p. 1
Energy Systems Laboratory © 2005
Accounting for Energy Efficiency &
Renewable Energy in State
Implementation Plans:
Progress 2001 - 2005
Jeff Haberl, Charles Culp, Bahman Yazdani,
Don Gilman, Tom Fitzpatrick, Shirley Muns
Energy Systems Laboratory, Texas Engineering Experiment Station
•
Faculty/Staff:
Dan Turner, Malcolm Verdict, Larry
Degelman, Betty Liu, Juan-Carlos Baltazar-Cervantes,
Mushtaq Ahmed, Sherry Hughes, Holly Wiley, Rebecca
Brister
•
Students:
Piljae Im, Seongchan Kim, Jaya Mukhopadhyay,
Chayapa Choncharoensuk, Soolyeon Cho, Mini Malhotra,
Suwon Song, Yiwen Zhu, Sopa Visitsak, Swapnil Sinvhal,
Matt Sanders, Shane Crawford, Xiaowei Tan, Bill Robbins,
Andrew Niemann, Saurabh Jain, Chris Anderson, Hyemee
Choi, Heeyeon Jo, Stanton Ware, Stephen O’Neal, Ryan
Melissari.
•
TCEQ:
Steve Anderson, Alfred Reyes.
p. 3
Energy Systems Laboratory © 2005
Houston-Galveston-Brazoria Region
Peak Ozone Pollution Days
•
Ch. 386. Texas Emissions Reduction Plan
–
Sec. 386.205. Evaluation Of State Energy Efficiency Programs (with PUC)
•
Ch. 388. Texas Building Energy Performance Standards
–
Sec. 388.003. Adoption Of Building Energy Efficiency Performance Standards.
–
Sec. 388.004. Enforcement Of Energy Standards Outside Of Municipality.
–
Sec. 388.007. Distribution Of Information And Technical Assistance.
–
Sec. 388.008. Development Of Home Energy Ratings.
Senate Bill 5 (77
th
Legislature, 2001)
TERP Amended (78th Legislature, 2003)
•
Ch. 388. Texas Building Energy Performance Standards
–
(HB 1365) Sec. 388.004. Enforcement Of Energy Standards Outside Of Municipality.
–
(HB 1365) Sec. 388.009. Energy-Efficient Building Program.
–
(HB 3235) Sec. 388.009. Certification of Municipal Inspectors.
TERP Amended (79th Legislature, 2005)
•
Ch. 382 & 386. Health and Safety Code
–
(HB 2129) Sec. 386.056 Development of Creditable Statewide emissions from wind and
other renewables.
p. 5
Energy Systems Laboratory © 2005
Texas Residential Building Envelope Requirements
2
3
9
8
4
7
5
6
1NR means “No Requirement” specified in IECC Chapter 5 for SHGC in Zone 8 and 9.
2The map in IRC Figure R301.2(6) or IECC Figure 502.2(7) indicates that parts of Texas qualify as areas of "very heavy" termite infestation probability. Under an exception in the IRC, the slab perimeter insulation requirement in this path may be avoided. To make use of this exception and still comply with the Code, a builder must use IECC Section 502.2.1.4, IECC Section 502.2.4, or IECC Chapter 4, instead of this path.
1. The Table of Building Envelope Requirements is based upon the 2000 International Residential Code (IRC), published by the International Code Council, as amended by the 2001 Supplement. 2. The IRC prescriptive requirements are applicable to single family
homes with glazing areas of 15% and below. For homes designed with glazing areas greater than 15%, the IRC incorporates the International Energy Conservation Code (IECC) by reference, which contains additional prescriptive and performance-related compliance alternatives. The glazing areas for each path are maximum levels. For example, a glazing area of 22% must use Path 3, which is the path level for 25% glazing area. 3. Source of requirements: 2000 IRC, Ch. 11 (up to 15% only) and 2000
IECC, Ch. 5, Prescriptive Packages for Climate Zones 2-9, and the 2001 Supplement to IECC. IECC Chapter 4 must be used for glazing areas greater than 25%. 4. U-factor, and SHGC are maximum acceptable values. 5. Insulation R-values are minimum acceptable levels. 6. Applies to single-family, wood-frame residential construction, only. For
mass wall construction, see IRC Section N1102.1.1.1; for steel-framed walls, see IRC Section N1102.1.1.2. 7. ”Glazing" refers to any translucent or transparent material in exterior
openings of buildings, including windows, skylights, sliding glass doors, the glass areas of opaque doors, and glass block. 8. Fenestration product (window, door, glazing) U-factor and SHGC must
be determined from a National Fenestration Rating Council (NFRC) label on the product, or obtained from default tables (IECC Table 102.5.2(3) in Chapter 1). 9. Glazing area % is the ratio of the area of the rough opening of windows
to the gross wall area, expressed as a percentage. Up to one percent of the total window area may be exempt from the U-factor requirement.
