effective energy management in new existing buildings

22 June 2019

ASHRAE Energy Management Seminar--Exercises Supplement

EffectiveEnergyManagementinNew&ExistingBuildingsRichard J. Pearson, P.E., ASHRAE Fellow

Kyle Halverson, P.E. Kevin Little, Ph.D., editor

TableofContentsExercise 1: Energy Management Assessment ........................................................................................................................................... 3 Exercise 2: EUI and ECI ............................................................................................................................................................................ 6 Exercise 3: Portfolio Manager Facility Report .......................................................................................................................................... 8 Exercise 4A: Monthly Electric Utility Data............................................................................................................................................. 11 Exercise 4B: Monthly Gas Utility Data ................................................................................................................................................... 13 Exercise 5: Site Targeting Case ............................................................................................................................................................... 15 Exercise 6: System Improvement Target ................................................................................................................................................ 17 Exercise 7: Audit Level Examples ........................................................................................................................................................... 19

Exercise 9: Using Motor Logger Data .................................................................................................................................................... 30 Exercise 10A: Improving Energy Management Basics In Your Organization ........................................................................................ 32 Exercise 10B: Planning a discretionary facilities operation change ........................................................................................................ 34 Exercise 10C: Use ENERGY STAR®’s Assessment Matrix to rate one facility vs ENERGY STAR’s Energy Management Cycle ... 36 Exercise 10D: What will you do when you return to work next week? .................................................................................................. 37

Exercise 8: Discretionary Facilities Operations Checklist........................................................................................................................28

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Copyright 2013 by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE). All rights reserved. No part of this presentation may be reproduced without written permission from ASHRAE, nor may any part of this presentation be reproduced, stored in a retrieval system or transmitted in any form or by any means (electronic, photocopying, recording or other) without written permission from ASHRAE. ASHRAE has compiled this presentation with care, but ASHRAE has not investigated and ASHRAE expressly disclaims any duty to investigate any product, service, process, procedure, design or the like, that may be described herein. The appearance of any technical data or editorial material in this presentation does not constitute endorsement, warranty or guaranty by ASHRAE of any product, service, process, procedure, design or the like. ASHRAE does not warrant that the information in this publication is free of errors. The user assumes the entire risk of the use of any information in this presentation. Questions or comments about these exercises? Please contact Dick Pearson at [email protected] or Kyle Halverson at [email protected]. We look forward to hearing from you!

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Exercise1:EnergyManagementAssessment1. Name a building in your organization that might be a good candidate for energy management:_____________________________. 2. Use the checklist to evaluate the state of energy management for this building. Energy Management Accountability Check Notes 1. Energy use is measured

a. Monthly Yes No Not Sure b. Daily Bonus Yes No Not Sure c. Hourly Bonus Yes No Not Sure

2. Somebody is responsible to know what the energy

use is

a. Yearly Yes No Not Sure b. Monthly Yes No Not Sure c. Daily Bonus Yes No Not Sure

3. The responsible person can show you the energy

use by table or graph of

a. Yearly records Yes No Not Sure b. Monthly records Yes No Not Sure c. Daily records Bonus Yes No Not Sure d. Hourly records Bonus Yes No Not Sure

4. Somebody is accountable to actually make changes

to improve energy use. Yes No Not Sure

5. Somebody has planned, tested or deployed a

change in procedures or operating practices to improve energy use

a. In the last 90 days b. In the last 30 days

Yes No Not Sure Yes No Not Sure

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6. Somebody has checked performance of clocks, set-points, or other parameters using suitable probes and loggers

a. In the last 90 days b. In the last 30 days

Yes No Not Sure Yes No Not Sure

7. For the last major upgrade of equipment or

controls, somebody did a numerical “before and after” analysis to judge actual energy impact of the change.

Bonus The “before and after” analysis compared predicted energy impact to actual energy impact

Yes No Not Sure

Yes No Not Sure

8. The responsible person can get technical assistance

when s/he is not sure of the next energy management step, test or change (assistance can be internal or external).

Yes No Not Sure

9. A regular forum (meeting) is held at least monthly

to review energy performance and actions taken to use energy more intelligently—the responsible person has to give explanations based on numbers, in tables and graphs, not anecdotes.

