Pump Volume Flow and Temperature Rise
If the flow through the pump is reduced by throttling the discharge valve the temperature rise increase. If the flow is reduced to 2 m 3 /h ( m 3 /s), brake power slightly reduced to kW and the pump efficiency reduced to 15% () the temperature rise can be calculated as. dt = ( kW) (1 ) / (( kJ/kg o C) ( m 3 /s) (1000 kg/m 3)) = o C