Building F, Algonquin College Retrofit
- olalekan aboderin
- Feb 19, 2020
- 5 min read
Updated: May 8, 2020
FOOD CENTER WITH MEETING AREA
Professor: Prof. Woytek Kujowski
ALGONQUIN COLLEGE
WINTER 2020
Writer: Olalekan Aboderin
Co-writer: Adithya Purushothaman
Introduction
The purpose of this Project is to retrofit & redesign the existing F Building of the Algonquin College, in the highest sustainability standards in order to improve the energy efficiency and meet a zero framework. Currently, the one story building is occupied by offices.
The F building is located in Navaho Drive, Woodrofe Campus, Ottawa. Next to this building, on the North-East side is located the Residence and Conference Center building. On the North-West side of the F building, is located the parking spots for the office employees. It has also a direct public transportation access as it is just in the front of the building.
Site Perimeter – 449.53 sqm
Site Area - 10,417.22 sqm
Building Area – 1,184 sqm
Parking - 200 spaces
DESIGN PROGRAM
Rental unit of 110 SQM
Kitchen
Brand Outlets
General eating area
Wash rooms
Storage Spaces
Meeting zone
STEPS AND GOALS TOWARDS NET-ZERO
• The first step is to create the most efficient building envelope including slab, roof, and openings.
• The second step is to size proper mechanical equipment to service the interior space
• The goal is to create a relationship between the building envelope and mechanical equipment that will allow for renewable energy to be an energy producer that can generate profitable energy.
Methodology
Sefaira 2030 Palette
Out of the recommended strategies to achieve a net zero building we shall be looking to incorporate the following:
•Form for day-lighting
•High insulation
•Glazing u-factor
•Passive light & heat – skylights
•Managing internal loads – light fixture selection
•Managing internal load – efficient equipment
•Passive cooling - double roof
LEED
LEED Strategies that can be incorporated to the design process
Site development - The site is almost 100% buildings and hard surfaces. The new project is similar but have a green roof and some new landscaping to mitigate habitat, groundwater and micro-climate effects.
Re-use of existing structures and materials - primarily an adaptation of the existing bldg. with a green new roof, internal walls will be salvaged and reused where applicable.
Thermal comfort - Solar control to reduce overheating is will be achieved by selective glazing and window and shading device design.
Existing heavy steel structural framing will be fully retained.
FLOOR PLAN
3Dviews
Materials
INTERIOR FINISHES
For our selection of materials, we use Low VOC materials (have reduced amounts of volatile organic compounds) that can be sourced locally
WALLS - Milk Paint - It contains no synthetic or petroleum-based ingredients and is, zero VOC.
WINDOWS - Fiberglass Windows – FENPLAST
FLOORS - Ceramic Tiles –CERATEC SURFACES, Cork Board –JELINEK CORK GROUP
ENVELOPE ASSEMBLIES
Wall (Exterior)
Old wall 150mm
TYVEK membrane
sheathing
Cellulose cavity insulation
150mm stud wall
TYVEK membrane
Gypsum board & render
Wall (Interior)
Gypsum board & render
TYVEK membrane
Cellulose cavity insulation
150mm stud wall
TYVEK membrane
Gypsum board & render
Window
Timber frame
Fiberglass glazing
(8/16/8 insulated glazing)
Green Roof
100mm drainage mat
EPDM membrane
100mm insulation
25mm OSB panel
300x60mm Battens
Gypsum board & render
Floor
30mm spruce floor boards
Vapour barrier
120x80mm joists
220mm cellulose insulation
Sealing membrane
Floor
16mm plywood finish on 38x38mm battens
Location: Meeting Area
BILL OF MATERIALS REPORT
WALL DETAILS
ROOF DETAILS
SKYLIGHT DETAILS
ENVELOPE RETROFIT
Base Model
Maintaining existing openings with no additions windows
Analysis shows,
91% of the floor area being underlit, this results in an increased demand in lighting Energy.
The Energy demand graph shows 60,2017kWh/yr of heating energy required per year.
Upgraded Base Model
OPTION A
Maintaining existing openings
Focusing on envelope performance- Layout redesign for food center function & Addition of new windows
Analysis shows,
84% of the floor area being underlit, This results in an increased demand in lighting Energy.
The Energy demand graph shows 61,721kWh/yr of heating energy required per year.
Daylighting visualization (below to the right corner)
shows that there is lack of daylight penetration into the inner areas of the building envelope, this zone aligns with the major functional space of the redesign. This zone will require increased artificial light usage
OPTION B
Maintaining existing openings, Focusing on envelope performance, Layout redesign for food center function & Addition of new windows and skylights.
Analysis shows,
The Energy demand graph shows 60,889kWh of energy required per year.
Daylighting visualization (chart below)
shows that there is increased of daylight penetration into the inner areas of the building envelope, creating a well lit major functional space of the food center.
