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Your Name Your title and organization. E NERGY -10 Design Tool ENERGY - 10 to provide a tool that a designer will use routinely to guide his or her decisions.

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Presentation on theme: "Your Name Your title and organization. E NERGY -10 Design Tool ENERGY - 10 to provide a tool that a designer will use routinely to guide his or her decisions."— Presentation transcript:

1 Your Name Your title and organization

2 E NERGY -10 Design Tool ENERGY - 10 to provide a tool that a designer will use routinely to guide his or her decisions while developing the design of low- energy building. Eventually all buildings will be designed to be delightful living, working, and learning environments, enhanced by natural light, requiring minimum resources to build and operate, –and that do not impair the environment for following generations. This library, built in 1980, has saved about 39 billion Btu (about $740,000) over its 20 years operation, compared to a typical library. It cost no more to build and gets rave reviews from the librarians and users.

3 E NERGY -10 Design Tool ENERGY - 10 E NERGY -10 is suitable for smaller buildings– commercial and institutional buildings under 10,000 sq. ft. – and also residential <10,000 sq 76% of all non-residential buildings are under 10,000 sq. ft., representing 22 % of the total built floor area and 26% of the energy use. This restriction will be removed in Version 2

4 E NERGY -10 Design Tool ENERGY - 10 National Renewable Energy Lab project lead, passive solar buildings expertise, PV Sustainable Buildings Industry Council distribution, user support training Lawrence Berkeley National Lab daylighting Berkeley Solar Group CNE thermal simulation engine U.S. Department of Energy funding and oversight

5 E NERGY -10 Design Tool ENERGY - 10 First user-friendly program based on hour-by-hour building simulation targeting early conceptual design decisions Automates many routine tasks, reducing time to produce results needed to make design decisions from days to hours Graphic input and output Technically solid Becoming widely used, both in practice and for teaching Major enhancements are in the pipeline Graphic input, Improved Daylighting, PV…

6 E NERGY -10 Design Tool ENERGY - 10 Evaluate a wide range of energy-efficient strategies, working together Daylighting Economizer cycle Reduced duct leakage Reduced infiltration Insulation Lighting controls Energy efficient lights and ballasts Passive solar heating Thermal mass Shading Better HVAC Controls High Efficiency HVAC Better windows

7 E NERGY -10 Design Tool ENERGY - 10 E NERGY -10 focuses on the first phases (conceptual design) Develop Brief Pre-design Schematic Design Design Development Construction Documents Develop reference case Develop low-energy case Rank order strategies Initial strategy selection Set performance goals Review goals Review strategies Set criteria, priorities Develop schemes Evaluate schemes Select scheme Confirm that component performances are as assumed Phase Activity Tool ENERGY-10 Preliminary team meetings ENERGY-10 EnergyPlus or other HVAC simulation and tools

8 E NERGY -10 Design Tool ENERGY - 10 Automatic features make it easy and fast AutoBuild - defines a complete building based on five inputs and many defaults APPLY - creates a second building applying upgrades to implement any or all of 12 energy-efficient strategies RANK - determines relative effectiveness of strategies

9 There are over 2000 registered users (Apr. 02) 83 site licensees are established. 60 of these are at colleges and universities where E NERGY -10 is being used as a teaching tool. Multiple answers possible Non-residential adds to 128% Building Types Analyzed Who is using the program ENERGY-10

10 E NERGY -10 Design Tool ENERGY - 10 E NERGY -10 has two powerful engines under the hood: DaylightingDOE2 split flux method ThermalCNE thermal network Each carries out 8760-hour detailed simulations. Thus interactive effects are accounted properly. Completely integrated hourly calculations

11 12C -8C Range of other results CNE result CNE Free floating temperatures Strongly solar driven building 24 12 TIME OF DAY 24 Compare CNE results with other simulation programs, DOE-2, BLAST, EnergyPlus, SERI-RES, ESPr, etc. ENERGY-10

12 E NERGY -10 Design Tool ENERGY - 10 Creates two building descriptions based on five inputs and user-defined defaults. Reference CaseLow Energy Case R-8.9 walls (4" steel stud)R-19.6 Walls (6" steel stud with 2" foam) R-19 roofR-38 roof No perimeter insulationR-10 perimeter insulation Conventional double windowsBest low-e double windows Conventional lightingEfficient lights with daylight dimming Conventional HVACHigh efficiency HVAC Conventional air-tightnessLeakage reduced 75% Uniform window orientationPassive solar orientation Conventional HVAC controlsImproved HVAC controls Conventional duct placement Ducts located inside, tightened Location Building Use Floor area Number of stories HVAC system For example: Gets you started quickly. apply

13 E NERGY -10 Design Tool ENERGY - 10 0 20 40 60 80 100 kBtu / ft² HeatingCoolingLightsOtherTotal ANNUAL ENERGY USE Reference Case Low-Energy Case 30.7 0.2 10.7 5.7 15.1 6.6 19.3 14.9 75.8 27.4 20,000 ft 2 elementary school

14 E NERGY -10 Design Tool ENERGY - 10 E NERGY -10 converts electrical and thermal energy use to annual emissions. Pounds/year CO 2 NO x ANNUAL EMISSIONS, Albuquerque School Reference CaseLow-Energy Case 399000 186000 1860 1020 970 530 SO 2 Indicates the environmental impact

15 E NERGY -10 Design Tool ENERGY - 10 E NERGY -10 uses the simulation engine to size HVAC equipment. The process is automatic and takes only 1 or 2 seconds. HVAC cost reductions can pay the added cost of all the other upgrades! kBtuh heating CFM HVAC RATED CAPACITIES, Albuquerque School Reference Case Low-Energy Case 802 349 687 478 29484 21162 cooling Provides the right information at the right time.

