These 2 files did not look like they attached when I looked at the Yahoo group site, instead they were inline which was not my intention.
I upload them instead to the Files\Examples folder.
-------- Original Message --------
Did you use the correct pump?
\memo This pump model is described in the ASHRAE secondary HVAC toolkit.
\memo Variable Speed Condensate pump for Steam Systems
It can be frustrating to manually create plant loops. But really, they are not that hard to understand. For example, I have used this " single cooling and heating plant" many times to connect to a single water based equipment model (usually VRF). Bottom line,
since I already have this plant available it is very easy to add to any input file using macro language.
The only connection between this stand alone plant input file and the main input file is here (this is in the main input file):
VRFCondInNode, !- Condenser Inlet Node Name
VRFCondOutNode, !- Condenser Outlet Node Name
I'm including both files for review.
Main input file: VariableRefrigerantFlow_5Zone_HeatRecovery_WaterCooled.imf
Plant library: VRFSinglePlantLoopBoilerTower.idf
Using this method, basically from a library of plant configurations, it becomes easy to implement.
I developed the PTAC model in E+ and do not understand your comment on configuration.
On 3/14/2013 5:18 PM, Edward G. Lyon wrote:
I cobbled together a steam boiler system by robbing 5ZoneSteamBaseboard.idf so I could supply one steam baseboard in my model. I now fully understand how little I know about piecing
together a functional mechanical system from EnergyPlus components without using templates (translation: what a pile of junk to add just to run a little radiator). I did not autosize anything because I know the radiator flow rate already. PlantPumps:CalcPumps
is throwing a GetSpecificHeatGlycol warning because it has a 107C temperature fluid. I suspect that the plant is so oversized that it supplies steam to the pump, but I would appreciate any suggestions for resolving this without reverting to an autosized solution.
Also, any references that simply explain how to take a set of fans, pipes, and coils in a box and make the appropriate nodes, loops, branches and controls for EnergyPlus would be
appreciated, I’ve never seen a PTAC in the field that actually looks like the EnergyPlus PTAC most people use, so I should probably build my own…
Ned Lyon, P.E. (MA, WV)
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