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What is Energy Auditing?

As per the Energy Conservation Act, 2001, Energy Audit is defined as “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”. Implementation of recommended measures can help consumes to achieve significant reduction in their energy consumption levels
Energy audit involves a systematic study undertaken on major energy consuming sections and equipments including construction of heat and mass balance with a view to identify the flow of energy, utilization efficiency of energy in each of the steps and pin-point wasteful energy used. A well-conducted energy audit would reveal the areas of wastage of energy and it would be possible to suggest saving of energy.
The Energy Conservation Act requires the energy audit report to contain recommendations for improving energy efficiency with cost benefit analysis and an action plan to reduce energy consumption [Clause 14(i)]. The conduct of energy audit and implementation of its recommendations on cost-benefit basis through accredited energy auditors is expected to help the designated energy consumers to achieve significant reduction in their energy consumption levels.

TRole of Energy Auditor:

  • Carry out a detailed energy audit.
  • Quantify energy consumption and establish base line energy information.
  • Construct energy and material balance.
  • Perform efficiency evaluation of energy & utility systems.
  • Compare energy norms with existing energy consumption levels.
  • Identify and prioritization of energy saving measures.
  • Analysis of technical and financial feasibility of energy saving measures.
  • Recommend energy efficient technologies and alternate energy sources.
  • Report writing, presentation and follow up for implementation.
  • Preliminary energy audit is a relatively quick exercise to:

  • Establish energy consumption in the organization.
  • Estimate the scope for saving.
  • Identify the most likely (and the easiest areas for attention).
  • Identify immediate (especially no-/low-cost) improvements/ savings.
  • Set a ‘reference point’.
  • Identify areas for more detailed study/measurement.
  • Preliminary energy audit uses existing, or easily obtained data.
  • Where as, detailed energy audit?

  • Whereas, detailed energy audit.
  • Offers the most accurate estimate of energy savings and cost.
  • Considers the interactive effects of all projects, accounts for the energy use of all major equipment.
  • Includes detailed energy cost saving calculations and project cost.
  • Steps involved in ‘detailed energy audit’.

    (EA) Pre-audit phase:

  • Plan and organize.
  • Walk through audit.
  • Informal interview with plant personnel.
  • Audit phase:

  • Primary data collection.
  • Conduct survey and monitoring.
  • Conduct detailed trials and experiments.
  • Analysis of energy use.
  • Identification and development of energy conservation opportunities.
  • Cost benefit analysis.
  • Report preparation and presentation to the plant personnel and management.
  • Post audit phase:

  • Implementation and follow-ups