Yes No Not Sure

10. A manager of the responsible person (the “boss”)

attends the review meeting described in 9.

Yes No Not Sure

Add up Yes, No and Not Sure Answers; enter as Total: ___ Yes ___ No ___ Not Sure Note: ENERGY STAR® has additional information and guidelines, available at https://www.energystar.gov/buildings/tools-and-resources/energy-star-guidelines-energy-management (Download Guidelines for Energy Management – 43 pages)

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PAGE LEFT INTENTIONALLY BLANK

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Exercise 2: EUI and ECI

Here is the summary of 12 months of energy use for the Great Dane pubs. Use the table and the definitions of ECI and EUI to answer the questions below. Choose the best response to complete the statements

1. The EUI for the Doty Street Pub in cell E15 is calculated by a. adding the energy in cells B12 and C13 and dividing by the area in cell

B15 b. changing kWh and therms for Doty Street to thousand BTU (kBTU),

summing the BTU values, and then dividing by the area in cell B15 c. taking the total cost in cell B13 and dividing by the area in cell B15.

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2. The ECI for the Doty Street Pub in cell F15 is calculated by a. adding the energy in cells B12 and C13 and dividing by the area in cell

B15 b. changing kWh and therms for Doty Street to thousand BTU (kBTU),

summing the BTU values, and then dividing by the area in cell B15 c. taking the total cost in cell D13 and dividing by the area in cell B15.

3. Doty Street’s ECI of $6.26 means that a new 10,000 square foot pub operating

with an EUI of 405 will have a) energy costs about $62,000 a year b) energy costs about half of Doty Street, if the utility costs are about the same c) can’t tell, it depends on the mix of equipment and utility uses at the new pub.

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Exercise3:PortfolioManagerFacilityReport The next two pages show an excerpt from a Statement of Energy Performance generated by Portfolio Manager for Garvey School.

Take a look at the document and answer the following questions. 1. Statement of Energy Performance (page 9 of this packet):

Which statements are correct in interpreting the Energy Performance Rating of 13? A. Garvey School uses more energy than 87% of schools in the EPA database

after accounting for size, equipment and climate differences. B. Garvey School uses more energy than 13% of schools in the EPA database

after accounting for size, equipment and climate differences. C. Garvey School’s score is too low for EPA ENERGY STAR recognition. D. Energy data from 2005 and 2006 were used to compute the rating.

Which statements are correct?

i. A, B, C ii. A, B, D iii. B, C, D iv. A, C, D

2. Energy Performance Comparison (page 10 of this packet): Using the evaluation period shown, read the statements and answer the question: Note: The annualized Energy Intensity figures are equivalent to the Energy Utilization Index (EUI).

A. The Energy Intensity of Garvey School is about half the Energy Intensity of a K-12 school with a rating of 75.

B. Compared to the national average of K-12 schools, the greenhouse gas emissions associated with Garvey School are about 40% higher.

C. The Energy Intensity for an average K-12 school is greater than a school with “75” rating but less than Garvey’s School.

D. The report table can handle both a baseline period and a current period. Which statements are correct?

i. A, B, C ii. A, B, D iii. B, C, D iv. A, C, D

You see that ENERGY STAR reports TWO types of energy intensity—site and source. We’ll explain this after we debrief the exercise.

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Exercise4A:MonthlyElectricUtilityData Rob is able to view the information on-line for each of the sites served by the local utility, Madison Gas and Electric; he can download the data into a spreadsheet, too. (Your utility may

provide a similar service.) Here is a view of a portion of the spreadsheet:

Explanation of column headings: A: Date the meter was read B: Number of days in the billing period; note that in this view the days can vary from 28 to 33 days. C: Many commercial and industrial facilities have to pay a demand charge for electrical service. Customer Maximum Demand (in kilowatts, kW) is the maximum average power used by Doty Street in any 15 minute block for the previous 12 months and the Great Dane pays a charge for this annual peak demand. Check with your local utility on how they assess demand charges. (See also Chapter 36, p. 36.3 of the 2015 ASHRAE Handbook: HVAC Applications for more information about electric utility rates.) D: This column gives the day of the maximum 15-minute demand in the previous 12 months. E: This column gives the monthly maximum demand for the billed period. The Great Dane pays a charge for the monthly peak demand. F: This column gives the total energy in kilowatt-hours for the billed period. G. This column normalizes the total energy for the billed period by the number of days

in the billed period. H. The dollar amount for the bill.

