Because the geothermal fluid leaves the heat exchanger at 196F in the mixture cycle, it could be used in heat exchange with a second working fluid mixture to obtainadditional work. Thus, a cascade system of two or more binary cycles could be developed to increase thework obtainable per pound of geothermal fluid passing through the geothermal power plant.

a situation which should minimize irreversibilities in the condenser

The fact that the mixtureand the isobutane leave the turbine with 138 F and 167 Fsuper-

The geothermalfluid is considered to have the properties of supercooled liquidwater

On the other hand, an essentially infinitespectrum of property behavior characteristics exists for mixtures and thus a mixture can in principle befound which matches the resource characteristics better than virtually any possible pure-fluid choice

(a) Higher pressures can beused in the cycle, which increases the net cycle thermalefficienc

the working fluid in the power production cycle (e.g.Rankine-type cycle) receives energy by heat transfer with the geothermal fluid