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Computational fluid dynamics modelling of ventilation in road tunnels: enhancing air quality and safety

Ventilation units within vehicle tunnels play a pivotal role in ensuring safety and optimal air quality for
occupants. These units are used to assist with propelling air from one end to the opposite end of the tunnel.
Computational fluid dynamics (CFD) has emerged as an invaluable design tool for engineers and stakeholders,
offering simulated insights and data to optimise safety and efficiency in tunnel projects. This paper
emphasises the advantages of CFD for road tunnel ventilation design, showcases a case study involving
impulse fans, and highlights the positive effects on project costs and overall tunnel ventilation performance.

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Development of a whole-house energy rating tool for new housing

In 2019, Australian energy ministers agreed on the need for the Trajectory for Low Energy Buildings (the Trajectory). One of the key aspects in the Trajectory for residential buildings is to expand the Nationwide House Energy Rating Scheme (NatHERS) to offer nationally accredited whole-of-home (WoH) tools to enable compliance requirements in the National Construction Code (NCC).

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Streamlining electrification in support of decarbonisation

Our industry has increasingly focused on the electrification of building utilities coupled with low-carbon electricity to support the global decarbonization effort. Examples include the University of California’s system-wide ban on the use of on-site fossil fuel combustion in new construction and major renovations, and the City of Seattle’s recently passed measure to prohibit the use of natural gas for space heating in new construction and major replacements of heating systems in commercial buildings, as well as for water heating in new hotels and
large apartment buildings. This column presents an approach to integrating the production of domestic hot water with an electric heat-recovery chiller plant as a streamlined solution.

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What lies beneath

What lies beneath

Geothermal cooling is relatively underdeveloped in Australia, but as Ecolibrium staff writer Nick Johns-Wickberg discovers, its potential is huge.

Esteemed air

Esteemed air

AIRAH’s APER has been approved to register engineers in the ACT.

An eye for innovation

An eye for innovation

As CEO and co-founder of Conry Tech, Sam Ringwaldt, M.AIRAH, is rethinking our approach to HVAC&R.

Meet the experts

Meet the experts

Mitsubishi Heavy Industries Air-Conditioners Australia, (MHIAA), is celebrating its 25th anniversary in 2024, with some special celebrations planned for ARBS.

The fans of Sydney

The fans of Sydney

Ecolibrium staff writer Nick Johns-Wickberg explores how a mobile cooling hub in the Harbour City prevented three medical emergencies this summer past.

Cool comfort

Cool comfort

Federico Tartarini is Senior Research Associate at the Heat & Health Research Incubator, Faculty of Medicine and Health, at the University of Sydney. And soon he’ll be starting a new position as a Sydney Horizon Fellow, Senior Lecturer at the School of Architecture, Design, and Planning, also at Unisyd.

ARBS

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