Generally, the main social areas possess sufficient lighting.
Energy Optimization
OPTION A
HVAC – VAV Return Air Package
Operational time – 7 days per week
Heating hot water source – Gas fired boiler
Walls – u-value 0.51
Floors – u-value 0.32
Roof – u-value 0.6
No shading
In this option, the Annual Energy use intensity is 250kWh/sqm/yr and Energy cost is $29,928, but comes at a cost of a very poorly lit building envelope. The building functions as a restaurant and requires to be lit which improves the comfort level of its users. This option may be cost effective but doesn’t perform well for its proposed function.
OPTION B
HVAC – Radiant Floor
Ground Source Heat Pump
Displacement Ventilation
Operational time – 7 days per week
Heating hot water source – Vertical water loop 80m
Walls – u-value 0.15
Floors – u-value 0.15
Roof – u-value 0.15
No shading
In this option, a combination of various HVAC system with the aim of achieving energy efficiency. The HVAC systems include Radiant floor, Ground source water heat pump & HRV. The combination of these systems creates a significantly reduced
Annual Heating Energy of 22 kWh per sqm,
Annual Gas use of 13,160 kWh,
EUI of 180.7 kWh/sqm/yr &
HVAC Energy per Unit area of 78.7kWh/swm/yr
Along with a well illuminated envelope. This option has achieved energy efficiency.
CONSERVATION & RENEWABLE ENERGY
Water Management
GRAF Carat S 1700 Gallon Underground Tank
Company: RainHarvest Systems LLC.
location: USA
CALCULATING SAVINGS
TOTAL= roof area * average annual rainfall * 0.8
= Gallons/SQM
= 613*868mm*0.8
= 13,060.94 Gallons/SQM/yr
Material Re-use
Window Schedule
16 of the existing windows are retained in their various locations on the building
envelope.
Additional, 20 windows are introduced in order to improve the envelope performance
Door Schedule https://www.cdfdistributors.com/
19 of the existing internal doors can be reused as internal doors in the new development.
Total length of internal walls removed from existing structure - 93m
Total length of new walls required
360mm Exterior – 16.3m
150mm Interior – 58m
The remaining 35m of wall can be in nearby sites as construction waste.
Door Size – 1200x2100 mm
Commercial Security Steel Door Description - 18 Gauge A40 Galvaneal Door - Interlocking Edge Seam with square hinge and beveled lock edge - Fire rated options - Non rated, 20 minute, 45 minute, 60 minute, 90 minute, and 3 HR - Fire rated insulated glass available
Total nos: 4
Door Size – 2000x2100mm
Commercial Glass Storefront Double Doors
Description
10" Bottom Rail Standard (Meets National Codes) 4 1/2" Flush Mount Frame - Standard 1/8" Extruded Aluminum ASTM Approved
Total nos: 8
Interior Solid Core Commercial Wood Doors
Thickness - 1-3/4" (20 minute fire rated) - One piece, clear, matching/compatible hardwood face laminated, SCL back, for painting or staining - Core - Wood particleboard door core to meet or exceed American National Standard ANSI/A208.1 for 1-LD-1 or 1-LD-2 door core
Total nos: . 22
Fiberglass Window https://www.andersenwindows.com/windows-and-doors/windows/
•best-performing, most energy-efficient double-hung window
•Wood protected by fiberglass and Fibrex® composite material
SOLAR POWER - SUN SHADOW STUDY
This analysis shows us that the prescience of nearby structures doesn’t cast any significant shadow cover throughout the year across the surface area of the building and the site.
This gives a high potential of harvesting solar power on the building itself and the parking area.
This analysis shows us that an average of 1200Kwh of solar power can be harvested per year.
SOLAR POWER - DESIGN
Total energy consumption per square foot of a commercial building in Canada is 22.5kWh/SQF.
This analysis shows us that
•38 solar panels located on the roof the building covering 144SQM can produce 12.2kWp (12.2kWh) of power.
•107 solar panels located over adjacent carport shading system covering 475SQM can produce 34.2kWp (34.2kWh) of power.
Download Research PDF below
View Report PDF
Source of Information
Prof. Woytek Kujowski
Ph.D. Arch., LEED AP, MRAIC, iiSBE
Professor at Building Science and Green Architecture Programs
kujawsw@algonquincollege.com
Algonquin College | 1385 Woodroffe Avenue | Ottawa | Ontario | K2G 1V8 | Canada
Prof. Juan Gonzalo Soares
| M.Arch., CPHD, LEED Green Associate
Part-time teacher, Green Architecture Program + Architectural Technician/Technologist Program gonzalj1@algonquincollege.com
Algonquin College | 1385 Woodroffe Avenue | Ottawa | Ontario | K2G 1V8 | Canada
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