Energy Audit

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Sustainable use of energy-
A case study on Energy Audit for Centre for Environmental Studies, Anna University
(V. Vandhana Devi*)

Abstract
Climate Change & Global warming, ever increasing energy prices, acute energy shortage, forever widening and supply gap, hence energy efficiency and conservation measures have gained importance in the recent years. This paper involved an energy auditing with a view to enhance the existing energy efficiency level in the Centre for Environmental Studies, Anna University. Energy auditing is a systematic study of existing energy consumption pattern.

During the energy audit, a complete survey of power consumption in the Centre was carried out. Audit was conducted for lighting, fans, computers, Air conditioners and the laboratory equipment and their power consumption pattern was determined. The present energy consumption pattern of CES was identified and suitable energy conservation measures were suggested for minimising the power consumption in the centre.

By implementing all the measures suggested, it is possible to mitigate about 33, 573 kg of carbon di oxide emissions, annually in the region. Energy conserved is energy produced. This audit not only conserves energy but also produces energy.

*Assistant Professor (Sr.Gr), Department of Civil Engineering, B.S Abdur Rahman University, Chennai - 600048

Sustainable use of energy-
A case study on Energy Audit for Centre for Environmental Studies, Anna University
(V. Vandhana Devi, Assistant Professor, Dept. of Civil Engg. B.S. Abdur Rahman University)

1. Introduction
Energy is defined as the capacity to do work, motion, force, change in shape or form, to transfer heat. Energy audit is a technical analysis for identifying and quantifying energy utilization patterns. 2. Need for the present study

A survey of literature indicated that energy audit has been conducted for a variety of industries such as sugar, cement, leather, textile, iron and steel and refineries, etc. It has also been conducted for commercial establishments, hotels and software companies. However no attempt has been made to conduct energy audit for educational institutions. 3. Objectives of the study

4. Develop a suitable tool for energy audit for Centre for Environmental Studies 5. Review of energy related activities at CES
6. Measurement & Quantification of energy consumption by all utilities at CES 7. Identify areas of energy wastage at CES
8. Development of energy management proposals
9. Preparation of Standard operating practices for efficient use of energy at CES 10. Create energy conservation measures
11. Methodology
12. Data Collection
The number of lights, fans, computers and air conditioners, their type and their hours of usage were noted down. Using energy meter, the power consumed by the equipment such as Shaker, Muffle furnace, oven, BOD Aerator, refrigerator, incubator, COD Digester was determined for an hour. 13. Analysis of Data

The data collected were analysed to identify major energy consumers in CES. The energy consumption by all utilities at CES was measured and quantified. From the data, the monthly power consumption by CES was determined. 14. Energy Saving Calculation

The present status of the energy consumption and the ststus after the implementation of the proposal were compared to determine the energy savings. Their difference gives energy savings in kWh. For one kWh of energy saved, it is possible to reduce 1.04kg of carbon di-oxide emissions (Sethumadhavan, 2002). 15. Pay Back Period Calculation

Pay back period is defined as the length of time it will take an investment to return what put in. It is the period to recover the original or initial cost of the capital project out of the cash inflow generated from the capital project. It is also the pay-off or cash recovery. It...
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