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Here is a set of graphs for the three years of electric energy use.

Use the display to judge the following statements 1, Doty Street uses about 20 to 30% more electric energy in summer months than winter months. 2. The peak monthly demand (kW) occurs either in July or August for 2006-2008. 3. Starting in June of 2008, Doty Street is using more energy than 2006 or 2007. 4. If we expect air conditioning to drive a lot of energy use, there are no surprises in these graphs. Which statements are supported by the graphs?

a) 1, 2, 3 b) 1, 2, 4 c) 1, 3, 4 d) 2, 3, 4

800007000060000

2800

2400

2000

DecNovOctSepAugJulJunMayAprMarFebJan

160140120

kWh

kWh/Day

Month Max Dmd (kW)

200620072008

Year

Doty Street Electric Energy Use 2006-2008

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Exercise4B:MonthlyGasUtilityDataDoty Street has two gas meters, one for the main facility and a second one for the pool room. Here is a table that shows all the gas used by Doty Street 2006-2008, after spreadsheet work to add the data from the two meters.

Here is an explanation of the columns: N: Date the meters were read (both meters read the same day each month) O: Number of days in the billing period; note that in this view the days can vary from 29 to 32 days. P: Number of therms of gas energy used (gas meters actually measure the volume in cubic feet; a conversion factor is applied to give the energy content of the volume used by the customer.) Q: Heating Degree Days measure how cold each billing period has been.

Why might you want this extra information? To judge whether you have saved energy from one winter to the next, you have to account for how cold each winter has been. It might look like you have saved a lot of energy one winter but actually the winter was relatively mild. To calculate heating degree days for a billing period, we calculate the heating degree days for each day. Let the average daily temperature (degrees F) of day D be written as TD. The heating degree days (HDD) for day D are defined relative to a reference average temperature; in this case, the reference temperature is 65 degrees F. If TD > 65, then HDD = 0. Otherwise, if TD≤ 65: HDD for day D = 65 – TD (There is a complementary definition to rate the warmth of a day, called Cooling Degree Days. The standard definition also uses 65 degrees F as the reference average temperature. )

To get the HDD value for a billing period, the utility adds up the HDD value for each day in the billing period.

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R: Dividing the therms by HDD accounts for how cold a month has been as well as the number of days in the billing period. Usually, we will only count the winter months October through April; the NA means “not applicable” or “not available”. S: Dollar amount. T: Therms per day—to help us understand base use as the brewing operation and kitchen uses gas year-round in addition to space heating. Here is a set of graphs of Doty Street gas energy use, 2006-2008

Use the graphs to judge the following statements 1. The number of heating degree days per month does not predict gas use very well. 2. February 2006 was a lot warmer than the other two years. 3. If we expect space heating to drive a lot of gas energy use, there are no surprises in these graphs. 4. Doty Street uses less than half as much gas energy in summer months relative to winter months. Which statements are supported by the graphs?

a) 1, 2, 3 b) 1, 2, 4 c) 1, 3, 4 d) 2, 3, 4

10000

7500

5000

300

200

100

DecNovOctSepAugJulJunMayAprMarFebJan

1600

800

0

Therms

Therms/Day

Heating Degree Days

200620072008

Year

Doty Street Gas Energy Use 2006-2008

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Exercise5:SiteTargetingCaseHere is the summary of 12 months of energy use for the three Great Dane pubs; the pubs are all served by the same utility and pay the same unit costs for energy. Use the table to answer the questions.

The three pubs in order of EUI (low to high) are Doty Street, Fitchburg, and Hilldale. a. Hilldale as the smallest pub regardless of energy use should always have

the greatest EUI since you divide energy use by its area and it is the smallest facility.

b. Hilldale uses less energy than Doty Street and Fitchburg but is a more intense user of energy compared to the other two pubs.

c. The EUI for Hilldale is about twice the EUI of Doty Street. Which statements are true? I) a and b II) b and c III) a and c IV) all are true

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The three pubs in order of ECI (lowest to highest) are Doty Street, Fitchburg, and Hilldale.

a. Hilldale has the highest EUI and must have the highest ECI, too, since all facilities have the same utility rates..

b. Hilldale pays less for energy than Doty Street and Fitchburg but requires more sales to cover its energy costs compared to the other two pubs.

c. The ECI for Doty Street is about half the ECI of Hilldale. Which statements are true?

