Energy audit is a systematic approach to identify the energy consumption in a facility, through detailed procedure of measurement, monitoring & verification and identifying the energy conservation opportunities and pursue the energy management program to reduce the energy consumption and increase the energy savings, cost savings and profits.
Preliminary Energy Audit
Preliminary Energy Audit/Walk through audit is the basic energy audit procedure done to identify the existing energy consumption pattern, energy sources.The company’s auditor visits the facility, interacts with the technician and gather necessary information and data such as plant layout, equipments list, their connected load, operating hours, past energy bill data for minimum of 2 years. And further details regarding the products manufactured or the service offered, production schedule and productivity.
After analysis, the major findings of the PEA would be
- Existing consumption pattern
- Various sources of energy in the facility
- Identify the major consumption areas
- Identify the most likely consumption area to be focused
- Identify immediate energy saving opportunities
- Establish “benchmarking” from the past data
- Scope for Detailed Energy audit
The time frame for Preliminary Energy Audit is 1-3 days based on the size and capacity of the plant.
Detailed Energy Audit
DEA is the measurement, monitoring and analysis of the energy consumption in the facility/industry taking the measurements from the equipments available in the facility. The main advantage of DEA is it gives a clear and accurate picture of the energy use, energy costs and energy spread in the industry. The Energy conservation opportunities are proposed in three categories along with economic calculations like Retrofit/Replacement cost Payback period, Cost – Benefit analysis etc.
- No/Low cost saving opportunities
- Medium cost saving opportunities
- High cost saving opportunities
The various data collected for the Detailed energy audit are consumption per equipment, connected load and Demand load, Peak load, Power factor etc., using various instruments. The methodology for the Detailed Energy Audit will be
- Develop Energy policy for the given facility
- Set targets – From the benchmarking done from Preliminary Energy Audit
- Measure the exact energy consumption
- Monitor the data for credibility
- Analyze the results obtained
- Formulate a Energy Management Plan
- Identify Energy Conservation opportunities and Recommend Energy Conservation measures
- Implement the suggested solutions
- Check for the improvements
Based on the size and capacity of the plant/facility data collection in the field will be completed within the time duration of 15days – 1 month. The analysis work and report preparation will be done in a month’s duration. A draft comprehensive report will be submitted after a month. Upon discussion with the Technical head or Person in Charge for the proposed Findings and Recommendations the final report will be submitted within 2 months of the study.