- M0 - Lead Sheet, Legend & Schedules
- M1 - Plumbing (?)
- M2 - Fire Protection (?)
- M3 - HVAC Plan, Basement / Crawlspace
- M4 - HVAC Plan, Lower Level
- M5 - HVAC Plan, Upper Level
- M6 - HVAC Plan, Roof
- M7 - Sections & Elevations
- M8 - Sections & Details
- M9 - Control Diagrams
Tuesday, November 20, 2007
Drawing List
Topic: Drawing list for Building #4 Humidity Control Project.
Friday, November 16, 2007
Design Airflow Estimation
| Return Air System: | Duct Size | CFM | ||
| S1 (2-4) | 22" | 3000 | ||
| 20" | 2000 | |||
| 20" | 2000 | |||
| 18" | 1000 | (est.) | ||
| Total | 8000 | Exhibition Hall CFM | ||
| S2 (2-5) | 22" | 3000 | ||
| 20" | 1250 | |||
| 20" | 1250 | |||
| Sub-Total | 5500 | Exhibition Hall CFM | ||
| 24" | 2200 | Auditorium CFM | ||
| 10" | 390 | |||
| 14" | 750 | |||
| Total | 8840 | Exhibition, Auditorium, etc | ||
| S3 (2-6) | 34x16 | 3300 | ||
| 34x16 | 3300 | |||
| Total | 6600 | Exhibition Hall CFM | ||
Mechanical & Maintenance Line-Items
Topic: Identification of mechanical and maintenance line items for humidity control project and look-ahead maintenance budget.
- Electric Coils: Functionally test and verify the operation of each heating element circuit in the electric heating coils; replace failed elements. Consider replacement of coil control panels.
- Chilled water pump rebuild/replacement. Consider chilled water pump variable-speed drive.
Monday, November 5, 2007
Questions for PSC
- How many floor registers are there?
- What is the nameplate data on the paint boot exhaust fan?
- Is landscaping restoration to be provisioned by PSC, or by the humidification control project?
- What are the exact specifications, in terms of temperature and relative humidity and rate of change for each per hour, for a sensitive exhibit?
Thursday, November 1, 2007
Field Survey #1 (DRAFT)
Summary of field survey conducted from approximately 10 a.m. until 2 p.m. Thursday, November 1, 2007. Weather conditions clear and sunny, about 50°F (high of 52°, low of 40°).
HEI represented by Brandon Nichols and Jesen Irwen met with David Irwin from JCI and Dave Roberts from PCS at 10 a.m. HEI returned the drawings for the Ackerley addition and operation manual for the Trane rooftop units to Dave Roberts, borrowed two weeks previously.
Return air floor registers are nominal 12 x 12 cutouts, 11.5 x 11.5 throat dimension, approximately 50% free area. These registers were fabricated by PSC in their metal shop. They have a couple of different models, one of which is more supportive of forklift traffic. Additional registers may be fabricated by PSC, or by a local machine shop based on prototypes provided by PSC.
Upon inspection of the intake and discharge plenums, a number of items were noted:
PCSI provided to HEI one copy each of the original electrical and mechanical operation and maintenance manuals for inspection, to be returned within one month.
Mechanical Equipment Data
The supply air units found in the mechanical subfloor labeled SA-2.1, 2.2 and 2.3 each have the following identical nameplate data: Pace Equipment Co., Portland, Oregon, Model A-19 Serial P8993. The middle unit has a recently-replaced cooling coil, the other two are scheduled to have their cooling coils replaced by JCI prior to construction of the humidification control project.
Desired by PCSI is some automation of the lower-level units. HEI and JCI agreed to identify this feature as a line item in a budget-priority sort on maintenance upgrades which may be either included in the humidification project or addressed by separate purchase orders to JCI.
Using a Dedicated Outdoor Air System (DOSA) seemed to HEI, JCI and PCSI to make more and more sense as we studied the condition of the existing system. Using a DOSA, supply-air units would require the minimum number of control points, e.g. supply air temperature input with start-stop and analog heating/cooling demands outputs.
Current power bill is about $35,000 per month, presumably for the entire site. Is there any submetering by building? If not, shall we install split-core current transmitters, even temporarily with data loggers, now to help document the energy savings of the new system?
