Building Energy Modeling Professional (BEMP)

Transcription

1 ASHRAE beq Program

2 Amanda Bogner President, Energy Studio KU Architectural Engineering Licensed Mechanical Engineer LEED AP BD + C, Certified LEED Reviewer Vice-chair USGBC s EA Technical Advisor Group (EA TAG) Building Energy Modeling Professional (BEMP)

3 Alexander Skillman Energy Analyst, Energy Studio PKI Architectural Engineering, MAE UNO MBA, focus on sustainable business Licensed Mechanical Engineer LEED AP BD+C, O+M Building Energy Assessment Professional (BEAP)

4 Energy Studio Company BHAG: In 15 years, save our clients as much energy as New York City uses in one year.

5 What s so important about energy efficiency?

6 A Historic Opportunity As of 2010, total US building stock = 275 billion SF Every year, we Tear down 1.75 billion SF Renovate 5 billion SF Build new 5 billion SF Source:

7 A Historic Opportunity By 2035, 75% of the built environment will be either new or renovated.

8 Professional Responsibility? Who is going to ensure that the 75% of new or renovated spaces are energy efficient?

9 Energy Benchmarking

10 What is Benchmarking? Measuring how much energy a building consumes and comparing that against other buildings

11 Benchmarking Policies

12 Why Benchmark? Save money, cut waste Make your city smarter Support local economy

13 ASHRAE beq Program

14 beq Program Developed by ASHRAE Two-part As Designed In Operation Compliments other certification programs: LEED Green Globes Energy Star

15 beq vs. Energy Star beq Allows a wider range of buildings to apply ENERGY STAR is a pass/fail rating -- either you get it or you don't. beq places increased emphasis on zero net energy Source:

16 beq vs. Energy Star beq is not a recognition program It focuses on improvement providing owners information so that they can improve their buildings! Source:

17 beq Applicability As Designed 8 building types in 3 categories: Office Food Sales Retail

18 beq Applicability In Operation 46 building types in 13 categories: Office Public Order/Safety Education Nursing Service Warehouse Food Sales Laboratory Public Assembly Food Service Lodging Healthcare Retail

19 beq Application Requirements ASHRAE certified professional (BEMP, BEAP) Or, Licensed engineer (in building s location) And, Registration fee Normalized energy model (As Designed) months of utility data (In Operation) On-site assessment Completed workbooks

20 beq Scale Scale Range Rating Description 0 A+ Zero Net Energy 1-25 A High Performance A- Very Good B Efficient C Average D Inefficient >145 F Unsatisfactory Source:

21 Source:

22 beq As Designed

23 beq As Designed Compares predicted source EUI to CBECS data For buildings less than 12-months old Adapted ASHRAE Performance Rating Method Standardized Inputs Schedules Internal gains

24 Median EUI Found using ENERGY STAR s Target Finder (being phased out) Standardized Input values Focus on SOURCE EUI; not Site EUI

25 Zip Code Floor Area Target Finder Input Grocery Office Retail Project Specific Project Specific Weekly Operating Hours FTE 1 / 1000 SF 2.3 / 1000 SF 1/ 1000 SF # of PCs / 1000 SF 0.2 / 1000 SF # Cash Registers / 1000 SF % AC 100% > 50% 100% % Heated 100% > 50% 100% Exterior Entrance? - - Yes # Walk-in Refrig/Freezer Units 0.25 / 1000 SF - # of Open or Closed Refrig/Freezer Units - - On-site Cooking? Yes - - Project Specific Project Specific

26 ASHRAE 90.1 PRM Adaptation Similar to modeling Proposed Case for LEED Thermal Blocks Envelope Lighting HVAC Service Water Heating No Baseline model created

27 Standardized Inputs Defined in As-Designed Modeling Input Workbook Operation Schedules Similar to schedules ASHRAE User s Manual Internal Loads Occupancy Plug Load Infiltration Temperature Set Points

28 Standard Schedules Occupancy Exterior Lighting Plug Loads HVAC Fan Operation Interior Lighting Elevator Service Water Heating Ventilation Infiltration

