Energy Audit Report Format

Energy Audit Report Format

• After successfully carried out energy audit energy manager/energy auditor should report to the top management for effective communication and implementation.
• A typical energy audit reporting contents and format are given below. The format can be suitably modified for specific requirement applicable for a particular type of industry.
• The following format is applicable for most of the industries.

REPORT ON DETAILED ENERGY AUDIT TABLE OF CONTENTS

1. Acknowledgement. 
2. Executive Summary. 
3. Energy audit options at a glance and recommendations 

1.0 Introduction about the Plant 

  1.1 General plant details and descriptions

  1.2 Energy audit team 

  1.3 Component of production cost (Raw materials, energy, chemicals, manpower, overhead, others) 

  1.4 Major energy use and areas 

2.0 Production Process Description 

  2.1 Brief description of manufacturing process 

  2.2 Process flow diagram and major unit operations 

  2.3 Major raw material inputs, quantity and costs 

3.0 Energy and Utility System Description 

  3.1 List of utilities 

  3.2 Brief description of each utility 

  3.2.1 Electricity 

  3.2.2 Steam 

  3.2.3 Water 

  3.2.4 Compressed air 

  3.2.5 Chilled water 

  3.2.6 Cooling water

4.0 Detailed Process Flow Diagram and Energy and Material Balance 

  4.1 Flow chart showing flow rate, temperature, pressures of all input-output streams 

  4.2 Water balance for entire industry 

5.0 Energy Efficiency in Utility and Process Systems 

  5.1 Specific energy consumption 

  5.2 Boiler efficiency assessment 

  5.3 Thermic fluid heater performance assessment 

  5.4 Furnace efficiency analysis 

  5.5 Cooling water system performance assessment 

  5.6 DG set performance assessment 

  5.7 Refrigeration system performance 

  5.8 Compressed air system performance 

  5.9 Electric motor load analysis 

 5.10 Lighting system 

6.0 Energy Conservation Options and Recommendations 

  6.1 List of options in terms of Low Cost/No Cost Medium cost and High investment cost Annual Energy and cost savings, and payback 

  6.2 Implementation plan for energy saving measures/projects

 ANNEXURE 

  A1. List of Energy Audit Worksheets 

  A2. List of instruments 

  A3. List of Vendors and Other Technical 

The following Table A and Table B can be used as a guidance for energy audit assessment and reporting Table A : Summary of Energy Saving Recommendations

Sr. No.	Energy Savings Recommendations	Annual Energy (Fuel & Electricity) Savings (kWh/MT or MT)	Annual Savings (₹ Lakhs)	Capital Investment (₹ Lakhs)	Simple Payback period
1.
2.
3.
4.
Total

Table B : Types and Priority of Energy Saving Measures

	Type of Energy Saving Measures	Annual Electricity /Fuel savings	Annual Savings	Priority
		kWh/MT or kl/MT	(₹ Lakhs)
A	No Investment (Immediate) – Operational Improvement – Housekeeping
B	Low Investment (Short to medium Term) – Control – Equipment Modification – Process change
C	High Investment (Long term) – Energy efficient – Product modification -Technology change

 Table C : Reporting Format for Energy Conservation Recommendation

A :Title of Recommendation	Combo DG set Cooling tower with main cooling tower
B : Description of Existing System and its operation	Main cooling tower is operating with 30% of its capacity. The rated cooling water flow is 5000 m3/hr. Two cooling water pumps are in operation continuously with 50% of its rated capacity. A separate cooling tower is also operating for DG set operation continuously.
C : Description of Proposed system and its operation	The DG set cooling water flow is only 240 m3/h. By adding this flow into the main cooling tower, will eliminate the need for a separate cooling tower operation for DG set, besides improving the % loading of stop the DG set cooling tower operation.
D : Energy Savings Calculations
Capacity of main cooling tower	=	5000 m3 / hr
Temperature across  cooling tower (design)	=	8oC
Present capacity	=	3000 m3/hr
Temperature across cooling tower (operating)	=	4oC
% loading of main cooling tower	=	(3000 x 4)/(5000 x 8) = 30%
Capacity of DG set cooling tower	=	240 m3/hr
Temperature across the tower	=	5oC
Heat load (240 x 1000 x 1 x 5)	=	1200,000 kcal/hr
Power drawn by the DG set cooling Tower :	=
Number of pumps and its rating	=		2 x 7.5 kw
Number of fans and its rating	=		2 x 22 kw
Power consumption @ 80% load	=		(22 x 2 + 7.5 x 2) x 80 = 47 kw
Additional power required for main cooling tower for additional water flow of 240 m3/h(66.67 I/S) with 6 kg/cm2	=		(66.67 x 6) / (102 x 0.55) = 7kw
Net Energy savings	=		47 – 7 = 40kw
E : Cost Benefits
Annual Energy Saving Potential	=			40 kw x 8400 hr = 3,36,000 Units/year
Annual Cost Saving	=			3,36,000 x ₹ 4.00 = ₹ 1s per year3.4 Lakh
Investment (Only cost of piping)	=			₹ 1.5 Lakhs
Simple payback method	=			Less than 2 months