Process Heating & Cooling Show
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Process Heating & Cooling Show
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Giacomo Pisano

Giacomo Pisano

Technical Sales Director
DORIN USA

After obtaining his Masters degree in Mechanical Engineering in 2002, Giacomo worked as a Project Manager for General Electric's Oil & Gas division, core business being turbomachinery applied to the oil & gas industry. He joined DORIN in 2003 in the R&D department, taking responsibility of the CO2 compressor development and being in charge of the product's technical qualification. Giacomo Pisano then took over several application engineering roles and is currently responsible for the CO2 compressors' business development. In the meantime he joined several ASERCOM working groups and was the Chairman for the association's CO2 working group for many years.


CO2 Chillers for Process Cooling Applications: Performance Comparison with HFC/O's, Other Natural Refrigerants and Relevant Field Experience

Since several years carbon dioxide (CO2 - R744) has been identified as one of the best alternatives to high GWP refrigerants in a number of market sectors, such as supermarket and cold storage refrigeration or sanitary hot water heat pumps. However, industry is still concerned about its use in process cooling chillers, with lower energy efficiency being considered as a limiter in this sense.
This work describes a performance comparison between various executions of a process cooling chiller featuring 2,000 kbtu/h cooling capacity: HFC/Os, ammonia, propane and carbon dioxide performance are calculated within a yearly scenario and referring to various North American climate profiles. Performance investigation shows that thanks to appropriate enhancements to the standard cycle CO2 chillers are able to provide very high yearly efficiency levels. Field experience shows that calculated performance matches calculations with reasonable accuracy, this providing consistency to the performance investigation between the described solutions.


Process Heating & Cooling Show Speakers
Process Heating & Cooling Show Agenda