Design of a 30-HP Solar Steam-Powered Turbine. Topical Report

摘要

The type-selection and complete design of a 30hp turbine which operates on superheated steam are described. The steam obtains most of its energy (the latent heat of vaporization) from solar energy at approximately 100 exp 0 C (design) and is then superheated by a fuel energy source to 600 exp 0 C (design). The turbine is designed for an exit pressure of 10.086 kPa(abs) corresponding to a condenser temperature of 46 exp 0 C (115 exp 0 F), as required for air-cooled condensers. The turbine selected is of counter-rotation radial outflow design, employing 10 rows of reaction-type blading, and it operates at 15300 rpm (design). The calculated turbine efficiency at design conditions is 75%, well above the efficiency of existing steam turbines of same power and steam conditions. Extensive calculations of the turbine efficiency at off-design conditions indicate a very small deterioration in efficiency, of the order of a few percent, over the practical range of operations. (ERA citation 07:042907)