Report Red bull(shit) stratos record. in General Chat Posted October 18, 2012 Turns out I can't be arsed to draw a picture but google can provide some useful ones. The reactor is continuously heating water (called primary coolant), this water is pumped into the steam generators. The energy is tranferred from the primary coolant into the steam generator water (called secondary coolant) which is boiled. This reduces the temperature of the primary coolant which is then sent back into the reactor to be heated up again, ready to repreat the process again. The secondary coolant is boiled and turned into steam, it is a high pressure steam. This high pressure steam is transferred to the turbines, where it is forced through spinning them round. The turbines go on to either generate electricity from the motor generators or power the engines from the main gearbox. This process extracts all the useful energy from the steam and leaves low pressure steam. The low pressure steam then flows into the condenser. Cold Sea water is pumped into the condenser and is warmed up when the steam condenses. Warm sea water is then pumped out of the submarine. The steam that has been condensed is then returned to the steam generator to be turned into steam again. Here is the same diagram but for a power station. Notice that the only difference is the cooling tower instead of sea water. No steam is vented from either system. This whole process is described here http://en.wikipedia.org/wiki/Rankine_cycle Wolfy I trust you will now recreate these in crayon for Gemmill as you promised earlier.