Inconsistent Hourly Results Hot Water
I'm extracting the hourly run period consumptions from several simulations and I'm getting inconsistent results between the Energy Plus HTML report and the hourly output.
I'm pulling: Output:Variable, *, !- Key Value Water Heater NaturalGas Energy, !- Variable Name Hourly; !- Reporting Frequency
When i sum the hourly output I'm getting 20% less energy than the HTML report for Water Heating Energy Consumption. What am I doing wrong or is there a simulation error? I checked the output units in Wh to Therms and i'm finding the mismatch. I would have expected these two values to be the same.
Services used: Open Studio Application 3.5.1 Energy Plus 22.2.0 DView: Windows 64
I upload 4 files to github that could help recreate the error, they are all from the same simulation. https://github.com/SDonohueRI/Energy-...
I believe i found the energy difference i was looking for in the .mdd file.
Annual Building Utility Performance Summary (in the .html file) shows:
For Meter=WaterSystems:NaturalGas [J], ResourceType=NaturalGas, EndUse=WaterSystems, contents are: 600 GAL WATER HEATER - 600 KBTU/HR:Water Heater NaturalGas Energy 600 GAL WATER HEATER - 600 KBTU/HR:Water Heater Off Cycle Parasitic NaturalGas Energy 600 GAL WATER HEATER - 600 KBTU/HR:Water Heater On Cycle Parasitic NaturalGas Energy
As i understand this the end-use consumption for natural gas for water systems is the sum of these three.