  We evaluate Renyi entropy flows from generic quantum heat engines (QHE) to a
weakly-coupled probe environment kept in thermal equilibrium. We show that the
flows are determined not only by heat flow but also by a quantum coherent flow
that can be separately measured in experiment apart from the heat flow
measurement. The same pertains to Shanon entropy flow. This appeals for a
revision of the concept of entropy flows in quantum nonequlibrium
thermodynamics.
