[EnergyPlus_Support] multi-primary pumps+secondary pump

[韩星 <foolishstar@xxxxxxx>]

I'm now trying to simulate a pri/sec system with two primary pumps.  

I tried three ways to do that but all failed.

first, I put the two pumps on the same branch, then, E+ told me that the pump had to be the first component in a branch.

Second, I tried to use two separate primary pump branches (two inlet branches), and the plant loop only has one plant side inlet node, so I set two plant loops, but E+ said that the demand side node name cannot be the same.

Last, I put the two primary pumps on the chiller branch, and the secondary pump on a separate branch. But the error occured showing as follows:

   ** Severe  ** Current version does not support Loop pumps and branch pumps together

   **   ~~~   ** Occurs in loop CHW LOOP

The ASHRAE 90.1 requires that "each chiller shall be modeled with separate condenser water and chilled water pumps interlocked to operate with the associated ". Is it correct that I take it as each chiller should have one separate condenser water pump and one separate chilled water pump?

Thanks!

Han Xing

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