A coolant (specific gravity=1.2) is pumped through aheat exchanger and control valve at a nominal (desired) flowrate of qd=0.6 m3/min. The total pressure drop over this heatex changer system (including piping and fittings) is constant at 450 kPa. The pressure drop over the system without thecontrol valve,ΔPs, is proportional to the flow rate squared. Its nominal value at the desired flow rate is ΔPsd=200 kPa. Thecontrol valve is to be designed so that the nominal flow rate is 2/3 of the maximum flow rate when the valve is complete ly open. Based on this information, what value of the valve coefficient Cv should be specified?

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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A coolant (specific gravity=1.2) is pumped through aheat exchanger and control valve at a nominal (desired) flowrate of qd=0.6 m3/min. The total pressure drop over this heatex changer system (including piping and fittings) is constant at 450 kPa. The pressure drop over the system without thecontrol valve,ΔPs, is proportional to the flow rate squared. Its nominal value at the desired flow rate is ΔPsd=200 kPa. Thecontrol valve is to be designed so that the nominal flow rate is 2/3 of the maximum flow rate when the valve is complete ly open. Based on this information, what value of the valve coefficient Cv should be specified?

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