10. Opaque doors are not considered glazing (or "windows") and must have a U-factor less than 0.35. One exempt door allowed. 11. Infiltration requirements: Windows ≤0.30 cfm per sq.ft. of window
area; sliding doors ≤0.30 cfm per sq.ft. of door area (swinging doors below 0.50 cfm); determined in accordance with AAMA/WDMA 101/I.S.2 (must be tested in accordance with ASTM E 283). 12. R-2 shall be added to the requirements for slab insulation where
uninsulated hot water pipes, air distribution ducts or electric heating cables are installed in or under the slab. 13. Floors over outside air must meet ceiling insulation requirements
(Table 502.2 in the IECC). 14. R-values for walls represent the sum of cavity insulation plus insulated
sheathing, if any. 15. Prescriptive packages are based upon meeting or exceeding
minimum equipment efficiencies for HVAC and water heating (IECC Tables 503.2 and 504.2). Notes: 15 .90 .40 R-19R-11 20 .75 .40 R-30R-13 25 .65 .40 R-30R-13 15 .45 1NR R-38R-13 20 .37 1NR R-38R-13 25 .37 1NR R-38R-19 1 2 3 R-19 R-8 R-5, 2ft R-11 R-19 R-9 R-6, 2ft R-13 R-19 R-9 R-6, 2ft R-13 1 2 3 15 .50 1NR R-30R-13 20 .42 1NR R-38R-13 25 .41 1NR R-38R-19 R-19 R-8 R-5, 2ft R-10 R-19 R-8 R-6, 2ft R-10 R-19 R-8 R-6, 2ft R-10 1 2 3 15 .55 .40 R-30R-13 20 .46 .40 R-38R-13 25 .45 .40 R-38R-19 R-19 R-7 2R-4, 2ft R-8 R-19 R-7 R-0 R-8 R-19 R-7 R-0 R-8 1 2 3 15 .60 .40 R-30R-13 20 .50 .40 R-38R-13 25 .46 .40 R-38R-16 R-19 R-6 2R-4, 2ft R-7 R-19 R-6 R-0 R-7 R-19 R-6 R-0 R-7 1 2 3 15 .65 .40 R-30R-13 20 .52 .40 R-38R-13 25 .50 .40 R-38R-13 R-11 R-5 R-0 R-6 R-11 R-5 R-0 R-6 R-19 R-8 R-0 R-10 1 2 3 15 .75 .40 R-26R-13 20 .60 .40 R-30R-13 25 .52 .40 R-30R-13 R-11 R-5 R-0 R-5 R-11 R-5 R-0 R-5 R-13 R-6 R-0 R-6 1 2 3 15 .75 .40 R-19R-11 20 .70 .40 R-30R-13 25 .55 .40 R-30R-13 R-11 R-0 R-0 R-5 R-11 R-0 R-0 R-5 R-11 R-0 R-0 R-5 1 2 3 R-11 R-0 R-0 R-4 R-11 R-0 R-0 R-4 R-11 R-0 R-0 R-4 Wall Ceiling Area% U-Factor SHGC Glazing Path Crawl Basement Slab Space FloorWall Perimeter Wall Glazing and Insulation Foundation Type Table of Building Envelope Requirements
©2001, 2002 Texas Engineering Experiment Station, Energy Systems Laboratory, All Rights Reserved
Climate Zone
Energy Systems Laboratory
http://eslsb5.tamu.edu Toll Free: 1-877-AnM-CODE (1-877-266-2633) Texas Engineering Experiment Station The Texas A&M University System Simplified Prescriptive Paths for Envelope Compliance with the International Residential Code (IRC 2000)
Texas Residential Building Envelope Requirements
2
3
9
8
4
7
5
6
1NR means “No Requirement” specified in IECC Chapter 5 for SHGC in Zone 8 and 9.
2The map in IRC Figure R301.2(6) or IECC Figure 502.2(7) indicates that parts of Texas qualify as areas of "very heavy" termite infestation probability. Under an exception in the IRC, the slab perimeter insulation requirement in this path may be avoided. To make use of this exception and still comply with the Code, a builder must use IECC Section 502.2.1.4, IECC Section 502.2.4, or IECC Chapter 4, instead of this path.
1. The Table of Building Envelope Requirements is based upon the 2000 International Residential Code (IRC), published by the International Code Council, as amended by the 2001 Supplement. 2. The IRC prescriptive requirements are applicable to single family
homes with glazing areas of 15% and below. For homes designed with glazing areas greater than 15%, the IRC incorporates the International Energy Conservation Code (IECC) by reference, which contains additional prescriptive and performance-related compliance alternatives. The glazing areas for each path are maximum levels. For example, a glazing area of 22% must use Path 3, which is the path level for 25% glazing area. 3. Source of requirements: 2000 IRC, Ch. 11 (up to 15% only) and 2000
IECC, Ch. 5, Prescriptive Packages for Climate Zones 2-9, and the 2001 Supplement to IECC. IECC Chapter 4 must be used for glazing areas greater than 25%. 4. U-factor, and SHGC are maximum acceptable values. 5. Insulation R-values are minimum acceptable levels. 6. Applies to single-family, wood-frame residential construction, only. For
mass wall construction, see IRC Section N1102.1.1.1; for steel-framed walls, see IRC Section N1102.1.1.2. 7. ”Glazing" refers to any translucent or transparent material in exterior
openings of buildings, including windows, skylights, sliding glass doors, the glass areas of opaque doors, and glass block. 8. Fenestration product (window, door, glazing) U-factor and SHGC must
be determined from a National Fenestration Rating Council (NFRC) label on the product, or obtained from default tables (IECC Table 102.5.2(3) in Chapter 1). 9. Glazing area % is the ratio of the area of the rough opening of windows
to the gross wall area, expressed as a percentage. Up to one percent of the total window area may be exempt from the U-factor requirement.
