Open Studio: I am trying to model a gas-fired DHW loop.
The autosizing for a DHW loop does not work, as previously discussed here: https://unmethours.com/question/24353/openstudio-hot-water-loop-still-crashes/
When I manually size my system, as it was concluded was the right thing to do, my values are off by an order of magnitude, and I am uncertain as to why. I am using default schedules created by NREL, and comparing my values to CEUS and RECs as well as utility bills. I get reasonable results when I reduce my manually sized values by an order of magnitude.
When I set my gas fired DHW water heater to 36000 BTU/h (10550 W), it yields: 126.23 MBtu But when I reduce it to 1055 W, it yields: 28.87 MBtu.
Yearly bills on the existing building place our annual gas consumption in a range of 25-34 MBTUs.
