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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The Abbot silver-disk pyrheliometer (with one plate) (eBook, ) 
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. Their response to changing radiation levels is essentially instantaneous and is linear with radiation.
It is po [ 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 pyrheilometer with clouds and atmospheric water vapor.
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Pynmomelers are usually calibrated against standard pyrheliometers, A standard method has been set forth in the Annals of the International Geophysical Year IGY. There is evidence that the calibration of pyranometers changes if the instrument is inclined to the horizontal.
The Silencer March 16th, A geothermal silencer is like a separator operating at atmospheric pressure. 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.
PYRHELIOMETERS AND PYRHELIOMETRIC SCALES | Everything about solar energy
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Write a review Rate this item: Other Growth Functions March 17th, The logistic growth function is no doubt far from being a perfect approximation to the growth of the [ You already recently rated this item. The side exposed to radiation is blackened, and the bulb of a precision mercury thermometer is inserted in a hole in the side of the disc and is in good thermal contact with the disc.
Population Growth March 17th, To describe population growth, we adopt the linear form used by Lotka and Volterra in their original [ The detectors for these instruments must have a response independent of wavelength of radiation over the solar energy spectrum.
Linked Data More info about Linked Data. Cancel Forgot your password? Find a copy in the library Finding libraries that hold this item Citations are based on reference standards. 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.
Direct comparison of the precision Eppley and field instruments can be made to determine the calibration constant of the field instruments. The quantity of alcohol condensed is a measure Of integrated solar energy on the spherical receiver. The silver disc is suspended on wires at the end of a collimating tube, which pyrheliomter later models has dimensions such that 0.
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Much of the available radiation data prior to is probably not this good, largely because of infrequent calibration and in some instances because of inadequate integration procedures. Operational or field instruments arc pyrhelometer against secondary standards and are the source of most of the data on which solar process engineering designs must be based.
Pyrheliometer, Silver Disk
Government publication, National government publication, Internet resource Document Type: It is also possible, as described by Norristo calibrate pyranometers against a secondary standard pyranometer such as the Eppjey precision pyranometlr. The Abbot silver-disk pyrheliometer with one plate Author: With one strip shaded and one strip exposed to radiation, a current is passed through the shaded strip to heat It to the same temperature as the exposed strip.
This is usually done by means of a shading ring, as shown in Figure 2.
When there is no difference in temperature, the electrical energy to the shaded strip must equal the solar radiation absorbed by the exposed strip. English View all editions and formats.