energy audit in industrial engineering

1. ENERGY AUDIT
(LD-3) A-BATCH
GUIDED BY - Mohsin Dadi Sir
PREPARED BY
Immanuel Alexander(9203)

2. AUDIT
 "the verification, monitoring and analysis of use of
energy including submission of technical report
containing recommendations for improving energy
efficiency with cost benefit analysis and an action
plan to reduce energy consumption"

3. TYPE OF AUDIT
 The type of Energy Audit to be performed depends
on:
 - Function and type of industry
 - Depth to which final audit is needed, and
 - Potential and magnitude of cost reduction desired
 Thus Energy Audit can be classified into the
following two types.
 i) Preliminary Audit ii) Detailed Audit

4. NEED FOR AUDIT
 to minimize costs for energy
 to minimize operational costs
 to minimize costs for repairs and reconstruction
 increase quality of environment that contributes to
increased work productivity

5. PRELIMINARY AUDIT
 Preliminary energy audit is relatively quick exercise
to:-
1. Establish energy consumption in organization
2. Estimate scope of saving
3. Identify the easiest areas of attention
4. Identify immediate improvement/savings
5. Set a reference point
6. Identify areas for more detailed study
7. It uses existing or easily obtained data

6. DETAILED ENERGY AUDIT
 Detailed energy audit evaluates all systems and equipments
which consume energy and the audit comprises a detailed
study on energy savings and costs.

7. DETAILED AUDIT IS CARRIED OUT IN 3 PHASE
1. Pre audit phase
2. The audit phase
3. The post audit phase

8. PRE AUDIT PHASE
 Step1-plan and organize
1. Walk through audit
2. informal interview with energy manager
 Step2-conduct brief meeting
1. Building cooperation
2. Issue questionnaire

9. AUDIT PHASE
 Step1-primary data gathering ,pfc,energy utility
diagram
1. Historic data
2. Process flow charts
3. Design operating data schedule
4. Annual energy bill
 Step2-conduct survey monitoring
1. Motor ,lighting ,insulation survey with portable
instruments
 Step3-conduct detailed trials
1. 24 hr power monitoring

10.  Step4-analysis of energy use
 Step5-identification and development of energy
conservation opportunities
 Step6-cost benefit analysis
 Step7-reporting and presentation

11. POST AUDIT PHASE
 Step1-implementation and follow-up
1. Assist and implement energy conservation
recommendation measures and monitor the
performance

12. BENCHMARKING
 It can be a useful tool for understanding energy
consumption patterns in the industrial sector and
also to take requisite measures for improving
energy efficiency.
 Factors involved
1. Scale of operation
2. Vintage of technology
3. Raw material specification and quality
4. Product specification and quality

13. BENCHMARKING FOR ENERGY PERFORMANCE
 Internal benchmarking
 Historical and trend analysis
 External benchmarking
 Across familiar industries

14. BENCHMARKING ENERGY PERFORMANCE
 Quantification of fixed and variable energy
consumption trends
 Comparison of industry energy performance w.r.t
various production levels
 identification of best practices
 Scope and margin available for energy
consumption and cost reduction
 Basis for monitoring and target setting exercises