Morgan Heater, P.E., BEMP, LEED AP .com Theater In The Round - - PowerPoint PPT Presentation

Morgan Heater, P.E., BEMP, LEED AP

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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

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Decoupled ground loop pumping Dedicated Heat Pump pumping. 5 of 18

• Comfortable & Quiet
• 35 kBtu/SF Actual
• 64% savings over typical theater

project

• Low maintenance Costs

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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 Local stand-alone controls 11 of 18

60 65 70 75 80 85 90 1 6 11 16 21 100 People 150 People 200 People 250 People 300 People 350 People Tout 60 65 70 75 80 85 90 1 6 11 16 21 100 People 150 People 200 People 250 People 300 People 350 People Tout

• Stack driven natural ventilation
• Occupancy peaked served by natural

ventilation

• Base occupancy served by DOAS unit with

ERV

• Demand control on ventilation

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EUI Before Solar: 38 kBtu/SF/yr Last 6 Months Before Solar: 20 kBtu/SF/yr EUI After Solar: 12 kBtu/SF/yr Last 6 Months After Solar: -6 kBtu/SF/yr What went wrong: 1. HVAC Maintenance Contractor Changed things. 2. The building is so nice that everyone wants to have events there. 14 of 18

5000 10000 15000 20000 25000 30000 1 2 3 4 5 6 7 8 9 10 11 12

Total Consumption per Month (kWh)

Total Consumption Modeled Consumption 5000 10000 15000 20000 25000 30000 1 2 3 4 5 6 7 8 9 10 11 12

Actual Production per Month (kWh)

Predicted Solar Actual Production

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

17 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

1. Classroom ERVs 2. Ductless Indoor Units 3. Ceiling Fans for Distribution 4. Occupant based control 5. Hybrid ventilation 18 of 18

BE BEFORE BE BEFORE AFT FTER AFTE AFTER

14 kBtu/sf/year – Net Zero Ready! $13/SF HVAC installed cost

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43 43.5 23 23 19 19 14 14 10 20 30 40 50 Typical Seattle School Baseline model Westside Model Westside Actual Bills 10 20 30 40 50 Original Westside School New Westside School Other Uses HVAC

Be Benchmark Ene Energy Use e Comparison (kBTU/sf/yr yr) Old ld vs.

• s. New Sch

School Ene Energy Use se Comparison (kBTU/sf/yr yr)

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• Envelopes are important, but HVAC is

where the energy is.

• 1st 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

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Morgan Heater, P.E., BEMP, LEED AP 206 . 596 . 4709 direct

morgan@ecotope.com

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