10. Opaque doors are not considered glazing (or "windows") and must have a U-factor less than 0.35. One exempt door allowed. 11. Infiltration requirements: Windows ≤0.30 cfm per sq.ft. of window
area; sliding doors ≤0.30 cfm per sq.ft. of door area (swinging doors below 0.50 cfm); determined in accordance with AAMA/WDMA 101/I.S.2 (must be tested in accordance with ASTM E 283). 12. R-2 shall be added to the requirements for slab insulation where
uninsulated hot water pipes, air distribution ducts or electric heating cables are installed in or under the slab. 13. Floors over outside air must meet ceiling insulation requirements
(Table 502.2 in the IECC). 14. R-values for walls represent the sum of cavity insulation plus insulated
sheathing, if any. 15. Prescriptive packages are based upon meeting or exceeding
minimum equipment efficiencies for HVAC and water heating (IECC Tables 503.2 and 504.2). Notes: 15 .90 .40 R-19R-11 20 .75 .40 R-30R-13 25 .65 .40 R-30R-13 15 .45 1NR R-38R-13 20 .37 1NR R-38R-13 25 .37 1NR R-38R-19 1 2 3 R-19 R-8 R-5, 2ft R-11 R-19 R-9 R-6, 2ft R-13 R-19 R-9 R-6, 2ft R-13 1 2 3 15 .50 1NR R-30R-13 20 .42 1NR R-38R-13 25 .41 1NR R-38R-19 R-19 R-8 R-5, 2ft R-10 R-19 R-8 R-6, 2ft R-10 R-19 R-8 R-6, 2ft R-10 1 2 3 15 .55 .40 R-30R-13 20 .46 .40 R-38R-13 25 .45 .40 R-38R-19 R-19 R-7 2R-4, 2ft R-8 R-19 R-7 R-0 R-8 R-19 R-7 R-0 R-8 1 2 3 15 .60 .40 R-30R-13 20 .50 .40 R-38R-13 25 .46 .40 R-38R-16 R-19 R-6 2R-4, 2ft R-7 R-19 R-6 R-0 R-7 R-19 R-6 R-0 R-7 1 2 3 15 .65 .40 R-30R-13 20 .52 .40 R-38R-13 25 .50 .40 R-38R-13 R-11 R-5 R-0 R-6 R-11 R-5 R-0 R-6 R-19 R-8 R-0 R-10 1 2 3 15 .75 .40 R-26R-13 20 .60 .40 R-30R-13 25 .52 .40 R-30R-13 R-11 R-5 R-0 R-5 R-11 R-5 R-0 R-5 R-13 R-6 R-0 R-6 1 2 3 15 .75 .40 R-19R-11 20 .70 .40 R-30R-13 25 .55 .40 R-30R-13 R-11 R-0 R-0 R-5 R-11 R-0 R-0 R-5 R-11 R-0 R-0 R-5 1 2 3 R-11 R-0 R-0 R-4 R-11 R-0 R-0 R-4 R-11 R-0 R-0 R-4 Wall Ceiling Area% U-Factor SHGC Glazing Path Crawl Basement Slab Space FloorWall Perimeter Wall Glazing and Insulation Foundation Type Table of Building Envelope Requirements
©2001, 2002 Texas Engineering Experiment Station, Energy Systems Laboratory, All Rights Reserved
Climate Zone
Energy Systems Laboratory
http://eslsb5.tamu.edu Toll Free: 1-877-AnM-CODE (1-877-266-2633) Texas Engineering Experiment Station The Texas A&M University System Simplified Prescriptive Paths for Envelope Compliance with the International Residential Code (IRC 2000)
•
2001 - 2003
–
Provided IECC/IRC workshops
•
Resolved issues: 90.1-1999, economizers, EnergyStar, SEER 12, R-6
flex-duct
–
Developed accounting methods
•
Code-compliant Test Suite for SF, MF, Commercial.
–
Developed Simplified Builder’s Guide.
–
Published 2002 Report to the TNRCC
•
2.1 tons NOx/peak-day (DOE-2,‘98 eGRID, SF, by avg.
PCA, TMY2)
–
Developed Emissions Calculator (Beta, 12/02)
–
Demonstrated value of peak day vs annual avg. calcs.
–
Recommended weather-normalization methods ( Peak day from
monthly utility bills).
–
Published 2003 Report to the TCEQ
•
2.4 tons NOx/peak-day (DOE-2, ‘98 eGRID, SF & MF, by
PCA, by Co., TMY2)
–
Developed eCALC with funding from EPA
•
SF, MF, Office, Retail, Solar, Street & Traffic Lights,
Water/Waste Water, Solar, PV, Wind
–
Studied NOx reductions from DHW pilot lights (2020)
–
Studied Cumulative NOx reductions: SF + MF
–
Developed AACOG Report
•
Discount factors, degradation, SIP credits
–
Developed web-based input for SECO Political Subdivisions.
