Conference speakers

Iain
Iain Campbell – Keynote speaker
Andrew
Andrew Pansulla – Keynote speaker
Jan
Jan Gerritsen – Keynote speaker
Michael
Prof. Dr. Michael Kauffeld – Keynote speaker
MichaelB
Michael Bellstedt
David
David Evans
Sergiy
Sergiy Kolinchuk
David
David Peall, Stud.AIRAH
Firas
Firas Shawash, Affil.AIRAH
Xiaolin
Xiaolin (Shannon) Wang, Stud.AIRAH



Klas
Klas Berglof
Dario
Dario Ferlin, M.AIRAH
Gordon
Gordon Lacey, Affil.AIRAH
Dave
Dave Redden, F.AIRAH
Ian
Ian Suffield
Felix
Felix Weber
Peter
Peter Brodribb, M.AIRAH
Omid
Omid Hamlehdar
MichaelB
Mark Mitchell
Caroline
Caroline Rham, Affil.AIRAH
Brian
Brian Toulson, M.AIRAH
Chien
Chien-Yuh Yang
Bill
Bill Ellul
Stefan
Stefan Jensen, F.AIRAH
MichaelB
John Mott, F.AIRAH
MichaelR
Michael Riese, M.AIRAH
AdamW
Adam Wade
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Andrew

Keynote speaker

Iain Campbell

Rocky Mountain Institute (USA)
Overview of the Global Cooling Prize

Presentation:
The Global Cooling Prize (GCP) is a worldwide competition organised by the Rocky Mountain Institute (RMI); the Government of India’s Department of Science and Technology; and Mission Innovation. The initiative aims to rally a global coalition of leaders to solve the critical climate threat that comes from the growing demand for residential air conditioning.

Harnessing the power of innovation from entrants, the GCP is seeking cooling solutions that will enhance people's lives without contributing to runaway climate change. This ground-breaking competition is designed to incentivise the development of a residential cooling solution that will have at least five times lower climate impact than today's standard room air conditioner units. This technology could prevent up to 100 gigatonnes (GT) of CO2-equivalent emissions by the year 2050 and put the world on a pathway to mitigate up to 0.5°C of global warming by the year 2100. The aim is to do this while enhancing living standards for people in developing countries around the globe. 

Campbell will explain the structure of the GCP. He’ll provide an update of activity since its November 2018 launch and the timeline to initial awards. Campbell’s presentation will also serve as a primer for the participant workshop being held in conjunction with AIRAH on March 27 in Melbourne. More details on the workshop will available shortly. 

Profile:
Campbell is a senior fellow at the Rocky Mountain Institute (RMI), where he is dedicated to identifying and scaling sustainable cooling solutions globally. He was the former managing director of the buildings practice at RMI, leading its efforts to decarbonise the built environment.

Prior to joining RMI, Campbell held various positions with Johnson Controls where, most notably, he led the global energy and workplace solutions business units. Previously, Campbell also served as the president of York International, Americas, where he was responsible for the commercial and industrial HVAC&R businesses covering product development, engineering, manufacturing, sales and service within the Americas region.


Keynote speaker

Prof. Dr. Michael Kauffeld 

Karlsruhe University of Applied Sciences (Germany)
HFC phase-down – What next?


Profile:
Prof. Dr. Michael Kauffeld holds a Master’s degree and Doctorate in mechanical engineering from the University of Hannover and studied mechanical engineering at the Catholic University of America, Washington, D.C.

Since 1986, Prof. Kauffeld has worked with a variety of development projects within the field of refrigeration. First at the National Institute of Standards and Technology (NIST), USA, he investigated energy savings through the use of zeotropic refrigerant mixtures in air conditioners and heat pumps. At the University of Hannover, Germany, he continued to work with refrigerant mixtures and also studied the use of air as refrigerant. In 1994 he joined the Danish Technological Institute (DTI), where he worked as project manager. Most of his work at DTI has focused on natural working fluids such as air, water, ammonia, carbon dioxide, hydrocarbons and ice slurry. Since September 2002 he has been professor for refrigeration at the Karlsruhe University of Applied Sciences, where he continues his research with natural refrigerants, mini channel heat exchangers and ice slurry.

