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Team IES - 2016 ASHRAE Lowdown Showdown

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Team Insane Energy Savers (IES) were awarded the most Innovative Workflow at the ASHRAE Lowdown Showdown energy modeling competition at SimBuild 2016.

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Team IES - 2016 ASHRAE Lowdown Showdown

  1. 1. 2016 ASHRAE LowDown Showdown Modeling Challenge SimBuild 2016 Conference Insane Energy Savers (IES) Team Kent Beason Joanne Choi Cory Duggin Alexandra Gramling Ken Griffin Amy Jarvis Shona O’Dea Igor Seryapin Irina Susorova Tristan Truyens Brian Tysoe Scott West Xiangjin Yang
  2. 2. 2016 ASHRAE LowDown Showdown Modeling Challenge Project description - 40,496 ft2, 3-story Outpatient Health Care facility1 - Baseline Building Modeling Specifications - Maximum 10,000 ft2 of roof area for photovoltaic or solar thermal systems. - TMY3 weather data and local utility rates (natural gas, electricity, and water) for Omaha, Nebraska. - Carbon emissions factors from Standard 189.1-2014 (provided in the Challenge Resource section) to calculate carbon equivalent savings. 1 LDSd building modeling requirements are based on the 90.1-2010 Outpatient Health Care reference building: www.energycodes.gov/development/commercial/90.1_models Guidelines
  3. 3. 2016 ASHRAE LowDown Showdown Modeling Challenge Team’s Approach - Divided design/modeling tasks based on team members’ individual strengths. - Selected realistic assumptions and strategies specific for Climate Zone 5A. - Used ASHRAE resources (Advanced Energy Design Guides and ASHRAE Research Project 1651). The Team
  4. 4. 2016 ASHRAE LowDown Showdown Modeling Challenge Energy Metrics - Site EUI: 61.9 kBtu/ft2 - Source EUI: 194.5 kBtu/ft2 - Cost per ft2: $0.93 - Annual electricity use: 2,989,983 kBtu - Annual water use: 408,373 gal - Annual cost: $42,979 + $1,859 - Energy production: 3,335,310 kBtu Project Description // Executive Summary Northeast SoutheastNorthwest
  5. 5. 2016 ASHRAE LowDown Showdown Modeling Challenge Energy Conservation Measures (ECM) 1. Building shape strategies based on characteristics of Climate Zone 5A and geographic specifics of the site location (Omaha, NE) 2. Envelope strategies 3. Lighting/Daylighting strategies 4. Natural ventilation strategies 5. Plug load reduction strategies 6. HVAC systems strategies 7. Renewable energy generation on site List of Measures & Strategies
  6. 6. 2016 ASHRAE LowDown Showdown Modeling Challenge Climate Analysis Omaha, NE - Climate Zone 5A (cool-humid) - Maximum temperature 106ºF DB - Minimum temperature -22ºF DB - Predominant wind direction: SSE-NNW - Annual mean wind speed: 9.4 mph Temp. distribution Summary metrics Wind rose (May)
  7. 7. 2016 ASHRAE LowDown Showdown Modeling Challenge a. Use Common Sense! 1. Building Shape Strategies
  8. 8. 2016 ASHRAE LowDown Showdown Modeling Challenge b. Compact Shape - Minimize building envelope exposure to reduce heating gain and loss. - Re-design floor layouts to fit the compact shape. - Locate high-internal gain spaces along north façade for passive heating in winter. - Place auxiliary spaces (stairs, elevators, storages) along East/West facades to serve as thermal buffer zones. 1. Building Shape Strategies
  9. 9. 2016 ASHRAE LowDown Showdown Modeling Challenge Atrium Corridors/Stairs Lobby/Reception Cafeteria Office/Conf. rooms Lounge Medical Procedure Rooms Exam rooms Medical auxiliary Storage/Restrooms/Lockers MEP/Utilities 2nd floor - Admin 1. Building Shape Strategies 1st floor - Critical 3rd floor - Admin c. Updated floor layout
  10. 10. 2016 ASHRAE LowDown Showdown Modeling Challenge d. Two-story Atrium - Serves as a main circulation space on the 2nd and 3rd floors. - Provides daylight and natural ventilation to perimeter zones. - Atrium skylight roof sloped at optimal angle for PV arrays placement (7.6°). 1. Building Shape Strategies
  11. 11. 2016 ASHRAE LowDown Showdown Modeling Challenge e. Glazing Placement and Area - South wall (WWR 44%): glazing for passive solar heating in winter. - North wall + Skylight (WWR 35%): glazing for daylighting. - East/West walls (WWR 12%): minimize glazing to avoid direct solar heat gain. - Total (WWR 31%). 1. Building Shape Strategies
  12. 12. 2016 ASHRAE LowDown Showdown Modeling Challenge f. Building Orientation and Shading - Develop building along East-West axis to reduce direct solar heat gains. - Rotate building -20° (NNW) for optimal wind exposure. - Floor overhangs on the south façade (7’ deep) for self-shading in summer. - External shades on the north façade to shade from evening sun from the west. 1. Building Shape Strategies January 15th, 12 pm July 15th, 12 pm
  13. 13. 2016 ASHRAE LowDown Showdown Modeling Challenge Glazing construction Envelope properties selected based on ASHRAE’s Advanced Energy Design Guides and actual manufacturers’ products. - Double-pane Krypton-filled glazing with Low-e film + Fiberglass framing - Glazing thermal performance: U-0.14; SHGC-0.27; VT-0.44 2. Envelope Strategies ecobuildingstore.ca
