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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Write a review Rate this item: In this instrument the assembly of copper diaphragms and case has very large thermal capacity, orders of magnitude more than the hot junctions. You may have already requested this item. The silver disc is suspended on wires at the end of a collimating tube, which in later models has dimensions such that 0.

The Abbot silver-disk pyrheliometer (with one plate)

Abbt type of pyranometer is based on photovoltaic solar ceil detectors. The first scale, based on measurements with the Angstrom instrument, was established m the Angstrom scale ofor AS The detector is at the end of the collimating tube, which contains several diaphragms and is blackened on the inside. Other pyrheliometers were designed by Molt-Gorczynski, Yaaish- evskiy, and Michclson.

Your rating has been recorded. Photovoltaic detectors have additional characteristics of interest.

The Abbot silver-disk pyrheliometer – Loyal Blaine Aldrich – Google Books

A pyranometer or pyrheiiometer produces a voltage from the thermopile detectors that is a function of the incident radiation. SS13 is very close to WRR. You may send this item to up to five recipients.

Operational or field instruments arc calibrated against secondary standards and are the source of most of the pyreliometer on which solar process engineering designs must be based.

The name field is required. Similar Items Related Subjects: See Stewart et ai. The Angstrom instrument serves, in principle, as an absolute or primary standard. Tire main disadvantage of photovoltaic detectors is their spectrally selective response.


However, it is importan [ Logistic Growth March 16th, The starting point for describing the evolution of a renewable resource stock is the logistic growth [ Finding libraries that hold this item Some features of WorldCat will not be available. Much of abot available radiation data prior to is probably not this good, largely because of infrequent calibration and in some instances because of inadequate integration procedures.

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. 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.

Other Growth Functions March 17th, The logistic growth function is no doubt far from being a perfect approximation to the growth of the [ Details Additional Physical Format: 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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Solar radiation is lyrheliometer by equating the electrical energy to the product of incident solar radiation, strip area, and absorptance. Would you also like to submit a review for this item?

It is necessary to use a potentiometer to detect and record this output. It is po [ Please re-enter recipient e-mail address es. Your request to send this item has been completed. Thus any point on the detector sees an aperture angle of 5.

The Ll-COR instrument is fitted with an acrylic diffuser that substantially removes the dependence of response on the angle of incidence of the radiation. More like this Similar Items. Data from these instruments are generally not as accurate as that from thermopile-type pyranometers.


Advanced Search Find a Library. 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 [ Citations are based on reference standards.


The sphere is connected to a calibrated condenser receiver tube. Simulation of Easter Island March 17th, Perhaps the most revealing method of analysis of this dynamic system is through simulation. pyrehliometer

Their response to changing radiation levels is essentially instantaneous and is linear with radiation. Please enter recipient e-mail address es.

The story is a very sa [ This is usually done by means of a shading ring, as shown in Figure 2. You may use these HTML tags and attributes: Cancel Siilver your password? The other secondary standard of particular importance is the Pydheliometer compensation pyrheliometer, first constructed by K. The E-mail Address es field is required.

The design was modified by Abbot in to abbit the use of two thermally identical chambers, dividing the cooling water between them and beating one chamber electrically while the solver 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 corrections are based on assumptions of the distribution of diffuse radiation over the sky and typically are factors of 1. Your list has reached the maximum number of items.

Instalments for measuring total beam plus diffuse radiation are referred to as pyranom- eters, and it is from these instruments that most of the available data on solar radiation are obtained.

Last modified: April 29, 2020