PRM - Unreasonable Energy Usage

[geneharn]

Hi, I have successfully run finish the PRM report and I am unable to troubleshoot several readings as the energy usage of proposed model is unreasonably higher than baseline model.

For example, the PRM report states proposed and baseline lighting power density to be the same. However, in the input options of "Internal Heat Gain", I have clearly placed a reduction in lighting power (as shown below).



Another point is that my pumps consumption is 13,000,000 kWh for the proposed case while baseline has merely 500,000kWh. This is weird because I didn’t specify any consumption for my proposed chilled water pump. Is there a setting concern on usage profile that I have to change? Correct me if I am wrong that both proposed and autogenerated baseline share the same usage profile by default pls.

Anyone encountered the same problem? Thanks!

[jm2000]

Did you get any guidance or resolution on this?

[AllenMei]

Please see below.

For example, the PRM report states proposed and baseline lighting power density to be the same. However, in the input options of "Internal Heat Gain", I have clearly placed a reduction in lighting power (as shown below). The final interior lighting power/gain is finalized in room tabular editing, try to edit LPDs there instead of in the navigator


Another point is that my pumps consumption is 13,000,000 kWh for the proposed case while baseline has merely 500,000kWh. This is weird because I didn’t specify any consumption for my proposed chilled water pump. Is there a setting concern on usage profile that I have to change? Correct me if I am wrong that both proposed and autogenerated baseline share the same usage profile by default pls.Under ApacheHVAC, go to Generic Heat Source, check those that are in use, make sure pump power peak and pump usage% are 0 if you are not using those

Hope this helps.