I) a and b II) b and c III) a and c IV) all are true

Based just on the energy table calculations, which pub seems to be a good initial target for energy efficiency?

a. Doty Street b. Fitchburg c. Hilldale

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Exercise6:SystemImprovementTarget Here are results from a walk-through of the Hilldale facility (electric

energy totals derived from estimates of lighting or equipment power usage x hours of use)

Which major systems account for more than 75% of the electric energy use at Hilldale?

a. Lighting, Refrigeration and Brewing b. Lighting, HVAC and Refrigeration c. Lighting, HVAC and Brewing

No July 07-Jun 08

MajorSystems kWh/yr $/yr Percent therms/yr $/yr PercentLighting 129,410 $12,294 24.2%HVAC 144,627 $9,401 27.0% 9,700 $9,438 19.7%

Office Equipment 0 $0 0.0%Refrigeration 141,042 $13,399 26.4%

Brewing 75,799 $7,201 14.2% 5,269 $5,127 10.7%Cooking 44,806 $8,380 8.4% 22,651 $22,039 46.0%

Domestic Hot Water 0 $0 0.0% 7,720 $7,512 15.7%Miscellaneous 0 $0 0.0%Systems Total 535,684 $50,675 100.2% 45,340 $44,116 92.0%

Utility Bills 534,720 $54,945 100.0% 49,275 $50,636 100.0%Unaccounted (964) $4,270 -0.2% 3,935 $6,520 8.0%

Building sf - 8,300 $6.62 $/sf/yr Elec $/sf/yr Gas - $6.10 mBtu/sf/yrBuilding indices - 64.42 kWh/sf/yr 5.94 th/sf/yr 813.87

Hilldale PubData Date Range

Electricity Use - Estimated Gas Use - Estimated

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Compare estimated use at the three facilities to answer the question that follows the table.

a. More energy is used for lighting at Hilldale than at the other pubs b. On a per square foot basis, Hilldale uses about twice as much energy for the three

major systems as Doty Street. c. For the three major systems, it costs more to run Hilldale than the other sites. d. For the three major systems, it costs more to run Hilldale on a per square foot

basis. Which statements are true?

1. a, b, c 2. a, b, d 3. a, c, d 4. b, c, d 5. all are true

The site walk-throughs indicated these total watts of lighting installed at the three sites: Doty Street: 19 kW Fitchburg: 19 kW Hilldale: 20 kW True or False? On a per square foot basis, Hilldale has much greater lighting intensity (measured as watts/sq ft), consistent with the greater energy use for lighting at Hilldale compared to the other sites.

July 07 to Jun 08Lighting HVAC Refrigeration Total

Doty St 112,753 175,065 306,208 594,026 kWh22500 sf $10,712 $16,631 $29,090 $56,433

14.6% 22.6% 39.6% 77% pct of total ele

Fitchburg 118,045 190,351 145,362 453758 kWh11600 sf $11,215 $18,083 $10,500 $39,798

17.3% 27.9% 21.3% 66% pct of total ele

Hilldale 129,410 144,627 141,042 415079 kWh8300 sf $12,294 $9,401 $13,399 $35,094

24.2% 27.0% 26.4% 78% pct of total ele

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Exercise7:AuditLevelExamplesAudit of a Military Base Building, Okinawa, Japan Read the audit report’s Executive Summary to answer the questions. Pay particular attention to the paragraph preceding Table 1. (The Table of Contents is included for reference.) 1. Here are five statements that include major elements of ASHRAE Audits II and III

A. The audit has an analysis of current energy use B. The audit outlines the costs and savings of major energy efficiency measures

(EEMs) C. Specific operations and maintenance recommendations are listed in the Table

of Contents D. Capital project recommendations are given (with costs and savings). E. The report offers detailed analysis of capital projects, including energy

simulations to justify recommendations. Which statements are supported by the Executive Summary?

i. A, B, C, D ii. A, B, C, E

iii. A, C, D, E iv. B, C, D, E v. All statements are supported by the documentation.

