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How to fix these error: "Gross Rated Total Cooling Capacity [W] will be limited by the maximum rated volume flow per rated total capacity ratio"

asked 8 years ago

melanie's avatar

updated 8 years ago

In all the Cooling Coils of the Variable Refrigerant Flow System is happening the same error:

* Warning * SizeDXCoil Coil:Cooling:DX:VariableRefrigerantFlow TU7 VRF DX COOLING COIL * ~~~ * ...Gross Rated Total Cooling Capacity [W] will be limited by the maximum rated volume flow per rated total capacity ratio. * ~~~ * ...DX coil volume flow rate ( m3/s ) = 2.347873 * ~~~ * ...Requested capacity ( W ) = 15364.597 * ~~~ * ...Requested flow/capacity ratio ( m3/s/W ) = 1.528E-004 * ~~~ * ...Maximum flow/capacity ratio ( m3/s/W ) = 6.041E-005 * ~~~ * ...Adjusted capacity ( W ) = 38865.635

And as you can see, automatically for to adjust the ratio, the capacity of the coils are almost triplicating.

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answered 4 years ago

Arthur Portugal's avatar

Hello, how are you?

I saw your question, I had the same problem.

Your problem is being in the field "Zone Cooling Temperatura Supply Air" on the class of external unit (condenser).

It's probable that your design ins't very well. The default of the program is deltaC = 11 C. Try to put 9 C, or less, for solve the problem.

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answered 4 years ago

This is only a Warning . You can force energyplus simulation (not the sizing simulation obviously) by hardsizing the values you need.

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Asked: 8 years ago

Seen: 534 times

Last updated: Nov 08 '20