Experimental Determination of the Performances during the Cold Start-Up of an Air Compressor Unit for Electric and Electrified Heavy-Duty Vehicles

Gianluca Valenti, Stefano Murgia, Ida Costanzo, Matteo Scarnera and Francesco Battistella
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Gianluca Valenti: Department of Energy, Politecnico di Milano, Via Lambruschini 4/A, 20156 Milano, Italy
Stefano Murgia: Ing. Enea Mattei S.p.A, Strada Padana Superiore 307, Vimodrone, 20055 Milano, Italy
Ida Costanzo: Ing. Enea Mattei S.p.A, Strada Padana Superiore 307, Vimodrone, 20055 Milano, Italy
Matteo Scarnera: Department of Energy, Politecnico di Milano, Via Lambruschini 4/A, 20156 Milano, Italy
Francesco Battistella: Department of Energy, Politecnico di Milano, Via Lambruschini 4/A, 20156 Milano, Italy

Energies, 2021, vol. 14, issue 12, 1-14

Abstract: Compressed air is crucial on an electric or electrified heavy-duty vehicle. The objective of this work was to experimentally determine the performance parameters of the first prototype of an electric-driven sliding-vane air compressor, specifically designed for electric and electrified heavy-duty vehicles, during the transient conditions of cold start-ups. The transient was analyzed for different thermostatic temperatures: 0 °C, −10 °C, −20 °C, and −30 °C. The air compressor unit was placed in a climatic chamber and connected to the electric grid, the water-cooling loop, and the compressed air measuring and controlling rig. The required start-up time was greater the lower the thermostatic temperature, ranging from 30 min at 0 °C to 221 min at −30 °C and depending largely on the volume of the lubricant oil filled initially. The volume flow rate of the compressed air was lower than nominal at the beginning, but it showed a step increase well beyond nominal when the oil reached 50 °C and then decreased gently towards nominal, while the input power kept steady at nominal after a short initial peak. These facts must be considered when estimating the time and the energy required by the air compressor unit to fill up the compressed air tanks of the vehicles.

Keywords: transport sector; positive-displacement compressor; sliding-vane compressor; climatic chamber; transient behavior (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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