how do i calculate actual mass flow through a compressor without flowmeters?

[scubasteve4sq]

Even if you are located in Florida, your optimum condensing pressure is below 100 psig. Definitely, to achieve this optimum you should overcome several barriers but every barrier has a solution.

That is just unrealistic for a plant of this size, age, and location. We run a wet bulb head pressure in the warm months, and in the cold months we run at 125 psi. If we go below 125 we cannot feed liquid to the plant, remember we have thousands of feet of piping to get to load units, and those load units operate at 38-45 psi suction, there is a limit to what you can achieve with so small a pressure differential, and line loss on the way to the unit. you are probably used to two stage plants that run a much higher psid between suction and head pressure.