Performance of Centrifugal Chillers using Hydrocarbons. Centrifugal chillers cool most large buildings. Their energy consumption and fluorocarbon emissions are a global environmental concern. A 40% increase in rotational speed and replacement of the fluorocarbon refrigerant by a hydrocarbon is proposed. Over 4% energy savings with no performance changes is predicted. The aims are to prepare a conversion protocol, measure chiller performance before and after conversion, develop a new model of ....Performance of Centrifugal Chillers using Hydrocarbons. Centrifugal chillers cool most large buildings. Their energy consumption and fluorocarbon emissions are a global environmental concern. A 40% increase in rotational speed and replacement of the fluorocarbon refrigerant by a hydrocarbon is proposed. Over 4% energy savings with no performance changes is predicted. The aims are to prepare a conversion protocol, measure chiller performance before and after conversion, develop a new model of evaporator heat transfer and correlate the model with chiller measurements. The capital cost of compliance with the Montreal Protocol for a large building will be reduced by $10,000 with about $5,000 in annual energy cost savings.Read moreRead less