Mayan riviera bpm samples 1

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  • This slide shows that heating is a large share of the energy use. Seoul is a cold place, with climate similar to NYC. However, the summers are hot because of which the cooling is an important aspect Also note the preceiptiation or rain data in the light blue bars. July and August observe heavy rainfall
    http://apps1.eere.energy.gov/buildings/energyplus/weatherdata/2_asia_wmo_region_2/KOR_Inchon.471120_IWEC.stat
    http://en.wikipedia.org/wiki/Seoul#Climate
  • YRG developed a baseline case energy model compliant with ASHRAE 90.1
    YRG developed a Proposed Design case energy model representing the actual project design with all Energy Efficiency Measures
    The model was able to estimate energy savings of the project relative to the ASHRAE baseline
    Utilizing energy costs of the project for the site, these energy savings translate to operational cost savings
  • YRG developed a baseline case energy model compliant with ASHRAE 90.1
    YRG developed a Proposed Design case energy model representing the actual project design with all Energy Efficiency Measures
    The model was able to estimate energy savings of the project relative to the ASHRAE baseline
    Utilizing energy costs of the project for the site, these energy savings translate to operational cost savings
  • This slide emphasizes the importance of energy cost on the analysis. Although heating is a large energy share in the building, (as in the left graph), lighting has higher energy cost because of electric rates. Thus, reducing heating loads may reduce our system size, and capital cost decrease, but it may not be as significant in long term operating savings.
  • Cooling is higher load than heating because of internal loads
    Aux is fans and pumps which are effected with ventilation strategy
  • Mayan riviera bpm samples 1

