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TEMPLATE OF ENERGY AUDIT REPORT

By Gail Tucker,2014-12-28 10:24
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TEMPLATE OF ENERGY AUDIT REPORT

    GUIDELINES FOR PRELIMINARY ENERGY AUDIT REPORT

    1. Cover Page

; Report title

    ; Name of client (company for which facility or building has been audited)

    ; Location of facility or building

    ; Date of report

    ; ESCO

    ; ESCO KQP and project officers and their designations

    2. Executive Summary

All information in the Executive Summary should be drawn from the detailed

    information in the full report. The Executive Summary should contain a brief

    description of the preliminary audit including:

    ; Name of client, location of facility or building audited ; Objective of audit

    ; Dates of preliminary audit

    ; Key systems and equipment studied

    3. Table of Contents

; Introduction

    ; Overview of current systems in place

    ; Scope of work for energy audit

    ; Recommendations and the associated costs and savings ; Conclusions

    4. Introduction

; Objectives of preliminary audit

    ; Description of facility or building audited numbers of floors, GFA, air-con

    area, type of usage, occupancy, hours of operation, age of building, etc.

    ; Information on tenants in facility or building audited (If applicable) whether

    they are paying their own energy bills, how much floor area (sq meter) they

    occupy, etc.

    ; Past year’s energy consumption and cost

    ; Breakdown of energy (electricity and fuel) consumption

    5. Overview of Current Systems in Place

; Dates of preliminary audit

    ; Data collected from manufacturers’ design specifications

    ; Data collected from facility or building owner

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    6. Scope of Work for Detailed Energy Audit

; Phases of work intended

    ; Brief description of what will be done at each stage of the energy audit and

    what will be achieved

    ; Duration of each phase

    ; Personnel involved at each phase

    ; Proposed instrumentation plan in detail

    ; A layout of the proposed location of installation of instruments and sensors,

    preferably with pictures

    7. Recommendations and the Associated Costs and Savings

    ; Brief description of the present situation and shortcomings identified ; Initial findings, observations and assessment of the performance of systems

    or equipment

    ; Initial recommendations on energy saving measures with estimated energy

    and cost savings, investment cost and payback period for each measure. All

    numbers should be supported by information and assumptions made must be

    stated clearly

    8. Summary

    ; Summary of recommendations, estimated annual kWh and estimated cost

    savings, estimated investment cost and payback in table form

    9. Appendices

    ; Proposed Contract between the Company and ESCO (as mentioned in the

    application guidelines under documents required)

    - The following clause is to be included: All ESCO payments are contingent

    upon ESCO’s recommendations meeting the technical and financial criteria as

    declared by the Company in the EASe Application.

    ; Past year’s energy bills

    ; Layout plan of the facility or building

    10. General Notes to the Report

    ; Mathematical accuracy All calculations in the report should be checked for

    mathematical accuracy.

    ; Grammar and style The report should be written in proper prose. The

    language should be clear, concise and understandable.

    ; SI units must be used in all parts of the report.

    ; The report should be printed on both sides to save paper.

    2

    GUIDELINES FOR DETAILED ENERGY AUDIT REPORT

    1. Cover Page

; Report title

    ; Name of client (company for which facility or building has been audited) ; Location of facility or building

    ; Date of report

    ; ESCO

    ; ESCO KQP, audit team leaders, project officers and their project designations ; Signature of KQP

    ; Statement by the company accepting the report and verifying that the ESCO’s

    recommendations meet the company’s technical and financial criteria

    ; Signature of company’s representative

    2. Executive Summary

    All information in the Executive Summary should be drawn from the detailed information in the full report. The Executive Summary should contain a brief description of the audit, including:

    ; Name of client, location of facility or building audited ; Objectives of audit

    ; Key systems and equipment analysed

    ; Dates of audit

    ; Summary of recommended energy conservation measures, annual energy

    savings and cost savings using the table format below

     Recommended Estimated Estimated Estimated Payback

    No. Measure annual energy annual cost implementation period

    savings savings cost

    1

    2

    Total

    3. Table of Contents

    ; Introduction

    ; Methodology and instrumentation

    ; Data analysis and findings including graphs and plots

    ; Identified saving measures

    ; Summary of recommendations and the associated costs and savings

    ; Conclusion

    ; Appendices

    ; CD containing raw measurement data collected during the audit, in a readable

    file format

    3

    4. Introduction

    ; Objectives of audit e.g. to study the energy consumption of the facility or

    building or system with a view to identifying energy conservation measures for

    implementation that meet the client’s financial criteria and take into

    consideration facility/building technical and operational limitations ; The financial criteria and technical/operational limitations ; Brief description of facility or building audited number of floors, GFA, air-

    conditioned areas, type of usage, occupancy, hours of operation, year built,

    etc.

