Energy Audit Handbook - Sustainable Energy Authority Of ...

1 1 Energy Audit HandbookIntroduction 41. Undertaking an Energy Audit 5 What is an Energy Audit ? 6 Why carry out an Energy Audit ? 6 How does an Energy Audit work? 62. Initial preparation 9 Arrange the introductory meeting 10 Agree the approach 10 Request specific information and data 10 Identify key personnel 113. Pre-analysis and planning 12 Undertake preliminary analysis 13 Review best available technologies/practices 13 Consider measurement planning and 13 portable measuring instruments Analyse current and past performance 15 Energy billing data analysis 15 Use of regression analysis 18 Use benchmarking 20 Develop an Audit checklist 21 Energy Venn diagram sample application 22 Sample Audit checklist for compressed air system 234.

2 Conducting the site visit 25 Devise site visit agenda 26 Consider health and safety 26 Carry out site visit 26 Assess Energy management 275. Technical assessment 29 Buildings 31 What to check 31 Typical opportunities 31 Potential pitfalls 31 Other resources

3 31 Lighting 32 What to check 32 Typical opportunities 32 Potential pitfalls 33 Other resources 33 Heating and boilers 34 What to check 34 Typical opportunities 34 Potential pitfalls 35 Other resources 35 Heating, ventilation and air conditioning (HVAC)

4 36 What to check 36 Typical opportunities 36 Potential pitfalls 36 Other resources 36 Pumps 37 What to check 37 Typical opportunities 37 Potential pitfalls 37 Other resources 37 Transport

5 38 What to check 38 Typical opportunities 38 Potential pitfalls 38 Other resources 38 Refrigeration and cooling 39 What to check 39 Typical opportunities 39 Potential pitfalls 40 Other resources 40 Industrial processes 41 What to check 41 Typical opportunities

6 41 Potential pitfalls 41 ContentsSEAI: Energy Audit Handbook2 BOOKMARK Other resources 41 Wastewater treatment plants 42 What to check 42 Typical opportunities 42 Potential pitfalls 42 Other resources

7 42 Compressed air 43 What to check 43 Typical opportunities 43 Potential pitfalls 43 Other resources 43 Renewable Energy 446.

8 Financial analysis of opportunities 45 Choice of financial analysis tool 46 Small investments 46 Larger investments 46 Additional considerations 46 Validated calculations 46 General approach 46 Accuracy considerations 46 Financial analysis methods 47 Simple payback 47 Net present value 47 Internal rate of return 48 Life cycle costing 497.

9 Identifying and prioritising 50 opportunities Identify opportunities for improvement 51 Generate register of opportunities 51 Recommended information 51 Methods to identify opportunities 53 Prioritise opportunities 53 Data retention 538. Reporting the results 54 Audit Report 55 Management presentation/closing meeting 56 Appendices 57 Appendix 1: Sample data request 58 Appendix 2: Best practice and technology resources 59 Appendix 3: Sample bills analysis tool 60 Appendix 4: Sample site visit agenda 61 Appendix 5: Sample financial analysis tool 62 Appendix 6.

10 Sample register of opportunities 63 Terms and definitions