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Journal Entry For
Module 9 - HVAC Systems
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Created
Feb 21, 2024 1:11 AM
Last Edited
Feb 28, 2024 8:03 PM
Created by
Jake
Your Design Journal entries for this module should highlight your design thinking and analysis results that influenced your decisions about:
- your overall HVAC system strategy
- your heating strategy and how you implemented it in your design
- your cooling strategy and how you implemented it
- any special HVAC system challenges that you encountered
- create overall strategy
- heating and cooling on each floor
- HVAC air heating and cooling
- radiant cooling ceilings
- most worried about heat coming in in the heating days so this will help combat the greater surface area in the building
- radiant heating floors
- zoning:
- each level is a zone to increase functionality and optimize heating/cooling
- each level has unique sun exposure/function combination
- modularity in design
- each level has a repetitive plan to lower material, construction, maintenance, and replacement costs and impacts
- polished envelope by adding exterior doors
- added spaces and tags to rooms
- create zones
- choosing VAV single duct for all zones
- run load report, below:
![image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fc9309505-badd-417b-9f36-8d458a986009%2Fe93772ff-c5dc-4853-a156-4a6f1908d4f6%2FUntitled.png?id=e6cb85ff-493c-479a-b9ae-bb6763a6bb32&table=block)
Determine biggest losses:
Lobby
![image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fc9309505-badd-417b-9f36-8d458a986009%2Fe361b932-8fd1-4d43-a80c-14bf9e5204e5%2FUntitled.png?id=eda4c555-2857-4860-a3fa-fe0ebee79df5&table=block)
- 7% through windows
Foyers
![image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fc9309505-badd-417b-9f36-8d458a986009%2Fcd68ad39-7f28-4084-9e78-dd2d4cae33a5%2FUntitled.png?id=dd49e5c9-001e-47a8-8d46-7567c1df19cd&table=block)
- 38% through walls
- 23% through windows
Ex-Ed
![image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fc9309505-badd-417b-9f36-8d458a986009%2Fce3c1ea4-0426-49cb-a169-d2158135a308%2FUntitled.png?id=a1383f54-424d-49a9-a47e-e637bf649722&table=block)
- 15% loss across windows
Office
![image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fc9309505-badd-417b-9f36-8d458a986009%2F4160e175-7304-4527-a85a-c9f956a060a1%2FUntitled.png?id=52fb68a7-f2a4-4d90-a548-32be88800258&table=block)
- 42% loss through windows
Restaurant
![image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fc9309505-badd-417b-9f36-8d458a986009%2F012fbbb2-e13a-4d6d-99fb-5ffeefa7e990%2FUntitled.png?id=ea2fec23-b526-4eb3-ac1b-f38f7fa52a1a&table=block)
- 21% loss through windows
Original calculated loads:
![image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fc9309505-badd-417b-9f36-8d458a986009%2F660f9994-7188-4429-be9a-95002908f6b2%2FUntitled.png?id=247fe1c4-b761-40ba-bc13-e47faacc6b3a&table=block)
Improve window thermal resistance in heating load schematics gives new load report:
![image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fc9309505-badd-417b-9f36-8d458a986009%2Ff1b58f7d-751c-4542-87b3-3751f676082e%2FUntitled.png?id=5b29f17d-eb4a-462d-b9c4-84a578fe255a&table=block)
- can be seen that the total heating/cooling loads decrease from original
Final load report:
![image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fc9309505-badd-417b-9f36-8d458a986009%2Fbc74ce48-4e8e-4c50-8a96-6cc4f8eaba17%2FUntitled.png?id=6880ef43-b731-405a-bdbe-4b38a497c41a&table=block)
Now that we have load report, determine placement/quantifty of air handlers + terminals on each floor based on calculated supply (cooling-dominated loads)
- Foyers: 76 to 255 cfm = 1 air terminal in foyers on each level
- Restrooms: ~30 cfm = 1 air terminal
- lobby: 3206 cfm = requires 7 air terminals, 4000 cfm air handler provided for L1
- exhibit/education rooms: 1772 cfm requirement = provide 4 air terminals + 1x2400cfm air handler on ex-ed floors 2-4
- office: 721 cfm requirement = 2 air terminals + 1 air handler
- restaurant/kitchen: 2100 requirement = 5 air terminals + 1 air handler
- max duct size rqd on levels 2-6 = 18x24
- level 1 lobby requires 24x24 duct size for the larger load demand
Laid out ducts and temrinals as seen below, before sizing the ducts approproately
![image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fc9309505-badd-417b-9f36-8d458a986009%2F8e79d27d-c2f9-472b-b960-c6d0bddea6cc%2FUntitled.png?id=822b008d-00a4-4ac1-bbb7-0c190b645b4c&table=block)
![image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fc9309505-badd-417b-9f36-8d458a986009%2Fbd6b3045-21db-438f-8dbb-e4677065ed67%2FUntitled.png?id=a68986fd-cb49-4042-8d7b-ff3e4728a320&table=block)
sizing
- began by changing all direct terminal ducts to the 9x9 size, worked backwards from that point
after sizing:
![image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fc9309505-badd-417b-9f36-8d458a986009%2Ffa5b1743-bcb5-4b03-a691-d5b881eef598%2FUntitled.png?id=838d677c-5705-4850-a316-712dd592331d&table=block)
![image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fc9309505-badd-417b-9f36-8d458a986009%2F9066bcdf-d41b-4d7f-bae2-ab1880d024de%2FUntitled.png?id=d50ad0e1-b291-48aa-a360-226c675b2b85&table=block)
![image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fc9309505-badd-417b-9f36-8d458a986009%2Fb3a1436a-83ab-496b-9d66-8e0588b84e37%2FUntitled.png?id=9ac23e30-6842-450c-8eff-0b554e967813&table=block)
![image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fc9309505-badd-417b-9f36-8d458a986009%2F62b21f8a-beb4-478a-97ad-f6ff53b3b103%2FUntitled.png?id=ea582d14-9cb5-4d6b-8fcc-e95c2665541c&table=block)
![image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fc9309505-badd-417b-9f36-8d458a986009%2F17ce997e-10ef-4749-bc58-b3af124ba5eb%2FUntitled.png?id=d860bd03-41e9-441b-93db-0033fb11b342&table=block)
![image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fc9309505-badd-417b-9f36-8d458a986009%2F8d3b780e-f328-43b8-92e0-8e0430f1801e%2FUntitled.png?id=cdd026d7-a8f2-4513-a887-5328aa4fa1a2&table=block)
![image](https://www.notion.so/image/https%3A%2F%2Fprod-files-secure.s3.us-west-2.amazonaws.com%2Fc9309505-badd-417b-9f36-8d458a986009%2F8f2b3220-84d7-4d97-ac80-258cc6aaec78%2FUntitled.png?id=81776ce9-5cc8-4daf-8e5d-304deab3fa95&table=block)
notes
- module 4 in 220A to create views
- module 5 planning mechanicl spaces 220B
- run design coordination
- increase duct sizes to reduce friction
- challenges and lessons learned