29 Copyright 2012 ASHRAE, Inc. (Updated 5/10/2013) BUILDING TYPE: GENERAL OFFICE STANDARDIZED SCHEDULES FOR CANDIDATE BUILDING MODEL Standardized Variable Day Type Mo Start Mo End 12-1am 1-2am 2-3am 3-4am 4-5am 5-6am 6-7am 7-8am 8-9am 9-10am 10-11am 11-12pm 12-1pm 1-2pm 2-3pm 3-4pm 4-5pm 5-6pm 6-7pm 7-8pm 8-9pm 9-10pm 10-11pm 11-12am Weekday Jan Dec Occupancy % of Maximum Load Sat Jan Dec Sun Jan Dec Holiday Jan Dec Weekday Jan Dec Off Off Off Off Off Off On On On On On On On On On On On On On On On On Off Off HVAC On/Off Sat Jan Dec Off Off Off Off Off Off On On On On On On On On On On On On Off Off Off Off Off Off Sun Jan Dec Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Holiday Jan Dec Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Weekday Jan Dec Interior Lighting % of Maximum Load Sat Jan Dec Sun Jan Dec Holiday Jan Dec Exterior Lighting On/Off All Jan Dec Off Off Off Off Off Off On On Off Off Off Off Off Off Off Off Off Off On On On On On On Weekday Jan Dec Elevator % of Maximum Load Sat Jan Dec Sun Jan Dec Holiday Jan Dec Weekday Jan Dec Service Water Heating % of Maximum Load Sat Jan Dec Sun Jan Dec Holiday Jan Dec Weekday Jan Dec Plug Loads % of Maximum Load Sat Jan Dec Sun Jan Dec Holiday Jan Dec Weekday Jan Dec On On On On On On Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off On On Infiltration On/Off Sat Jan Dec On On On On On On Off Off Off Off Off Off Off Off Off Off Off Off On On On On On On Sun Jan Dec On On On On On On On On On On On On On On On On On On On On On On On On Holiday Jan Dec On On On On On On On On On On On On On On On On On On On On On On On On Weekday Jan Dec Off Off Off Off Off Off On On On On On On On On On On On On On On On On Off Off Ventilation On/Off Sat Jan Dec Off Off Off Off Off Off On On On On On On On On On On On On Off Off Off Off Off Off Sun Jan Dec Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Holiday Jan Dec Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off Off

30 Occupancy Schedule Plug Load Schedule Interior Lighting Schedule Exterior Lighting Schedule

31 Standardized Inputs Category General Office Medical Office Plug Loads Occupancy Heat Rate Min Ventilation W/SF SF/person Sensible Latent Off On Max Infiltration On (ach) Off (ach) Retail Grocery

32 Standardized Inputs Category General Office Medical Office Service Water Heating Load [Btu/hr/person] On Off Heating Set Point Temperature Set Points Heating Set Back Cooling Set Point Cooling Setback Retail Grocery

33 Hot Tip s Build a library Schedules Standardized Inputs When in doubt, use these as starting points in any modeling work

34 Case Study

35 Owner Goals 36,000 SF Office + 31,000 SF Warehouse/Parking Preserve the existing building Create a healthy space for workers 50% better than ASHRAE LEED Platinum

36 Source: Integrated Architecture Pre-design Energy Cost Savings = 22.34%

37 Envelope Study Evaluated: Glazing quantity Glass performance Wall performance Roof performance Reported Total energy cost savings Total energy consumption savings Peak heating and cooling load reduction Daylight potential

38 Additional Studies Evaluated mechanical system performance Packaged DX RTUs w/ VAV boxes Packaged DX RTUs w/ UFAD Exhaust air energy recovery Demand controlled ventilation

39 Final Energy Cost Savings = 45.11% Source: Integrated Architecture

40 Energy Conservation Measures Significant envelope improvements Wall = R-25 Roof = R-30 WWR = 19.5% Glass: U-0.4, SHGC = 0.29, 0.21 (frit) Roof monitors; 1% of roof area Lighting: LED, occupancy sensors, daylight harvesting Average installed LPD = 0.46 W/SF

41 Energy Conservation Measures 93% efficient service water heaters Low-flow fixtures = 45% reduction in hot water demand Packaged RTUs w/ UFAD Nothing special 94.5% efficient condensing boiler

42

43 Energy Consumption [MMBtu] Predicted Elec Predicted NG Normalized Elec Normalized NG

44 Find Median EUI Median EUI Office in Grand Rapids, Michigan Zip Code = ,300 SF Operation = 65 hours/week # of computers = 159 # of people = 166

45 Annual Energy Use by Fuel Type FORM 2 - ENERGY CALCULATIONS FOR AS DESIGNED RATING Modeled Standardized Energy Use Information and Rating Calculation Value Units Conversion Factor Site Energy - kbtu Source-Site Ratio Source Energy (kbtu) Electricity kwh ,408, ,704,313 Natural Gas Therm 100 1,510, ,580,970 Fuel Oil LPG kbtu Steam kbtu Hot Water kbtu Chilled Water kbtu Wood / Biomass kbtu Coal/Coke kbtu Other kbtu TOTAL BUILDING ENERGY USE 2,918,477 6,285,283 Qualified Renewable Energy Percent Qualified Upstream Renewable Energy: 0% NET ENERGY USE 2,918,477 6,285,283 Gross Floor Area 87,104 Modeled Standardized EUIs (kbtu/ft 2 -yr) Site EUI: 33.5 Source EUI: 72.2 Building Type Office Median EUI: BuildingEQ Rating A- Very Good (Source/Median)*100: 29.9 Additional Modeled Standardized Electrical Information Modeled Peak Electric Demand (kw) 157 Month of Peak: July

46

47 As Design Conclusions Easy to do for LEED projects If not LEED, may require 1+ weeks to model design Limited building types

48

49 beq In Operation

50 Process Obtain months of utility data Owner survey / questionnaire ASHRAE Level 1 walk through Documentation Follow-up

51 Utility Data Request access from owner Online access Copies from accounting department Other sources? Maintain data in Portfolio Manager

52 Owner Survey General Questions Has any commissioning activity been completed? Is any mechanical equipment no longer in use? What is the typical usage schedule for the building in a normal week?