    ; Information on tenants in facility or building audited (If applicable) whether

    they are paying their own energy bills, what floor area (sq meter) they occupy,

    etc.

    ; Past year’s energy consumption and costs, including tariff rates used for

    financial calculations

    ; Breakdown of energy (electricity and fuel) consumption in pie-chart form:

    Percentage of Electricity Consumption

    Building Chiller

    PlantOthers36%31%

    Printworkshop

    Chiller

    6%Media Works

    Chiller Plant

    1%

    Lighting Air AHUsSystemsMV FansCompressors7%4%9%6%

    *In the above pie chart, if “Others” category accounts for more than 10% of

    the total consumption, provide a further breakdown and elaboration

    ; Scope of audit, elaborating what systems or equipment were studied

    5. Methodology and Instrumentation

; Instrumentation table (see example below)

    ; Detailed instrument installation and measurement procedure ; Pictures and maps showing the locations of the installed instruments and

    sensors

    ; Measurement error analysis (mandatory)

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    6. Data Analysis and Findings

; Date of audit

    ; Dates of data collection and logging

    ; Baseline energy consumption and the methodology used to establish it 2; The energy efficiency index (EEI kWh/m/year) of buildings, defined as the

    amount of energy consumed annually per Gross Floor Area (GFA) of the

    building. The EEI of offices, hotels and retail malls should take into

    consideration the set of normalization factors developed under the Energy

    Smart Buildings Labelling Scheme.

    ; Description of systems or equipment audited, their capacities and ratings,

    design and operating conditions, equipment schedules, etc, including

    information such as the type of systems, controls, type and number of

    auxiliary equipment, etc.

    ; Performance of systems or equipment audited e.g. COP or kW/ton ; Heat and mass balance where applicable

    ; Findings and observations

    Chiller plant

    a. Details of the equipment, their ages and the next replacement dates;

    description of controls, type and number of chillers, pumps, cooling towers

    and operating schedules.

    5

    Description Qty Rated kW or RT Operating Hours Year Installed

    Chillers (CH1-3)

    (Centrifugal, R134)

    Chilled water pumps

    (CHWP 1-3)

    Condenser water

    pumps (CWP 1-3)

    Cooling towers (CT1

     3)

    b. Details of the cooling load profile of facilities or buildings audited, illustrated with the following graphs:

    i. Plot of cooling load (kW) profile over at least one week

    ii. Super-imposed plot of daily cooling load (kW) profile; daily plots

    should be fine-lined and in different colours

    c. Chilled water plant system performance

; System performance measurement error shall not exceed ?5%.

    This implies the use of high accuracy thermometry and calorimetry.

    ; Detailed method statement explaining how the required degree of

    accuracy was achieved with the instruments and data acquisition

    hardware employed.

    ; Data required to establish system performance must be sampled

    and acquired simultaneously and continuously for a minimum of 1

    week at one-minute intervals.

    ; Required data points:

    i. Chilled water temperature, flow rate and pressure differential

    ; Each chiller

    o Supply and return temperature profiles as well as

    temperature differential profile (super-imposed)

    o Supply/return temperature histogram in percentage

    o Chilled water temperature differential histogram

    o Chilled water flow rate profile

    ; Main chilled water supply and return header

    o Supply and return temperature profiles (super-

    imposed)

    o Supply/return temperature histogram in percentage

    o Chilled water temperature differential histogram

    o Chilled water flow rate (supply header only)

    o Flow rate histogram in percentage

    o Pressure differential profile

    o Flow rate vs. pressure differential

    ; In systems with primary and secondary pumps, and bypass

    lines

    o Bypass flow (from temperature and flow measurement)

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    o Histogram of bypass flow as percentage of total flow

ii. Condenser water temperature, flow rate and pressure differential

    ; Each chiller

    o Supply and return temperature profiles as well as

    temperature differential profile (super-imposed)

    o Leaving water temperature histogram in percentage

    o Condenser water temperature differential histogram

    o Condenser water flow rate profile

    ; Each condenser water branch

    o Supply temperature profile of each branch using

    super-imposed plot

    o Supply temperature histogram in percentage

    o Return temperature profile of each branch using

    super-imposed plot

    o Return temperature histogram in percentage

iii. Chillers

    ; Histogram of individual chiller efficiency

    ; Average values in table format

     Parameter Design Chiller 1 Chiller 2 Chiller 3

    0Supply Temp (C)

