The first thing I did for my model this week was link the structural model into my architectural model and fix clashes (written in last week’s journal entry :D). I then went ahead and began modeling my HVAC system.
The first step for this was defining my spaces; I had to make sure that I indicated proper upper limits for each space as some spaces go up 15’ and others go up 30’. I then defined the space types for each space as follows:
- Olympic & NHL Ice — Exercise Area - Exercise Center
- There are no ice rink space types, so I chose this one as the skaters’ metabolic activity on the ice would be similar to people exercising in an exercising center. I did, however, change the cooling set point to 55ºF and the heating set point to 50ºF. These numbers were decided based off this article.
- Lobby — Lobby
- Stairs — Stairway
- Locker Room — Dressing/Locker/Fitting Rooms - Exercise Center
- Restroom — Restrooms
- NHL Bleachers — Audience/Seating Area - Gymnasium
- Zamboni Room — Active Storage
- Mechanical Room — Electrical/Mechanical
- Storage — Inactive Storage
- Office — Office - Enclosed
- Hallway — Corridor/Transition
- Gym — Exercise Area - Exercise Center
- Cafe — Food Preparation
- Open Workspace — Office - Open Plan
- Dance Studio — Exercise Area - Exercise Center
- Olympic Viewing Area — Audience/Seating Area - Gymnasium
I also changed the condition types so that most spaces on the first floor were only vented, the rinks were only cooled, and spaces on the second floor were both heated and cooled. This is because I anticipated that the main load would be cooling the ice surfaces spaces, so I do not want to put more load on the cooling system but heating adjacent spaces on the first floor.
I also adjusted all the schedule settings to Office Lighting - 6AM to 11PM and adjusted the factors. This is because ice rinks operate from very early in the morning to very late at night.
I did make an exception for the Level 2 offices and hallway, which was set to the lighting schedule of Common Office Occupancy - 8 AM to 5 PM.
I used Split System(s) with Mechanical Ventilation with Cooling for all the zones. I then lined my spaces into zones as such:
Here is the resulting analytical report:
I then set the specified supply airflow for each space as equal to the area, which I got from the space schedule (column D above).
I then placed the air terminals, all 13’ from floor level. Below is the specification for how many air terminals I placed in each space and their supply cfm. For the Floor 1 supply air terminals, I placed 2 AHU’s (one servicing 10,000 CFM and the other servicing 5,000 CFM) in the mechanical room. For Floor 2, I knew that the ice rinks and workspace would need a big AHU as there’s a lot of terminals with 2000 cfm, so I placed 3 Outdoor AHU systems on the roof to service each space and some of the surrounding terminals in the viewing area and dance studio. For the offices, hallway, gym, and cafe air terminals, I placed a smaller AHU outside the offices.
I HAD MANY CHALLENGES THIS WEEK! I received many errors when trying to define my space type and I am also not sure if my analytical report is accurate because of possible things I might’ve overlooked in the process. I received a lot of help from Glenn, but I think I need more help 😀🥲🤣. Another challenge was determining where to put my air terminals because the ice rink spaces were so large in area so they need more supply air, so the terminals had to service a bigger cfm demand.
Anyways, here are some bonus pictures of a forreal air-supply duct system in an ice rink from my skate session this morning (an excursion!). They are very big! Wow!
