CH2
Chapter 2 · Pumps, fans and compressors
Tutorials 2.1, 2.2 and 2.3 of the booklet, then practice linked to Lab II and extra practice written for this site.
8 exercises
- 01Application of the affinity lawsNew speed, flow, head and power of a pump after a flow reduction, and the annual saving. · 6 questionsTD 2.1Not started
- 02Analysis of electromechanical starter schematicsThe DOL and the automatic open-transition star-delta starter: seal-in, conditions, stopping, sequence, interlocks. · 5 questionsTD 2.2Not started
- 03Pressure booster: P&ID and control loopA constant-pressure booster: the head it represents, the instruments it needs, and how the loop reacts to demand. · 5 questionsTD 2.3Not started
- 04Pump operating pointWhere the pump curve meets a throttled system curve, and the power it takes. · 3 questionsLab IINot started
- 05Throttling or speed control?The Lab II comparison with your own pump: power, speed and energy saved per year. · 4 questionsLab IINot started
- 06Star-delta and autotransformer startingStarting current and torque at reduced voltage, and the autotransformer tap a load needs. · 4 questionsExtra practiceNot started
- 07Soft starterRMS voltage from the firing angle, and the torque and current a reduced voltage gives. · 4 questionsExtra practiceNot started
- 08V/f driveOutput voltage, speed at constant slip speed, and maximum torque in field weakening. · 3 questionsExtra practiceNot started