The ATMOsphere Review Panel has announced its first round of case studies selected for ATMOsphere Asia 2015, which will take place from 3-5 February in Tokyo, Japan. A second round of case study selections will be announced in the coming days.Mayekawa Australia, Danfoss, BITZER, REI-TECH, Kawasaki Thermal Engineering and Denso will be presenting their innovative natural refrigerant technologies and/or projects covering a range of applications including commercial & industrial refrigeration, heat pumps and air conditioning.
Commercial refrigeration technology case studies session
Empirical evaluation of the annual efficiency for a trans-critical R744 booster system with parallel compression in Asian climate conditions and sample applications by Oliver Javerschek, BITZER
Looking at supermarket applications, booster systems represent the most common system type for transcritical CO2 applications. The application of parallel compression is an increasingly applied as one of the methods for increasing the annual COP of these types of systems in warmer climates. Bitzer will present the potential for an improved energy efficiency with parallel compression with a state-of-the-art transcritical CO2 booster system with flash gas bypass, which was installed at BITZER’s Rottenburg site for practical training seminars in autumn 2010. The case study will also provide further information about systems with parallel compression applied in the field.
Retailers Ensure Sustainable Technology Uptake - KIWI case Norway and transcritical technology fitting Asia by Anders Juul, Danfoss
Focusing on a CO2 refrigeration system set up by Danfoss and Carrier in a Kiwi supermarket in Auli, Norway, the presentation will discuss how the 1,300 square meter store expects to save 50% on electricity, a reduction similar to 100 private homes. The refrigeration system is the main energy source for heating the store. The recovered heat is primarily used for space and water heating and ventilation.
In the summer, 200 meter deep energy wells keep the store temperature at a pleasant level. In the winter, the refrigeration system is used as a heat pump. The wells serve as energy sources for the heat pump and as storage for surplus energy for heating up the store. Due to heavy snow in Norway, the refrigeration system also provides energy for an outdoor snow melting system in the area for loading and unloading groceries. 1,300 square meter solar panels on the roof help cut down the electricity bills by producing energy for lighting and ventilation. Inside the store, LED lighting and natural light help the store achieve additional savings on electricity.
The project in Norway serves as an example for environments with an annual average temperature less than 30°C such as Japan, Korea, Mongolia and northern China.
Plug-in Hydrocarbon Showcase: Natural refrigerants for commercial freezers - Introduction and Practical experience by Kazuhiro Tatewaki, REI-TECH
The presentation focuses on R290 plug-in showcases by AHT Cooling Systems that are both eco friendly and energy saving, cutting power consumption by 50% compared to conventional products. The show cases use only 120g of R290, ensuring safety in regards to flammability concerns. REI-TECH has installed AHT plug-in showcases in about 100 Save On stores based in Gunma, which have received high evaluations for energy savings and sustainability. The presentation will discuss the results seen at the Save On stores. In addition, feedback from an Odoya supermarket in Chiba and Homac-nicot in Tohoku find that the showcases are also convenient as they require “no work” for installation and maintenance.
Industrial refrigeration & other applications session
The application of NH3 heat recovering high temperature heat pump hot water generation for the meat industry in New Zealand by Martin Millow, Mayekawa Australia
Modern industrial refrigeration systems typically consist of single and/or multi stage ammonia compressors to provide cooling solutions for numerous applications and processes. More often than not, the heat absorbed from within the refrigerated space, plus the heat of compression is rejected to the atmosphere via an air, evaporative or water cooled condenser. With the current and ongoing environmental challenges and the global expectation of improving energy efficiency, rejecting such a large amount of heat without utilization can be deemed as wasteful.
A large number of industrial refrigeration system users often require large quantities of hot water for either wash down, boiler make up, or CIP processes. The presentation will focus on generating useful hot water via an ammonia heat pump, rather than rejecting the refrigeration system heat. This offers an energy efficient method of useful and sustainable hot water generation for many industries.
Performance of solar air conditioning system using solar absorption chiller in Indonesia by Jongsoo Jeong, Waseda University
The presentation will focus on a single-double effect combined absorption chiller exclusively designed for solar cooling systems, which was launched in August 2010. A demonstration plant in Japan confirmed that the solar heat priority usage with the gas-based back up function operate properly and overall the system functions efficiently. In the summer, gas fuel reductions of around 10% could be achieved.
In addition, the case study will report on a model plant constructed at the University of Indonesia in January 2014 and evaluate the effects of solar absorption chillers on the reduction of energy consumption. The cooling capacity is 281W. The evacuated glass tube type solar energy collectors supply 75°C to 90°C hot water to the absorption chiller.
Development of micro-fin adsorption equipment for adsorption heat pump by Kenichi Nishikawa, Denso
An adsorption heat pump is a prospective energy saving technology for waste heat driven cooling devices or thermal driven heat pumps. Using water as the refrigerant, it is very environmentally friendly. Denso will present its ultracompact adsorption equipment with a micro-fin technology developed for a compact adsorption heat pump.
A general adsorber has a structure that is about 1mm think. Non thermal conductive adsorbent is attached on the thermal conductive fin produced by the general mechanical processing. This type of adsorber has three controlling factors which affect the adsorption rate: mass transfer of vapor to the surface of the adsorbent, diffusion of vapor to the surface of the adsorbent, diffusion of vapor in the adsorbent and heat transfer of adsorption heat to the heat transfer medium. In an analysis of each of their effects, heat transfer was found to be dominant.
To drastically improve this heat transfer, Denso developed a micro fin structure in which a mixture of several dozen μm adsorbent particles and copper powder is sintered with a high void ratio. With this technology, the dimensions of the micro fin adsorption unit are one fourth those of an adsorption unit with traditional technology.
About ATMOsphere Asia 2015
3-5 February 2015 at the Shin Marunouchi Building in Tokyo, Japan
ATMOsphere Asia returns for its second edition, once again serving as the meeting place for HVAC&R industry stakeholders from both Asia and around the world to discuss the latest natural refrigerant market trends, technology innovations and regulatory issues. The conference programme covers a range of applications including commercial, light commercial, industrial & transport refrigeration, heat pumps and air conditioning.
To register for the event, please visit www.ATMO.org/asia2015/registration
View preliminary programme
For general information, please visit www.ATMO.org/asia2015