Energy Audit Scope - Standard



Introduction: Background of the plant manufacturing activities and major energy consuming areas-Thermal and Electrical

Electricity consumption & Electricity Billing: Summary for the past year’s monthly electricity consumption and production data. Calculation of specific energy consumption, KWH/Rs. of material produced etc. and comments on the same.
Calculation of load factor and exploring reduction of maximum Demand. Comments on average power factor and methods to improve power factor. Exploring possibility of better use of time of demand tariff.

Scope of Thermal Energy Audit

     • To study Heat Balancing, estimate efficiencies of Heat exchangers
     • To study and identify Thermal losses, insulation up gradation
     • To study distribution network in plant-air/steam/gas
     • To explore heat recovery potentials
     • Any change in process, alternate fuel source etc.
     • Improvement in composition of fuel purchased

Performance Evaluation of Major Utilities and Process Equipment:

Electrical Distribution Networks:

Transformers: Performance evaluation through simultaneous measurements of major electrical parameters on HT side and rationalization of transformers, if needed.

Power Factor: Measurements of distortion & displacement power factor at various points viz., PCC, MCC, load centers etc., and analysis of the same for optimizing the network losses.

Metering & Monitoring Status: Review of existing meters for adequate monitoring requirements.

Electrical Equipment:

Electrical measurements of all major electrical parameters viz., voltage, current, power factor, KW, frequency etc., of important equipment (motors, lighting, etc.), with significant energy consumption. Loads susceptible to generation of harmonics shall be checked for present harmonic level. System unbalance with respect to voltage and current shall be checked. Cabling shall be checked for any avoidable losses.

Pumps & Fans/Blowers:

Measurement of Head/pressure, flow, power and determination of pump/blower efficiencies based on measured parameters and critical study of piping/ducting/valves/dampers pressure losses, system layout etc.


Determination of compressor capacities, specific power consumption, KW/CFM, leakage detection and quantification, pressure losses in auxiliary equipment/ piping, identify point using unnecessary high pressure and identify application with wasteful use.

Process Equipments [CNC Machines etc]:

Determination of specific power consumption for every major process step through measurements. Review of data with process personnel.

Diesel Generators:

Review of performance including major auxiliaries and suggestions for optimization.


Measurements of light intensity and all major electrical parameters viz., voltage, current, PF, KW. Study of type of lamps and chokes used; day and night time lighting etc.