk

Thus any point on the detector sees an aperture angle of 5. Measurements of solar radiation on inclined planes are important in determining the input to solar collectors.

Adapted from Couhon. English View all editions and formats Rating: