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
SITE Buildable Site Created by Dredged Canals Dredged Canals provide water access and views to sound Narrow southern exposure
SITE DESIGN GOALS 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 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
Architectural Response to Site Respond to Views of Water
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
Geothermal HVAC System 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 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
Original Design Concerns Wells penetrated three aquifers Possible Contamination from brackish waters Possible Increase in Aquifer Temperature Primary Water Supply for could be compromised
LOWER PRINCIPAL FRESH WATER AQUIFER YORKTOWN SALT WATER AQUIFER 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
OPEN LOOP DESIGN SOLUTIONS 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
BORROWED WATER GEOTHERMAL DESIGN
BORROWED WATER GEOTHERMAL DESIGN
Geothermal HVAC System 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
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