DX CAPACITY

[antony09]

WE NEED TO INCREASE THE CFM TOTAL THROUGH THE COIL OF DX SYSTEM, THE CAPACITY OF THE EQUIPMENT IS 20 TONS, THE NOMINAL FLOW IS 8000 CFM, BUT WE NEED TO GET MORE CAPACITY OF THIS EQUIPMENT, THEREFORE WE INCREASE THE FLOW TO 12,500 CFM, BUT THE PRESSURE OF THE EQUIPMENT ARE WRONG, PER EXAMPLE SUCTION PRESSURE= 60 PSIG AND DISCHARGE PRESSURE = 280 PSIG, I UNDERSTOOD THE CARRYOVER EFECT WHEN WE INCREASE THE FLOW, BUT IN THIS MOMENT WE DONT HAVE THIS PROBLEM, THE PROBLEM IS THAT THE EQUIPMENT DONT INCREASE YOUR CAPACITY, PLEASE IF ANY PEOPLE KNWO WHAT HAPPENING WITH THE REFRIGERANT CIRCUIT, EXLAIN ME.

 

[quark]

First of all, we require the question to be put in a proper manner.

Some Etiquettes

1. Don't use all capital letters. This means shouting.
2. Use fullstops instead of commas for proper understanding of what is written.
3. Clearly define your objective and problem.

Now coming to your problem, you want to have an extra capacity of more than 50% and I didn't come across with such a generous design. If your sensible heat load is more then you will not have problems with carryover obviously. High load on the system does effect the overall pressure in the system.

Regards,

 

[25362]

Besides, using the same HT area, and even the same [δ]T, how do you intend to increase the overall HT by more than 50%?

HT: Heat transfer.

 

[friartuck]

Your compressor will still move the same mass of refrigerant and so the duty will hardly change (perhaps 10% if you were lucky)

You might get more superheat followed by a fairly constant pressure rise across the compressor. The condenser size is also fixed and can only reject a fixed amount so you are stuck with pretty much what you have.

Friar Tuck of Sherwood