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Thread: Energy Management
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22-05-2006, 07:10 PM #1
Energy Management
Does anyone have any guidelines or checklists for energy management / cost reduction for refrigerated warehouses?
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22-05-2006, 08:05 PM #2
Re: Energy Management
HI nh3wizard,
I don't know off any checklists but I can offer the following guidelines:
1) Get the discharge pressure down. Depending on your system installation and requirements you should be able to operate as low as 100 psi (6.89 bar g) or lower when the wet bulb temperatures are low. You may have some limitations that will not allow you to decrease too far.
2) Use VFD's on the condenser and evaporator fans.
3) get the suction pressure as high as possible.
4) keep the screw compressor(s) fully loaded to at least 80-90%. This can cost you some big money ($$) if they operate at part load.
5) Keep the doors closed! (as much as possible).
6) Try to use off-peak power when possible.
7) Keep the non-condensables out of the system.
8) Add more condenser capacity.
9) Know what your electric utility is charging you for power and how they bill you.
That is a short list of the important items.
Best Regards,
US IcemanLast edited by US Iceman; 22-05-2006 at 09:42 PM.
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22-05-2006, 09:34 PM #3
Re: Energy Management
A short list...that's THE list which covers 95% of the savings you can make, especially point 1 - 3 and 2 (in order of importance for me)
It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.
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23-05-2006, 04:22 AM #4
Re: Energy Management
Don't forget to clean the coils every once in a while and check the system for problems.
"If Hannah was an air handler, I would be a condensing unit so I could open her TXV and pump my refrigerant through her coils." - a HVAC friend of mine
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