A coolant (specific gravity 1 2) is pumped through a heat exchanger and control valve at a nominal (desired) flow rate of q d 0 6 m 3 min The total pressure drop over this heat exchanger system (including piping and fittings) is constant at 450 kPa The pressure drop over the system without the control valve, P s , is proportional to the flow rate squared Its nominal value at the desired flow rate is P sd 200 kPa The control valve is to be designed so that the nominal flow rate is 2 3 of the maximum flow rate when the valve is completely open Based on this information, what value of the valve coefficient C v should be specified

Question: A coolant (specific gravity = 1.2) is pumped through a heat exchanger and control valve at a nominal (desired) flow rate of q d =

A coolant (specific gravity = 1.2) is pumped through a heat exchanger and control valve at a nominal (desired) flow rate of q_d= 0.6 m³/min. The total pressure drop over this heat exchanger system (including piping and fittings) is constant at 450 kPa. The pressure drop over the system without the control valve, ΔP_s, is proportional to the flow rate squared. Its nominal value at the desired flow rate is ΔP_sd = 200 kPa. The control valve is to be designed so that the nominal flow rate is 2/3 of the maximum flow rate when the valve is completely open. Based on this information, what value of the valve coefficient C_vshould be specified?

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Starting from Eq 97 The pressure drop in the valve is P v P P s 2 where P s Kq 2 3 Solve for K by pl... View full answer

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