Morgan Heater, P.E., BEMP, LEED AP .com
Theater In The Round Underground
Client Goals: 1. Silent 2. Hidden 3. Comfortable 4. Energy Efficient Challenges: 1. Variable Occupancy 2. High Occupant Densities 3. High Lighting Power Densities (100kW) 4. Connected Indoor/Outdoor Spaces 5. High Usage 3 of 18
1. High Performance Envelope 2. Ground Loop HX with water to Air Heat Pumps. 3. Heat Recovery (DOAS) 4. Delta-T variable pumping 5. Economizers 6. Below-grade Ductwork Displacement Ventilation 7. Structural Integration 8. Occupancy Sensors 4 of 18
Decoupled ground loop pumping 5 of 18 Dedicated Heat Pump pumping.
• Comfortable & Quiet • 35 kBtu/SF Actual • 64% savings over typical theater project • Low maintenance Costs 6 of 18
Net-Zero Community Center
Client Goals: 1. Net-zero 2. Low-cost 3. Comfortable Challenges: 1. Variable Occupancy 2. Commercial Kitchen (100 meals/day) 3. High Usage 8 of 18
1. Central Dedicated Outdoor Air System (DOAS) 2. Demand Controlled Ventilation (CO2) 3. Variable Capacity Air-Source Split System Heat Pumps (Ductless) 4. Heat pump pre-heat for Domestic Hot Water 9 of 18
1. Right Sized Ventilation 2. HVAC sized for heating 3. Heat pump DHW Pre-heat 4. $17/SF Mechanical Budget 10 of 18
DHW Preheat (110 F), Electric Finishing 11 of 18 Local stand-alone controls
90 85 100 People 80 150 People 200 People 75 250 People 300 People 70 350 People Tout 65 60 1 6 11 16 21 90 85 100 People 80 150 People 200 People 75 250 People 300 People 70 350 People Tout 65 60 1 6 11 16 21
• Stack driven natural ventilation • Occupancy peaked served by natural ventilation • Base occupancy served by DOAS unit with ERV • Demand control on ventilation 13 of 18
Actual Production per Month (kWh) 30000 25000 20000 15000 10000 5000 EUI Before Solar: 38 kBtu/SF/yr 0 Last 6 Months Before Solar: 20 kBtu/SF/yr 1 2 3 4 5 6 7 8 9 10 11 12 EUI After Solar: 12 kBtu/SF/yr Predicted Solar Actual Production Last 6 Months After Solar: -6 kBtu/SF/yr Total Consumption per Month (kWh) 30000 What went wrong: 25000 1. HVAC Maintenance Contractor Changed things. 20000 2. The building is so nice that everyone 15000 wants to have events there. 10000 5000 0 1 2 3 4 5 6 7 8 9 10 11 12 Total Consumption Modeled Consumption 14 of 18
Most Efficient K-8 School in the nation?
Client Goals: 1. Low cost 2. Student comfort 3. Energy Efficiency Challenges: 1. Remodel of existing building 2. Tight budget 16 of 18
1. Distributed Dedicated Outdoor Air Systems (DOAS) 2. Demand Controlled Ventilation (CO2) 3. Variable Capacity Air-Source Split System Heat Pumps (Ductless) 4. Heat pump pre-heat for Domestic Hot Water 17 of 18
AFT FTER BE BEFORE 1. Classroom ERVs 2. Ductless Indoor Units 3. Ceiling Fans for Distribution 4. Occupant based control 5. Hybrid ventilation BEFORE BE AFTE AFTER 18 of 18
50 43 43.5 Benchmark Ene Be Energy Use e 40 Comparison (kBTU/sf/yr yr) 30 23 23 19 19 20 14 14 10 0 Typical Seattle Baseline Westside Westside School model Model Actual Bills 50 Old ld vs. s. New Sch School Ene Energy Use se 40 Comparison (kBTU/sf/yr yr) 30 20 10 0 Original New Westside Westside School School Other Uses HVAC 14 kBtu/sf/year – Net Zero Ready! 19 of 18 $13/SF HVAC installed cost
• Envelopes are important, but HVAC is where the energy is. 1 st Step is to select a system that can be • turned off • 2nd Step is to “right - size” • Net-zero ready can be cheap • Heat pump DHW heating can be implemented cost effectively. • DOAS systems do not require tempering if careful attention is paid to HX selection .com 20 of 18
Morgan Heater, P.E., BEMP, LEED AP 206 . 596 . 4709 direct morgan@ecotope.com .com 21 of 18
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