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90.1 - Energy Use Summary Screen #846

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago 
Scott and David,

A few Energy Use Summary and Utility Rate issues:

1) The attached model is all electric with the exception of the 
CoreBotomReheatCoil.  I changed this heating coil to Type = "Furnace" and 
FuelSrc = "Oil".  The Energy Use Summary screen shows a small therms value 
under natural gas, but it should be under Fuel Oil (with a $0.00 cost/gallon 
applied from the Utility Rate tab).

2) A bigger issue is that there is only a Coil:HeatingElectric and 
Coil:HeatingGas in EnergyPlus.  So if we specify a heating coil Type = 
"Furnace" and FuelSource = "Oil" or "Propane" in CBECC-Com, EnergyPlus will 
simulate and display end use as natural gas.  I think we discussed that if the 
Utility Rate "Other" is specified then Natural Gas will be hidden in utility 
rates and either propane or oil cost will be used. Would we also need to hide 
natural gas from all enumerations in the software or would the utility rate 
fuel source override any specified values?

3) Propane is not available for heating coils of Type =  "Furnace". Only 
natural gas and oil are available.  Should propane be added to all heating 
coils?

Noah

Original issue reported on code.google.com by ncz...@archenergy.com on 6 Nov 2014 at 11:05

Attachments:

GoogleCodeExporter commented 9 years ago 
Is the issue that we can't really support multiple fuel types (fuel in the 
sense of combustion fuel) within a single EnergyPlus run?  Within EnergyPlus, 
can we somehow keep track of propane or oil and natural gas if multiple 
combustion fuels are used for heating?  Or, do we just set a project level 
parameter that says all combustion in the project is fuel X, let EnergyPlus 
report it as natural gas, and then just apply the appropriate utility cost to 
it?

Original comment by rhedr...@archenergy.com on 6 Nov 2014 at 11:16

GoogleCodeExporter commented 9 years ago 
Noah, 
I pointed this issue out a while ago, and there was no clear resolution at that 
time.  I asked Kyle and he was not aware of how to assign the Coil:Heating;Gas 
to a different fuel category for reporting.  I was intending to post a question 
on Unmet Hours to query how others have dealt with other fuels heating coils, 
but have not done so yet.  Do you want me to continue down that path, or 
perhaps PNNL has some experience with this?

Ultimately, if we don't have a way to account for differing TDV or costs for 
certain fuel types, I suggest we go through an remove the unsupported 
enumerations.

Original comment by da...@360-analytics.com on 6 Nov 2014 at 11:35

GoogleCodeExporter commented 9 years ago 
I think Roger's last statement is what we will need to do for phase 1.

"Or, do we just set a project level parameter that says all combustion in the 
project is fuel X, let EnergyPlus report it as natural gas, and then just apply 
the appropriate utility cost to it?"

Phase 2 will have boilers and water heaters that allow for the specification of 
fuel source in EnergyPlus (Electric, Natural Gas, Propane and Oil), so maybe 
the above solution could change then.

Original comment by ncz...@archenergy.com on 6 Nov 2014 at 11:39