Szukana fraza: [Abstract = "Nevertheless, they still hold a cost, which is still too high to make them attractive. Nonetheless, if the modules are applied to a heat source which otherwise would be wasted, the attractiveness of the solution certainly rises. In this study, a thermodynamic analysis of a stove\-fireplace is presented, considering both combustion process and the flame \- walls heat transfer of the. A design solution for a concentrator device to funnel the wasted heat from the fireplace to the thermo\-electric modules is also presented."]