    0Return Temp (C) Chilled Flow rate (l/s) Water

    0Supply Temp (C)

    0Return Temp (C)

    Condenser Flow rate (l/s) Water Capacity (kW)

    Power (kW)

    Efficiency (kW/kW)

    Operating Evaporator dP (Pa) Performance Condenser dP (Pa)

iv. Power Measurement

; kW profile for each chiller

v. Chilled water calorimetry

    ; Cooling kW profile of each chiller using super-imposed plot ; Cooling kW histogram in percentage

    7

vi. Chilled water pumps

    Parameter Flow Rate Pump Motor Efficiency

    (l/s) Head (m) Power (kW) (kW/kW) Design CHWP 1

     CHWP 2

     CHWP 3 Actual CHWP 1

     CHWP 2

     CHWP 3

For pumping systems with variable speed drives, provide

    ; Flow rate vs. kW

vii. Condenser water pumps

    Parameter Flow Rate Pump Motor Efficiency

    (l/s) Head (m) Power (kW) (kW/kW) Design CWP 1

     CWP 2

     CWP 3 Actual CWP 1

     CWP 2

     CWP 3

For pumping systems with variable speed drives, provide

    ; Flow rate vs. kW

viii. Cooling towers

    Parameter Condenser Water Condenser Water Flow Rate Power ooSupply (C) Return (C) (l/s) (kW) Design CT 1

     CT 2

     CT 3 Actual CT 1

     CT 2

     CT 3

; Ambient temperature and relative humidity profile taken over the

    measurement period

ix. Overall chiller plant

    (kWrefers to cooling load; kW refers to energy consumed) c e

    ; Daily chiller plant system efficiency profile vs. time (24 hours)

    ; Histogram of chiller plant system efficiency

    ; Plot of kW/kW vs. kW (chiller part load efficiency) cec

    ; Plot of kW vs. kW ec

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    ; Plot of (cooling load + all motor loads except fan motors) vs.

    heat rejection to verify the measured values

d. Air-handling units (AHUs)

    On-coil Off-coil Air Flow (CMH) AHU Motor (kW) AHU ooNo. Design Measured Rated Measured C RH (%) C RH (%)

Include, if available, air pressure drop across the coils in AHUs, floor area 22served (m), operating hours and index (kWh/m/year).

e. Mechanical ventilation systems

Details of the number, rating, operating hours, efficiency of fans

    Motor (kW) Air Flow (CMH) Description Floor area Operating and served Efficiency Hours 2Design Actual Rated Actual Location (m)

f. Basic indoor air quality

    Location Humidity Air Temp (ºC) CO Level (ppm) CO Level (ppm) 2

     Office

     Mail Room

     Food Store

     Carpark

g. Exhaust systems

Details of the type and purpose of exhaust systems; number of exhaust fans,

    performance of the exhaust fans

    Static pressure Fan: Location, Rated power Measured (Pa) (near suction Efficiency Purpose (kW) power (kW) manifold of fans)

    General exhaust 01

    General exhaust 02

    Acid exhaust 01

    Caustic exhaust 01

    9

h. Boiler systems

Details of the type, number, capacity and rating of boilers; number of

    feedwater pumps, condensate return pumps, deaerators, condensate return

    tanks and water softening plants

    Measured Parameter Design Boiler 1 Boiler 2 Boiler 3

    Steam capacity (kg/s)

    Water flow rate (kg/s)

    Operating pressure (Pa)

    Blower fan (kW)

     Boiler performance

    Parameter Boiler 1 Boiler 2 Boiler 3

    CO (%) 2

    CO (ppm)

    O (%) 2

    Excess air (%)

     Flue gas temperature (;C)

    Temperature difference between flue gas and air intake (;C)

    Estimated boiler efficiency (%)

    Feedwater pumps performance

    Feedwater Feedwater Feedwater Parameter Design pump 1 pump 2 pump 3

    Flow rate (kg/s)

    Head (m)

    Power (kW)

    Pump efficiency

    Overall boiler system performance

    Description of parameters Measurements

    Steam production (kg/s)

    Feedwater flow rate (kg/s)

    No. of feedwater pumps in operation

    Total feedwater pump (kW)

     Feedwater temperature (;C)

Include information the heat and mass balance of the boiler and steam-

    condensate systems including temperatures and pressures.

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