In Video 3, Simon discusses the key parameter of specific energy consumption (SEC). Watch the video, then answer the questions that follow.

Video 3 Specific energy consumptionVideo player: Clip%202.mp4

Transcript: https://www.open.edu/openlearncreate/mod/page/view.php?id=162155

Next we're going to calculate power and energy for different situations. For this, you may find it useful to refer to the equation and data sheet (314.8 KB) ('Ctrl click' to open in a new window) included with this course.

Question 4: Referring back to the equations you saw in Section 2, how much power in kW does it take to pump 1,000 m3/h of water at 0.5 bar pressure? View answer

Question 5: How much power is required to produce the above product flow if it represents only half of the feed flow, and the feed flow has to be pumped to 54 bar? View answer

Question 6: What is the specific energy consumption (SEC) in kWh per m3 product for the above? View answer

You've now calculated specific energy consumption (SEC), and noted how it relates to pressure. Now it's time to learn about the parameters which are specific to membrane processes.

You can now move to Section 4 Membrane process parameters