Basic theories behind differential pressure type flowmeters have existed for over a century.. The principle theories among these is Berniulli¡äs theorem for the conservation of energy in
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Khu v c tháp ch ng c t d u t i Nhà máy ự ư ấ ầ ạ
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M t h th ng ộ ệ ố
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M t nhà máy l c d u g m t t c nh ng đ n v ộ ọ ầ ồ ấ ả ữ ơ ị
này
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Băng chuy n clinker nhà máy xi măng Phúc S n _ ề ơ
H i phòng ả
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Công ty Lilama 45.1 l p thi t b truy n ắ ế ị ề nhi t Nhà máy L c d u Dung Qu t ệ ọ ầ ấ
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Thi t b truy n nhi t ng l ng ng ế ị ề ệ ố ồ ố (Double – Pipe Heat Exchanger)
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chùm
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Thi t b trao đ i nhi t ng chùm ế ị ổ ệ ố
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Tòan c nh m t nhà máy ả ộ
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V-cone Flowmeter_KVCF
Trang 21• The V-cone is a differential pressure type flowmeter Basic theories behind differential pressure type flowmeters have existed for over a century The principle theories among these is Berniulli¡äs theorem for the conservation of energy in a closed pipe This states that for
a constant flow, the pressure in a pipe is inversely proportional to the square of the velocity in the pipe Simply, the pressure
decreases as the velocity increases For instance, as the fluid
spproaches the V-cone meter, it will have the pressure of P1 As the fluid velocity increases at the constricted area of the V-cone, the
pressure drop to P2, as show figure right
¡¡¡¡Both P1 and P2 are measured at the V-cone tapes using a
variety of differential pressure transducers The DP created by a cone will increase and decrease exponentially with the velocity As the constriction takes up more of the pipe cross sectional area, more
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