Problem
Feedwater TDS is 120 ppm and permissible boiler-water TDS is 3,000 ppm. Steam generation is 20 t/h.
Formula
B=S×Cf/(Cb−Cf)
Solution
B=20×120/(3000−120).
Answer
0.833 t/h
Engineering check
Verify units, magnitude, assumptions and physical meaning before accepting the result.