**4. Conclusions**

This study attempts to quantify the impact of the water content of methanol and ethanol fuels on their energy potential, combustion characteristics, and fire risk. The results of the study may be summarized in the following conclusions.


and ethanol on the environment is determined only the CO yield (mainly per released heat). Minimizing the impact of methanol and ethanol combustion on the environment can thus be achieved by minimizing the water content.


Based on these conclusions, it is possible to state that increase of the water content of the examined fuels has a significant effect on the effective heat of combustion decrease and a moderate effect on combustion efficiency decrease. Based on these conclusions, it is also possible to state that the water content of the examined alcohols has an adverse effect on the environmental impact and fire risk. While most components of fire risk (flash point and released heat) decrease with increasing water content, the environmental impact of combustion (CO yield to released heat) increases as the water content increases.

**Author Contributions:** Conceptualization, J.M.; Methodology, J.M., I.W., and P.R.; Investigation, P.R. and I.W.; Formal analysis, J.M.; Resources, J.M.; Visualization, J.M.; Writing—original draft, J.M.

**Funding:** This work was supported by the Slovak Research and Development Agency under the contract No. APVV-16-0223.

**Conflicts of Interest:** The authors declare no conflict of interest.