    1. 1. Super Tower Seoul, South Korea Energy Cost Analysis
    2. 2. Building Performance Modeling 1. Background (Climate Summary) 2. Energy Model Inputs and Results 3. Glazing Studies 4. Shading Studies 30% DD Phase Review
    3. 3. Background – Climate Summary Cooling 560 CDD Heating 2782 HDD Comfort Source: TMY2 Weather Data Annual Rainfall 53 inches
    4. 4. Total Annual Energy Total Annual Cost ASHRAE Baseline 266,212 MMBtus $6,416,198 Proposed Design 189,374 MMBtus $4,485,136 Energy/Cost Savings 76,838 MMBtus $1,931,062 Percentage Savings 28.9% 30.1% YRG developed a baseline case energy model compliant with ASHRAE 90.1 YRG developed a Proposed Design case energy model representing the actual project design with all Energy Efficiency Measures The model was able to estimate energy savings of the project relative to the ASHRAE baseline Utilizing energy costs of the project for the site, these energy savings translate to operational cost savings The energy model predicted return on investment of the project within 4 years of the project operations Energy Analysis Results   10 LEED Points
    5. 5. Total Annual Energy Total Annual Cost Energy/Cost Savings 76,838 MMBtus $1,931,062 Energy Analysis Results
    6. 6. Energy Analysis Results- Cost Savings Breakdown 30.1% The energy model determines energy savings in all aspects of the building, particularly in Ventilation and Heating systems
    7. 7. 38.7% 25.5% 26.2% Energy Cost Savings by Space Type The project consists of different space types The energy model was able to identify that the cost savings with energy efficiency would be more in the residential portion followed by the hotel and offices.
    8. 8. Background – Building Energy Picture Energy Use vs. Energy Cost BaselineProposed Baseline Proposed
    9. 9. Shading Analysis – Sun Path S E S E S N W N W
    10. 10. Shading Analysis – Solar Exposure 06:00 07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 06:00 07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec North-facing Façade(s) East-facing Façade(s) Higher Cooling Cost Glare Potential
    11. 11. Shading Analysis – Solar Exposure Summer Condition East and West façades  Impact: Direct and high altitude solar gains  Best Practice: Use shading screens, vertical fins East Facade West Facade
    12. 12. Shading Analysis – Solar Exposure Winter Condition All façades  Impact: Low solar altitude and desirable heat gain  Best Practice: Use low-e thermal glass, interior roller shades for glare protection
    13. 13. Glazing – Range of Performance- U value U-Value Sensitivity Test U-Value Btu/h-ft2 -°F Solar Heat Gain Co-efficient (SHGC) Visible Light Transmittance (VLT) U-0.35 0.28 0.45 U-0.30 U-0.25 U-0.20 U-0.15 I m p r o v e d I m p r o v e d YRG developed parametric models of glazing performance to identify energy and daylight impact
    14. 14. Glazing – Energy Cost to U value Proposed Case U Value: 0.29 Annual Building Energy Cost
    15. 15. Glazing – Spandrel Glass Performance (46.55% of wall area) Comparing Building Energy Cost 0.49% 0.61% YRG developed parametric models of spandrel glass performance to identify energy savings
    16. 16. Results  Changing shading property (SHGC) would be more valuable than moving to a triple glazed window  Improving the U-Value of spandrel glass can save an additional 0.5% in annual energy cost
    17. 17. Shading Fins – Range of Performance 1:4 1:3 1:2 1:1 Depth-to-Distance Ratios Vertical Fins As Designed 
    18. 18. Shading System Optimization- Solar Radiation Analysis 30% All Horizontal Shades 40% Combination All Vertical Fins 20%
    19. 19. Shading Fins – Range of Performance Depth-to-Distance Ratios Horizontal Fins Max Incline Condition 1 to 2.8 ratio Façade (~84°) Façade (~90°) Tower Interior Max Summer (75.9°)Max Winter (29.0°) Tower Interior Max Summer (75.9°)Max Winter (29.0°) Fin Fin Typical Condition 1 to 3.6 ratio
    20. 20. Shading Devices – Summer Heat Gain Comparison Cumulative Solar Exposure, Summer Season H-Fins + V-Fins West External Shading Screen Analysis 10% 40% 70% Screen Opacity ~55% opacity W screen comparable to H-Fins+V-Fins on N, E, S faces
    21. 21. Comfort Optimization- Daylight Analysis
    22. 22. Library Project Fort Collens, CO
    23. 23. Envelope Construction Cooling Plant Impact Unshaded, Fully Glazed Fully Shaded, Fully Glazed Fully Shaded, Partially Glazed YRG evaluated envelope systems for reduction in cooling peak demand
    24. 24. Shading Impact on Total Energy Use Total Energy Cooling Breakdown Solar Breakdown Other Consumption 85% Cooling 15% Solar 13% Conduction 2% Diffused 5% Direct Up to 8% (Shading)
    25. 25. Climate Wind Temperature Thermal Stress Site Concept Design Energy Analysis for Optimized Design Climate and Site
    26. 26.  Red is the warm temperature  Blue is the cold temperature  Inner circle are high and low temperature identifying coldest and hottest days  Green is comfort temperature and humidity Recommendations-  Explore natural ventilation and passive conditioning like night flushing in July and August Temperature and Humidity
    27. 27. HDD(64.4) = 6574.6 CDD(50.0) = 2900.7 The climate is 3 times more likely to need heating as cooling  Green bars are comfortable hours which allow passive strategies  The climate needs heating majority of the time.
    28. 28. Wind Direction Distribution % Jul Mar DecSep  Dec to Mar- North Winds  Mar to Jul- East Winds  July- Sep – Not too many winds  Sep- Dec- South winds
    29. 29. Daylight and Shading Study – Oriented on East-West Axis June 21st March 21st December 21st Daylight analysis found 33.6% area over 25 fc threshold
    30. 30. Building Loads Distribution of loads in order of high to low Heating Heat loss through walls and roof Ventilation load for distribution of hot air Infiltration into the building (assumed to be average per ASHRAE loads calculation) Cooling People generate heat (assumed to be 50 sf/p) Lighting generates heat Small equipment loads in computers Solar radiation Conduction through walls and roof Inflitration of cool air to outside
    31. 31. Preliminary Energy Analysis Energy Analysis Assumptions Building Type - College/University Built Area- 168,000 SF Floors Above Ground- 4 Envelope- ASHRAE 90.1 2007 Baseline Window Wall Ratio- 44% HVAC- Dual Duct VAV system Design Building Energy Use Intensity:- 93 kBTU/ft2 Average Building Energy Use Intensity- 120 kBTU/ft2 Proposed Building Carbon intensity - 46.59 lbCO2/ft2 Proposed Building Carbon emissions- 3913.1 tons CO2/yr Location: Denver/Stapleton Int`l Airport, Colorado (40.02N,105.28W) Climate file: DenverStapletonTMY.fwt Analysis Period: 01/Jan - 31/Dec

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