53 Owner Survey Thermal Comfort Identify areas that are uncomfortable Identify areas with drafts or high airspeeds Identify area with humidity concerns

54 Owner Survey Interior Lighting Identify areas with too much or too little light Identify areas with glare

55 Owner Survey Acoustics Identify areas with potential background noise Identify areas that lack acoustical privacy

56 Owner Survey System Operation Identify systems that have been troublesome to operate Identify systems that require unusual amounts of service Calibrate to owner s expectations

57 ASHRAE Level 1 Audit Basic walkthrough of building Focuses on visible elements and major components May lead to Level 2 or Level 3 audits

58 ASHRAE Level 1 Audit Main goals Interview with owner/operator Identify no-cost or low-cost enhancements Identify higher cost items for future studies Provide energy benchmark Helps confirm success of enhancements

59 Data Collection For a variety of locations in the building: Air flow and velocity Air Temperatures Relative Humidity CO2 Sound Pressure Foot-candle level Surface Temperatures TVOC CO

60 Analysis Is the building operating as intended? It s easy to reduce energy by sacrificing thermal comfort or indoor air quality What end-uses are significantly different from predicted or reference building?

61 Analysis What is In Operation Rating? Identify likely candidates for building enhancement Cost estimates for enhancements

62 Documentation beq In Operation Workbook Metered Utility Data Project photos

63 Normalized Baseline Workbook adjusts CBECS Source EUI Weather Based on actual HDD & CDD Location; using climate zone Occupancy Actual HDD & CDD found at:

64 Follow-up Provide owner beq report Results Suggestions for improvement Second beq submittal 24 months later

65 Case Study

66

67 Case Study Utility data: receive from accounting department for first 5 years of operation Scheduled walkthrough for January 2015 Data collection Visual inspection

68 Energy Consumption [MMBtu] Actual Elec Actual NG Predicted Elec Predicted NG

69

70

71

72

73

74

75

76

77 FORM 1 - BUILDING CHARACTERISTICS FOR IN OPERATION RATING Building Name: Sample Assessment Date: 1/15/2015 Address: Sample City: Grand Rapids State/Prov: Michigan Zip/Post: Building Owner: Sample Owner Building Type: Administrative/professional office Building Contact/Title: Sample Owner Contact Phone: Address: Sample Address City: Grand Rapids State/Prov: Michigan Zip/Post: Assessor/Company: Alexander Skillman/Energy Studio, Inc. Phone: Address: W Dodge Road askillman@energystudi oinc.com City: Omaha State/Prov: Nebraska Zip/Post: Climate Data DOE Climate Zone: 5A HDD65: 7487 CDD50: 2805 Period of Data: Source of Climate Data: Building Characteristics Gross Floor Area (ft 2 ): 72,300 Total Conditioned Area (ft 2 ): 58,900 Conditioned Area, heated only (ft 2 ): 0 Conditioned Area, cooled only (ft 2 ): 0 12/17/ /17/2014 Number of Conditioned Floors: 2 Floors Above Grade: 2 Floors Below Grade: 0 Original Year of Construction: 2013 Hours of Operation: Average Brief Building Description: This building serves as the headquarters building for a Rockford Construction, a construction services provider based in Grand Rapids, MI.

78 FORM 2 - ENERGY CALCULATIONS FOR IN OPERATION RATING Utility Information and Rating Calculation Annual Energy Use by Fuel Type Value Units Conversion Factor Site Energy - kbtu Source-Site Ratio Source Energy (kbtu) Billed Energy Cost - $$ Electricity 453,000 kwh ,546, ,854,719 $52,082 Natural Gas 42,642 CCF 103 4,392, ,611,732 $34,034 Fuel Oil LPG U.S. Gallon Steam 1000 lb Hot Water kbtu Chilled Water Ton-Hour Wood / Biomass Ton Coal/Coke Ton Other kbtu TOTAL BUILDING ENERGY USE 5,938,215 9,466,452 Qualified Renewable Energy Percent Qualified Upstream Renewable Energy: 0% NET ENERGY USE 5,938,215 9,466,452 $86,117 Gross Floor Area 72,300 Metered Building EUIs (kbtu/ft 2 -yr) Site EUI: 82 Source EUI: 131 Building Type Administrative/professional office Source Median EUI: 174 BuildingEQ Rating B Efficient (Source/Median)*100 75

79 A- AS DESIGNED B IN OPERATION In Operation

80 Next Steps Re-evaluate the daylight harvesting system Are the set points correct? Are lamps allowed to dim and shutoff correctly? Reviewing controls; why is there cooling occurring during heating season? Address VOC issue near workshop

81

82 Contact Us! Amanda Bogner Alexander Skillman