For power generation the steam turbine offers many advantages over other prime movers, both mechanically and thermodynamically. Mechanically, its rotary force is applied directly to a shaft, producing a constant torque with minimal out-of-balance forces. Its flexibility in size and power output offers stable power generation for small and large capacity units in combined cycle, fossil-fuelled and nuclear plant. However, its rotating parts demand that the steam supply must be of high purity to avoid deposition and corrosion, the lube oil system must be totally clean, cooled and reliable and the materials of construction must withstand high temperatures and loadings to facilitate a high thermodynamic efficiency in converting heat into kinetic energy by expanding a superheated steam flow to a very low back pressure and temperature.
ETD has produced Guidelines that provide a detailed understanding of the steam turbine’s component parts and the principles by which it operates. The report also provides an insight into the factors that have a major effect on the performance. The operation and maintenance requirements that ensure the asset’s reliability, efficiency and service life are also detailed.