–
2004 Emissions Reduction & Energy Leadership Conf., San
Antonio, Texas
–
Published 2003 Report to the TCEQ
•
1.9 tons NOx/peak-day (DOE-2, ‘99 eGRID, SF & MF, by
PCA, by Co., 1999 NWS, fuel-neutral)
Progress 2001 to 2005
Energy Systems Laboratory - Texas A&M University
http://eslsb5.tamu.eduToll Free: 1-877-AnM-CODE (1-877-266-2633)
Anderson Angelina Bandera Bell Blanco Bosque Brewster Brown Burnet Cherokee Coleman Comanche Concho Coryell Crane Crockett Dallas Edwards Ellis Falls Freestone Gillespie Hamilton Hays Henderson Hill Hood Houston Irion Jasper Johnson Kendall Kerr Kimble Lampasas Leon Limestone Llano Mason McCulloch McLennan Menard Mills Nacogdoches Navarro Newton Panola Pecos Polk Presidio Reagan Real Runnels Rusk Sabine San Augustine San Saba Schleicher Shelby Smith Somervell Sutton Tarrant Terrell Tom Green Travis Trinity Tyler Upton Williamson 2,000 - 2,499 HDD
5
International Residential Code (IRC 2000) and International Energy Conservation Code (IECC 2000) as of May 1, 2001
Texas Residential Building Guide to Energy Code Compliance
Using This Guide
This guide contains eight color-coded climate zones (numbers 2 through 9) designed to simplify determination of the envelope requirements of the International Residential Code (IRC 2000, Chapter 11) or the International Energy Conservation Code (IECC 2000) for Texas. Refer to the IRC 2000 or IECC 2000, as amended by the 2001 Supplement, for a complete description of all the requirements and compliance alternatives. Local requirements may also vary. Each county is assigned to one of the eight zones, which vary according to the different climate zones in Texas.
Step-by-Step Instructions
A. Use the color-coded map to locate the county in which the construction or remodeling is taking place and find the climate zone (2 through 9) associated with that county. B. Use the "Table of Building Envelope
Requirements" (on the back of this sheet) to find the set of construction options or "paths" associated with the climate zone selected above. Each path describes an acceptable combination of envelope components based on percent glazed area. C. Review the paths and select the one
most suited to your project. D. Construct or remodel the building
according to the selected path and comply with basic code requirements, which include: • Installing components to Mfr specifications • Documenting load calculations to insure properly
sized HVAC equipment • Meeting minimum equipment efficiency
requirements for HVAC, water heating and other fixtures (Tables 503.2 and 504.2 of IECC) • Providing preventative maintenance manuals • Installing temperature controls • Limiting window and door leakage • Caulking or sealing joints, gaps and penetrations • Installing vapor retarders where required • Sealing and insulating ducts (No duct tape
allowed) • Insulating pipes properly
Limitations
Texas recently enacted a statewide energy code. This guide provides a simplified prescriptive specification for individual envelope components to aid with code compliance. This guide does not provide a guarantee for meeting the IRC. For additional details on the IRC or IECC, refer to the code documents, consult local code officials or contact the International Code Council.
Texas Counties by Climate Zones
Briscoe Cochran Donley Floyd Hale Hall Hockley Lamb Swisher Yoakum 3,500 - 3,999 HDD
8
Archer Baylor Borden Childress Clay Collingsworth Cottle Crosby Dawson Dickens Foard Gaines Garza Hardeman Kent King Knox Lubbock Lynn Motley Scurry Stonewall Terry Wichita Wibarger 3,000 - 3,499 HDD7
2,500 - 2,999 HDD Andrews Bowie Callahan Camp Cass Coke Collin Cooke Culberson Delta Denton Eastland Ector El Paso Erath Fannin Fisher Franklin Glasscock Grayson Gregg Harrison Haskell Hopkins Howard Hudspeth Hunt Jack Jeff Davis Jones Kaufman Lamar Loving Marion Martin Midland Mitchell Montague Morris Nolan Palo Pinto Parker Rains Red River Reeves Rockwall Shackelford Stephens Sterling Taylor Throckmorton Titus Upshur Van Zandt Ward Winkler Wise Wood Young6
1,500 - 1,999 HDD Austin Bastrop Bexar Brazos Burleson Caldwell Chambers Colorado Comal Fayette Fort Bend Gonzales Grimes Guadalupe Hardin Harris Jefferson Kinney Lavaca Lee Liberty Madison Medina Milam Montgomery Orange Robertson San Jacinto Uvalde Val Verde Walker Waller Washington Wilson4
Armstrong Bailey Carson Castro Dallam Deaf Smith Gray Hansford Hartley Hemphill Hutchinson Lipscomb Moore Ochiltree Oldham Parmer Potter Randall Roberts Sherman Wheeler 4,000 - 4,499 HDD9
Use the color-coded map of Texas to locate a county. The reverse side of this form shows three prescriptive paths for the selected Climate Zone.
