Your Name Your title and organization ENERGY-10

Your Name Your title and organization

ENERGY-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 lowenergy 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, 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. –and that do not impair the environment for following generations.

ENERGY-10 Design Tool ENERGY-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

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

ENERGY-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…

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

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

ENERGY-10 Design Tool ENERGY-10 Automatic features make it easy and fast Auto. Build - 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

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

ENERGY-10 Design Tool Completely integrated hourly calculations ENERGY-10 has two powerful engines under the hood: Daylighting Thermal DOE 2 split flux method CNE thermal network Each carries out 8760 -hour detailed simulations. Thus interactive effects are accounted properly.

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

ENERGY-10 Design Tool ENERGY-10 Creates two building descriptions based on five inputs and user-defined defaults. • Location • Building Use • Floor area • Number of stories • HVAC system Gets you started quickly. For example: apply Reference Case Low Energy Case R-8. 9 walls (4" steel stud) R-19 roof No perimeter insulation Conventional double windows Conventional lighting Conventional HVAC Conventional air-tightness Uniform window orientation Conventional HVAC controls Conventional duct placement R-19. 6 Walls (6" steel stud with 2" foam) R-38 roof R-10 perimeter insulation Best low-e double windows Efficient lights with daylight dimming High efficiency HVAC Leakage reduced 75% Passive solar orientation Improved HVAC controls Ducts located inside, tightened

ENERGY-10 Design Tool ENERGY-10 20, 000 ft 2 elementary school ANNUAL ENERGY USE 100 Reference Case k. Btu / ft² 80 75. 8 Low-Energy Case 60 40 30. 7 27. 4 20 0 10. 7 0. 2 Heating 19. 3 15. 1 5. 7 Cooling 14. 9 6. 6 Lights Other Total

ENERGY-10 Design Tool ENERGY-10 converts electrical and thermal energy use to annual emissions. ANNUAL EMISSIONS, Albuquerque School Pounds/year Reference Case 399000 Low-Energy Case 186000 1020 970 530 CO 2 SO 2 Indicates the environmental impact NOx

ENERGY-10 Design Tool ENERGY-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! HVAC RATED CAPACITIES, Albuquerque School Reference Case 802 k. Btuh Low-Energy Case 29484 687 21162 478 349 heating cooling CFM Provides the right information at the right time.

ENERGY-10 Design Tool ENERGY-10 Automatically modifies the building description to implement any or all of 12 strategies Before apply After apply in g ts g ol gh A few mouse clicks does it—saving time Yet the user has total control at in Co Li He O th er To ta l

ENERGY-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 www. h-m-g. com

ENERGY-10 Design Tool ENERGY-10 Daylighting Split-flux method + Thermal network method (exact energy balance) 12 equipment options ENERGY-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.

ENERGY-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.

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

ENERGY-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

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

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

ENERGY-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)

ENERGY-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

ENERGY-10 Design Tool ENERGY-10

ENERGY-10 Design Tool ENERGY-10 RANKING OF ENERGY-EFFICIENT STRATEGIES 78. 39 Duct Leakage Insulation Daylighting 66. 38 48. 85 45. 96 Glazing Energy Efficient Lights HVAC Controls Air Leakage Control Passive Solar Heating High Efficiency HVAC Shading Economizer Cycle -20 40. 82 38. 73 35. 89 26. 22 21. 12 13. 67 2. 85 0 20 gives the relative savings if strategies were to applied individually 40 60 80 Net Present Value, k$ New ranking options in Version 1. 5: Net present value Internal rate of return Benefit/cost ratio Simple payback 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

ENERGY-10 Design Tool ENERGY-10 HVAC Rated Capacities Annual Emissions Results Reference Case Low-Energy Case 249007 1400 Low-Energy Case 12000 386 358 1215 150000 800 729 128607 662 600 100000 382 400 50000 10741 10000 300 8000 230 k. Btuh 200000 1000 Annual CO 2 Emissions, Pounds 1200 lbs 400 250000 6851 200 6000 157 4000 100 200 0 SO 2 NOx CO 2 0 0 0 Heating Cooling Fan Low-Energy Case - Performance Summary $0. 90 1. 0 86. 0 80 0. 8 34. 2 60 55. 1 0. 60 0. 6 10. 3 40 20 0 0. 4 34. 2 40. 2 0. 16 10. 3 1. 3 7. 6 2. 9 0. 12 0. 01 0. 2 Annual Cost, $/sq. ft. Annual Energy, k. Btu / sq. ft. 100 DMAP (3 D color) 0. 0 Loads Consumption Cost Other Lighting Cooling Heating Summary Solar gains in a passive solar building every hour of the year Fan Volume, CFM Reference Case

ENERGY-10 Design Tool ENERGY-10 Daily solar gains tight leaky Passive solar building Typical monthly profiles Infiltration loads Altogether, there about 10 times as many plotting options in Version 1. 5 as in Version 1. 3

ENERGY-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.

ENERGY-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.

ENERGY-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)

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

ENERGY-10 Design Tool ENERGY-10 Thanks for your attention.