Baseline Pumping Power

The baseline must be 22 W/gpm of collective chilled water pump power (both primary and secondary). The loop is auto-sized which determines the gpm needed. I can't really say how to solve the pump issue in your designs that produces greater power demands than the baseline. It is unusual that you would have this issue because most projects show a savings against the baseline.

No. The Proposed must be modeled as designed and the Baseline loop is auto-sized.

Correct me if I am wrong - I would convert the 75' head to pressure and calculate the gpm of the proposed system. I.e. if you have 1000 gpm, 100' head & 40 hp pump. For the sake of LEED proposed, I would put calculated w/gpm value considering it on 75' head. That way it could be apple to apple not apple to orange.

The proposed loop would be modeled as designed. The proposed pump is sized based on the head and the flow needed to serve the coiling coils in the Proposed design. The 75' head is what was used to come up with the 22W/gpm in the baseline, it is not a value you should use in the models at all. The baseline pump size would be determined by auto-sizing the loop and using the required W/gpm. This will provide you with the necessary flow to serve the coils to meet the load. It seems as if you are trying to design the baseline system which is a common tendency for mechanical designers. It is not designed. In some cases as it is modeled would not actually function in reality. It must function in the computer simulation, not in real life. In many cases you don't want this to be apples to apples because the system configuration can vary and this should be taken into account.