Prof. Kauffeld serves on the UNEP Refrigeration, Air Conditioning and Heat Pumps Technical Options Committee and served on the UNEP TEAP Task Force on Global Warming. He is past-president of the IIR Ice Slurry Working Group (now Phase Change Materials Working Group), was president of commission B2 of the International Institute of Refrigeration (IIR) and is vice president of the IIR working group for young talents “CaRe – Career in Refrigeration”. He has written more than 100 scientific publications and filed several patents.



Keynote speaker

Jan Gerritsen

GEA Refrigeration (Netherlands)
A review of CO2 in mid-sized refrigeration systems

Presentation:
Environmental concerns have led to an increased focus on natural refrigerants. The huge growth of transcritical CO2 systems, mainly in supermarket applications and to a lesser extent in industrial refrigeration, can be seen as an example of organisations looking at environmentally friendly solutions.

Gerritsen will share the results of a study on the application of CO2 in mid-sized refrigeration systems, traditionally the grey area in between commercial (HFC) and industrial (ammonia) refrigeration. He will present a transparent evaluation of yearly energy consumption of CO2 systems versus ammonia systems for different climates. In this comparison, he will also evaluate the possibilities for heat recovery, which appear to be quite different for CO2 compared to other refrigerants. He will also focus on safety aspects and total cost of ownership.

Profile:
Gerritsen is the innovation manager of refrigeration technologies at GEA Refrigeration. He graduated from the Delft University of Technology in the Netherlands, where he studied mechanical engineering and specialised in refrigeration technologies. He joined GEA in 1988 and participated in many new technical developments, such as ammonia DX and CO2 cascade systems.

From 2012 to 2015, Gerritsen worked as an R&D manager for one of the leading supermarket cooling companies in the Netherlands.  



Keynote speaker

Andrew Pansulla

Chemours (USA)
An update on the phase-down of HFC refrigerants and case studies from Europe and North America on the engineering considerations for using HFO refrigerants

Presentation:
Currently, HFC-404A and other HFC refrigerants are being phased down by a variety of refrigerant regulations. This keynote address will discuss the development of lower global warming potential (GWP) hydro fluoro olefin (HFO) blends. The basic properties of these HFO blends will be presented, along with performance testing data and practical engineering considerations for system conversions. This will encompass field studies from Europe and North America about nonflammable and mildly flammable HFO refrigerants. The presentation will also include an analysis of the total carbon emissions from direct and indirect sources.

Profile:
Pansulla is the global technical service engineer for Chemours Refrigerants. He holds a Master’s degree in chemical engineering from Lehigh University. Over the past five years with Chemours/DuPont, he has worked on several different projects around refrigerant development, including the physical testing of next-generation refrigerants in controlled environments, and assisting end-users in the field with HFO retrofits. The focus of his role within Chemours is to ensure that end-users all over the globe are properly educated on how to handle both existing and emerging refrigerants.  


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Klas

Michael Bellstedt

Minus40

Presentation
:
Common energy penalties suffered by small refrigeration systems

Small refrigeration systems have been shown to have a very high incidence of pervasive and prevalent faults, causing nearly 80 per cent of all small site-installed systems to operate under less than optimal conditions. In many cases, resolution of these faults, if accurately diagnosed, would yield a significant energy efficiency benefit and improve reliability outcomes to the owner. 

Bellstedt will outline the energy impacts and observed faults from the research analysis conducted on the studied sites. In some cases a 45 percent reduction of annual energy costs was achieved and on average a 23 per cent reduction was achieved with only basic action required.  
Considering the very large number of small refrigeration systems in use across Australia, the potential for saving energy and reducing CO2 emissions is significant.

Profile:
Bellstedt is a leading specialist refrigeration consultant. He studied mechanical and thermal engineering in South Africa and holds a PhD in thermal engineering from the University of Stellenbosch. Bellstedt is passionately interested in sustainability and is a regular volunteer with community organisations.
 

Klas Berglof

ClimaCheck (Sweden)

Presentation:
Optimisation with unbiased performance monitoring and benchmarking tools save 10–30 per cent of the energy in supermarket refrigeration and air conditioning

Optimisation of air conditioning and refrigeration systems is an environmental necessity and a business opportunity. Around 20 per cent of global electricity is used by air conditioning and refrigeration systems, so the focus on efficiency will increase beyond product ratings. To encourage actual efficiency in the field, measuring and validation of performance is necessary.

