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    Pressure Drop in Solar Power Plant Chimneys

    Source: Journal of Solar Energy Engineering:;2003:;volume( 125 ):;issue: 002::page 165
    Author:
    Theodor W. von Backström
    ,
    Andreas Bernhardt
    ,
    Anthony J. Gannon
    DOI: 10.1115/1.1564077
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The paper investigates flow through a representative tall solar chimney with internal bracing wheels. It presents experimental data measured in a 0.63-m-dia model chimney with and without seven bracing wheels. The bracing wheels each had a rim protruding into the chimney and 12 spokes, each spoke consisting of a pair of rectangular section bars. The investigation determined coefficients of wall friction, bracing wheel loss, and exit kinetic energy in a model chimney, for both ideal non-swirling uniform flow and for swirling distorted flow. A fan at one end of the chimney model either sucked or blew the flow through it. The flow entering the chimney through the fan and its diffuser simulated the flow leaving the turbine at the bottom of the chimney. The swirling distorted flow increased the total pressure drop by about 28%, representing 4.7% of the turbine pressure drop. The pressure drop across the bracing wheels exceeded the frictional pressure drop by far. Designers of tall, thin-walled chimneys should take care to minimize the number of bracing wheels, reduce their rim width as much as possible, and investigate the feasibility of streamlining their spoke sections. If at all structurally possible, the top bracing wheel should be far enough from the chimney exit to allow the spoke wakes to decay and the separated flow to re-attach to the chimney wall downstream of the rims before the flow leaves the chimney, to reduce the exit kinetic energy loss.
    keyword(s): Flow (Dynamics) , Friction , Drag (Fluid dynamics) , Bracing (Construction) , Pressure drop , Wheels , Kinetic energy , Reynolds number , Thickness , Pressure , Swirling flow , Solar power stations , Turbines AND Wakes ,
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      Pressure Drop in Solar Power Plant Chimneys

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    http://yetl.yabesh.ir/yetl1/handle/yetl/129064
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    contributor authorTheodor W. von Backström
    contributor authorAndreas Bernhardt
    contributor authorAnthony J. Gannon
    date accessioned2017-05-09T00:11:22Z
    date available2017-05-09T00:11:22Z
    date copyrightMay, 2003
    date issued2003
    identifier issn0199-6231
    identifier otherJSEEDO-28336#165_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/129064
    description abstractThe paper investigates flow through a representative tall solar chimney with internal bracing wheels. It presents experimental data measured in a 0.63-m-dia model chimney with and without seven bracing wheels. The bracing wheels each had a rim protruding into the chimney and 12 spokes, each spoke consisting of a pair of rectangular section bars. The investigation determined coefficients of wall friction, bracing wheel loss, and exit kinetic energy in a model chimney, for both ideal non-swirling uniform flow and for swirling distorted flow. A fan at one end of the chimney model either sucked or blew the flow through it. The flow entering the chimney through the fan and its diffuser simulated the flow leaving the turbine at the bottom of the chimney. The swirling distorted flow increased the total pressure drop by about 28%, representing 4.7% of the turbine pressure drop. The pressure drop across the bracing wheels exceeded the frictional pressure drop by far. Designers of tall, thin-walled chimneys should take care to minimize the number of bracing wheels, reduce their rim width as much as possible, and investigate the feasibility of streamlining their spoke sections. If at all structurally possible, the top bracing wheel should be far enough from the chimney exit to allow the spoke wakes to decay and the separated flow to re-attach to the chimney wall downstream of the rims before the flow leaves the chimney, to reduce the exit kinetic energy loss.
    publisherThe American Society of Mechanical Engineers (ASME)
    titlePressure Drop in Solar Power Plant Chimneys
    typeJournal Paper
    journal volume125
    journal issue2
    journal titleJournal of Solar Energy Engineering
    identifier doi10.1115/1.1564077
    journal fristpage165
    journal lastpage169
    identifier eissn1528-8986
    keywordsFlow (Dynamics)
    keywordsFriction
    keywordsDrag (Fluid dynamics)
    keywordsBracing (Construction)
    keywordsPressure drop
    keywordsWheels
    keywordsKinetic energy
    keywordsReynolds number
    keywordsThickness
    keywordsPressure
    keywordsSwirling flow
    keywordsSolar power stations
    keywordsTurbines AND Wakes
    treeJournal of Solar Energy Engineering:;2003:;volume( 125 ):;issue: 002
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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