The 6-Step Energy Audit

3. Estimating Time Frame and Budget

Based on the available resources, the time frame and the budgetcan be fixed. The budget is mainly built-up on cost of auditor-hours from collection of information to completion of the auditreport. The audit team should check whether they have adequatetesting instruments as shown in Appendix A. In addition, thecost for employing BS consultants and/or tertiary academicinstitutions may be included, if so required.

4. Collecting Building Information

The audit team should then proceed to collect information on thebuilding. The information should include:-

a) General building characteristics such as floor areas, numbersof end-users, construction details, building orientation,building facade, etc.;
b) Technical characteristics of energy consuming equipment/systems, design conditions and parameters;
c) Building services design report with system schematic diagramsand layout drawings showing system characteristics;
d) Equipment/system operation records, including data logs ofmetered parameters on temperature, pressure, current,operational hours, etc.;
e) Record of EMOs already implemented or to be implemented;
f) Record of maximum demand readings;
g) O&M manuals and testing and commissioning (T&C) reports;and
h) Energy consumption bills in previous three years.

In general, it should be assumed that the building manager wouldhave information on general building characteristics and the O&Mpersonnel would keep the equipment/system technical andoperation records. Appendix B shows some samples of log sheets.The audit team should determine the appropriate parties to beapproached for information collection, the need to discuss withthese parties for familiarisation of the building, the equipment/systems to be investigated and data verification and the need todiscuss with selected end-users.

The audit team should consider issuing questionnaires to end-usersto collect information on thermal comfort, lighting comfort,operational hours of individual floors/offices, electrical equipmentand appliances, etc.

After having collected all or the majority of the above information,the audit team will have better understanding of the buildingcontext and its energy consuming equipment/systems. With thisinformation, the audit team can better plan subsequent auditactivities and detect any missing important datum and arrange toobtain them.

At this stage of the audit, the auditor should be able to tell thecharacteristics of the energy consuming equipment/systems such as:-

a) Type of chillers, their capacities and operational character-istics (refrigeration pressure/temperature, water flow rate/temperature/pressure, etc.);
b) Type of HVAC systems, their components (fans, pumps,pipework, ductwork, etc.) and operating characteristics (flowrate, temperature, pressure, etc.);
c) Occupancies or usage for various equipment/systems;
d) Control mechanisms for various equipment/systems(controller, actuator, sensor, control logic, etc.);
e) Type of luminaires, their characteristics and controlmechanisms;
f) Power distribution system characteristics;
g) Operational characteristics of lift and escalator installation(zoning, type of motor drive, control mechanism, etc.);
h) Operational characteristics of other energy consumingequipment/systems; and
i) Characteristics of the building.

Pages: 1 2 3 4 5 6

Comments are closed.