Energy Auditing – Energy Conservation and Efficiency Measures PRESENTER Mr. A. Hamukale BENG, Meng,MBA,PEEIZ,REng

CONTENTS 1. Energy conservation 2. Definition of Energy Auditing 3. Objectives of Energy Auditing 4. Types of Energy Audits i) Preliminary audit (walk through audit) ii) Detailed Audit(Diagnostic audit) 4. Case study of How energy is conserved 5. END

ENERGY CONSERVATION AND EFFICIENCY MEASURES Energy conservation is one of the options users can implement to improve their energy efficiency. It aims to reduce the total energy consumption by eliminating waste. Other aspects of energy conservation include Attempts to optimise energy supply and use Aims to reduce energy input per unit of output, while holding constant total cost of providing an output

ENERGY CONSERVATION MEASURES Efficient production planning Introduction of efficient energy policy Energy auditing and conducting corrective measures

DEFINITION OF ENERGY AUDITING There are several relatively similar definitions of an energy audit  The verification, monitoring and analysis of the use of energy and submission of technical report containing recommendations for improving energy efficiency with cost- benefit analysis and an action plan to reduce energy consumption.  A systematic, documented verification process of objectively obtaining and evaluating energy audit evidence, in conformance with energy audit criteria and followed by communication of results to the client Ref

OBJECTIVES OF ENERGY AUDITING The objectives of an energy audit can vary from one plant to another. However, an energy audit is usually conducted to understand how energy is used within the plant and to find opportunities for improvement and energy savings Sometimes, energy audits are conducted to evaluate the effectiveness of an energy efficiency project or program.

TYPES OF ENERGY AUDITS The type of industrial energy audit conducted depends on the function, size and type of the industry, the depth to which the audit is needed, and the potential and magnitude of energy savings and cost reduction desired. Based on these criteria, and industrial energy audit can be 1. Preliminary energy audit (Walk through audit) 2. Detailed audit (Diagnostic audit)

PRELIMINARY AUDIT(WALK THROUGH AUDIT) In preliminary energy audit, readily available data are mostly used for a simple analysis of energy use and performance of the plant This type of audit does not require a lot of measurement and data collection. These audits take a relatively short time and the results are more general, providing common opportunities for energy efficiency. The economic analysis is typically limited to calculation of the simple pay back period, or the time required paying back the initial capital invested though realized energy savings.

DETAILED AUDIT(DIAGNOSTIC AUDIT) For detailed (or diagnostic ) energy audits, more detailed data and information are required Measurements and data inventory are usually conducted and different energy systems(pump, fan, compressed air, steam, process heating, etc) are assessed in detail, hence the time required for this type of audit is longer than that of preliminary audits. The results of these audits are more comprehensive and useful since they give a more accurate picture of the energy performance of the plant and more specific recommendation for improvements. The economic analysis conducted for the efficiency measures recommended typically go beyond the simple payback period.

ENERGY AUDIT PROCEDURES There are three main steps each of which has several steps. The three main steps are -Energy audit preparation -Execution and -Reporting

ENERGY AUDIT PREPARATION Selecting audit criteria Selecting audit team Preparation of audit scope Preparation of audit plan Check list preparation Data inventory preparation and measurements Collecting of energy bills and available data Preliminary analysis Initial walk

ENERGY AUDIT EXECUTION Analyzing energy use patterns Benchmarking and comparative analysis Identifying energy efficiency potential Cost analysis Benefit analysis

ENERGY AUDIT REPORTING Writing audit reports with recommendations Preparing action plan for recommendation Implementing the action plan

CASE STUDY OF ENERGY AUDIT Choose a plant to conduct an audit. Using the three steps of an audit, write down how you would do an audit. Present the findings and action plan

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