Energy Audit and Conservation Strategies in Public Sector Buildings: A Case Study Approach

Abstract

Energy auditing has been identified as one of the key measures for public sector infrastructures to cut down on their costs and energy usage. The infrastructures referred to include administrative offices, institutions, as well as establishments providing services, all of which use substantial amounts of energy. In this research, we present an energy audit study of a representative public sector infrastructure facility so as to identify the ways of improving energy usage and saving energy in such infrastructures. Energy consumption is categorised into lighting, ventilation, air conditioning, and office appliances. Thereafter, efforts are made to identify all possible energy savings in a systematic manner. It is shown that several measures may be implemented to achieve these objectives; these include zero, low cost, and medium cost measures. Results indicate that a decrease of about 20% in energy consumption per year may be achieved via proper energy management measures.

Introduction

The text highlights the importance of energy auditing in public sector buildings, where increasing infrastructure and service demands have led to higher electricity consumption, mainly for lighting, HVAC (heating, ventilation, and air conditioning), computers, and other equipment. Energy auditing is a systematic process used to monitor, analyze, and improve energy use, based on the principle that energy saved is equivalent to energy produced.

The study examines a public-sector facility with a 701.48 kW connected load and an annual electricity cost of approximately ?40.7 lakh. Air conditioning and electrical equipment account for the largest share of energy consumption. The audit methodology includes data collection, energy-use analysis, identification of inefficiencies, and recommendation of conservation measures.

Several energy-saving strategies were proposed, including:

• Replacing conventional lighting with LED lights.
• Maintaining HVAC temperatures between 23°C and 25°C.
• Using power-saving modes for computers and reducing idle equipment operation.
• Improving power factor through capacitor banks.
• Incorporating renewable energy sources such as solar power.

The results indicate that these measures could reduce energy consumption by about 20%, saving approximately 144,360 kWh annually and ?9.39 lakh per year. Many savings come from no-cost or low-cost actions, such as behavioral changes and better operational practices, which offer immediate or short payback periods.

The study also found that HVAC systems are the largest energy consumers, making them the primary target for optimization. Differences in energy use across building blocks suggest that location-specific energy management strategies are more effective than uniform policies.

Conclusion

This research study conducted an extensive energy audit for identifying key aspects of energy usage and ways of reducing wastage. As seen from the analysis of the distribution of loads, operational characteristics, and electricity, a notable quantity of the consumed energy was focused in some key systems including the air-conditioning system, lighting system, and auxiliary facilities. Thus, through a thorough evaluation of these components, the researchers were able to find the inefficiencies and suggest methods for optimizing energy consumption. From the above discussion, one can easily deduce that it is possible to achieve significant savings in terms of energy consumption and cost by means of planning, implementing, and monitoring energy conservation techniques. Indeed, a number of measures ranging from no to low and medium cost were found to produce tangible results without any need for changing the existing infrastructure and its components. The study further indicates that energy efficiency does not necessarily rely only on technological advancements but also on efficient energy management strategies and user consciousness. The incorporation of systematic energy auditing along with constant monitoring leads to improved decision-making processes and promotes sustainability within the construction of public buildings. From the perspective of the economic assessment, it is evident that most of the suggested interventions will have quick paybacks, thus being extremely viable and implementable. The future scope for research may encompass the implementation of intelligent energy management systems that utilize smart technologies like Internet of Things-based sensors, artificial intelligence-based optimization, and real-time control systems. This will increase energy efficiency through predictive analytics, automation of decisions, and adaptability in controlling building energy systems. Another avenue for exploration could include the utilization of renewable energy sources such as solar energy and hybrid energy systems to decrease reliance on traditional energy sources.

References

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Copyright

Copyright © 2026 S Karthikeyan. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.