The ATMOsphere Review Board has made its first round of selections for case studies to be presented at ATMOsphere Australia 2016, which will take place on 16 May in Melbourne, Australia. A second round of case study selections will be announced in the coming days.
Congratulations to Mayekawa Australia, Scantec Refrigeration Technologies, Gordon Brothers Industries, SCM Frigo, Carter Retail Equipment and Heatcraft Australia, who will present the following case studies during ATMOsphere Australia 2016.NH3 heat recovery high temperature heat pumps in Australia and New Zealand, Peter O’Neil, Mayekawa Australia
This case study will examine how a NH3 heat recovery high temperature heat pump has been developed to recover the absorbed heat from an existing refrigeration plant. Since the refrigeration and storage industries consume a lot of energy, power saving is urgently required. This can be achieved thanks to the NH3 heat recovery high temperature heat pump, which will be mainly explained in the presentation. With possible COP’s (coefficient of performance) in excess of 8.0 and the ongoing challenges we face to reduce carbon emissions, the ammonia hot water heat pump can offer an environmentally friendly and energy efficient method of hot water generation for many industries.
Energy performances of low charge NH3 systems in practice, Stefan Jensen, Scantec Refrigeration Technologies
The presentation will cover about half a dozen low charge NH3 systems, including the measured energy performances of two medium sized refrigerated distribution centers with respective storage volumes of approximately 10,000 and 40,000 m3. The performance evaluations are based on the electrical energy consumption as measured by the electrical energy provider over one calendar year. In the case of one plant, the contribution of the photovoltaic panels to the energy requirement of the facility as a whole is shown on a month by month basis. An energy performance comparison is also made between the two refrigerated distribution centers. The case study will also cover the design, installation and operating experiences associated with five new low refrigerant charge, dual stage NH3 dry expansion systems servicing refrigerated warehouses in various Australian locations. The plants employ a variety of different evaporator and liquid distributor types, two different refrigerant injection control methodologies, two different piping materials, two different oil separation/return methods, varying levels of internal evaporator surface enhancements and demand defrost.
An Overview of the Largest NH3/CO2 Cascade Refrigeration System in Australia, Scott Clydesdale, Gordon Brothers Industries
This case study provides an overview of the ammonia – carbon dioxide cascade refrigeration system installed by Gordon Brothers industries Pty Ltd for a large, greenfield abattoir facility in the Northern Territory. It was part of a complete kill floor to cooling process facility headed by Milmeq Pty Ltd. This is the first time a cascade refrigeration system of this scale has been constructed to provide all the refrigeration requirements for an Australian meat processing facility. Even though NH3/CO2 cascade systems have been used before, an exhaustive design review process was carried out to ensure the system would perform to the highest possible standard. This review proved to be a great success as the plant started extremely well and has run faultlessly since commissioning over a year ago.
Transcritical CO2 technology for retail solutions in Australia and New Zealand, Mirko Bernabei, SCM FRIGO
This case study will cover various CO2 applications in SCM Frigo has been involved in Europe and lately also in New Zealand. Our experience includes cascade systems, CO2 boosters and parallel compression and ejectors. SCM offers solutions to improve the performance in hot climates. The existing solutions include a combination of vapour ejector and parallel compression, but mechanical subcooling or a water spray system are also viable options. The advantages of parallel compression are that it removes directly the flash gas at intermediate pressure, saving up to 20% compared to R404a. SCM FRIGO has been performing laboratory and field tests with the Danfoss multi-ejector since 2015. The mechanical subcooling, a packaged air-condensed R290 chiller equipped with a single reciprocating compressor prototype has been tested in a laboratory since early 2016. The expected results of the mechanical subcooling in a +35 degree temperature environemnt will be discussed.
Self contained display cases with a hydrocarbon refrigerant running on a water loop for heat rejection, Ian Garvey, Carter
The presentation will examine a system developed by Carter Retail Equipment (CRE) in 2009, deployed throughout the UK with currently over 20,000 systems in the field, and the technology migrating into Europe and South East Asia. In 2015 a project was delivered to Coles Supermarkets to validate the system benefits as the first scheme in Australia to feature higher system charge hydrocarbon self-contained cases. Due to increased ambient conditions in Australia, a new variant of the system was designed using a Dry Air Cooler instead of chilled water as the cooling medium, providing a major benefit in terms of capital cost. The multiple benefits include non-existent leakage, the use of the natural refrigerant R1270, which provides energy savings and capacity benefits, and finally reliability since the system is factory assembled and involves no control valves, nor system access. The case study will showcase the results, which indicate 16% reduction in maintenance (system) and 39% reduction in direct and indirect emissions (leaks) in the UK. CRE has installed power monitoring at the Coles Coburg site and recently at the Coles Yarraville site as a comparison, and the data being collected will form an integral part of the presentation.
Ultra-low charge NH3/CO2 cascade system in a retail environment, Masood Ali, Heatcraft Australia
Heatcraft Worldwide Refrigeration presents a case study for the-state-of-the-art NH3/CO2 Cascade refrigeration system utilizing all natural refrigerants for supermarket and cold storage applications. Natural refrigerants, such as NH3 and CO2, yield superior thermodynamic performance in vapor-compression cycles. The presentation will provide illustrations of an ultra-low charge NH3 system in cascade with CO2, that has incorporated a variety of design features that are highly energy efficient, leading to reduction in TCO (Total Cost of Ownership) up to 20%. Heatcraft will share experiences from a Piggly Wiggly store in Columbus, GA, USA, which utilizes the ultra-low charge NH3/CO2 cascade system. This study will share the lessons learned and will validate the design and performance evaluation of the NH3 system in the Supermarket environment. Results of preliminary energy efficiency data directly obtained from the real-life operating store will be presented with a NH3 system and a HFC system that is installed at the store, giving an unparalleled comparison between NH3 and HFC systems.
About ATMOsphere Australia 2016
The ATMO events are not only growing in size, but also conquering new territory, as the first ATMOsphere Australia 2016 will be held in Melbourne on 16 May. Established as a significant forum for discussions on the business case for natural refrigerants in several regions, the focus will now shift to Australia and New Zealand. The ATMOsphere Australia 2016 participants will discover emerging trends in commercial and industrial refrigeration as well as air conditioning with natural refrigerants.
The conference will consist of a full programme of end user and supplier panels, policy, market trends and technology case study sessions, without forgetting the unparalleled networking opportunities. An exclusive reception will be the perfect ending to this information-packed one-day event. ATMOsphere Australia 2016 is a truly unique opportunity to meet and build lasting partnerships with leading end users, contractors, suppliers and government representatives.
To register for the event, click here.
View the preliminary programme.
For more information about ATMOsphere Australia 2016, please visit
http://www.atmo.org/australia2016.