Berglof describes his experience of the internal method – a cost‐effective measuring procedure for field optimisation used in hundreds of thousands of measurements – and a benchmarking parameter System Efficiency Index (SEI) that eliminate the dependence of operating conditions on COP/EER and kW/RT.

Profile:

Berglof has a Master of Science in applied thermodynamics and refrigeration from the KTH Royal Institute of Technology in Stockholm. Since 1984, Berglof has been active in the refrigeration, air conditioning and heat pump industry. He is an experienced consultant in development projects and in Montreal Protocol projects to phase out ODS. Berglof founded ClimaCheck in 2004 to develop performance analysing for the RAC industry. 


Peter

Peter Brodribb, M.AIRAH

Expert Group
Best Practice Guide for Energy Efficient Walk-in Coldrooms

Presentation:
The existing walk-in coolroom and freezer supply chain is almost completely unregulated, with no to very little guidance for contractors and end-users regarding what constitutes minimum or good practice.

In 2018, an extensive, open-engagement research process with industry and key stakeholders was undertaken to understand the main issues and barriers to energy efficiency in this sector. Following this research, AIRAH and Expert Group were awarded a contract to develop an Industry Best Practice Guide for Energy Efficient Walk-in Coldrooms encompassing design, installation, commissioning and maintenance. The guide will include a star rating index intended to provide suppliers and end-users with a rating on the energy efficiency and environmental impact of the coldroom.

The presentation will cover key factors impacting efficiency in this sector. It will also provide outlines of the best practice guide, star rating index and industry consultation process.

Profile:
Brodribb is a highly experienced energy efficiency and climate change consultant, with over 20 years of global experience in energy technology, products and systems, as well as expertise in the HVAC and refrigerated cold chain industries. He is a specialist in the strategic and technical issues associated with direct and indirect emissions in the climate change, energy and HVAC&R industries.  

Brodribb is regularly engaged as an expert witness in disputes regarding delivery of complex mechanical services contracts. As a mechanical engineer, he has the technical intuition to rapidly attain the knowledge required to assess emerging low-emission technologies.
 
David

David Evans

The wholesale market: energy efficiency for refrigeration

Presentation:
Australian energy prices have increased significantly over the past decade and businesses are struggling to keep up. For companies relying on refrigeration for their operations, power supply is fundamental to their success, though it can be one of their largest business expenditures. Evans will discuss and show case studies on how businesses can optimise their energy use through wholesale energy procurement, and how a combination of corporate renewable power purchase agreements (PPAs) and demand response can help lower energy costs.

Profile:
Evans has trade qualifications in electrical engineering and more than 20 years’ experience in industrial automation, energy efficiency, power systems and business management. He has constantly helped businesses become more sustainable, improving their reliability and efficiency while reducing their costs. Evans is currently a director at Flow Power.  

Evans has previously operated his own environmental consulting business and was general manager of the Drives engineering and service division of ABB Australia.
 
Bill

Bill Ellul

Rotary Heat Exchangers
Indirect evaporative cooling

Presentation:
Indirect evaporative air cooling (IEC) utilises a sensible heat exchanger with an evaporative cooler in reverse mode, supplying cooled ambient fresh air into the building without significantly increasing its humidity. A mathematical computer model of an IEC is developed and used to analyse three airflow orientation options (termed 2, 3 and 4 portIEC). Ellul will discuss the behaviour, advantages and disadvantages of these, depicted as cycles on the psychrometric chart, and discuss the concept of the ideal dewpoint temperature cooler. The model results will be compared with test results from several prototypes.

Profile:
Ellul graduated from Monash University in mechanical engineering. He spent 13 years at the CSIRO, working in air conditioning research, and 10 years as a lecturer at Swinburne University. In 1989, Ellul formed energy audit consultants Ecopower before becoming the CEO of Rotary Heat Exchangers in 1990.


Dario

Dario Ferlin, M.AIRAH

Woolworths 
Case study on an HFC-free and gas-free refrigeration, space heating and space cooling warm climate supermarket

Presentation:
This presentation explores Woolworths’ pilot of an integrated refrigeration and HVAC transcritical CO2 system at Prestons in Western Sydney. The third iteration of Woolworths’ push to deliver a scalable HFC-free Australian supermarket, the project is currently being commissioned. Ferlin will discuss how his team have virtually eliminated synthetic refrigerants from the store by providing space cooling and space heating via an integrated transcritical CO2 refrigeration system. 

