We are able to make some estimations about how much oil we can produce with the current prototype. First of all we look at the amount of oil that we can produce per day. Dr. Udaya estimates that the prototype is able to distillate 6 batches per day. Assuming the oil yield is 2 w% (like in the lab experiments) and the density of lemongrass oil is 920 kg/m3 the production of lemongrass oil per day can be seen in the figure below.
Assuming that there is full production for 200 days a year, the total oil production becomes 260 litres per year.