WR Ahern Award – AIRAH Awards 2022 finalists

Sponsored by Ecolibrium

This award goes to the best technical paper by an AIRAH member published in Ecolibrium over the previous year.

AIRAH Ecolibrium April 2021

"Propagation of droplets in an HVAC system"

by Simon Witts, M.AIRAH, and Sam Coleman

Ecolibrium – April 2021

This paper studies the propagation and distribution of water droplets typically generated by talking or more forcefully from a cough or a sneeze through a typical office and ventilation system.

AIRAH Ecolibrium May 2021

"Potential impact of evaporative cooling technologies on Australian office buildings"

Dr Paul Bannister, L.AIRAH; Hongsen Zhang, Affil.AIRAH; and Dr Stephen White, F.AIRAH

Ecolibrium – May 2021

This paper presents the results of a preliminary simulation-based study of the potential energy-efficiency benefits of a range of evaporative cooling technologies for Australian office buildings across the full range of Australian climates.

AIRAH Ecolibrium June/July 2021

"Carpark mechanical ventilation – time to take performance seriously?"

Dr Craig Pregnalato, M.AIRAH

Ecolibrium – June/July 2021

This paper considers how using performance solutions rather than NCC deemed-to-satisfy provisions for carparks can lead to more energy-efficiency and sustainable designs that better reflect modern vehicle emission rates. 

AIRAH Ecolibrium August/September 2021

AIRAH Awards 2022 winner
"Best-practice energy performance benchmarked for refrigerated warehouses"

Stefan Jensen, F.AIRAH

Ecolibrium – August/September 2021

Minimisation of direct and indirect emissions from all refrigeration and air conditioning plant is becoming increasingly important. The triggers for this are the Kigali Amendment to the Montreal Protocol that has scheduled hydrofluorocarbon (HFC) refrigerants for a global phase-down. The second global initiative is the Paris Climate Treaty targeting carbon neutrality by 2050.

The paper presents recorded specific energy consumption values for a range of refrigerated warehouses constructed in Australia from 1999 to 2019. These refrigerated warehouses vary widely in terms of volume, temperature mix, usage, refrigerant choice, and refrigeration plant concept. Specific energy consumption (SEC) is defined as the energy consumption per m³ refrigerated volume per year [kWh/m³*a].

The paper demonstrates that despite the significant spread in SEC-values for a number of refrigeration plant concepts, a clear and predictable pattern emerges for one type of refrigeration plant in particular.

The paper explains the factors that influence the spread in recorded energy performance values. It does so based on practical energy consumption records pertaining to the various plant types discussed in the paper and it shows what SEC-values are practically achievable.

Finally, the paper proposes a best-practice energy performance benchmark for refrigerated warehouses in Australia. This proposal is based on actual recorded values for more than 20 installations completed since 2013 in various Australian locations. The purpose of the best-practice proposal is to provide refrigerated warehouse operators with a benchmark to measure actual energy performances against and initiate improvement actions that address inefficiencies.

AIRAH Ecolibrium November 2021

"Next-generation fault-detection for commercial building HVAC systems"

Hao Huang and Craig Roussac, M.AIRAH

Ecolibrium – November 2021

AIRAH Ecolibrium Summer 2021

"Planning for carbon neutral in existing buildings"

Grace Foo, M.AIRAH

Ecolibrium – Summer 2021

This paper explores the role of optimisation of existing infrastructure, onsite renewable and non-renewable generation, hardware changes and energy-procurement activities in achieving carbon neutral status for a mixed-use building in Melbourne, with consideration to moving electricity and gas grid factors (cost and emissions) across 15 years.