Profile:
Ferlin entered the refrigeration industry in 2001, collaborating on the first transcritical CO2 projects being piloted in Europe. He later relocated back to Australia, where he now works at Woolworths as the company’s innovations engineer.  
 
Omid

Omid Hamlehdar

Woolworths

Presentation:
Efficient contractual strategy for refrigeration installation work in the retail industry

Organisations like Woolworths strive to deliver new or refurbishment projects to meet their organisational plans. Conducting tender activities is a common practice, but running more than 100 tenders per year doesn’t seem to be an efficient solution for clients and installation contractors. 

Hamlehdar will explain how effective and appropriate contractual frameworks can improve project delivery efficiency without compromising cost effectiveness. 

One option that will be explored is an early engagement model with contractors to agree on rates. This will help organisations like Woolworths to ensure the right solution is delivered. It will also help contractors with better planning for their resources and can improve their profitability. 

Profile:
Hamlehdar has a Bachelor of Science in mechanical engineering and a Master of Science in energy systems design from the University of Manchester (UK) and K. N. Toosi University (Iran). He has obtained his MCIPS (Member of Chartered Institute of Purchasing and Supply) from the UK, originally working as a project engineer. For the past 15 years, he has been involved in the commercial industry.

Hamlehdar’s main area of expertise is energy, HVAC&R and engineering services. Currently he is employed as the refrigeration category manager for the Woolworths Group.
 
Stefan

Stefan Jensen, F.AIRAH

Scantec Refrigeration
Central NH3 refrigeration systems with dry expansion

Presentation:
Using 15 practical installations as examples, Jensen will detail how central, low-charge NH3 refrigeration plants operate; what minimum refrigeration capacities are practical and viable; how low the NH3 refrigerant inventories can be; what energy performances these systems are capable of delivering; what the long-term operating experiences are; which applications are suitable; and how these systems compare with other concepts based on natural refrigerants. 

Jensen will also summarise the operating principles of the LOGAS hot gas defrost concept. LOGAS defrost is capable of reducing the refrigerant inventories of central-type, low-charge NH3 plant by around one-third. It does this by eliminating both the condensate return during defrost and the liquid reservoir in the intercooler.

Profile:
Jensen is co-founder and managing director of Scantec Refrigeration Technologies. He has more than 30 years of experience in the industry and co-invented the Rotadisk flare ice-maker. He serves as a director on the AIRAH national board.
 
Sergiy

Sergiy Kolinchuk

Danfoss Australia
Boosting efficiency of CO2 transcritical systems with the latest ejector solutions

Presentation:
During the past 10 years, CO2 has become a viable refrigerant used in a variety of system configurations. The most-used set-up is a transcritical CO2 system. These have earnt popularity because of their relative simplicity and the possibility of using high-potential condensation heat – but they are known to be very sensitive to outdoor temperatures. Improvements by adding ejector technology have increased CO2 system efficiency, even in very warm climates.

Kolinchuk will present a case study, sharing the testing results from several CO2 transcritical system installations located in different climate zones. These results will benchmark HFC and CO2 systems without ejectors. Kolinchuk will discuss the level of savings and ROI span that ejectors bring to the owners.
 

Gordon

Gordon Lacey, Affil.AIRAH

DST Dryer
Design guide for desiccant systems integration into refrigeration for energy efficiency, ice and condensation prevention

Presentation:
An overview of the recent developments in desiccant technology and how these are now allowing for versatility to cover a range of cold chain design applications. Lacey will detail how a new technique – using waste heat from site condensers to regenerate desiccant cooling – can improve cold chain environments and save energy. The presentation will summarise desiccant designs across a variety of cold chain applications (including cold stores, loading docks, plate freezers, spiral freezers, supermarkets and ice rinks), highlighting their potential benefits. Lacey will also provide an introduction to relevant psychrometrics. 

Profile:
Lacey has over 32 years of desiccant system design and management experience in the HVAC&R industry, including exposure to best-design practices in USA, Europe, Asia and Australia. He has presented more than 12 papers on desiccant system design and has spoken of these techniques to HVAC&R bodies in Japan, India, Thailand and China.
 