Electrical Data
The main distribution board is in a vault under Building #2(4), with main breaker rated at 600 V/4000 amps. About a year ago, a ground fault in one of the electric coil step controllers propagated through the branch circuit and building breakers, and tripped this main breaker for the site.
The breaker labeled #2 in the main distribution board is rated at 600 V/1600 amps -- but it is not at all clear that this breaker actually feeds Building #4(2). At the building distribution, the lighting distribution panel is rated at 1600 amps, while the HVAC equipment and electric heating panel is rated at 1200 amps. So evidently, there are two breakers from the main distribution board that feed Building #2(4).
Ground fault and overload setting of the panel and distribution board breakers should be done for Building #4(2) as part of the humidity upgrade project, and be made a line item in the maintenance upgrade plan for the entire site.
In the center of the equipment board, there are two evidently unused 200A breakers. Also at the end of the board there's evidently an available breaker position.
Controls Data
Shortly after observing the outside air damper at 100% open and electric heating coils operational, both the exhaust damper and the recirculation damper were observed to be closed. The return fans were essentially deadheading into a closed plenum. The wholesale end-of-service life failure of many control components comprising the original economizer system is one fundamental justifications for a DOAS.
Whatever capacity is taken away by derating electric heating coils would need to be reprovisioned and then some by the DOAS. The DOAS heat source would be natural gas instead of electricity.
It may be possible to accomplish throttling using wireless actuated diffusers. A big cost savings would be avoiding a reheat in VAV boxes.
Operational Considerations
Anecdotally Dave Roberts related that when the temperature is 19°F outside, the building space temperature inside cannot be maintained. When the people load arrived, the problem was mitigated. Supplementally the DOAS could provide the difference in terms of heating capacity, as it too will have 100% recirculation capability. Note that operation of a electric heating coils should be functionally tested as part of the humidification control project. If there are operational or reliability issues with the existing electric coil control panels, the panels could be updated with simple PLC relay logic, which could be programmed it to help equalize thermal stress on the thermal elements by rotating the lead element monthly.
PSC requires the ability to change the airflow using automation system. A potentially less expensive alternative to VAV boxes may be actuated drum diffusers. PSC requires the ability to vary the airflow to match load according to a people concentrations depending upon the exhibit.
Potentially the DOAS will have independent temperature set point from the fancoil system. PSC would like the flexibility of wireless thermostats as well. Sets of diffusers would be keyed to a thermostat, but that thermostats placement could be moved depending on the exhibit. Any one, but only one at a time, of the thermostats could be designated as critical by the operators. This primary thermostat would control the temperature setpoint of the DOAS, with temperature control staged after airflow control.
People loads tend to concentrate near focal points of the exhibit. Exhibits are unique in terms of load distribution, for instance the Titanic included an ice wall.
Floor registers will be outsourced or manufactured by PSC. Some of the registers will be reinforced to support forklift traffic.
For the entryway at the south end of the building during the Lucy exhibit, there will be a separation wall constructed. The entryway will be unconditioned space, and provided with portable heaters by PCSI when required.
Anecdotally, four supply diffusers in the upper mezzanine area are inadequate, and neither was four tons of supplement to cooling in this area during the Dead Sea Scrolls enough. Registers shown at the mezzanine stairwell are returns.
Unit Location Considerations
An ideal location for the DOAS unit is where one of the conifer trees now stands at the northwest corner of the building. The remaining trees would screen the unit to the west and south, perhaps the existing tree can be moved to screen the unit from the north.
Dave Roberts measured 28 feet from the north wall to fire standpipe on the west side Building #4 wall. The Building #5 outside air intakes measures at 3'5" x 21'6". Unit location may not obstruct access to the fire standpipe or airflow into Building# 5.
It is envisioned that the new unit would be located roughly centered north-south on the outside air intake for Building #5, approximately12 to 16 feet west of Building #4, discharging exhaust air west, away from both Building #4 and the OSA intake for Building #5.
Exterior Ductwork Considerations
The exhaust fan for the paint shop is located very near where the outside air intake the new unit was envisioned to terminate above the roofline. On the next field investigation, HEI will need to access the roof to measure and photograph the existing exhaust fan.
A duct penetration midway between the columns (or plinths) would be bisected by the panel joint. This may or may not present a problem; coordination with structural is required. Given a DOAS and a smaller ducts than shown in the proposal, an alternative is to split the ducts such at the penetration required is no more than 20 or 22 inches in diameter. This may require two, three or four penetrations each for the supply and return; airflow calculations pending.
