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Summary of two papers of the 9th International Conference on Compressors and Coolants (ICCC2017)
2018/01/13
10/01/2018
The IIR 9th International Conference on Compressors and Coolants (ICCC2017), which took place in Bratislava, Slovakia, in September 2017, addressed advances in compressors but also refrigerating technologies and alternative refrigerants, as illustrated by the two following paper summaries:
 
Ejection systems can be driven by free or inexpensive low temperature heat source, either solar or waste heat, as the main source of energy instead of electricity. In their paper*, K. Smierciew et al stress that these systems can be thought as a real alternative to compression devices in air-conditioning technologies. Ejection refrigeration systems correspond to a modification of vapour compression cycle. Instead of pressurising the refrigerant with a mechanical compressor, an ejector compresses refrigerant vapour flowing from evaporator and discharges it to the condenser. The motive vapour is generated in the vapour generator, which is heated by low-temperature heat source.Numerical and experimental investigations presented by the authors confirmed that the ejection cycle operating with isobutane can effectively be driven by low temperature heat source, e.g. lower than 75°C. Under this range of motive temperature heat sources, the ejection cycles can be considered as truly competitive in comparison with absorption refrigeration systems
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