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Author: Burton Percival Fleming
Publisher:
ISBN:
Category : Irrigation
Languages : en
Pages : 254
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Book Description
Author: Burton Percival Fleming
Publisher:
ISBN:
Category : Irrigation
Languages : en
Pages : 254
Get Book Here
Book Description
Author: Burton Percival Fleming
Publisher:
ISBN:
Category : Irrigation
Languages : en
Pages : 256
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Book Description
Author: American Well Works
Publisher:
ISBN:
Category : Irrigation
Languages : en
Pages : 96
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Book Description
Author: Burton P. FLEMING
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Author: Mortimer Reed Lewis
Publisher:
ISBN:
Category : Irrigation
Languages : en
Pages : 72
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Book Description
Author: Bernard Alfred Etcheverry
Publisher:
ISBN:
Category : Irrigation
Languages : en
Pages : 254
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Book Description
Author: Fleming Percival
Publisher: Hardpress Publishing
ISBN: 9781313103138
Category :
Languages : en
Pages : 256
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Book Description
Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.
Author: Augustus Jesse Bowie
Publisher:
ISBN:
Category : Irrigation
Languages : en
Pages : 248
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Book Description
Author: John A. Fazio
Publisher:
ISBN:
Category : Centrifugal pumps
Languages : en
Pages : 128
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Book Description
Centrifugal irrigation pumps discharge fluids at high velocities that must be slowed to minimize energy losses due to friction. Pipe expansions make the transition to larger pipes associated with slower velocities. Expansions convert the upstream velocity head to static head in the downstream pipe. The transition to a larger pipe is commonly an abrupt or single-stage conical pipe expansion. Two-stage conical pipe expansions have been shown to be more efficient and a potential alternative. Four two-stage pipe expansions using standardly available materials were constructed and tested at common irrigation flow rates. These expansions require less space and cost less than optimum two-stage expansions. Pressure change across the pipe expansions were measured. The calculated head loss coefficients were compared to published values of abrupt, single-stage, and optimum two-stage pipe expansions. Head loss coefficients for the 50 - 100 mm and 75 - 150 mm two-stage expansions averaged 0.32 and 0.28 respectively. Loss coefficients for the 100 - 200 mm and 125 - 250 rim two-stage expansions averaged 0.16 and 0.17 respectively. The two-stage expansions operated more efficiently than abrupt and single-stage expansions and were economically practical for many pumping situations. The 50 - 100 mm two-stage expansion was only a slight improvement over a single-stage welding cone expansion. The fitting was economical as electricity prices rose over $0.05/kWh for crops requiring 3000 annual operating hours. The larger fittings became progressively better. The 75 - 150 mm expansion became economically practical at $0.03/kWh when operating more than 1,600 hours. The 100 - 200 mm and 125 - 250 mm two-stage fittings were always practical. Beginning with the 75 - 150 mm size and increasingly with the next two larger sizes, optimum two-stage fittings became economically competitive. Optimum two-stage expansions operated most efficiently, but because of their high cost were only practical for high electricity costs and long irrigation seasons. The three largest two-stage expansions tested are improvements over abrupt or single-stage expansions when constructing a pump discharge. Replacing an existing, less efficient expansion may not be cost effective because the existing fitting cost is lost. While only a small part of an irrigation system, these two-stage expansions can improve system performance with little extra cost and without requiring difficult to obtain components.
Author: Burton Percival Fleming
Publisher: Palala Press
ISBN: 9781358357442
Category :
Languages : en
Pages :
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Book Description
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
