How to calculate the required flow rate from the total refrigeration capacity is 152720 kilocalories per hour (kcal/h)?
You have to give more information. Which rate: circulating rate or the overfeed rate and at what operating conditions?

You have to respect the circulation rate informed by the manufacturer of the plates.

You should check manufacturer’s literature or read older posts on this topic like:

http://www.refrigeration-engineer.co...p/t-13313.html

Now as to the math with no assurance these are correct numbers, look at it this way:

In one hour you need to extract 152720 kcal and to do that you must circulate 132 litres per 1000 Kcal then you have to circulate (152720 x 132)/1000 = 20159 litres.

As your calculations are in one hour you need 20159 liters/hour.