posted by: heuchadmin ABB AUSTRALIA PTY LTD provided electrical infrastructure rooms for the new Longford Gas Conditioning Plant. The electrical rooms are of modular “off-site” construction and included separate rooms for switch gear and battery room. The electrical room is known as the Local Equipment Room or LER.
Heuch Pty Ltd provided the HVAC system for the LER. The HVAC system includes 2 x 100% redundant air conditioning/heating systems, forced air ventilation, gas detection, exhaust fans and air vents.
The LER was constructed by SRS Dandenong. The HVAC system constructed by Heuch was installed onsite at SRS and fully tested before being dismantled, re-installed and re-commissioned onsite at Longford.
The units are supplied as a balanced system and consists of all equipment, instrumentation and auxiliary components required for safe and functional operation.
The Heuch units utilise R-134a high temperature refrigerant and lubricating oils for clean and efficient operation.
The units are individually controlled and monitored by a Proprietary ABB PLC based temperature and safety control system.
· Building is transportable and has fixed height & width limitations,
· Electrical Cabinets are located with 450mm of the ceiling,
· Electrical Cabinet Door swing allowances restrict overall duct width & duct height to <450mm,
· Maximum air velocities and NC criteria,
· External Duct & Plant area dimensions are restricted,
· Designed for continuous service under reference: AULF-WP-ISAUT-010003,
· Maximum ambient Air temperature: 38°C
· Minimum ambient Air temperature: 1°C
· Design Mean ambient Air temperature 27°C.
· Maximum ambient Ground temperature: 22°C
· Minimum ambient Ground temperature: 12°C
· Maximum Relative humidity: 81%
· Minimum Relative humidity: 51%
· Atmosphere: Petrochemical
· Area Classification: Non-hazardous
· Altitude: Below 1000m above sea level
· Ventilation systems ensuring a positive internal pressure with respect to the outside.
· Appropriate dust filters to air ventilation supply air intakes.
The LER Project had very precise and detailed specifications and comprehensive test requirements that needed to be closely adhered to.
The Mechanical. Electrical and Software specifications were very concise regarding safe and reliable operation with multiple levels of redundancy.
This was complicated by the requirement to fully assemble and wire the chamber at the SRS Site and test its functionality, before complete dis-assembly and re-assembly, and comprehensive re-commissioning at site.
On this project we worked closely with the Consultants and End Users to ensure that any issues identified were efficiently solved to everyones satisfaction.
The Project achieved all required goals and objectives to a level that our expertise in solving any issues that surfaced led to a request to solve problems on another switch-room, supplied by a third party supplier. This was successfully accomplished to everyone’s satisfaction.
Lessons learnt from this project included the importance of understanding and adhering to supplied Specifications and Documentation, the importance of accurate and un-ambiguous communication with the customer and end users and the crucial importance of keeping test documentation accurate and up to date.
It is also critical that all staff and employees have a detailed understanding of the Process and what we are trying to achieve.
Without cooperation, common goals and an understanding of what is required, a complicated project such as this can easily end in Chaos.
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