Hi Marco,
here are some works where energy footprint of OWL reasoning was measured, with a focus on mobile systems:
[1] Patton, E.W., McGuinness, D.L.: A power consumption benchmark for reasoners on mobile devices. In: International Semantic Web Conference. pp. 409-424. Springer (2014).
[2] Valincius, E., Nguyen, H.H., Pan, J.Z.: A Power Consumption Benchmark Framework for Ontology Reasoning on Android Devices. In: OWL Reasoner Evaluation (ORE) Workshop. pp. 80-86 (2015).
[3] Guclu, I., Li, Y.F., Pan, J.Z., Kollingbaum, M.J.: Predicting energy consumption of ontology reasoning over mobile devices. In: International Semantic Web Conference. pp. 289-304. Springer (2016).
[4] Koopmann, P., Hahnel, M., Turhan, A.Y.: Energy-Efficiency of OWL Reasoners - Frequency Matters. In: Joint International Semantic Technology Conference. pp. 86-101. Springer (2017).
My research group has recently released evOWLuator, a cross-platform, energy aware evaluation tool for OWL reasoners:
https://github.com/sisinflab-swot/evowluator
Kind regards,
Floriano