Gross D, Hanenkamp N (2021)
Publication Language: English
Publication Type: Journal article, Online publication
Publication year: 2021
Book Volume: 98
Pages Range: 523-528
Article Number: PROCIR397806
URI: https://www.sciencedirect.com/science/article/pii/S221282712100175X
DOI: 10.1016/j.procir.2021.01.145
Open Access Link: https://www.sciencedirect.com/science/article/pii/S221282712100175X
Cryogenic minimum quantity lubrication (CMQL) extends the application spectrum of cryogenic cooling by the possibility of lubrication. This enables the proportion of both cooling and lubrication capacity to be adapted to the process as required. Especially liquid CO2 has been established for the CMQL. This application enables a sustainable use of CO2 in a circular cycle opposed to its emission to the atmosphere. For a comparison of conventional flood cooling with CMQL, the specific energy has to be determined in addition to the process-related suitability. Specifications by the European Commission and the desire for sustainable production require a quantification of the environmental impact. For the determination of these product carbon footprints, energy demand forecasts are essential. This paper presents a method for calculating the energy demand for milling processes under CMQL and wet machining according to the life cycle assessment EN ISO 14044 taking the material flows into account. The considered material flows include the cutting energy of the process, the energy to provide the water for the emulsion for flood cooling, the energy to liquefy the CO2, the energy for the oil refining process for emulsion and CMQL, the energy for the coolant pumps and the energy for the manufacturing of the tools. The balancing is carried out for a defined functional unit. Due to the different tool lifetimes, there are large fluctuations in the energy requirements. It is shown that despite the high energy expenditure for the provision of CO2 and the energy supply for flood cooling, the most significant influence on the energy expenditure results from the manufacture of the tools. By increasing the tool life and increasing the number of tool regrinding cycles, the energy requirement for the functional unit can be reduced.
APA:
Gross, D., & Hanenkamp, N. (2021). Energy Efficiency Assessment of Cryogenic Minimum Quantity Lubrication Cooling for Milling Operations. Procedia CIRP, 98, 523-528. https://doi.org/10.1016/j.procir.2021.01.145
MLA:
Gross, Daniel, and Nico Hanenkamp. "Energy Efficiency Assessment of Cryogenic Minimum Quantity Lubrication Cooling for Milling Operations." Procedia CIRP 98 (2021): 523-528.
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