HDD = Heating Degree Days (base 65°F)
Texas Edition 2001, Revision 1.04
BrooksJim Hogg Starr CameronKenedy Willacy Hidalgo Kleberg Zapata
500 - 999 HDD
2
Aransas Atascosa Bee Brazoria Calhoun DeWitt Dimmit Duval Frio Galveston Goliad Jackson Jim Wells Karnes La Salle Live Oak Matagorda Maverick McMullen Nueces Refugio San Patricio Victoria Webb Wharton Zavala 1,000 - 1,499 HDD3
Energy Systems Laboratory - Texas A&M University
http://eslsb5.tamu.eduToll Free: 1-877-AnM-CODE (1-877-266-2633)
Anderson Angelina Bandera Bell Blanco Bosque Brewster Brown Burnet Cherokee Coleman Comanche Concho Coryell Crane Crockett Dallas Edwards Ellis Falls Freestone Gillespie Hamilton Hays Henderson Hill Hood Houston Irion Jasper Johnson Kendall Kerr Kimble Lampasas Leon Limestone Llano Mason McCulloch McLennan Menard Mills Nacogdoches Navarro Newton Panola Pecos Polk Presidio Reagan Real Runnels Rusk Sabine San Augustine San Saba Schleicher Shelby Smith Somervell Sutton Tarrant Terrell Tom Green Travis Trinity Tyler Upton Williamson 2,000 - 2,499 HDD
5
Anderson Angelina Bandera Bell Blanco Bosque Brewster Brown Burnet Cherokee Coleman Comanche Concho Coryell Crane Crockett Dallas Edwards Ellis Falls Freestone Gillespie Hamilton Hays Henderson Hill Hood Houston Irion Jasper Johnson Kendall Kerr Kimble Lampasas Leon Limestone Llano Mason McCulloch McLennan Menard Mills Nacogdoches Navarro Newton Panola Pecos Polk Presidio Reagan Real Runnels Rusk Sabine San Augustine San Saba Schleicher Shelby Smith Somervell Sutton Tarrant Terrell Tom Green Travis Trinity Tyler Upton Williamson 2,000 - 2,499 HDD5
International Residential Code (IRC 2000) and International Energy Conservation Code (IECC 2000) as of May 1, 2001
Texas Residential Building Guide to Energy Code Compliance
Using This Guide
This guide contains eight color-coded climate zones (numbers 2 through 9) designed to simplify determination of the envelope requirements of the International Residential Code (IRC 2000, Chapter 11) or the International Energy Conservation Code (IECC 2000) for Texas. Refer to the IRC 2000 or IECC 2000, as amended by the 2001 Supplement, for a complete description of all the requirements and compliance alternatives. Local requirements may also vary. Each county is assigned to one of the eight zones, which vary according to the different climate zones in Texas.
Step-by-Step Instructions
A. Use the color-coded map to locate the county in which the construction or remodeling is taking place and find the climate zone (2 through 9) associated with that county. B. Use the "Table of Building Envelope
Requirements" (on the back of this sheet) to find the set of construction options or "paths" associated with the climate zone selected above. Each path describes an acceptable combination of envelope components based on percent glazed area. C. Review the paths and select the one
most suited to your project. D. Construct or remodel the building
according to the selected path and comply with basic code requirements, which include: • Installing components to Mfr specifications • Documenting load calculations to insure properly
sized HVAC equipment • Meeting minimum equipment efficiency
requirements for HVAC, water heating and other fixtures (Tables 503.2 and 504.2 of IECC) • Providing preventative maintenance manuals • Installing temperature controls • Limiting window and door leakage • Caulking or sealing joints, gaps and penetrations • Installing vapor retarders where required • Sealing and insulating ducts (No duct tape
allowed) • Insulating pipes properly
Limitations
Texas recently enacted a statewide energy code. This guide provides a simplified prescriptive specification for individual envelope components to aid with code compliance. This guide does not provide a guarantee for meeting the IRC. For additional details on the IRC or IECC, refer to the code documents, consult local code officials or contact the International Code Council.
Texas Counties by Climate Zones
Briscoe Cochran Donley Floyd Hale Hall Hockley Lamb Swisher Yoakum 3,500 - 3,999 HDD
8
Briscoe Cochran Donley Floyd Hale Hall Hockley Lamb Swisher Yoakum 3,500 - 3,999 HDD Briscoe Cochran Donley Floyd Hale Hall Hockley Lamb Swisher Yoakum Briscoe Cochran Donley Floyd Hale Hall Hockley Lamb Swisher Yoakum 3,500 - 3,999 HDD8
Archer Baylor Borden Childress Clay Collingsworth Cottle Crosby Dawson Dickens Foard Gaines Garza Hardeman Kent King Knox Lubbock Lynn Motley Scurry Stonewall Terry Wichita Wibarger 3,000 - 3,499 HDD7
Archer Baylor Borden Childress Clay Collingsworth Cottle Crosby Dawson Dickens Foard Gaines Garza Hardeman Kent King Knox Lubbock Lynn Motley Scurry Stonewall Terry Wichita Wibarger 3,000 - 3,499 HDD7