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Mark Mitchell

SuperCool
The Australian food cold chain: current issues and practical solutions

Presentation:
Mitchell will detail some of the current challenges facing the food cold chain and provide insights into why and how they are occurring. He will also outline the requirements that need to be met in order to improve overall performance of the cold chain.

Profile:
Mitchell is the chairman of the SuperCool Group of Companies. In the days before factory air was fitted to most vehicles, he was also a former vehicle air conditioning installer and repairer. Now, he is a committed member of the HVAC&R industry.

Mitchell sits on the board of Refrigerant Reclaim Australia and he was the foundation president of VASA, an automotive membership organisation formed by mobile air conditioning specialists over 25 years ago. He played a key role in the early development of the current national refrigerant handling licensing and authorisation scheme (ARC). In 2017, helped form the Australian Food Cold Chain Council, and serves as its chair. 
 

John Mott, F.AIRAH

An application review of ammonia and CO2 in the refrigeration industry 

Presentation:
Mott will review the current applications of ammonia as a refrigerant and a fertiliser. He’ll also speak about the potential for ammonia as an energy vector and hydrogen carrier. There will be discussion and comparison of the safety, risk and regulatory programs required for each application involving ammonia’s engagement with the community. A comparative analysis of a transcritical CO2 refrigeration system and a CO2 cascade system, using manufacturers’ published performance data, will also be presented. 

Profile:
Mott’s career in the industrial refrigeration industry has spanned 45 years, during which time he has worked in Australia, Asia and the USA. For the last 20 years of his career, he held the position of general manager and CEO of Gordon Brothers. Since retiring in 2017, Mott has volunteered with several non-profit, ammonia-related, international industry bodies.
 

David Peall, Stud.AIRAH

Air Conditioning and Refrigeration Company

Presentation
:
HVAC&R skills shortage – looking at our industry from a different perspective 

Much has been said and made of the invisible nature of the HVAC&R industry and its impact on the current trades skills shortage. A host of reasons for the shortage have been put forward – from an ageing workforce to the trade’s low profile among school leavers, compared to traditional trades. But with growth of the industry forecast to increase – and a skills shortage continuing to be reported by many employers around the country – a “steady-as-she-goes” strategy is unlikely to sufficiently address the problems the industry faces.
Peall will look to engage with delegates to start to think outside the box on how we, as an industry, can attract, train and retain a more diverse range of people to join us in a sector that plays such a vital role in the world. Peall is going to encourage you to ask not what the HVAC&R industry can do for you, but what you can do for the industry.

Profile:
Peall has built an RAC career leading to exciting global adventures that were unimaginable as an apprentice. He’s planning to expand on his degree in creative writing to undertake PhD research into innovative, entrepreneurial approaches to vocational educational training. Inspired by James Harrison (Australia’s inventor of refrigeration), he is writing a series of books aimed at encouraging young women to join the trade, and, more importantly, to use that experience to rise to senior management and board positions dominated by men. Peall has been a senior educator since 2007, a member of AIRAH, and a Women of AIRAH affiliate.
 
Dave

Dave Redden, F.AIRAH 

Refrigeration Innovations
Independent retailers moving to natural refrigerants

Presentation:
The uptake of natural refrigerants in the smaller and independent grocery retailer market in Australia has been slow. This is mainly due to several factors such as costs, lack of skill and poor information and fact sharing. 

Redden will discuss how the independent grocer retail sector is meeting the challenge of moving into natural refrigerants while being extremely price conscious. He will focus on examples in the market and upcoming projects being undertaken to meet these expectations.

Profile:
Redden has worked in the refrigeration industry for more than 50 years. He has experience in service and installation, as well as engineering and R&D. He is principal at Refrigeration Innovations, which has been operating for over 18 years.


Caroline

Caroline Rham, Affil.AIRAH

shecco
Latest market trends for natural refrigerants in commercial and industrial refrigeration in Australia and key global markets

Presentation:
This presentation will focus on the uptake of CO2 and hydrocarbons in commercial refrigeration, as well as CO2 and low-charge ammonia in industrial refrigeration applications. Rham will provide the latest market data on the current state of these technologies in Australia and other key global markets. There will also be a look at the current uptake and future potential of the technology, taking into consideration the ongoing discussions on the revision of IEC 60335-2-89 for commercial refrigeration.

