Introduction to Energy Audit
Energy Audit is the key to a systematic approach for decision-making in the area of energy management. It attempts to balance the total energy inputs with its use, and serves to identify all the energy streams in a facility. It quantifies energy usage according to its discrete functions. Industrial and commercial building energy audit is an effective tool in defining and pursuing comprehensive energy management program.
The Need of an Energy Audit
In building industry, one of the top three operating expenses is often found to be energy (both electrical and thermal), If one were to relate to the manageability of the cost or potential cost savings in this components, energy would invariably emerge as a top ranker, and thus energy management function constitutes a strategic area for cost reduction. Energy Audit will help to understand more about the ways energy and fuel are used in any industry, and help in identifying the areas where waste can occur and where scope for improvement exists. The Energy Audit would give a positive orientation to the energy cost reduction, preventive maintenance and quality control program which are vital for production and utility activities. Such an audit program will help to keep focus on variations which occur in the energy costs, availability and reliability of supply of energy, decide on appropriate energy mix, identify energy conservation technologies, retrofit for energy conservation equipment etc. In general, Energy Audit is the translation of conservation ideas into realities, by lending technically feasible solutions with economic and other organizational considerations within a specified time frame. Energy Audit provides a “Bench-mark" (Reference point) for managing energy in the organization and also provides the basis for planning a more effective use of energy throughout the organization. Preliminary energy audit is a relatively quick exercise to:
1. Establish energy consumption in the organization
2. Estimate the scope for saving.
3. Identify the most likely (and the easiest areas for attention)
4. Identify immediate (especially no-/low-cost) improvements/ savings
5. Set a 'reference point'
6. Rating as per ECBC India 2007( BEE Ministry of power)
7. Identify areas for more detailed study/measurement
8. Preliminary energy audit uses existing, or easily obtained data
The Required Data
To create a base line of a facility energy usage generally a small survey is needed this survey is done by us, certain format or check list are used for data collection. Broadly the data required are explained below
1. Energy consumption by type of energy, by department/ Sector wise, by major items of process equipment, by end-use
2. Material balance data (raw materials, intermediate and final products, recycled Materials, use of scrap or waste products, production of by-products for re-use in other industries, etc.) .(Not incase of offices)
3. Energy cost and tariff data.
4. Process and material flow diagrams.(Not incase of offices)
5. Generation and distribution of site services (e.g. compressed air, steam). (Not incase of offices)
6. Sources of energy supply (e.g. electricity from the grid or self-generation)
7. Potential for fuel substitution, process modifications, and the use of co-generation systems (combined heat and power generation). .(Not incase of offices)
8. Energy Management procedures and energy awareness training programs within the establishment. Existing baseline information and reports are useful to get consumption pattern, production cost and productivity levels in terms of product per raw material inputs. The audit team should collect the following baseline data:
The Survey Data Forms
The survey data for creating a baseline energy use and to provide Monitoring and targeting strategy the building following Schedules
1. Construction details
3. Room or Zone Loads
4. Plant Room Equipment.
5. Plant room Lay out (Not incase of Core and shell Office)
6. Plan and Elevation Details
These five head almost contains all the required data to carry out a calibrated energy model of the facility, which will then be utilized in creating a base line for operation and it will also set a target for energy consumption.