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Commercial Building Energy Auditing Procedures

Module 1

Part A

This material is based upon work supported by the National Science award 2201631. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.

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Module 1 Learning Outcomes

  • Define the Levels of Effort for Commercial Building Energy Audits
  • Identify Data Collection and Information required for an audit
  • Calculating EUI and Creating an Energy Benchmark
  • Determining End Use Allocation

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Module 2 Learning Outcomes

  • Identifying Energy Efficiency Measures
  • Estimating Energy and Cost Savings
  • Simple Payback Calculations
  • Developing an Energy Audit Report

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Introduction

  • ASHRAE Procedures for Commercial Building Energy Audits (2nd Ed).

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Introduction

  • Commercial Building

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This Photo by Unknown Author is licensed under CC BY-SA-NC

This Photo by Unknown Author is licensed under CC BY-SA-NC

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Introduction

  • Energy Audit

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“Processes in which engineering service providers identify and recommend efficiency opportunities to Clients.

Objectives: Identify and develop measures that will reduce the energy use and/or cost of operating a building and/or will improve the indoor environmental quality experience by the occupants.”

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(Procedures text, page 17)

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Levels of Effort

  • Level 1 – Walk Through Survey

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  • Level 2 – Energy Survey

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  • Level 3 – Detailed Analysis

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  • Targeted Audits – Detailed but Limited Scope

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Preliminary Energy Use

  • Prior to conducting an audit
  • Historic utility use
  • Peak demand
  • Energy Cost Index (ECI)
  • Energy Utilization Index (EUI)

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Preliminary Energy Use

  • Utility Billing Data

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Preliminary Energy Use

  • Utility Billing Data

See page 27, Fig. 4

Example of Compiled Utility Data

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ASHRAE Procedures for Commercial Building Energy Audits

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Preliminary Energy Use

  • Utility Billing Data

See pages 29-30 for more information regarding Utility Charges

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ASHRAE Procedures for Commercial Building Energy Audits

Convert Energy Use into a Common Unit

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kWh – kBtu

Therms kBtu

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Conversion Factors

1 Therm = 100,000 Btu

1 kWh = 3412 Btu

1 kBtu = 1000 Btu

53880 kWh x 3412 Btu x 1 kBtu =

kWh 1000 Btu

183,839 kBtu Electrical Use (month)

4534 Therms x 100,000 Btu x 1 kBtu =

Therm 1000 Btu

453,400 kBtu Nat Gas Use (month)

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Preliminary Energy Use

ECI and EUI

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Why these are important

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ECI: Energy Cost Index Cost per sqft per year

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EUI: Energy Use per sqft per year

Benchmarking

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See pages 32-34 for more information on Benchmarking

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ASHRAE Procedures for Commercial Building Energy Audits

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Assignment 1

Instructions provided in lecture video.

Use Excel spreadsheet provided.

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This material is based upon work supported by the National Science award 2201631. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.

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Commercial Building Energy Auditing Procedures

Module 1

Part A

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END OF VIDEO

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