  Two testable schemes for quantum heat engines are investigated under the
quantization framework of noncommutative (NC) quantum mechanics (QM). By
identifying the phenomenological connection between the phase-space NC driving
parameters and an effective external magnetic field, the NC effects on the
efficiency coefficient, \mathcal{N} , of quantum engines can be quantified for
two different cycles: an isomagnetic one and an isoenergetic one. In addition,
paying a special attention to the quantum Carnot cycle, one notices that the
inclusion of NC effects does not affect the maximal (Carnot) efficiency,
\mathcal{N}^C, ratifying the robustness of the second law of thermodynamics.
