A Nontracking Moderately Focusing Heat Pipe Solar Collector

Abstract

condensation, however, raises several questions about the actual performance of fuels with metal additives in MHD power generation. The first and most important question is whether the metal oxides formed will actually condense as predicted by equilibrium calculations. The short time period spent by the combustion gases in the channel may be insufficient resulting in partial or no condensation, hence a much smaller power density than predicted. A determination of the degree of condensation to be expected in the channel is, therefore, crucial in the evaluation of the metal additives. Another aspect of condensation which must be considered is the effect of metal oxide condensation on the channel wall and electrodes. If condensation does actually occur, it will naturally occur at the coldest surface: the channel walls. Condensation at the walls could result in considerable loss. Evaluation of the magnitude of wall heat losses because of condensation is, therefore, also necessary in the evaluation of metals as fuel additives, as are techniques for the removal of condensed species from channel walls and electrodes.