We are proud to announce that we have selected another four Technology Case Study Presentations to be given at ATMOsphere Europe 2012.
Below you will find a short summary of the case studies selected:
Natural Refrigerants in Different Industrial Heat Pump plants in Norway by Jan Boone, Mayekawa:
Jan Boone will present operational results in the field of NH3 heat pumps in two plants in Norway. The first plant uses screw compressors to produce cooling and heating in an energy station. Cooling is used to produce ice water used in office cooling and cooling for a data center. Heating is used to produce hot water at a maximum of 82°C for district heating. The second plant uses screw compressors in a heat pump plant, which utilises waste heat from a slaughter house as a heat source, and produces hot water at 52°C for preheating of hot water, and heating of production facilities. The plant was started in 2011 and operated approx. 5000hrs at an overall heating COP of 6.
Heat recovery with CO2 Systems in Food Retail by Torben Funder-Kristensen, Danfoss:
Two case studies will be presented, one involving a middle sized and one involving a small supermarket. Instead of rejecting heat into the ambient, heat is reclaimed to warm up sanitary water and water for space heating. CO2 shows splendid characteristics for this application because it is easy to control the discharge temperature. Very good overall COP improvements are seen and a short pay back on investment are shown.
Efficiency analysis and comparison of innovative CO2 refrigeration systems by Jonas Schönenberger, Frigo Consulting:
In an ongoing research project commissioned by the Swiss Federal Office of Energy, the company is investigating the efficiency of existing, innovative CO2 refrigeration systems and developing additional innovative proposals to further increase the efficiency of transcritical CO2 refrigeration systems. In the project that will be presented, the operation of existing CO2 refrigeration systems with an expansion‐compression‐unit, with an adsorption chiller as well as with parallel compression will be analysed in detail and compared in efficiency, life cycle costs, market potential and lessons learned. The findings from the research project will help to develop appropriate ways to increase the efficiency of the CO2 technology further and will help to push and spread the technology in existing and new applications.
Field Measurements of Supermarket Refrigeration Systems: CO2 transcritical vs. HFC conventional by Samer Sawalha, KTH:
The case study will present experiences in applying CO2 in supermarket refrigeration and in ice rinks. Computer simulation modelling, laboratory experimental work and actual field measurements were used to investigate CO2 in indirect, cascade and transcritical refrigeration systems. In this case study the cooling demands and the COP of five CO2 transcritical and three conventional supermarket installations will be presented. The key parameters to evaluate the system’s performance, such as cooling capacity and COP, have been calculated using the collected data and the different systems have been compared.
Preliminary programme
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