INFLUENCE OF THE INITIAL STEAM PARAMETERS ON THE OPERATION EFFICIENCY OF THE SHIP UTILIZATION TURBINE
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- TITLE: INFLUENCE OF THE INITIAL STEAM PARAMETERS ON THE OPERATION EFFICIENCY OF THE SHIP UTILIZATION TURBINE
- ABSTRACT: The search for technical solutions aimed at improving the reliability of marine steam turbines (including exhaust-driven turbines), which have a part of the expansion process in the two-phase zone (wet steam), is an important issue in the operation of marine power plants. To date, not all practically important tasks of two-phase mechanical environments are fully resolved. Questions of optimization of lattices and shapes of flowing parts of the turbines working on water charged steam remain open. No less important in this regard is the correct choice of parameters and the distribution of heat differences by stages of the turbine. Research work in the field of water charged steam turbines shows the need to develop specific recommendations for the most efficient (in terms of energy loss and erosion wear of the blades) their operation. The purpose of this study is to develop recommendations for the optimal choice of parameters of the stages of steam turbines running on wet steam. The results of the analysis of the influence of the initial steam pressure in the last stages of wet-steam ship turbines allows to avoid unfavorable (in terms of final humidity) operating modes and thus increase their efficiency and erosion reliability. The most economical mode of operation for recycling steam turbines that use low-potential heat of exhaust gases and operate in the field of wet steam with a significant level of humidity is the mode in which the steam pressure at the inlet of the turbine is about 0.7 MPa. An increase of this pressure leads to a significant increase of humidity and, consequently, a decrease in efficiency. Reducing the pressure by less than 0.6 MPa significantly affects the efficiency of the turbine due to the reduction of the available heat transfer, which makes the use of exhaust-driven turbines impractical.
- PAGES: 7-
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