Энергетическая эффективность ГТП семейства АИ-336 с распылительной системой охлаждения циклового воздуха

Abstract

Распылительная система охлаждения (РСО) циклового воздуха наиболее приемлема для повышения эффективности газотурбинного привода (ГТП) семейства Д-336 и АИ-336 при высоких температурах окружающего воздуха. Определенные преимущества здесь имеют РСО входного воздуха на основе пневматических форсунок. В работе представлены результаты стендовых испытаний ГТП с такой РСО, в том числе на режимах "влажного" сжатия в компрессоре. Определены достижимые значения прироста мощности и эффективного КПД ГТП, влияние защитных сеток комплексного воздухоочистительного устройства на эти показатели, вклад увлажнения воздуха в снижении эмиссии окислов азота.

One of the main drawbacks of any gas turbine drive (GTD) is a decrease in its power and the effective efficiency with an increase in the ambient temperature. The air cooling eliminates to a great extent the above negative consequences. Spraying-type cooling systems (SCS) are considered to be the most promising choice from the available range of cooling systems, especially for the seasonal operation with regard to capital expenditures and operating costs. Pneumatic nozzles have certain advantages for them. An important condition for the realization of the SCS for many gas turbine drives including those of D-336 and AI-336 sets is the absence of any structural changes in their flow part. Therefore, this scientific paper studies the preliminary cycle air cooling system. At the same time "the wet compression" in the compressor is also possible for the drops sprayed prior to entering the gas turbine drive, when the conditions for their full evaporation have not been provided yet. The margins for the appropriate use of such modes of the evaporation cooling and their effect on the efficiency indices of the GTD cannot be defined carrying out no integrated rig tests. The values achieved for the gain in power and effective efficiency of the GTD, the influence of shield grids ofcomplex air scrubber (CAS) on these indices and the contribution of air moistening to a reduction in the emission of nitrogen oxides were defined experimentally. The advantages and the areas for the use of SCS with the full evaporation of drops prior to entering the compressor have been substantiated.