Ventilation in High Rise Residentail

[joesinger12]

I cannot figure out have to make the baseline building a forced ventilation system, despite the following item in the changelog for version 3d:

When I set my proposed building up as forced, the baseline is still simulated as natural which imposes a big penalty. Can you tell me how to do this correctly?

Reported by: joesinger12

Original Ticket: cbecc-com/tickets/1854

[joesinger12]

8/5 DR - I reviewed the ‘Residential’ model and confirmed that when the proposed case is 'Forced' ventilation, the Baseline case is also forced, but it is exhaust-based ventilation and the exhaust fan is only sized for the ventilation rate. This is likely why the proposed design uses more fan power.

Original comment by: joesinger12

[joesinger12]

8/9 User - Thanks for the update. Something still doesn’t seem right though, given the huge difference in fan power. If the baseline is FPFC with baseline fan power (1.27” H2O) , and the exhaust fan runs constantly also with baseline fan power (2.65” H2O), I would not expect to see such a big difference. The fan coils in my proposed model have less than 1” of static, so a more than two fold increase in fan energy doesn’t seem to make sense.

Original comment by: joesinger12

[joesinger12]

8/9 DR - The difference is that the baseline exhaust fan flow is less than the design supply flow of the baseline FPFC system. The baseline exhaust fan flow is equivalent to the required ventilation rate.

Original comment by: joesinger12

[joesinger12]

• Milestone: None --> Com2016C

Original comment by: joesinger12

[joesinger12]

Assigning to COM2016C - Baseline to be reviewed for future release

Original comment by: joesinger12

[joesinger12]

• Type: Other --> Review
• Version: CBECC-Com 2013-3d --> CBECC-Com Repo
• Milestone: Com2016C --> Com2016.3.0

Original comment by: joesinger12

[joesinger12]

For review

Original comment by: joesinger12

[joesinger12]

• private: No --> Yes

Original comment by: joesinger12

[joesinger12]

• Milestone: Com2016.3.0 --> Com2019.1.0

Original comment by: joesinger12

[joesinger12]

• Milestone: Com2019.1.0 --> ComDevIssue

Original comment by: joesinger12

[joesinger12]

• Milestone: ComDevIssue --> CBECC2022DevIssues

Original comment by: joesinger12