Energy Audit of Government Buildings

In its vision to improve energy efficiency, the Ministry of Energy and Public Utilities decided that energy audits shall become a mandatory exercise for government-owned buildings. As a response to these policies, Pro-Design Engineering Consultants Ltd was appointed by the Prime Minister’s Office (PMO) to carry out an energy audit of three governmental buildings, namely, the Old Government House, the New Government House, and the New Treasury Building, located in Port-Louis. The purpose of these energy audits was to identify opportunities to improve the overall energy consumption and propose energy conservation measures. The energy audit was carried out to a level of detail of Level 2, in accordance with the latest version of ISO 50002:2014 for all objects of the building.      The project was led by our in-house Registered Energy Auditor.

The energy audit exercise included the following:

• Understanding the strategic role of energy in the buildings and the specific objectives of the building users for implementing energy efficiency projects
• Development of a relevant scope for the energy audit
• Planning of energy audit activities, time frames and required resources
• Survey and analysis of energy flows, for energy conservation in the buildings
• Carrying out data-collection activities and analyses
• Examination of the technical installations – lighting, appliances/equipment, networks/distribution systems
• Assessment of current energy usage of the building by the various plant, equipment, and installation (e.g., lighting, HVAC, computers, office equipment, etc)

Our survey consisted of detailed data collection including daily load profiles, energy consuming systems, O&M documentation, previous studies and future plans. Our electrical engineers and energy specialists carried out extensive analysis such as detailed energy balance and modelling, evaluation of the design and configuration options to address system needs. As a result of this comprehensive survey, our energy specialists were able to:

• Identify and evaluate potential energy saving/efficiency opportunities in the buildings
• Prioritise and recommend measures based on costs and return on investment
• Perform a cost estimates and cost analysis of the implementation of the proposed measures

In addition to quantifying energy savings, the Energy Audit also addressed the management aspect of energy use. Measures regarding energy monitoring and energy management were proposed for improved energy performance of the three important government-owned buildings. We have recently been appointed for the energy audit of the Police Communication Branch of Line Barracks.