Stakeholder Coordination
Dave Roberts has discussed the exterior visual impact issues with PSC executives, and landscaping issues with the campus horticulturalist. It is envisioned that the unit and the ductwork will be painted to match the exterior of the building, and that the existing landscaping will screen both the new unit and the ductwork penetrating the building, with the possible replacement of one conifer tree.
No impacting stakeholder issues are envisioned at this time due to the exterior ductwork or unit location selection.
Clarification is requested by HEI as to whether landscaping restoration will be provisioned by PSC, or is within the scope of the humidification control project.
Field Survey #2 Look-Ahead
The next field investigation will
HEI represented by Brandon Nichols and Jesen Irwen met with David Irwin from JCI and Dave Roberts from PCS at 10 a.m. HEI returned the drawings for the Ackerley addition and operation manual for the Trane rooftop units to Dave Roberts, borrowed two weeks previously.
Return air floor registers are nominal 12 x 12 cutouts, 11.5 x 11.5 throat dimension, approximately 50% free area. These registers were fabricated by PSC in their metal shop. They have a couple of different models, one of which is more supportive of forklift traffic. Additional registers may be fabricated by PSC, or by a local machine shop based on prototypes provided by PSC.
Upon inspection of the intake and discharge plenums, a number of items were noted:
- On this relatively crisp fall day seemingly ideal for economizer operation, the outside air dampers were at 100% open position, the recirculation air damper at 0% open position, and the electric coils operational providing heat to the space.
- Three-way valves seem to be of good quality and functional, however the two-position actuators need upgrading.
- Outside air for the building is obtained from ground level intake louvers. The relatively new filter banks protecting the coils are quickly fouled black by vehicle exhaust soot from Queen Anne Ave, Denny Way, 2nd Ave and even ships from Elliott Bay.
- Upon inspection of the exhaust plenum, these louvers were discovered to be driven closed along with the recirculation air damper.
PCSI provided to HEI one copy each of the original electrical and mechanical operation and maintenance manuals for inspection, to be returned within one month.
Mechanical Equipment Data
The supply air units found in the mechanical subfloor labeled SA-2.1, 2.2 and 2.3 each have the following identical nameplate data: Pace Equipment Co., Portland, Oregon, Model A-19 Serial P8993. The middle unit has a recently-replaced cooling coil, the other two are scheduled to have their cooling coils replaced by JCI prior to construction of the humidification control project.
Desired by PCSI is some automation of the lower-level units. HEI and JCI agreed to identify this feature as a line item in a budget-priority sort on maintenance upgrades which may be either included in the humidification project or addressed by separate purchase orders to JCI.
Using a Dedicated Outdoor Air System (DOSA) seemed to HEI, JCI and PCSI to make more and more sense as we studied the condition of the existing system. Using a DOSA, supply-air units would require the minimum number of control points, e.g. supply air temperature input with start-stop and analog heating/cooling demands outputs.
Current power bill is about $35,000 per month, presumably for the entire site. Is there any submetering by building? If not, shall we install split-core current transmitters, even temporarily with data loggers, now to help document the energy savings of the new system?
Electrical Data
The main distribution board is in a vault under Building #2(4), with main breaker rated at 600 V/4000 amps. About a year ago, a ground fault in one of the electric coil step controllers propagated through the branch circuit and building breakers, and tripped this main breaker for the site.
The breaker labeled #2 in the main distribution board is rated at 600 V/1600 amps -- but it is not at all clear that this breaker actually feeds Building #4(2). At the building distribution, the lighting distribution panel is rated at 1600 amps, while the HVAC equipment and electric heating panel is rated at 1200 amps. So evidently, there are two breakers from the main distribution board that feed Building #2(4).
Ground fault and overload setting of the panel and distribution board breakers should be done for Building #4(2) as part of the humidity upgrade project, and be made a line item in the maintenance upgrade plan for the entire site.
In the center of the equipment board, there are two evidently unused 200A breakers. Also at the end of the board there's evidently an available breaker position.