Profile:
For more than 15 years in France and across the Asia-Pacific region, Rham has worked for global leaders in safety, gas emission control, energy and refrigerants businesses. While working with a leading gas supplier in Australia, she launched R744 with a low moisture content. Rham is the business development manager with shecco in Australia and New Zealand.
 

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Michael Riese, M.AIRAH

Cold Logic
The influence on data variation versus sampling time in achieving accurate representation of refrigeration system performance

Presentation:
Refrigeration and HVAC systems in industrial and commercial environments are generally designed to meet extreme conditions based on available process and meteorological data. When applied to food and beverage production, industrial refrigeration is particularly responsible for a significant part of the overall power consumption of a manufacturer. Therefore, every effort is made to operate as efficiently as possible. One challenge to this process is the acquisition of relevant data in the shortest possible timeframe.

Riese will set out the experiences Cold Logic had in the acquisition analysis phase of data at a South Australian beer brewer. He will demonstrate a method for estimating the overall suitability of the sample size; the difference between overall sample COP, aggregated and averaged daily COP; outlier removal techniques; and the application of statistical process control techniques to objectively identify outliers.

Profile:
After completing his trade qualifications and engineering degree overseas, Riese moved to Australia to complete his PhD in experimental fluid dynamics. In 2013, Riese joined Cold Logic as the contracts division manager. Since 2017, he has been involved in the firm’s Defence division, and is also responsible for Cold Logic’s R&D effort. 
 

Firas

Firas Shawash, Affil.AIRAH

i-Fire Engineers
Fire engineering in refrigerated cold storage occupancies

Presentation:
Despite their low-temperature environment, cold storage occupancies are not immune from fires, and are required to comply with the fire safety requirements of the building codes. In fact, they represent a special hazard because their environment might affect the operation of the fire safety systems, fire brigade intervention and occupant evacuation.

Shawash will discuss the general fire safety issues that are encountered in these occupancies and how fire engineers can deal with them. He will also highlight that buildings, even when they have the same classification, are different, and should be assessed using a case-by-case approach.

Profile:
Shawash is a chartered professional engineer and a national registered engineer in the field of fire safety and mechanical engineering. He has extensive experience in providing cost-effective performance solutions under the Building Code of Australia for different classes of buildings with different issues. He is the senior fire safety engineer at i-Fire Engineers.
 

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Ian Suffield

Bitzer
A new concept to improve energy efficiency in transcritical CO2 systems 

Presentation:
Transcritical CO2 refrigeration systems continue to increase rapidly. However, the efficiency and performance of these systems is often inferior when compared to traditional refrigeration systems in warmer climates and tropical areas. Solutions to improve the efficiency of CO2 systems have been developed. Yet these typically result in higher levels of complexity, requiring additional energy-consuming equipment or consumption of significant amounts of water to boost performance. 

Suffield will discuss a solution that results in an efficiency or capacity increase of new or existing transcritical CO2 systems by up to 30 per cent at 38°C, while reducing system complexity and consuming zero energy.

Profile:
Suffield holds a degree in mechanical engineering and is currently the national engineering manager for Bitzer Australia. He is responsible for the development and delivery of refrigeration packages, from small commercially sized applications to large, industrial ones. Previously, Suffield worked as the refrigeration engineering manager for Woolworths, where he was responsible for the development of specifications, new showcase concepts and designs, and delivering significant energy reduction initiatives throughout the Woolworths network of supermarkets. 


Brian Toulson, M.AIRAH

City Holdings
NH3 to CO2 system conversion in a retail application  

Presentation:
Sometimes food retailers are asked to provide natural refrigeration solutions to meet specific requirements for their development brief. Applying natural refrigerants in a retail environment creates challenges pertaining to safety, performance, affordability and access to suitably experienced personnel to design and maintain the systems. Full natural refrigerants that are available and applicable to retail applications can be toxic, flammable or operate at high pressures. Their use in and around the public and the retail environment therefore carries with it some risk. They can pose safety management challenges, a high cost to implement, and the risk of high energy use and operating costs. This case study outlines a recent conversion from a NH3 cascade refrigeration system to a CO2 system in a retail application. 

