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Paulo Rodrigues; Paulo Rodrigues
Harvested from ORCID Public Data FilePaulo Rodrigues in OpenAIRE João P. S. Bizarro; João P. S. Bizarro
Harvested from ORCID Public Data FileJoão P. S. Bizarro in OpenAIREFor work-producing heat engines, or work-consuming refrigerators and heat pumps, the percentage decrease caused by friction in their efficiencies, or coefficients of performance (COP's), is approximately given by the ratio W(fric)/W between the work spent against friction forces and the work performed by, or delivered to, the working fluid. This universal scaling, which applies in the limit of small friction (W(fric)/W
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