Philippe Nguyen, Robert Schofield
We made a shaker injection at the corner station and several impulse injections at EY.
Also, I manipulated the HVAC. This was done during observation mode, as in the past, since we don't drop observing for automatic and other usual HVAC changes. The figure shows that the HVAC is costing us 3 or 4 MPc. I then did a bunch of manipulations to narrow down the source. The dominant problem seems to be AHU 1,2 and 3, and, to a lesser extend, the turbines at the end stations. These are all running at higher rates than they were during O2. I will try do some further manipulations tomorrow to determine how much range we could get by going back to normal flows (my understanding is that they were increased for improved temperature control, I believe during the winter).
Here is the list of manipulations :
Switching all off. Begin: 16:35; All off: 16:44
Switching all back on. Begin 16:59; All on 17:10
Switching all off: Begin 17: 22; All off: 17:33
Switching all back on: Begin 17:48; All on: 17:57
Switching all off: Begin: 18:14; All off: 18:25
Switching all on: Begin 18:44; All on: 19:06
Switching off EY. Begin: 19:31; EY off: 19:39
Switching EY back on. Begin: 19:49; on: 19:55
Switching off CS AHU-3. Begin: 19:54; AHU-3 off: 19:55
Switching on CS AHU-3 and turning off CS AHU-1&2. Begin 22:02; Complete: 22:03
Switching off CS chiller. Begin 20:13; off: 20:20
Switching on CS AUH-1&2 and chiller AND switching off EX. Begin: 20:25; Complete: 20:35
Switching on EX. Begin: 20:49; End: 20:51
Switching EX off. Begin: 21:06; All off: 21:15
Switching EX back on. Begin: 21:30; All on: 21:45
Switching CS AHU4 (office area) off. Begin: 21:57 Off: 21:58
Switching CS AHU4 ON and turning EX off. Begin: 22:06; Complete: 22:15
Switching EX on. Start: 22:31; EX on: 22:33
Switching CS AHU1,2,3, chiller off. Start: 22:50; Complete: 22:59
Switching CS back on: 23:07
A correction: the corner station AHU 1,2 are not running at higher flows than they have been historically, while AHU 3 and the end stations are. This means there will be less to gain, so we didnt get back to shutting down on Sunday. Nevertheless, there could be some gain by dropping the EY and EX flow rates from about 11k CFM to between 8 and 9k CFM, and AHU3 down to about 6 per 5 & 6 from about 7k CFM per fan to about 6k CFM. Hopefully I will get a chance to try this.