3.1. Temperature, relative fuel–air ratio and thermal efficiency profiles
Inlet and outlet water temperatures in the boiler are shown in Fig.?2 (left). One of the system requirements was that lgk974 the inlet water temperature should be comparable for all the experimental campaign in order to avoid inaccuracies in the comparison of results. Given the experimental set-up configuration, the hot water returned to the water storage tank (at the upper of the tank) and hence, the water inlet temperature (at the bottom of the tank) increased slowly in time. In spite of this limitation, both inlet and outlet water temperature at each screw position were very similar for the conventional and the alternative fuels. Before set point temperature was reached (60 °C), a comparable evolution of outlet water temperature was obtained for all the tests.
Fig.?2. Water temperature (left) and exhaust temperature (right).Figure optionsDownload full-size imageDownload as PowerPoint slide