Hello,
Hopefully I'm posting in the correct forum subject headings. I am new to the energy modeling community and had a few questions in regards to District Cooling. We have a 2 pipe FCU with electric heat and district cooling. I am unsure how to model the baseline building's heating. I have read from released documents from USGBC that seem to indicate that the baseline building (with no district heating) is to be modeled with a hot water boiler. But this assumes that I am working with a 4 pipe system. I cannot seem to find anything on the 2 pipe system. Do I just model the baseline with electric heating too? Or do I model the baseline with a hot water boiler even if the proposed is electric? Thanks to all in advance for your help.
First refer to ASHRAE 90.1 Appendix G requirements and after your system is selected refer to the USGBC "Treatment of District or Campus Thermal Energy in LEED v2 and LEED 2009 - Design and Construction" (see attached images below). It appears that you would be selecting Option 1; which would refer you to Table 3 to select the system to be modeled as a baseline.
Which system have you selected?