16 E NERGY -10 Design Tool ENERGY - 10 Automatically modifies the building description to implement any or all of 12 strategies A few mouse clicks does it—saving time Yet the user has total control Heating Cooling Lights Other Total Before apply After apply

17 E NERGY -10 Design Tool ENERGY - 10 Daylighting improves occupant performance. - In rigorous statistical studies, involving 21,000 students in 3 school districts, test scores increased by 15% to 26% in those that were daylit. - In an otherwise identical group of 108 retail stores, sales increased by 31% to 49% in those that had daylighting, compared to those without! See

18 E NERGY -10 Design Tool ENERGY - 10 Daylighting + Thermal E NERGY -10 accounts for complex interactive effects, such as those shown here (dimming lights in response to daylight reduces cooling but increases heating). Reductions in peak load are also evaluated, which effects equipment sizing. Thermal network method (exact energy balance) 12 equipment options Split-flux method

19 E NERGY -10 Design Tool ENERGY - 10 Two-day workshops are a primary means of dissemination, providing critical instruction in the principles of energy efficient design and hands-on training in the use of ENERGY-10. 53 two-day workshops have been conducted. 1111 people have attended a workshop. Average attendance is 21 persons.

20 E NERGY -10 Design Tool ENERGY - 10 The Progressive Architecture Research Award was given to NREL and SBIC for the Designing Low-Energy Buildings with E NERGY -10 package. Doug Balcomb, author of E NERGY -10 receiving the award in the Grand Ballroom at the Waldorf Astoria, New York

21 E NERGY -10 Design Tool ENERGY - 10 EVALUATE Many powerful graphical views of the data ADJUST create new weather files expands the available sites 16 fold CONVERT FILE FORMATS

22 E NERGY -10 Design Tool ENERGY - 10 3865 locations on this map plus many in Hawaii and Alaska monthly data are stored on the E NERGY -10 CD-ROM and are automatically loaded by the ADJUST wizard

23 E NERGY -10 Design Tool ENERGY - 10 From the beginning, the program has been developed in collaboration with architects and their their consultants The Sustainable Buildings Industry Council disseminates the program, provides user support, and organizes the training program.

24 E NERGY -10 Design Tool ENERGY - 10 Life-cycle cost calculations New approach to libraries New approach to saving schemes Many fixes to Version 1.3 Porting to Visual C++ 6.0 (many hidden benefits)

25 E NERGY -10 Design Tool ENERGY - 10 Full discounted cash flow analysis, accounting for all relevant factors to support cost/tradeoff decisions during conceptual design Ranks based on LCC, IRR, benefit/cost, or simple payback

26 E NERGY -10 Design Tool ENERGY - 10

27 E NERGY -10 Design Tool ENERGY - 10 Procedures, such as sequencing simulations and rank ordering, are automated, greatly reducing the time required. This entire set of calculations, including making the plot, took about 10 minutes. Parametric analysis helps guide decisions regarding best strategies to meet design team goals New ranking options in Version 1.5: Net present value Internal rate of return Benefit/cost ratio Simple payback gives the relative savings if strategies were to applied individually -20020406080 Economizer Cycle Shading High Efficiency HVAC Passive Solar Heating Air Leakage Control HVAC Controls Energy Efficient Lights Glazing Insulation Duct Leakage Net Present Value, k$ 78.39 66.38 45.96 40.82 38.73 35.89 26.22 21.12 13.67 Daylighting 48.85 2.85 RANKING OF ENERGY-EFFICIENT STRATEGIES

28 E NERGY -10 Design Tool ENERGY - 10 0 200 400 600 800 1000 1200 1400 SO2NOxCO2 lbs 0 50000 100000 150000 200000 250000 Annual CO2 Emissions, Pounds Reference CaseLow-Energy Case 1215 729 662 382 249007 128607 0 100 200 300 400 HeatingCoolingFan kBtuh 0 2000 4000 6000 8000 10000 12000 Fan Volume, CFM HVAC Rated Capacities Reference CaseLow-Energy Case 386 157 358 230 10741 6851 0 20 40 60 80 100 LoadsConsumptionCost Annual Energy, kBtu / sq. ft. 0.0 0.2 0.4 0.6 0.8 1.0 Annual Cost, $/sq. ft. Low-Energy Case - Performance Summary Other Lighting Cooling Heating 1.3 40.2 10.3 34.2 2.9 7.6 10.3 34.2 86.0 55.1 $0.90 0.01 0.12 0.16 0.60 DMAP (3D color) Solar gains in a passive solar building every hour of the year Annual Emissions Results Summary

29 E NERGY -10 Design Tool ENERGY - 10 Daily solar gains Passive solar building Typical monthly profiles Infiltration loads tight leaky Altogether, there are about 10 times as many plotting options in Version 1.5 as in Version 1.3

30 E NERGY -10 Design Tool ENERGY - 10 Replaces “variants” in Version 1.3 Buildings saved individually as schemes, rather than in pairs. Any two schemes that have been saved can be opened, side-by-side, and compared.

31 E NERGY -10 Design Tool ENERGY - 10 New whole approach to libraries. User-named libraries, e.g. “GREGLIB”. Libraries saved stored with the scheme, guaranteeing compatibility. One password protected library (ARCHIVELIB) for classroom use. New libraries for costs, EES strategies characteristics, defaults, etc.

32 E NERGY -10 Design Tool ENERGY - 10 Graphic input routine for building description Improved daylighting calculations PV simulations (already in Version 1.4 as an expert-user beta test)

33 E NERGY -10 Design Tool ENERGY - 10 Evaluate 20000 ft 2 school in Albuquerque Reference Case (energy hog) Low Energy Case Apply Strategies

34 E NERGY -10 Design Tool ENERGY - 10 Thanks for your attention.

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