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Projects Updates for HVAC and Air Quality Assessment Pilot Project

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  1. HVAC and Air Quality Assessment Project Meeting (2-11-2022)

    Dhuvaraj Gambhire and Ali Khan met with Morgan White on 2-11-2022 to discuss how they can acquire a Notice to Proceed and access to the Atmospheric Science Building for testing.

    They will get a quote from Sterling, which will allow them to get a Purchase Order (PO). After they get the PO, they can get a Notice to Proceed and access to the building.

  2. Information about the occupancy schedule and Air properties of the ATMS Building

    According to F&S, Management Engineer, Mike Halm:

    1. Currently, this unit is in occupied mode on weekdays, 6AM to midnight.  Normally the occupancy schedule will more closely follow the hours the building is open, but runtimes were extended across campus as a precaution during the pandemic.

    2. When the building was originally designed, there likely wasn’t a set amount of air changes per hour applied to every classroom.  Typically for classrooms the heating and cooling airflows are determined based on the specific loads in each room, rather than applying a flat rate based on the volume of the room.  If it would help, we could share the original ventilation drawings from 1989.  Regarding the ASHRAE standards, any new construction or renovation work on campus should have mechanical ventilation provided in accordance with ASHRAE 62.1.  However, there were different codes and standards in place when this building was constructed 30 years ago.  The current version of ASHRAE 62.1 may have slightly different requirements than the codes in place when the building was built.

  3. Dhruv and Ali provided the following answers to Sterling with SafeTraces

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    This is an example of what the format used below.

    Q#: What is the answer to this question?

    A#: This is the answer to that question.

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    Dhruv and Ali provided the following answers to Sterling with SafeTraces:

     

     

    Q1: Please provide PDFs of the full floor plan layout drawings for the entire building. Be sure to include 
    square footage for each room and common areas. It is also very important to identify operable windows, if any? 

    A1: Floor plans with room areas attached. 
    Following files are attached for floor plans 
    B0300-01-11X17 Astronomy Building-(1st floor plan)-2021 
    B0300-02-11X17 Astronomy Building-(2nd Floor plan)-2021 
    (current/anticipated occupancy assumptions would be helpful) 

     

    Q2: What are the Astronomy Building's normal hours of operation?

    A2: Monday to Friday (0800 hrs-1700 hrs.). Saturday and Sunday the building is locked. 

     

    Q3: What is the air filtration rating for the spaces?

    A3: MERV :: HEPA Filters at AHU, currently MERV-13. 

     

    Q4: What is the Make/Model, age, specs and replacement/upgrade history of the existing HVAC system?

    A4: Original AHU from 1990, Trane Model 41A, Serial K89H24684. Original AHU equipment schedule attached. AHU controls originally pneumatic, upgraded to DDC (Siemens) in 2016 to allow occupancy schedules to be implemented. Zone level (VAVs) are still pneumatic.  I believe the fume hoods are only energized when in use.  Heating in the building is hot water radiators and hot water VAV reheat (no heating coil at AHU) fed from hot water boilers. 30% glycol cooling coil in AHU, fed from air cooled chiller on site. 

     

    Q5: What is the Make/Model and full specifications of the portable air purifiers expected to be used or are being used in the building? 

    A5: I don’t believe any portable air purifiers are currently in use. 

     

    Q6: Please identify all HVAC zones in the drawings. (Note: This is a command, not a question)

    A6: See zone map drawings Paul sent previously. Please review the attached file 
    CC-0300_09_V-700_RCX-Astronomy Building-Zones plan-AHU-EFU-2017 

     

    Q7: How many air-changes per hour is the HVAC system currently providing?

    A7: Will vary from room to room based on VAV damper position, ceiling height, etc. Based on a peak airflow of AHU (21,200 CFM), overall building area, and typical ceiling height (9’-0”), we’d have about 11.3 air changes per hour at peak load. 

     

    Q8: What are the basic assumptions for outside air intake to aid in dilution/ventilation for all interior spaces? 

    A8: AHU has a minimum OA position, and runs based on an occupancy schedule. We’ve temporarily changed our AHUs to run in occupied mode from 6AM to midnight for most of our units due to COVID-19 precautions. Unit is also sized for economizer when OA conditions allow. 

     

    Q9: What are the weather assumptions for heating and cooling the interior spaces along with outdoor temperature and humidity estimates?

    A9: I’m not positive what conditions the original designers used in 1990, but see page 2 of the “HVAC Systems” attachment from our facilities standards for our typical OA design conditions. 

  4. Information Needed to Establish a Framework for the Project

    The following email was sent by Sterling Laylock to Dhruvaraj Gambhire & Ali Feroz Khan.

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    We greatly appreciated the opportunity to meet with you today. Please find below the list of information we'll need to establish a detailed framework
    for our pilot project and pricing for full approval.

     

    We've also agreed to meet each Thursday at 4:00pm central time which will serve as our weekly meeting. There will be an exception
    to next week's meeting which will be held on Wednesday Nov 10th at 4:00pm.

     

    Building Site: Astronomy Building #0300

    Weekly Meeting Time: Thursday's 4:00-5:00pm Central

    Tasks Prior to Test Date:

    1. Test Site Floor Plan Analysis
    2. Determine Test Site Design
    3. Develop Project Protocols
    4. Establish Sampling Method
    5. Select Sampling Types, Origin Points + Intervals

    Tasks Post Test Date:

    • Lab Testing
    • Data Reporting
    • Recommendations
    • Business Case Analysis

     

    DATA and QUESTIONS: 

    Required items are highlighted in BLUE**) [note the color is not displayed on the icap portal, instead the items are starred (**)]

    Additional items are necessary, however they can be addressed later in the project timeline.

    1.     Please provide PDFs of the full floor plan layout drawings for the entire building. Be sure to include 
    square footage for each room and common areas. It is also very important to identify operable windows, if any? ** 
    (current/anticipated occupancy assumptions would be helpful)

    2.     What are the Astronomy Building's normal hours of operation? **

    3.     What is the air filtration rating for the spaces? MERV :: HEPA

    4.     Make/Model, age, specs and replacement/upgrade history of the existing HVAC system?

    5.     Make/Model and full specifications of the portable air purifiers expected to be used or are
    being used in the building.

    6.     Please identify all HVAC zones in drawings.

    7.     How many air-changes per hour is the HVAC system currently providing?

    8.     What are the basic assumptions for outside air intake to aid in dilution/ventilation for all interior spaces.

    9.     Please include weather assumptions for heating and cooling the interior spaces along with outdoor temperature and humidity estimates.

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