Walk Through Energy Audit

Walk Through Energy Audit

• The walk-through energy audit is the first simple, rapid survey of the plant/ process. The audit team takes a round through the plant area with attention focussed on the energy inputs , spots of wastage and available energy conservation opportunities. Items for waste recycling opportunities are identified. The data regarding energy inputs/ outputs is collected for use during Intermediate Audit.
• The Audit team includes the Energy Management Consultant (and their staff). Manager (Operation and Maintenance). Plant Engineer, Energy Supervisor etc. Additional team members may be selected depending upon the nature of audit
• For example, Manager (Civil) may be a member for Energy Audit of a Buidling. The team walks through the plant and observes the process and note down the observations in the Check List Format.

Preliminary Data and Categories and Classification A, B, C :

• The computer based data base is created energy evaluation. Each main plant, auxiliary plant and other zone is identified by a certain number.
• The data regarding the plant, instruments, auxiliary and other zones (such as stores, canteen, office etc) is obtained from the Plant Engineering Documents.
• The energy inputs for each are identified. Preliminary assessment is made in form of A, B, C categories :

Category A : Major Energy Inputs/ Outputs

Category B : Medium Energy Inputs/ Outputs

Category C : Minor Energy Inputs/ Outputs

For example : For an arc furnace steel melting plant preliminary categories are :

Category A : Major Energy Inputs/ Outputs : 1. Electrode Consumption 2. Electrical Energy Consumption

Category B : Medium Energy Inputs/ Outputs :

Waste heat during idle period, Waste heat through cooling water, Selection of metal for charge (size and composition).

Category C : Minor Energy Inputs/ Outputs : Major and Medium Energy Input/ Output list is helpful in not missing the item during the Walk through audit

Case Study : Recommendations of Walk – Through Energy Audit.

Check list for walk-Through Energy Audit

Project No : EA001

EA No : 1-Preliminary

Title of Energy Audit : EA of Alloy Steel Plant

Team Members : Consultant, Plant Manager, O & M Supervisor

Date of Audit : 3-5-98

Remark : Present energy costs
are ₹ 2 lakh per months.

A. NUMBERING SYSTEM

1. Data regarding plan/ process and                 identification numbers 101 Main Plants     102 Auxiliary Plants	1011 440 kv substation 1012 Induction furnace No.1 1013 Machine shop 10001 Cooling tower 10112 Lighting system 10113 Transport system
2. Buildings	2001 Furnace plant 2002 Machine shop 2003 Stores
3. Other zones	3001 Canteen 3002 office 3003 ……………………………..

1. Input Energy to Each Main Plant (Yes or No) :

Category (as example)	Elect. A	Petrol Nil	Diesel Nil	Fuel A	Lub. B	Heat B	Coal C	Wood Nil
Main plant No.
1011 Substation	Y	N
1012 Furnace	Y	N	N	N	N	Y	N	N
1012 Machine	Y	N	N	Y	Y	Y	N	N
1013 ………….

2. Input Energy to Each Auxiliary (Yes or No) :

Category (as example)	Elect. A	Petrol Nil	Diesel A	Fuel B	Lub. B	Heat B	Coal C	Wood Nil
Auxiliary Plant No.
10111 CT	Y	N	N	N	N	Y	N	N
10112 Lighting	Y	N	N	N	N	N	N	N
10113 Transport	N	Y	Y	N	N	N	N	N
10113 ……………

Input Energy to Other Zones :

Category (as example)

Elect. B

Petrol C

Diesel B

Fuel B

Lub. B

Heat C

Coal C

Wood C

Zone No.

3001
………………………………

3002
………………………………