  14. 14. 2016 ASHRAE LowDown Showdown Modeling Challenge Opaque construction - Insulated metal panel exterior walls: R-13 cavity + R-23 cont. insulation (gel insulation); U-0.294 - Roof with R-64 cont. insulation above deck (gel insulation); U-0.015 2. Envelope Strategies -3% -2% -3% HEATING ENERGY COOLING ENERGY HEATING + COOLING… Envelope Insulation (kBtuh/sf F) Energy Savings ASHRAE Exterior Wall - 1.75" - U-Value = 0.0634 Roof Insulation - 4" - U-Value = 0.0481 Flooring Insulation - 9" - U-Value = 0.0375 Thermablok Aerogel Insulation Exterior Wall - 1.75" - U-Value = 0.292 Roof Insulation - 4" - U-Value = 0.0151 Flooring Insulation - 9" - U-Value = 0.009
  15. 15. 2016 ASHRAE LowDown Showdown Modeling Challenge Lighting - LPD reduced by 75% Daylighting - All perimeter spaces - Atrium north-facing skylight - Interior clerestory windows facing atrium - Spatial daylight autonomy analysis to verify adequate daylighting and to determine ideal VT for each orientation 3. Lighting/Daylighting Strategies Daylight intensity (fc), Sep 21, 15:00 Sunny day
  16. 16. 2016 ASHRAE LowDown Showdown Modeling Challenge Natural Ventilation through Operable Windows - 73% operable windows - Placed in perimeter zones on the 2nd and 3rd floors, in the atrium skylight, and the clerestory windows facing the atrium 4. Natural Ventilation Exterior view Aug 19, 12:30 Air flow (cfm) Wind speed: 4.03 mph Wind direction: 245° Air temperature: 73°F Atrium interior view Aug 16, 20:30 Air flow (cfm) Wind speed: 6.38 mph Wind direction: 140° Air temperature: 80°F
  17. 17. 2016 ASHRAE LowDown Showdown Modeling Challenge Plug Load Reduction - Reduce total building plug load from 1.61 W/ft2 to 1.18 W/ft2 using Building Area Method for Medical Buildings and Clinics (Source: COMNET by New Buildings Institute) - Energy savings of 27% 5. Other Strategies illinoisgoc.com
  18. 18. 2016 ASHRAE LowDown Showdown Modeling Challenge Systems - Individual systems for the Critical, OR, and Admin zones. Semi-heated stairs. - Ventilation provided by a DOAS. - Cooling and Heating provided by a water- cooled, ground-coupled VRV system. - Cooling capacity: 208 tons. - Heating capacity: 630 MBH. - Efficiencies: 4.2 heating COP / 3.5 cooling COP. 6. HVAC Strategies
  19. 19. 2016 ASHRAE LowDown Showdown Modeling Challenge Earth Tubes Designed for heat recovery ventilation of the 1st-floor system using heat exchange with the earth. Assumed constant ground temperature is 53°F, total earth tube length is 538’, cross section is 6’x 6’. 6. HVAC Strategies Entering outdoor air temperature (°F)
  20. 20. 2016 ASHRAE LowDown Showdown Modeling Challenge Transpired Solar System Designed for heat recovery ventilation of the 2nd- and 3rd-floor systems using solar energy. Located on the south face of the atrium skylight. 6. HVAC Strategies sbec.eu.com Entering outdoor air temperature, Jan 4th (°F) 30°F ΔT 30°F ΔT
  21. 21. 2016 ASHRAE LowDown Showdown Modeling Challenge PV-generated Electricity - 10,000 ft2 of PV monocrystalline cells (19.6% efficiency) on the atrium roof - Parametric runs used to determine the optimal angle of inclination (34°) - Generation power: 186 kW (633 kBtu) - Annual energy generated: 273,200 kWh (932,400 kBtu/h) 7. Renewables 17,729 16,921 23,400 23,816 28,277 27,730 28,344 26,613 24,901 22,819 17,376 15,359 - 5,000 10,000 15,000 20,000 25,000 30,000 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec PV Generated Electricity (kWh) theenergycollective.com
  22. 22. 2016 ASHRAE LowDown Showdown Modeling Challenge Wind-generated Electricity - Five (5) 70 kW wind turbines - Generation power: 350 kW (1,194 kBtu/h) - Annual energy generated: 704,208 kWh (2,402,857 kBtu) 7. Renewables inerjy.com nrel.gov
  23. 23. 2016 ASHRAE LowDown Showdown Modeling Challenge Energy Use by Category Energy Performance - Heating: 117,855 kBtu - Cooling: 404,916 kBtu - Int. lighting: 664,225 kBtu - Ext. lighting: 60,990 kBtu - Equipment: 1,405,130 kBtu - Fans: 179,002 kBtu - Pumps: 32,095 kBtu - SHW heating: 125,771 kBtu
  24. 24. 2016 ASHRAE LowDown Showdown Modeling Challenge LDSD Project Summary Results – Questions/Comments? Annual energy use by category (MBtu) LDSd Results Summary Baseline Proposed Total Energy Usage (kBtus) 7,970,901 2,989,983 Site EUI (kBtu/sf) 165.1 61.9 Source EUI (kBtu/sf) 355.8 194.5 Annual Electricity Usage (kWh) 1,260,019 876,314 Annual NG Usage (Therms) 36,717 0 Annual Water Usage (Gallons) 408,373 408,373 Annual Electricity Cost (US $)* $108,198 $42,979 Annual NG Cost (US $) $2,804 $0 Annual Water Costs (US $) $1,859 $1,859 Total Annual Costs (US $)* $112,861 $44,838 CPSF (US $/sf) $2.34 $0.93 Total Energy Generation (kBtus) 0 3,335,310 Net Zero Energy 7,970,901 (345,327) Carbon Equivalent 2,267,412 1,215,448 *Does not include selling renewable energy back to the grid
  25. 25. 2016 ASHRAE LowDown Showdown Modeling Challenge Thank You – Questions/Comments?

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