2,500 - 2,999 HDD Andrews Bowie Callahan Camp Cass Coke Collin Cooke Culberson Delta Denton Eastland Ector El Paso Erath Fannin Fisher Franklin Glasscock Grayson Gregg Harrison Haskell Hopkins Howard Hudspeth Hunt Jack Jeff Davis Jones Kaufman Lamar Loving Marion Martin Midland Mitchell Montague Morris Nolan Palo Pinto Parker Rains Red River Reeves Rockwall Shackelford Stephens Sterling Taylor Throckmorton Titus Upshur Van Zandt Ward Winkler Wise Wood Young6
2,500 - 2,999 HDD Andrews Bowie Callahan Camp Cass Coke Collin Cooke Culberson Delta Denton Eastland Ector El Paso Erath Fannin Fisher Franklin Glasscock Grayson Gregg Harrison Haskell Hopkins Howard Hudspeth Hunt Jack Jeff Davis Jones Kaufman Lamar Loving Marion Martin Midland Mitchell Montague Morris Nolan Palo Pinto Parker Rains Red River Reeves Rockwall Shackelford Stephens Sterling Taylor Throckmorton Titus Upshur Van Zandt Ward Winkler Wise Wood Young 2,500 - 2,999 HDD Andrews Bowie Callahan Camp Cass Coke Collin Cooke Culberson Delta Denton Eastland Ector El Paso Erath Fannin Fisher Franklin Glasscock Grayson Gregg Harrison Haskell Hopkins Howard Hudspeth Hunt Jack Jeff Davis Jones Kaufman Lamar Loving Marion Martin Midland Mitchell Montague Morris Nolan Palo Pinto Parker Rains Red River Reeves Rockwall Shackelford Stephens Sterling Taylor Throckmorton Titus Upshur Van Zandt Ward Winkler Wise Wood Young Andrews Bowie Callahan Camp Cass Coke Collin Cooke Culberson Delta Denton Eastland Ector El Paso Erath Fannin Fisher Franklin Glasscock Grayson Gregg Harrison Haskell Hopkins Howard Hudspeth Hunt Jack Jeff Davis Jones Kaufman Lamar Loving Marion Martin Midland Mitchell Montague Morris Nolan Palo Pinto Parker Rains Red River Reeves Rockwall Shackelford Stephens Sterling Taylor Throckmorton Titus Upshur Van Zandt Ward Winkler Wise Wood Young6
1,500 - 1,999 HDD Austin Bastrop Bexar Brazos Burleson Caldwell Chambers Colorado Comal Fayette Fort Bend Gonzales Grimes Guadalupe Hardin Harris Jefferson Kinney Lavaca Lee Liberty Madison Medina Milam Montgomery Orange Robertson San Jacinto Uvalde Val Verde Walker Waller Washington Wilson4
1,500 - 1,999 HDD Austin Bastrop Bexar Brazos Burleson Caldwell Chambers Colorado Comal Fayette Fort Bend Gonzales Grimes Guadalupe Hardin Harris Jefferson Kinney Lavaca Lee Liberty Madison Medina Milam Montgomery Orange Robertson San Jacinto Uvalde Val Verde Walker Waller Washington Wilson4
Armstrong Bailey Carson Castro Dallam Deaf Smith Gray Hansford Hartley Hemphill Hutchinson Lipscomb Moore Ochiltree Oldham Parmer Potter Randall Roberts Sherman Wheeler 4,000 - 4,499 HDD9
Armstrong Bailey Carson Castro Dallam Deaf Smith Gray Hansford Hartley Hemphill Hutchinson Lipscomb Moore Ochiltree Oldham Parmer Potter Randall Roberts Sherman Wheeler 4,000 - 4,499 HDD Armstrong Bailey Carson Castro Dallam Deaf Smith Gray Hansford Hartley Hemphill Hutchinson Lipscomb Moore Ochiltree Oldham Parmer Potter Randall Roberts Sherman Wheeler Armstrong Bailey Carson Castro Dallam Deaf Smith Gray Hansford Hartley Hemphill Hutchinson Lipscomb Moore Ochiltree Oldham Parmer Potter Randall Roberts Sherman Wheeler 4,000 - 4,499 HDD9
Use the color-coded map of Texas to locate a county. The reverse side of this form shows three prescriptive paths for the selected Climate Zone.
HDD = Heating Degree Days (base 65°F)
Texas Edition 2001, Revision 1.04
BrooksJim Hogg Starr CameronKenedy Willacy Hidalgo Kleberg Zapata
500 - 999 HDD
2
BrooksJim Hogg Starr CameronKenedy Willacy Hidalgo Kleberg Zapata
500 - 999 HDD
BrooksJim Hogg Starr CameronKenedy Willacy Hidalgo Kleberg Zapata
500 - 999 HDD
2
Aransas Atascosa Bee Brazoria Calhoun DeWitt Dimmit Duval Frio Galveston Goliad Jackson Jim Wells Karnes La Salle Live Oak Matagorda Maverick McMullen Nueces Refugio San Patricio Victoria Webb Wharton Zavala 1,000 - 1,499 HDD3
Aransas Atascosa Bee Brazoria Calhoun DeWitt Dimmit Duval Frio Galveston Goliad Jackson Jim Wells Karnes La Salle Live Oak Matagorda Maverick McMullen Nueces Refugio San Patricio Victoria Webb Wharton Zavala Aransas Atascosa Bee Brazoria Calhoun DeWitt Dimmit Duval Frio Galveston Goliad Jackson Jim Wells Karnes La Salle Live Oak Matagorda Maverick McMullen Nueces Refugio San Patricio Victoria Webb Wharton Zavala 1,000 - 1,499 HDD3
0.0000
0.0500
0.1000
0.1500
0.2000
0.2500
0.3000
0.3500
0.4000
0.0000
0.0500
0.1000
0.1500
0.2000
0.2500
0.3000
0.3500
0.4000
Tons-NOx/day (average)
T
o
n
s-N
O
X
/d
a
y (
p
eak
)
Apx 2x difference
1:1
2:1
EGRID Calculated
Laboratory Calculated
2007 - Peak-day: 3.83 Tons
2012 - Peak-day: 6.58 Tons
•
2004/2005
–
Develop preliminary emissions reductions calculations
from green power (wind) purchases. Demonstrated
weather normalization, forecasting, emissions
reductions (hourly,daily,monthly). Calculated 1999 NOx
reductions from 2002 electrical production data.
