Using the PRM Navigator for LEED (for a completed design), when and where should I be overriding things like heating/cooling equipment capacity, fan air flow, and outside air flow in the proposed model (and baseline for OA)?
I have used prototype systems in ApHVAC that take advantage of auto-sizing of these features. I know the loads data spreadsheets found in the project directory are written to and then read from during the "sizing runs" steps in the PRM workflow.
1. When is the appropriate time to set the heating/cooling capacity, supply air flow, ventilation air flow in proposed and baseline systems?
2. How should I be setting these? In the loads data spreadsheets or the ApHVAC systems?
3. If it's the spreadsheets, which tabs and variables should be used for each system parameter being overridden?
Thanks in advance.
PRM Navigator - When to override proposed HVAC
Re: PRM Navigator - When to override proposed HVAC
It is better to read through Apache View manual and PRM manual several times to fully understand them and the process.
Another thing is try to use a small model to test and monitor what is happening in every step.
Another thing is try to use a small model to test and monitor what is happening in every step.
Re: PRM Navigator - When to override proposed HVAC
Geshen,It is better to read through Apache View manual and PRM manual several times to fully understand them and the process.
Another thing is try to use a small model to test and monitor what is happening in every step.
I do respect your advice to "read the instructions," because sometimes people ask questions without trying to find it for themselves. However, I have read through the applicable user guides and the answer is not given.
I am also confident that I could figure it out, given some time and iterations. However, I have posted the question here because I feel like there are a few people out there who know the answer already and wouldn't mind sharing their knowledge. This would save me a bit of time and (more importantly) help people that run into the same issue in the future. That is the point of this forum, is it not?
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Greg
Greg
Re: PRM Navigator - When to override proposed HVAC
Hi Greg
I just try to answer directly.
1. When is the appropriate time to set the heating/cooling capacity, supply air flow, ventilation air flow in proposed and baseline systems?
For baseline, flowrate setting and coil size will be done automaticaly through "assign room sizing data"
fan data is automatically set by "update baseline fan sizing data"
For proposed model, you might want to input your data which maybe from M&E designer. This shall be done after "update baseline fan sizing data" if your propose model is also built by PRM navigator. Otherwise, you can build you own proposed HVAC model whenever you want.
2. How should I be setting these? In the loads data spreadsheets or the ApHVAC systems?
baseline automatically calculated and updated in aphavc model
3. If it's the spreadsheets, which tabs and variables should be used for each system parameter being overridden?
Check the tab containing the system name you are using: system 1 &2, 3&4, etcs.
However, I still suggest you work on a small test model first, and after every step, monitor what happened in your working folder and what happened to load spreadsheet
I just try to answer directly.
1. When is the appropriate time to set the heating/cooling capacity, supply air flow, ventilation air flow in proposed and baseline systems?
For baseline, flowrate setting and coil size will be done automaticaly through "assign room sizing data"
fan data is automatically set by "update baseline fan sizing data"
For proposed model, you might want to input your data which maybe from M&E designer. This shall be done after "update baseline fan sizing data" if your propose model is also built by PRM navigator. Otherwise, you can build you own proposed HVAC model whenever you want.
2. How should I be setting these? In the loads data spreadsheets or the ApHVAC systems?
baseline automatically calculated and updated in aphavc model
3. If it's the spreadsheets, which tabs and variables should be used for each system parameter being overridden?
Check the tab containing the system name you are using: system 1 &2, 3&4, etcs.
However, I still suggest you work on a small test model first, and after every step, monitor what happened in your working folder and what happened to load spreadsheet