Profile:
Toulson has been actively employed in the refrigeration sector since 1984. His work has largely been based in the retail sector, with contractors who design, install and service supermarket refrigeration systems. Toulson has transitioned from a trade-based background through to application engineering, with mentorship by chief engineers and a specialisation in supermarket refrigeration systems. Working on behalf of major national food retailers, he has been actively involved in CO2 sub-critical system designs since 2006 and trans-critical system designs since 2013.

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Xiaolin

Adam Wade

Lion Dairy and Drinks
A food producer’s perspective: challenges with the cold chain

Presentation
:
Wade will cover and provide some real-life examples of practical issues faced by a food producer in getting quality product to market. He will further detail the trials and processes of identifying the challenges in diagnosing faults. Wade will cover some practical steps for rectifying failures, and what this might mean for other food suppliers, as well as more generally.

Profile:
Wade has over 15 years of experience across multiple business functions in the fast moving consumables sector. Currently, he is the logistics cold chain compliance leader at Lion Dairy and Drinks. In the last four years, he has been part of a material body of research in the outbound cold chain (warehouse to customer) that has identified significant opportunity to step change the product quality and customer service offering, deliverable to the end consumer. 
 


Xiaolin (Shannon) Wang, Stud.AIRAH

Australian National University 
Current challenges of CO2 gas hydrate technology in cold thermal energy storage applications

Presentation:
Cold thermal storage for air conditioning is a cost-effective solution to peak load capacity problems for electricity transmission and distribution infrastructure. Wang will discuss a range of outcomes on the use of CO2 hydrate technology for cold thermal storage. Through previous research, technical issues such as equilibrium pressure, sub-cooling, induction time and cyclic stability are studied. This work provides a summary of the remaining unsolved or overlooked issues and challenges related to this technology. This mainly includes limited mass transfer and heat transfer, additive impairment and needs for temporary CO2 gas storage in CTES. 

Profile:
Wang graduated from the Australian National University in 2017, where she is now a lecturer. Her research interests include HVAC system efficiency, CO2 gas hydrate-based thermal storage and carbon capture, phase change material embedded building components and solar cooling. She was recognised in 2016 at the AIRAH Awards as Student of the Year – Higher Education or Research. 
 

Felix

Felix Weber

Thermofin

Presentation:
Heat exchanger technologies for the HFC phase-down

The HFC phase-down in Europe has led to massive price increases for HFC refrigerants. The industry’s change to natural refrigerants such as ammonia, CO2 and propane is creating a challenge for the contractors, as well as for the equipment manufacturers. This has led to an increased focus on energy efficiency when evaluating refrigeration plants.

Weber will provide an overview of the requirements for heat exchangers that either cool or heat air. The focus will mainly be on natural refrigerants and the corresponding heat exchanger technologies. As a final excursion into the energy efficiency discussion, the presentation will include an overview of energy-conserving defrost concepts. This includes air defrost for insulated (pod) coolers and defrost dampers for cubic coolers in combination with glycol defrost.

Profile:
Weber has a Bachelor and Master’s degree in industrial engineering from the Technische Universität Bergakademie, Freiberg. During his studies, Weber decided to specialise in energy technology with a focus on thermodynamics, heat transfer and fluid mechanics. 

Weber joined Thermofin in 2013 and has worked for clients on a variety of large, international projects in the industrial refrigeration and food industries.

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Chien-Yuh Yang

National Central University (Taiwan)
Condensation heat transfer performance of refrigerants HFO-1234yf and HFC-134a in a plate heat exchanger

Presentation:
Yang will present his research into the comparisons between HFO-1234yf and HFC-134a. HFO-1234yf has similar thermodynamic properties to HFC-134a but a much lower GWP value and is expected to be a good replacement candidate in the near future. This study provides an experimental comparison of flow condensation heat transfer performance of refrigerants HFO-1234yf and HFC-134a in a chevron plate heat exchanger.

Profile:
Yang is a professor in the department of mechanical engineering at the National Central University in Taiwan. His current research interests include air conditioning and refrigeration, heat exchanger design, solar energy, electronic devices cooling, two-phase heat transfer, heat transfer enhancement and micro-scale heat transfer. He has conducted over 100 heat transfer-related research projects, most supported by industrial companies. Yang has co-authored more than 100 journal articles and conference papers and has over 10 heat exchanger-related patents.