Explanation Given information: The density of liquid refrigerant 83.31 lbm / ft 3 , the venture diameter at inlet is 6 in and at throat is 2 in , the pressure drop is 7.5 psi and the discharge coefficient is 0.98 . Write the expression for diameter ratio of the venturi meter. β = d D ...... (I) Here, the diameter of the venturi meter is D and the diameter of throat of venture meter is d . Write the expression for throat area. A = π 4 d 2 ....... (II) Write the expression for volume flow rate. V ˙ = A C d 2 ( P 1 − P 2 ) ρ ( 1 − β 4 ) ...... (III) Here, the pressures at pipe of the venturi is P 1 and the pressure at the throat of the venture is P 2 and the discharge coefficient is C d . Calculation: Substitute 6 in for D and 2 in for d in Equation (I). β = 2 in 6 in = 0.33 Substitute 2 in for d in Equation (II). A = π 4 ( 2 in ) 2 = π 4 ( 2 in × 1 ft 12 in ) 2 = 0.1308 ft 2 Substitute 7.5 psi for ( P 1 − P 2 ) , 0.98 for C d , 83.31 lbm / ft 3 for ρ , 0.1308 ft 2 for A and 0.33 for β in Equation (III)

Fluid Mechanics Fundamentals And Applications

3rd Edition

ISBN: 9780073380322

Author: Yunus Cengel, John Cimbala

Publisher: MCGRAW-HILL HIGHER EDUCATION

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Chapter 8, Problem 126EP

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The flow rate of the refrigerant.

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Chapter 8, Problem 125P

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Fluid Mechanics Fundamentals And Applications

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The flow rate of the refrigerant.

Solution Summary: The author explains the flow rate of the refrigerant, the venture diameter at inlet and the pressure drop at throat.

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