Abstract
The purpose of the conducted research was to develop a method for determining parameters of GTE regenerator, which would ensure at the initial stages of designing a minimum mass of the heat exchanger with the assigned values of efficiency. We obtained dependences that establish relationships between the regenerator and the GTE, which allow analyzing the influence of effectiveness and pressure losses in regenerator on the efficiency of GTE and the mass of the regenerator. Relationship between parameters of the regenerator and performance efficiency of regenerative GTE was described by functional dependence, where energy parameters of the regenerator are collected in a single complex. It was established that the magnitude of effectiveness of the regenerator is associated with efficiency by inversely proportional function, and pressure losses – by linear function. Effectiveness of the regenerator is associated with the mass of the heat exchanger and the geometry of heat exchange surface by exponential dependence, and relative pressure losses – by algebraic irrational function. Based on these dependences, the algorithm for selecting rational energy and geometrical parameters of regenerators of GTE was developed. It was found that by selecting rational values of effectiveness of regenerator and pressure losses, it is possible to provide for a significant decrease in mass of the regenerator with a constant value of performance efficiency of GTE. The obtained results of calculations of regenerators of GTE with different structural solutions allow a designer engineer to choose rational values of effectiveness of the regenerator, pressure losses, and initial gas temperature. Comparison of complex regenerative GTE by the mass of regenerator at constant values of performance efficiency was conducted. Based on the analysis of results of calculations, the stage dependence of specific mass of regenerator on the assigned increase in performance efficiency of regenerative GTE was obtained, which gives the possibility to estimate the mass of tubular regenerator at the initial stages of designing. Implementation of the obtained results into the practice of designing regenerative GTE will make it possible to ensure the choice of their rational parameters and to decrease the time of designing.
Highlights
Under conditions of constant growth of fuel prices, reduction of fuel stocks and possible interruption in deliveries, one of the main tasks in the process of creating plants for the generation of mechanical and thermal energy is to decrease the consumption of energy resources [1]
As a result of conducted studies into the influence of parameters of the regenerator on the efficiency of gas turbine engines (GTE) and the mass of regenerator, it was found that due to the choice of rational values of effectiveness of the regenerator and pressure losses, it is possible to ensure a significant decrease in the mass of the regenerator at a constant value of efficiency of GTE
Relationship between parameters of regenerator and efficiency of regenerative GTE was described by functional dependence where energy parameters of regenerator are collected in a single complex
Summary
Under conditions of constant growth of fuel prices, reduction of fuel stocks and possible interruption in deliveries, one of the main tasks in the process of creating plants for the generation of mechanical and thermal energy is to decrease the consumption of energy resources [1]. In the global energy sector, the introduction of gas turbine plants (GTP) with gas turbine engines (GTE) is considered to be one of the promising directions of increasing the efficiency of fuel consumption in the process of production of mechanical and thermal energy. With current level of gas temperatures, regeneration allows achieving PE at the level of 40–42 %, which, for a simple cycle, corresponds to t3=1300–1400 °C and asguires the use of new systems for cooling turbines and heat resisting materials [3, 5, 12]. Taking the aforementioned into account, a relevant problem is determining such levels of effectiveness and pressure losses that would ensure minimum mass of the regenerator at the asguired PE
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