–
Provided Technical Support to PUC to report
emissions reductions from SB5 and SB7 programs
(4.17 tons NOx/day – 2010).
–
Helped TCEQ Develop an Integrated Emissions
Reporting (2010): ESL, PUC, SECO, Wind power.
–
Developed joint survey with TREIA for solar
installations.
–
Developed revised analysis of NOx reductions from
DHW (2.5 tons NOx/day, 2010, new+replacement)
–
Developed analysis of NOx reductions from
replacement furnaces (0.4 tons-NOx/day, 2006)
–
Developed New 6/SEER 14 tradeoff to replace
R-6/SEER 12 tradeoff, including, SHCG, and AFUE.
–
Asked to offer Technical Assistance to PUC by State
Senator John Carona
–
Developed preliminary shading analysis for potential
PUC tree planting program.
–
Add new water/waste water design module to eCALC
(EPA funding)
Progress 2001 to 2005
OSD NOx re duction le v e ls (Pre liminary Estimate s)
0
2
4
6
8
10
12
14
16
18
2004 Cumul at iv e 2005 Cumul at iv e 2006 Cumul at iv e 2007 Cumul at iv e 2008 Cumul at iv e 2009 Cumul at i v e 2010
To
ns
/O
z
o
ne
Se
a
s
on
D
a
y
ESL-Single Family
ESL-Multif amily
PUC (SB7)
PUC (SB5 grant program)
SECO
Wind-ERCOT
Randall
Hourly Turbine Power vs. Wind Speed (Enertech)
0
10
20
30
40
50
0
5
10
15
20
25
30
35
40
45
On-site Wind Speed (MPH)
Tu
rb
in
e
P
o
w
e
r
(k
W
h
/h
)
Daily Turbine Power vs. Wind Speed (Enertech)
0
100
200
300
400
500
600
700
800
900
0
5
10
15
20
25
30
On-site Average Daily Wind Speed (MPH)
Turbi
ne
P
o
w
e
r
(k
W
h
/d
a
y
)
Wind Turbine Power 3P Model (Enertech) - Monthly
0
100
200
300
400
500
600
700
800
900
0
5
10
15
20
25
30
On-site Wind Speed (MPH)
W
ind
Tur
bi
ne
P
o
w
e
r (k
W
h
/d
a
y
)
Monthly Wind Turbine Power 1999-2002
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Date
Average
1999
2000
2001
2002
Ozone Season Day (OSD) NOx Reductions
(Base Case - Scenario 2)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
20
01
20
03
20
05
20
07
20
09
20
11
20
13
20
15
20
17
20
19
Year
O
S
D NO
x
S
a
v
in
g
s
(T
o
n
s-N
O
x/
d
a
y)
Ozone Season Day NOx Emissions Reductions
0.0
0.1
0.1
0.2
0.2
0.3
0.3
0.4
0.4
0.5
2
001
2
002
2
003
2
004
2
005
2
006
2
007
2
008
2
009
2
010
2
011
2
012
2
013
2
014
2
015
2
016
2
017
2
018
2
019
2
020
Year
O
S
D
N
O
x S
avi
ngs
(
T
ons
-N
O
x
/d
ay)
-5.00
-4.00
-3.00
-2.00
-1.00
0.00
1.00
2.00
3.00
4.00
5.00
0
500
1000
1500
2000
2500
3000
3500
4000
4500
HDD
T
o
ta
l E
n
er
gy
D
iff
e
re
nc
e
(%
)
p. 7
Energy Systems Laboratory © 2005
•
Integrated Emissions Reporting
– Helped TCEQ Develop an Integrated Emissions
Reporting (2010): ESL, PUC, SECO, Wind
• ESL Code Compliance (4.5 tons/day)
• PUC SB5,SB7 programs (3.9 tons/day)
• SECO Political Sub. (1.3 tons/day)
• Green Power (Wind) (5.7 tons/day)
• Total (15.4 tons/day)
Progress 2001 to 2005
OSD NOx reduction leve ls (Preliminary Estimate s)
0
2
4
6
8
10
12
14
16
18
2004
Cumulat ive 2005
Cumulat ive 2006
Cumulat ive 2007
Cumulat ive 2008
Cumulat ive 2009
Cumulat ive 2010
T
o
n
s
/O
z
o
n
e
S
easo
n
D
a
y
ESL-Single Family
ESL-Multifamily
PUC (SB7)
PUC (SB5 grant program)
SECO
Wind-ERCOT
Ozone Season Day NOx reduction level for 2010
(Preliminary Estimates)
ESL-Multifamily
2%
PUC (SB7)
27%
Wind-ERCOT
34%
ESL-Single Family
28%
SECO
9%
PUC (SB5 grant
program )
0%
Texas Wind Power Generation (Source: ERCOT 2005)
0
50,000
100,000
150,000
200,000
250,000
300,000
350,000
400,000
Jul- 01
Nov- 01
Mar- 02
Jul- 02
Nov- 02
Mar- 03
Jul- 03
Nov- 03
Mar- 04
Jul- 04
Nov- 04
W
in
d
P
o
we
r Ge
n
e
ra
ti
o
n
(
M
W
H
)
0
200
400
600
800
1,000
1,200
1,400
1,600
In
st
al
le
d
C
a
p
aci
ty
(
M
W
)
Wind Power Generation
Installed Capacity
•
New building models
use the DOE-2
simulation
•
Actual 1999 weather
data used to calculate
peak day for each
location
•
eGRID then calculates
emissions by PCA for
1999 and 2007.