2. Based on your review, which choice best describes the audit represented by the

documentation? a. Level II Audit

Or b. Level III Audit

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Executive Summary Building 5679 is a 45,140 sq. ft., two story, reinforced concrete structure built in 1991, serving as a library on the first floor, and classrooms on the second floor. A separate single zone constant volume air handling system serves each floor. Both air handling systems are served by a chilled water plant, consisting of two air cooled chillers. In March and April 2001, a team of two people from Pearson Engineering conducted an on‐site energy audit of this facility. We observed occupancy and usage. We measured lighting levels, indoor and outdoor temperature and relative humidity. We took detailed measurements at the air‐handling units, including airflow, entering and leaving air temperature and relative humidity, and fan motor amps and volts. We observed and recorded the position of manual dampers. Portable data loggers were installed during July and August 2001 to continuously record supply air temperature and return air temperature and relative humidity, for a period of approximately 1 week on the air handling units. The second floor classrooms have significantly variable occupancy, providing good potential to develop a variable air volume system, with an individual VAV box serving each classroom. A general observation is that chiller capacity and air handling unit capacity is more than adequate to cool this building, but that airflow is so high that the cooling coils barely remove any moisture. The result is acceptable room temperatures, in the mid 70s (°F), but with very high relative humidity (65% to 70%). The library utilizes 14 portable dehumidifiers in an unsuccessful attempt to control relative humidity. Prior to our on‐site analysis, we reviewed drawings and simulated building energy consumption using the Trane “TRACE 700” simulation program. During the on‐site analysis, we fine‐tuned the input to the energy simulation. We were able to simulate the building to within 10% of the actual electrical usage. We then used our on‐site analysis and the energy simulation program to evaluate various Energy Efficiency Measures (EEMs). Each EEM was simulated as an independent project, while the values in Figures 1 and 11 are the result of simulating all EEMs together. The resulting interaction provides different values than simply adding up the sum of energy savings for each EEM. From this work, we have developed a package of EEMs which can be practically and cost‐effectively applied to this building. These are summarized as follows:

Description Estimated Cost $ EEM‐1 AHU Variable Frequency Drives $63,100 EEM‐2 Replace Chilled Water Pump $3,500 EEM‐3 Chilled Water Setpoint OA Reset $5,000 EEM‐4 Lighting Retrofit $47,234 Detailed Engineering $20,000 Total Implementation Cost $138,834

Figure 1: EEM Costs Building 5679 Library The estimated annual energy saved by this package of Energy Efficiency Measures is

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256,966 kWh, a reduction of 30%. At the present cost of 16.6 ¢/KWH, the annual savings will be $42,656, resulting in a simple payback of 3.25 years. EEM‐1 which includes variable frequency drives on the supply fans and revised control strategies for the cooling coils, will not only increase the energy efficiency of the fan systems, but will also maintain an acceptable relative humidity within the building at all times. Pearson Engineering acknowledges considerable cooperation and assistance of numerous personnel in the collection of data for this analysis. Specific thanks are extended to personnel in the Camp Foster Utilities Office, including: Mr. John Whittle Mr. Kiyuna Mr. Ishikawa Mr. Kawabata Staff Sgt Delgado Rodriquez

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Table of Contents (continued)

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Audit of a University Campus Building, Madison, WI Lowell Hall Energy Audit Report Read the Executive Summary to answer the questions. The Table of Contents is also provided for reference. 3. Here are five statements that include major elements of ASHRAE Audits II and III

A. The audit includes an analysis of current energy use B. The audit outlines the costs and savings of major energy efficiency measures

(EEMs) C. A specific operations and maintenance recommendation is included in the

Executive Summary D. Capital project recommendations are given (with costs and savings). E. The report offers detailed analysis of capital projects, including energy

simulations to justify recommendations. Which statements are supported by the Executive Summary?

i. A, B, C, D ii. A, B, C, E

iii. A, C, D, E iv. B, C, D, E v. All statements are supported by the documentation.

