The 6-Step Energy Audit

The Energy Audit should be carried out by a competent personhaving adequate technical knowledge on Building Services (BS)installations, particularly Heating, Ventilation and Air-Conditioning(HVAC) Installation, Lighting Installation and any other building services installations.

This competent person is referred to as the “auditor”and a team of auditors forms the “audit team”. The number ofauditors and time required for an audit depends on the audit scopeand objectives. During the audit process, the auditor needsassistance and cooperation from the auditees, such as end-users, operation and maintenance (O&M) personnel, etc.

To gain a better knowledge of the building and its energyconsuming equipment/systems, the audit team must collectinformation on the building operation characteristics and thetechnical characteristics of its various energy consumingequipment/systems. Its performances have to be identified throughchecking O&M records, conducting site surveys and reading metering records. The audit team will then identify areas that canbe improved and write up an energy audit report on the findingsfor record purposes and for subsequent EMO implementation andfollow-up actions. The flow chart on conducting energy audit isshown in Figure 1 for reference.

1. Defining Scope of Energy Audit

The scopes of works and the available resources for conductingthe energy audit should be determined. The available resourcesmean staff, time and budget. Recognising the extent of support from the building management, the audit team should then de-termine the scope of the energy audit such as the areas to beaudited, the level of sophistication of the audit, the savings anticipated, any EMOs to be implemented, the audit result to beused as reference for improvement on O&M, the need for anyfollow up training or promotion of results achievable, etc. Theplan for conducting the energy audit should then proceed.

2. Forming an Energy Audit Team

An audit team should be formed by:-

a) Determining the members of the audit team and their duties.
b) Involving the O&M personnel to provide input.
c) Facilitating meetings for sharing of information and familiarisingamong different parties.

Should in-house expertise or resources be regarded as notadequate, energy audit consultants should be employed. Many ofthe local BS consultants and tertiary academic institutions havethe expertise on energy audit.

Source: Electrical & Mechanical Services Department – The Government of the Hong Kong Special Administrative Region

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