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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.
Semiconductor Heat Pumps – A New Approach to Zero Emissions Heating
By Amnon Holland, MIEAust, CPEng, NER, M.AIRAHAs a result of the increased contribution of renewable energy for electricity generation and rising gas prices, there has been a shift from natural gas to electric-based heating in recent times. Commonly used electric...
CFD Analysis of Fixture Output Impact on Upper Room Germicidal Ultraviolet Light System Performance
Kishor Khankari, PH.D., Fellow ASHRAE; William Bahnfleth, PH.D., P.E., Presidential Fellow ASHRAEUltraviolet germicidal irradiation (UVGI) using electromagnetic radiation in the UV‑C wavelength band of 200–280nm can prevent the reproduction of microorganisms. Several...
Striking a balance: planning and implementation considerations for natural gas removal in hospitals
By Simon Witts BSc, CEng, MAIRAH, MCIBSE, FIEAust, CPEng, NER, APEC, IntPE(Aus); James Moyes MEng CEng MCIBSE MIEAust CPEng NER APEC IntPE(Aus) PE(Vic); and Broden Kay BEng (Architectural Engineering), Hons ABSTRACT This paper examines the challenges associated with...
Artificial Intelligence (AI) applications in the building and property industry
Arsen Ilhan, Stud.AIRAHABSTRACT Artificial intelligence (AI) is an area of computer science that emphasises the creation of intelligent agents, which are systems that can learn and act autonomously. AI deals with the question of how to create computers that are...
Developing a framework for delivering quality towards a sustainable built form future
Peter Phillips, F.AIRAH Member ASHRAE (Ret), Fellow AIRAH (Ret)ABSTRACT Delivering successful, high-quality, sustainable, future-proofed, built-form projects requires planning and coordination of complementary factors. This includes broad-based statements and detailed...
Disaggregation of precipitation data applicable for climate‑aware planning
David Ferrari*, Masoume Mahmoodi**, Chithral Kodagoda*, Nihal Abdul Hameed*, Trevor Lee*, Graham Anderson* * Exemplary Energy** College of Engineering and Computer Science, Australian National University, CanberraABSTRACT High-temporal-resolution precipitation data of...
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).
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.
Feasibility study of wastewater energy transfer for an existing campus building cluster
The HVAC-related energy usage of a group of three existing buildings on a Canadian university campus (the “Cluster”) was simulated. Two scenarios were compared: (1) an ambient loop paired with conventional HVAC equipment (boiler plant and cooling tower), and (2) an ambient loop using wastewater energy transfer (“WET”). The study aimed to assess the feasibility of implementing WET as a heating and cooling method for cold-climate institutional buildings, as well as to measure the effects of WET implementation on energy usage, greenhouse gas emissions, and energy costs
Carbon coordination
The race is on to reduce embodied carbon in buildings and construction. But as more organisations take up the challenge, coordination is key.
The zero effect
In a net zero world, it doesn’t matter whether we divide emissions by headcount or square meterage. By any measure, the balance of emissions must be the same. Zero.
Natural selection
In California’s capital city, a 1940s building has been re-lifed, aiming to create strong ties between nature and the local community.
In the hot seat
City of Melbourne chief heat officer Krista Milne talks with Ecolibrium staff writer Nick Johns-Wickberg about managing extreme heat in urban settings.
The convention
Boasting 300 exhibitors and 9,000 visitors over three days in May, ARBS 2024 will be the gathering place for the Australian HVAC&R community.
Health Check
In order to raise the standard of operational hospital buildings, a holistic approach must be taken, writes Cundall’s Amin Azarmi. When standards change there are two typical ways to respond. First, scramble to do the minimum required to comply. Or second, take the...
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