4. Based on your review, which choice best describes the audit represented by the

documentation? a Level II Audit

Or b Level III Audit

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Table of Contents (continued)

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Exercise8:DiscretionaryFacilitiesOperationsChecklistDirections: Check off actions you would like the instructor to discuss further (More? column). We’ll take a quick poll of participants as our guide. Use the Notes column to flag actions you want to investigate when you return to work. (See slides 149-158 and refer to ASHRAE Standard 100 Informative Annex E for more energy efficiency measures) More? Discretionary Facilities Operation Actions Notes for your buildings

Lighting • Match operating hours to activities

• Replace lamps with LED or low-wattage fluorescent

• Take advantage of daylight

• Check delays on Occupancy Sensors

• Assure appropriate Foot-candles(lumens)

Fans • Match running time to activities

• Lower hot air temperatures

• Raise cold air temperatures

• Lower static pressure set-pointso Manual reset

o Dynamic reset using damperpositions

• Minimize outside air quantities andclose dampers when unoccupied

• Minimize exhaust quantities

• Match ventilation to number ofoccupants

• De-energize exhaust fans and closeOA dampers when unoccupied

• Make best use of economizeroperation

• Eliminate simultaneous heating andcooling

• Convert constant volume systems tovariable volume, even if single-zone

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More? Discretionary Facilities Operation Actions

Notes for your buildings

Pumps • Match running time to activities

• Verify proper flowo Throttle balance valves

o Trim pump impellers

• Lower pressure set-point to optimize variable flow

o Manual reset

o Dynamic reset

• Convert CV system to variable flow Boilers • Lower hot water temperatures

• If steam, lower steam pressure

• Optimize boiler sequencing

• Minimize losses in de-energized boilers

Chillers • Match running time to activities

• Raise chilled water set-points

• Reduce condenser water temperature

• Optimize cooling tower fan speed

• Optimize chiller staging

• Minimize chiller cycling

• Reduce chilled water flow

Other Systems

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Exercise9:UsingMotorLoggerData A stand-alone “Motor On/Off” logger was placed on the compressor motor controls to track when the Doty Street walk-in freezer compressor turned on and shut off.

Compressor motor; controls and logger (below)

Here is a portion of the record for 24 hours. The logger records the time when the motor comes ON and turns OFF. The compressor is scheduled to shut off for defrost 30 minutes out of every 4 hours. This motor is running essentially constantly to maintain the temperature in the freezer, 21 hours a day. The motor draws 3 kW of power. The kWh charge by the utility is 10 cents per kWh; each kWh is associated with 2 pounds of CO2 in the pub’s service territory.

Question: If the freezer can be rebuilt so that the compressor only runs 11 hours a day, what savings does this produce annually (365 days) in energy, dollars and associated pounds of CO2? Energy Savings: ______________ Dollar Savings: __________________ CO2 Savings: ________________

Time of State Change

Motor State

(1=ON)7/1/2008 0:26 07/1/2008 0:58 17/1/2008 4:26 07/1/2008 4:56 17/1/2008 8:26 07/1/2008 8:53 17/1/2008 12:26 07/1/2008 12:58 17/1/2008 16:26 07/1/2008 16:56 17/1/2008 20:26 07/1/2008 20:56 17/2/2008 0:26 0

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Exercise10:PlanningExercises Now is the time to reflect on our seminar and begin to plan how to improve Energy Management in your organization. Options to develop your intentions for action after the ASHRAE Meeting Exercise 10A helps you identify beginning actions to organize and review energy performance data. Exercise 10B helps you begin to plan a test of a discretionary facility operations change. Exercise 10C applies the ENERGY STAR® facility assessment matrix, using all the steps of the Energy Management Cycle. Everyone needs to summarize and prepare a short report out to the session: Exercise 10D is a simple summary of your intentions when you return to work after the ASHRAE Meeting.

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Exercise10A:ImprovingEnergyManagementBasicsInYourOrganizationWhat is true about the fundamentals of Energy Management in your organization? Select some actions to begin to apply the concepts and methods presented in this seminar.

If this is true about Energy Management in your

organization…

Consider these actions…

1. Your management does not know about the potential impact of Energy Management on the bottom line and the environment

Share the content of slides 34-46 with one or more managers and gauge their interest.

