Energy Efficiency

What is Energy Efficiency

Energy efficiency is sometimes referred to as the first energy resource and to be considered before burning any fossil fuels or using renewable energy resources such as hydro, biomass and solar energy. This is because any unit of energy that is not consumed does not need to be produced. However, the use of the term energy efficiency in contrast to energy savings or energy conservation, is carefully chosen, as energy efficiency imply that the comfort and service provided by the energy consuming process is not being compromised. Thus, energy efficiency is about maintaining or improving the comfort or services by using less energy input.

  • Reduce: Switch off equipment when not in use or better insulation of buildings so heat gain is reduced and thus cooling will be less.

  • Adjust: Adjust temperatures or lighting levels to fit the required comfort level, so energy is not wasted for unnecessary services. It can also include adjusting the consumption of energy from peak load to low load periods where the electricity tariff is lower to save energy cost.

  • Retrofit: Retrofit or replace inefficient or old equipment with better performing ones, or improve the performance of existing equipment by installing control devices such as variable speed drives on motors and pumps. Insulate the building against heat gains or enable natural ventilation, which will reduce the cooling load of the building.

  • Replace: Replace a total system with another type of system or energy source. This can be replacing fuel-fired boilers with solar hot water system or electrical heat pumps. This can also include the installation of renewable energy such as Photovoltaic system, where a portion of the electricity supply from the grid is replaced by own power generation.

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Chiller Plant Retrofit & Optimization

Particularly beneficial to plants older than 10 years, Xenergi Chiller Plant Retrofit Services

can reduce yearly operating costs up to 20 per cent and takes into account variables

such as weather data, chiller specifications andperformance characteristics to

evaluate potential energy savings and carbon reductions, as well as the impact and

payback of specific retrofit improvements. This analysis leaves the customer with

actionable measures that will significantly improve energy efficiency, reliability and



Lighting Retrofit & Control System

Xenergi's Lighting retrofit is the practice of replacing components in the system

with counterparts that make it use energy more efficiently. A lighting upgrade is any

strategy that reduces the system's energy use. Energy savings are realized over time

that can be significant enough to not only pay for the new equipment, but produce a

return on the investment.


Energy Performance Contracting (EPC) for EE

Energy Performance Contracting (EPC) is a form of ‘creative financing’ for capital improvement which allows funding energy upgrades from cost reductions. Under an EPC arrangement, Xenergi implements a project to deliver energy efficiency, or a renewable energy project, and uses the stream of income from the cost savings, or the renewable energy produced, to repay the costs of the project, including the costs of the investment.


Building Management System (BMS)

A building management system (BMS) is a computer based control system installed

in buildings that controls and monitors the building's mechanical and electrical

equipment such as ventilation, lighting, power systems, fire systems, and security systems

and significantly improves energy efficiency