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I made some corrections to the original post. There is no option to edit text after it has been posted... ________________________________ We recently replaced an existing single gas pressure regulator that was feeding three boilers with three new dedicated pressure regulators to improve...

I agree with the comments regarding staging your chillers based on the percent load of each chiller. I would make the trigger point to stage up or down match the chillers performance curve. Example: if your chillers sweet spot is between 60% and 80% load, I would program the next chiller to come...

We recently replaced an existing single gas pressure regulator feeding that was feeding three boilers with three new dedicated pressure regulators to improve pressure control. The pressure after the new regulators was fluctuating until we disconnected the new ½” vent lines connected each of the...

My own conclusion, In refrigeration, the cooling effect is not the direct transformation of the energy input. The operation of cooling equipment has many energy outputs, manly in heat and the mechanical forces driving pumps, compressors, fans, etc. One of the effects of all these activities is...

@tys90 Thanks again. I agree, for this application I need to keep them separated

@tys90 Thanks for the replay. It does make sense if we knew the central plants' COP (coefficient of performance?)We could calculate the energy use that way. Having some electrical experience, I am used to for example in motors: If you know the volts, amps, and motor efficiency, you can get a...

Thanks, unfortunately, I am still not understanding. If when producing CHW I use .7 kWh which produces 1 Ton per hour (all this in 1 hr) How do you explain that with the equivalencies that you mention above?

I work at a high rise building and part of my job is to manage the energy intensity of the building. In order to come up with the total energy use for the building we had to convert all energy types to a common energy unit, in this case kBTUs, and add the totals. Chilled Water (CHW) The...

Is there a typical efficiency or heat gain rate due chilled water distribution and insulation inefficiencies? Example: A Chiller producing 1000 tons/hr of which 750 tons are used by fan coil units and maybe the rest is lost in distribution heat gain. In this example the efficiency would be...