| 摘要 |
A plurality of independent, closed Rankine cycle power plants, (12A, 12B, 12C) having respective vaporizers (13A, 13B, 13C), are powered from heat in a medium or low temperature fluid e.g. geothermal fluid or liquid waste which flows serially through the vaporizers and then to respective preheaters (19A, 19B, 19C) of the power plants, which are connected in parallel. The fluid heats the plants' working fluid to the evaporization temperature, in the pre heaters and supplies the latent heat of vaporization to the working fluid in the vaporizers. As compared to a conventional cascaded power plant, the temperature drop of the fluid can be increased without reducing the efficiency. Alternatively, the temperature drop can be maintained but the efficiency can be increased. In either case, the power produced by the power plant increased. <IMAGE> |
