Post on 20-Feb-2018
WATER AS DESIGN INSPIRATION IN ARCHITECTURE AND ENGINEERING The Design of the UNC Coastal Studies Institute Don Kranbuehl, AIA, PE, LEED AP Associate, Clark Nexsen Lead Designer / Project Architect Avery Monroe, PE Lead Mechanical Engineer Project Team: Architects: Clark Nexsen Associate Architect: Cahoon & Kasten Civil Engineer: Albermarle and Associates Mechanical Engineer: RMF Engineering Structural Engineers: Stewart Engineering Landscape Architects: CLH Design
WATER AS DESIGN INSPIRATION IN ARCHITECTURE AND ENGINEERING IMPORTANCE OF NATURAL WATERS: CANALS AND CROATAN SOUND SURROUNDING WETLANDS SALT WATER FROM ATLANTIC OCEAN HURRICANES AND WIND DRIVEN RAIN BUILDING WATER SYSTEMS: RAINWATER SYSTEM STORMWATER SYSTEM GRAY WATER SYSTEM CONDENSATE WATER GEOTHERMAL WELL WATER
COASTAL STUDIES INSTITUTE • Research Building (50,000 sf), Marine Service Building (12,000sf) • Construction Cost for Campus - $22,000,000 • Future Phase: Residential Dorms – (14,000 sf)
Research Building – 52,000 SF • Seeking LEED Gold • Research Labs for Marine Archeology, Coastal Processes and Engineering • Teaching Classrooms and Labs • Administration and Research Offices
SITE • Outerbanks, NC, Roanoke Island • Croatan Sound • Historic Indian Site
SITE • Manteo, NC pop. 1400 • Surrounded by Wetlands and Marshes Preserve • Above Freshwater Aquifer for County Well Water
• Buildable Site Created by Dredged Canals • Dredged Canals provide water access and views to sound • Narrow southern exposure
SITE
• Protect surrounding wetlands and waterways • Capture views of sound and canals
SITE DESIGN GOALS
• Balance Cut and Fill • Minimize Footprint and Impervious
SITE DESIGN GOALS
• Balance Cut and Fill • Minimize Footprint and Impervious • Treat Stormwater on site
SITE DESIGN GOALS
• Balance Cut and Fill • Minimize Footprint and Impervious • Treat Stormwater on site • Treat all Wastewater on site
SITE DESIGN GOALS
• Balance Cut and Fill • Minimize Footprint and Impervious • Treat Stormwater on site • Treat all Wastewater on site • No Irrigation – All Indigenous Plants
SITE DESIGN GOALS
SITE ANALYSIS- Site set backs
N
SITE ANALYSIS- Buildable Area
N
SITE ANALYSIS- Natural Axis and Sun Path
N
SITE ANALYSIS- Summer and Winter Winds
N
SITE ANALYSIS- Stormwater
N
SITE ANALYSIS- Public Space Connector
N
SITE ANALYSIS- Building Zones
N
SITE DESIGN- Marine Service Building
N
SITE DESIGN- Research Building
N
SITE DESIGN- Residential Buildings
N
• Respond to Views of Water
Architectural Response to Site
Architectural Response to Site • Respond to Views of Water • Utilize Winds and Cross Ventilation
Architectural Response to Site • Respond to Views of Water • Utilize Winds and Cross Ventilation • Respond to 100 year flood plain
Architectural Response to Site • Respond to Views of Water • Utilize Winds and Cross Ventilation • Respond to 100 year flood plain • Capture Natural Light
Architectural Response to Site • Respond to Views of Water • Utilize Winds and Cross Ventilation • Respond to 100 year flood plain • Capture Natural Light • Harvest Rainwater
Architectural Response to Site
• Treat Wastewater on Site
STRUCTURE AND ENVELOPE DESIGN • Reinforced Concrete Structure
STRUCTURE AND ENVELOPE DESIGN • Reinforced Concrete Structure • Fibercement Rainscreen System with Continuous Rigid Insulation
STRUCTURE AND ENVELOPE DESIGN • Reinforced Concrete Structure • Fibercement Rainscreen System with Continuous Rigid Insulation • Spray Foam Insulation • LOW E Glass with Sunshading
Original Design Closed Loop System 300 Wells and Cooling Tower Modular Heat Pump VAV Air Handling Units VAV & CAV Terminal Units
Geothermal HVAC System
Original Design Closed Loop System 300 Wells and Cooling Tower Modular Heat Pump VAV Air Handling Units VAV & CAV Terminal Units
Final Design Open Loop System Utilizing Dare County Raw Water Modular Heat Pump VAV Air Handling Units VAV & CAV Terminal Units
Geothermal HVAC System
GEOTHERMAL HVAC SYSTEM • PUMPS • HEAT EXCHANGERS • PIPING
GEOTHERMAL HVAC SYSTEM • PUMPS • HEAT EXCHANGERS • PIPING
GEOTHERMAL HVAC SYSTEM • MODULAR HEAT PUMP CHILLER/HEATER
DESIGN PROCESS OF CLOSED LOOP HVAC Loads (Trane Trace) Chiller/Heater Based on Peak Simultaneous Demand
Five 50-Ton Modules Geothermal Well
Calculations Based on Actual Test Well Modeled in Trane Trace Used Excel Spreadsheet to Calculate Number of Wells & Depth of Wells
• Wells penetrated three aquifers • Possible Contamination from brackish waters • Possible Increase in Aquifer Temperature • Primary Water Supply for could be compromised
Original Design Concerns
• Wells penetrated three aquifers • Possible Contamination from brackish waters • Possible Increase in Aquifer Temperature • Primary Water Supply for county could be compromised
Original Design Concerns
“YORKTOWN” SALT WATER AQUIFER
“LOWER PRINCIPAL” FRESH WATER AQUIFER
• Open Loop with Three Supply Wells and Dump into Sound • Cost effective • Potentially damaging to sound and ecosystem
• Open Loop with Three Supply and Four Injection Wells
• Costly • High Maintenance • Could contaminate fresh water aquifer
• Open Loop System Utilizing Raw Water from Dare County
• First proposed by County as best protection for aquifer • Most energy saving option • Public Public Partnership with Memorandum of Understanding
OPEN LOOP DESIGN SOLUTIONS
“BORROWED WATER” GEOTHERMAL DESIGN
“BORROWED WATER” GEOTHERMAL DESIGN
Final Design
Open Loop System Utilizing Dare County Raw Water Modular Heat Pump VAV Air Handling Units VAV & CAV Terminal Units
RESULTS Energy Modeling Compared to ASHRAE 90.1 2007 Baseline 34% Energy Savings, 27% Energy Cost Savings 10 LEED Points
Geothermal HVAC System
THOUGHTS QUESTIONS DISCUSSION Don Kranbuehl, AIA, PE, LEED AP Associate, Clark Nexsen Lead Designer / Project Architect Avery Monroe, PE Lead Mechanical Engineer Project Team: Architects: Clark Nexsen Associate Architect: Cahoon & Kasten Civil Engineer: Albermarle and Associates Mechanical Engineer: RMF Engineering Structural Engineers: Stewart Engineering Landscape Architects: CLH Design
Thoughts Questions Discussion
THOUGHTS QUESTIONS DISCUSSION