Recent content by David Gin

Hi all, How would one go about determining the flow(GPM) of a closed loop parallel piping system. I believe this has to do with the pressure intake and outlet of the pump as I have a pump in the mentioned system rated at 4350GPM@50Hz but it is pumping at 4500 GPM at 37Hz, Thank you all for...

That's right, apologies for not being clearer earlier. Is there a correlation/explanation between the amount of air exhausted during this phase that would cause the air dryer to work at a reduced capacity?

That will be during the regeneration phase where heat is removed after the desiccant is heated.

Hi JBA, Appreciate your inputs. How about if the air dryer is not exhausted quickly enough due to the exhaust piping is design smaller than the required specifications, how would it affect the dryer capacity? Thanks,

Heat won't be able to escape during regeneration phase as the desiccant is heated up for re-use.

Hi all, Is there a correlation between an Air Dryer capacity and the exhaust pipe diameter? How would a small exhaust pipe diameter (not able to exhaust air enough) affects the capacity of an air dryer? If it does, could you expand on this? Thank you

Hi all, Thanks for your reply. The control logic would ideally be system-free which means that it does not depend on a system to work, however I am currently working with a variable primary flow chilled water system. What I have so far is feeding the controller the historical data of each...

Hi All, I'm working on an automated chiller control system for final year project. It is a logic control that automatically set the chill water supply temperature based on current demand load and the chillers performance curve to achieve the best efficiency COP for the system. For a variable...

Hi Russ, There are more to this problem but I would first like to be educated on this: Say for a given chiller system, I would like the evaporator water leaving temperature set at say 6C with a 4000gpm flow rate and the evaporator returning temperature at 14C. Now I know that the total cooling...

What I am looking for is a set of equation showing the relationship between the chilled water supply setpoint and the compressor load(centrifugal compressor % running). I understands that Q(Load) = Efficiency * Q(Chiller) and Q = cp * Flow * density * dT. But how would this relates to compressor...

Hi All, Is there a list of thermodynamics equations regarding the chiller process from condenser, evaporator, compressor to the regulator. Say I have chiller load at 90%, what set of equations could I use to determine the supply temperature of chill water and condenser supply temperature to...

If two of the air have the same pressure shouldn't the resultant mixture have the same pressure as well? So air mixing is inevitable? Could you expand on this? Thanks.

Two compressed air(A, B) at 100 PSIG: Air A - Compressed with -70C dew point. Air B - Compressed without entering an air dryer. If this two compressed air is distributed into a tank together, would the the air mix to form Air C (same pressure with dew point between air A and B)? I have read a...