2. Your organization does not maintain graphs and tables of monthly utility costs, building by building

Get a copy of 24 months of recent utility bills and understand the rate structure. Find out about web access to utility bills --does it exist for key buildings? --If yes, sign up for access Organize the 24 months of bills in a spreadsheet and calculate the EUI and ECI for the past two years (see slide 63). If you have two or more buildings in your table, does any building jump out as a candidate for initial focus? Share your analysis with one or more managers.

3. Your organization does not already track energy performance using ENERGY STAR®’s Portfolio Manager.

Sign up for a Portfolio Manager account. https://www.energystar.gov/buildings/facility-owners-and-managers/existing-buildings/use-portfolio-manager (see slides 67-91) Enter description and utility data for one building that appears to be a poor performer. If the building type provides a rating, look at the building’s rating: --If less than 25, there are many opportunities that may be obvious

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--If greater than 75, check that you entered the information correctly. If confirmed, consider applying for ENERGY STAR recognition! If the building type does not provide a rating, you still may judge the weather normalized EUI relative to median U.S. performance of similar buildings. Share your analysis with one or more managers.

4. Your organization has interval data for one or more meters but no one regularly studies the interval information

Using a spreadsheet program, make a table and graph of the last week of the interval data for one meter. Verify that the pattern of use (peaks and valleys) corresponds to the hours of operation or use related to the meter. (See slides 104-108) Do you understand what the graph is trying to tell you? Share your analysis with one or more managers.

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Exercise10B:Planningadiscretionaryfacilitiesoperationchange

1. Return to the checklist of discretionary facilities operation (Exercise 9, page 32-33 in this section.)

2. Choose one action that looks promising for a specific building you know. Action Building Name

3. Rate your management’s commitment to sustained energy management

___No Commitment ___Some Commitment ___Strong Commitment

4. Rate your degree of belief that the change action will lead to improved energy use (place an X on the scale)

5. Estimate the cost of failure in deploying this change—what are the costs if the change doesn’t work as planned? (place an X on the scale).

6. Apply the Scale Table, using your answers to questions 2, 3, and 4. Deciding on the Scale of a Test Current Commitment within Your Organization

Belief in effectiveness

Failure Cost No Commitment

Some Commitment

Strong Commitment

Low degree of belief that

change idea will lead to

improvement

Cost of failure large

Very small-scale test



Cost of failure small


Very small-scale test Small-scale test

High degree of belief that

change idea will lead to

improvement

Cost of failure large

Very small-scale test Small-scale test Large-scale test

Cost of failure small

Small-scale test Large-scale test Implement

(source: Table 7.1 G. Langley et al. (2009), © Associates in Process Improvement, used with permission.)

Large Small

Low High

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How big a test might you plan with this change?

a. Very small-scale (less than a couple of hours) b. Small-scale (a couple of hours to a couple of days) c. Large-scale (a couple of days to a couple of weeks) d. Just implement the change, don’t test it.

7. How will you measure/verify the impact of your change? Check all that apply.

Note: To detect the impact of your change on energy use, you need to measure more frequently than the scale period.. __ monthly building utility bill __ monthly summary from building sub-meter __ daily energy record __ hourly or better interval data __ special data logger __ calculation (e.g. for electrical devices, average measured power x hours of

operation)

8. Do you have enough information to predict the energy impact of your change? a. If YES, what is your prediction?

b. If NO, what could you do to build your knowledge to estimate the impact?

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Exercise10C:UseENERGYSTAR®’sAssessmentMatrixtorateonefacilityvsENERGYSTAR’sEnergyManagementCycleIf you can access the Internet, you can use an interactive Assessment Matrix to compare Energy Management at one facility to “best practices” summarized by the EPA, aligned with all the steps of the Energy Management cycle. Go to www.energystar.gov and type Facility Assessment Matrix in the search box. The Excel file listed first should be the assessment tool. Alternatively, go to https://www.energystar.gov/buildings/tools-and-resources/facility-energy-assessment-matrix-excel and select Download the Facility Energy Assessment Matrix.

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Exercise10D:Whatwillyoudowhenyoureturntoworknextweek?Write down what you will do first to improve the state of Energy Management in your organization. Be prepared to share your plans with other seminar attendees.

1. What I will do next week:

2. Why I will do it:

3. Who do I need to engage to help me do it?

effective energy management in new existing buildings

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