The ATMOsphere America Review Panel has announced the first case study selection for ATMOsphere America 2016, which will be held on 16 & 17 June in Chicago.
Presentations by Danfoss, Hillphoenix, Baltimore Aircoil Company, CIMCO, Heatcraft and Optimised Thermal Systems will feature on a comprehensive programme of over 15 sessions at the two-day conference.
The case studies will cover a cornucopia of topics including ejector technology, integration of CO2-based refrigeration and HVAC requirements in supermarkets, and NH3/CO2 cascade system for retailers and cold storage facilities and training for natural refrigerant-based systems.
Ejector technology: The next generation in transcritical CO2 by Kenneth Bank Madsen, Danfoss
Kenneth Bank will outline the latest developments in ejector technology, which has the potential to make transcritical CO2 a viable, energy-efficient solution in any climate.
Since September 2014, Danfoss has been testing CO2 ejector technology in a southern European supermarket designed with a single system that combines air conditioning, heating, and medium- and low-temperature refrigeration. The test period delivered reliability and significant reductions in both average and peak energy consumption during warm periods, and demonstrated that ejector technology can reduce initial costs as well as delivering significant energy savings.
Expanding CO2 technology to new markets by Dustan Atkinson, Hillphoenix
Atkinson will discuss lessons learned from applying CO2 booster technology in cold storage and other industrial applications, and compare and contrast these with traditional food retail applications. He will also address the use of CO2 booster technology in ice rinks, highlighting improvements in ice quality compared to traditional HFC solutions.
The case study will cover primary drivers persuading many to convert to CO2 systems in these applications, and return on investment, concluding with an exploration of other related spaces where CO2 booster technology has been used, discussing methods for evaluating additional applications.
Training & Installation: Best Practices for CO2 booster technology by Rusty Walker, Hillphoenix
With increasing adoption of CO2 booster technology, training and proper installation practices are more important than ever. This presentation will provide an overview of best practices for training programmes and installation for CO2 booster systems.
The study will explore training programmes currently available on the market as well as best practices for ensuring that technicians in the field are appropriately trained.
Total cost of ownership software for transcritical CO2 systems by Philip Hollander, Baltimore Aircoil Company
Baltimore Aircoil has developed Total Cost of Ownership (TCO) software that allows a user to perform an evaluation between an air-cooled gas cooler and a hybrid gas cooler/condenser for transcritical CO2 systems. ASHRAE design and bin weather data, plus utility costs (general and demand charges) are included for 200+ cities, allowing peak energy, annual energy consumption, water consumption, and overall utility costs to be considered for the compressors and gas coolers in transcritical CO2 systems.
Charts showing the seasonal performance of different equipment provide easy visual representation of the annual system operation. Detailed data on energy usage, water consumption, and effective CO2 emissions reduction is also calculated and presented.
Fruit and vegetable storage goes natural refrigerant in Quebec by Benoit Rodier, CIMCO Refrigeration
Between 2010 and 2013, CIMCO installed four industrial refrigeration systems in fruit and vegetable cold storage facilities. The case study will explore the complex refrigeration requirement for fruit and vegetable storage, maintained by systems consisting of central ammonia systems located in the mechanical room, which cool single or double CO2 brine loops, which is circulated to the various rooms. Many technical challenges were faced in designing this system, including the handling of the increased pressures of CO2.
Practical applications of an ultra-low-charge NH3/CO2 cascade system in a retail environment by Masood Ali, Heatcraft Worldwide Refrigeration
The presentation will provide illustrations of an ultra-low-charge NH3 system in cascade with CO2 for use in supermarket and cold storage applications that has incorporated a variety of design features that are highly energy efficient, leading to reduction in TCO of up to 20%.
Heatcraft will dispel the myths of regulatory hardships and prove immunity to regulations by sharing experiences from a Piggly Wiggly store in Columbus, GA, USA, which utilises the ultra-low charge NH3/CO2 cascade system. This study will share the lessons learned and validate the design and performance evaluation of the NH3 system in the supermarket environment.
Design, Construction, and Testing of Geothermal CO2 Air Conditioner by Paul Kalinowski, Optimized Thermal Systems
In this project, a geothermal air conditioner with a 2-ton (7.0 kW) cooling capacity was designed, built, and tested. The COP of the heat pump is 4.8 based on the test conditions stated in the ISO 13256-1 standard. The performance of the cooling system was optimized for various air and water inlet temperatures.