p. 9
Energy Systems Laboratory © 2005
eCALC: Emissions Reductions Calculator
•
Municipal models use:
– DOE-2 simulations
for new buildings
– Component models
for street & traffic
lights
– Monthly utility billing
models for
before-after analysis
•
eGRID then calculates
emissions by PCA for
1999 and 2007.
•
Renewable tools use:
– F-CHART for solar
thermal
– PV F-CHART for
photovoltaics
– ASHRAE IMT utility
billing analysis for
wind energy
•
eGRID used to calculate
emissions by PCA for
1999 and 2007.
p. 11
Energy Systems Laboratory © 2005
eCALC: Solar Thermal Analysis Tool
•
User selects solar system
characteristics (i.e., type,
collectors, tilt, etc.).
•
eCALC calculates energy savings
from installation of solar system
using FCHART
•
Output from FCHART weather
normalized with ASHRAE IMT.
Coefficients fed to 1999 peak
extractor.
•
Peak extractor then calculates
1999 annual and peak-day energy
savings, which are fed to eGRID.
•
eGRID used to calculate 1999 and
eCALC: Solar Thermal Analysis
eCalc
eCalc
calculates energy savings
though F-CHART, allows to
analyze solar domestic hot water
and pool heating systems.
The output from F-CHART is weather
normalized with ASHRAE IMT. A
break-point linear regression
model as a function of outside
temperature fits very well the
thermal behavior of the solar
thermal systems.
Methodology
SDHW System Performance for Austin, TX
Ac=160ft
2
0
10
20
30
40
50
60
70
JAN
49.6
FEB
53.2
MAR
59.5
APR
68.5
MAY
75.2
JUN
81.7
JUL
84.6
AUG
84.7
SEP
79
OCT
70.2
NOV
59.2
DEC
52.3
Month of the Year and Average Outside Temperature [°F]
P
re
d
ic
te
d E
n
e
rgy
(
k
B
tu
/da
y
)
SDHW System Performance for Austin TX
Ac=160ft
2
89.04
0
10
20
30
40
50
60
70
40
45
50
55
60
65
70
75
80
85
90
95
Average Outside Temperature [°F]
P
re
d
ic
te
d E
n
e
rgy
(
k
B
tu/
da
y
)
p. 13
Energy Systems Laboratory © 2005
75,521
kWh
Annual Energy Savings
199
kWh
OSDavg
189.22
kWh
OSDpkChosen
Savings
•
User enters 12 months of
post-construction wind-generated
electricity data.
•
eCALC calculates performance
data for the wind energy system
using ASHRAE IMT.
•
Output from performance model
combined with 1999 wind data to
calculate annual and peak-day
electricity production for 1999.
•
eGRID used to calculate 1999 and
2007 emissions reduction by PCA
p. 15
Energy Systems Laboratory © 2005
eCALC
eCALC
: Wind Analysis Methodology
: Wind Analysis Methodology
Hourly Turbine Power vs. Wind Speed (Enertech)
0
10
20
30
40
50
0
5
10
15
20
25
30
35
40
45
On-site Wind Speed (M PH)
T
u
rb
in
e
Po
w
e
r (
k
Wh
/h
)
9/2001- 8/2002 Hourly Turbine Power vs.
On-site Wind Speed
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Date
M
onthl
y
P
e
rc
e
n
t
of
M
a
xi
m
u
m
C
a
p
a
ci
ty
-4
0
k
W
Predicted Average
Predicted 1999
Predicted 2000
Predicted 2001
Predicted 2002
kWh
Annual Total
Ozone Episode Period Peak Day
Average Daily Ozone Episode Period
189
34-day Ozone Episode Period Total
94,894
184
6,410
1999 Predicted Turbine Power
Electricity Produced by the Wind Turbine for
1999-2002 (Monthly Percent of Maximum Capacity)
•
Involve everyone!
– Stakeholders, Other State Agencies, EPA, DOE, etc.
•
Accuracy counts!
– All procedures developed must be accurate from
end-to-end (peer-reviewed).
– Weather normalization required for SIP Credits,
back-casting to base-year weather data allows for alignment with
EPA’s eGRID.
– Future projections require multiple discounts, degradation,
and growth factors.
– Integrated accounting across State Agencies allows for
State-wide, cumulative reporting to EPA.
•
Documentation important!
– EPA Quality Assurance Project Plan – QAPP.
p. 17
Energy Systems Laboratory © 2005
Jeff Haberl:
jeffhaberl@tees.tamus.edu
Charles Culp:
charlesculp@tees.tamus.edu
Bahman Yazdani:
bahmanyazdani@tees.tamus.edu
Tom Fitzpatrick:
tfitzpatrick@mail.utexas.edu
Visit the Calculator: “http://ecalc.tamu.edu”
Questions?