All energy consuming equipment and systems were designed to meet a specific need or set of needs. This may be as simple as providing illumination in the case of a lighting system, or far more complex as in the case of the building HVAC system. Finding energy savings opportunities involves reducing the level of energy use while still meeting the original need or requirement.
EMOs represents how energy can be used wisely to save money and to limit environmental impacts.
An Energy Audit is a study of how energy is used in a facility and an analysis of what alternatives could be used to reduce energy costs.
This process starts by collecting information on the facility’s operation and about its past record of utility bills. This data is then analyzed to get a picture of how the facility uses ( and possibly wastes) energy, and identify EMO’s.
Major Systems To Consider: Building Envelope, HVAC System, Electrical Supply System, Lighting, Boilers and Steam System, Hot Water System, Compressed Air System, Electric Motors, and Special Purpose Equipment.
Energy Audit Levels
There is no universally accepted standard that sets out the scope for conducting an energy audit, there are three basic types, or levels of an energy audit, namely:
Walk-Through Audit
Comprehensive Audit
Investment Grade Energy Audit
Primarily the major difference between each type is the quantity of data collected and measured. In turn, this impacts the time required to conduct the audit, the time is taken to analyze the data, and hence the cost.
Each type or level is increasingly sophisticated, starting from the simplest walk-through audit up to the investment grade audit.
The resulting output or deliverable from every energy audit investigation is the energy audit report.
This report needs to be a meaningful document comprising the following basic elements:
1-Information about the energy systems and condition
2-Fuel usage
3-Energy usage summary, with charts
4-EMO's (Opportunities to save money)
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