Controls Data
Shortly after observing the outside air damper at 100% open and electric heating coils operational, both the exhaust damper and the recirculation damper were observed to be closed. The return fans were essentially deadheading into a closed plenum. The wholesale end-of-service life failure of many control components comprising the original economizer system is one fundamental justifications for a DOAS.
Whatever capacity is taken away by derating electric heating coils would need to be reprovisioned and then some by the DOAS. The DOAS heat source would be natural gas instead of electricity.
It may be possible to accomplish throttling using wireless actuated diffusers. A big cost savings would be avoiding a reheat in VAV boxes.
Operational Considerations
Anecdotally Dave Roberts related that when the temperature is 19°F outside, the building space temperature inside cannot be maintained. When the people load arrived, the problem was mitigated. Supplementally the DOAS could provide the difference in terms of heating capacity, as it too will have 100% recirculation capability. Note that operation of a electric heating coils should be functionally tested as part of the humidification control project. If there are operational or reliability issues with the existing electric coil control panels, the panels could be updated with simple PLC relay logic, which could be programmed it to help equalize thermal stress on the thermal elements by rotating the lead element monthly.
PSC requires the ability to change the airflow using automation system. A potentially less expensive alternative to VAV boxes may be actuated drum diffusers. PSC requires the ability to vary the airflow to match load according to a people concentrations depending upon the exhibit.
Potentially the DOAS will have independent temperature set point from the fancoil system. PSC would like the flexibility of wireless thermostats as well. Sets of diffusers would be keyed to a thermostat, but that thermostats placement could be moved depending on the exhibit. Any one, but only one at a time, of the thermostats could be designated as critical by the operators. This primary thermostat would control the temperature setpoint of the DOAS, with temperature control staged after airflow control.
People loads tend to concentrate near focal points of the exhibit. Exhibits are unique in terms of load distribution, for instance the Titanic included an ice wall.
Floor registers will be outsourced or manufactured by PSC. Some of the registers will be reinforced to support forklift traffic.
For the entryway at the south end of the building during the Lucy exhibit, there will be a separation wall constructed. The entryway will be unconditioned space, and provided with portable heaters by PCSI when required.
Anecdotally, four supply diffusers in the upper mezzanine area are inadequate, and neither was four tons of supplement to cooling in this area during the Dead Sea Scrolls enough. Registers shown at the mezzanine stairwell are returns.
Unit Location Considerations
An ideal location for the DOAS unit is where one of the conifer trees now stands at the northwest corner of the building. The remaining trees would screen the unit to the west and south, perhaps the existing tree can be moved to screen the unit from the north.
Dave Roberts measured 28 feet from the north wall to fire standpipe on the west side Building #4 wall. The Building #5 outside air intakes measures at 3'5" x 21'6". Unit location may not obstruct access to the fire standpipe or airflow into Building# 5.
It is envisioned that the new unit would be located roughly centered north-south on the outside air intake for Building #5, approximately12 to 16 feet west of Building #4, discharging exhaust air west, away from both Building #4 and the OSA intake for Building #5.
Exterior Ductwork Considerations
The exhaust fan for the paint shop is located very near where the outside air intake the new unit was envisioned to terminate above the roofline. On the next field investigation, HEI will need to access the roof to measure and photograph the existing exhaust fan.
A duct penetration midway between the columns (or plinths) would be bisected by the panel joint. This may or may not present a problem; coordination with structural is required. Given a DOAS and a smaller ducts than shown in the proposal, an alternative is to split the ducts such at the penetration required is no more than 20 or 22 inches in diameter. This may require two, three or four penetrations each for the supply and return; airflow calculations pending.
Stakeholder Coordination
Dave Roberts has discussed the exterior visual impact issues with PSC executives, and landscaping issues with the campus horticulturalist. It is envisioned that the unit and the ductwork will be painted to match the exterior of the building, and that the existing landscaping will screen both the new unit and the ductwork penetrating the building, with the possible replacement of one conifer tree.
No impacting stakeholder issues are envisioned at this time due to the exterior ductwork or unit location selection.
Clarification is requested by HEI as to whether landscaping restoration will be provisioned by PSC, or is within the scope of the humidification control project.
Field Survey #2 Look-Ahead
The next field investigation will
- Verify CAD backgrounds, constructed from scanned records and photographs.
- Schematically route ductwork and place equipment
- Measure airflow through representative floor registers
- Investigate chiller plant and chilled water circulating pumps
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