Studying the mutual interaction of hydraulic characteristics of waterdistributing pipelines and their spraying devices in the coolers at energy units
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2019, Vol 3, Issue 8
Abstract
<p>This analytical study is based on the results from hydraulic tests of spray nozzles for the mixing (waterjet) steam condenser at a thermal power plant's turbo generator. The work was performed at the stage of launch operations at TPP. Such hydraulic tests were carried out by co-authors at the stage of launch operations at Razdan TPP (Armenia). The TPP is located in a mountainous region with a limited water supply; the plant's features include: dry cooling of circulating water in the radiator cooling towers; a steam condenser of mixing type.</p><p>The main tasks of hydraulic tests were: to determine the actual throughput capacity, to find a flow rate coefficient for the nozzles of a steam condenser, as well as analyze their operation in a vacuum in the condenser.</p><p>This study considered the nozzles that have two openings with a diameter of 13 mm and 15 mm for spraying cooling water within the steam space of the condenser.</p><p>By exploring the hydraulic characteristics Q=f(H) of standard nozzles mounted at the end of a water-distributing pipeline, it was found that the diameter of the nozzle opening did not significantly affect the flow rate of water under the same water heads. Such a result is explained by that the pipeline's characteristic was obtained, rather than that of the spraying device.</p><p>The further hydraulic study into the nozzles was performed at a special laboratory bench.</p><p>The established factor of interrelation between the hydraulic characteristics of a water-distributing pipeline and the nozzles mounted onto it is important for performing similar studies.</p><p>The throughput capacity of the nozzles, considering the presence of a vacuum in the steam condenser of a turbo generator will be larger than that under atmospheric conditions. However, in a closed system of water circulation, the overall water flow rate of nozzles will equal the supply of cooling water from pumps into a given system. Therefore, the supply of cooling water to a condenser will not change dramatically, while the water flow rate of a single nozzle will be inversely proportional to their number.</p><p>In addition, we investigated a possibility to increase the feed of water to a condenser in order to improve energy performance. Our analysis reveals the impossibility of a substantial increase in the water supply to a condenser by increasing the diameters of spraying nozzles' openings. This does not substantially reduce the overall loss of water head and feed from circulating pumps to the steam cooling system in a turbine's condenser.</p>
Authors and Affiliations
Nikolai Bosak, Volodymyr Cherniuk, Ivan Matlai, Iryna Bihun
Keywords
Related Articles
- EP ID EP666448
- DOI 10.15587/1729-4061.2019.166309
- Views 29
- Downloads 0
Forming the structure of whipped desserts when introducing the food additive "Magnetofood" to their formulation
<p>The food additive "Magnetofood", in the form of a nanopowder with particles the size of (70‒80) nm, has been designed and proposed as an improver for the structure of whipped desserts. "Magnetofood" can both independe...
Estimation of durability of carrier shafts in eccentric mechanisms
<p>This paper has suggested a procedure to analyze durability of supporting shafts in eccentric mechanisms based on finite-element modeling. When conducting the analysis, the steady movement of the mechanism is investiga...
Intensification of the process of metallizing tungstencontaining ore raw materials by the powder metallurgy method
<p>X-ray diffraction phase analysis of samples performed on a DRON-6 diffractometer has shown that the processes of CaWO<sub>4</sub> transition to WC and W<sub>2</sub>C had the highest probability in the temperature rang...
Synthesis and technical realization of control systems with discrete fractional integral-differentiating controllers
<p>Control systems with a fractional order which provide better dynamic and static indicators for many technical objects in comparison with systems with integer order of astaticism were studied. Based on the analysis of...
Development of fatigue test technology of sheet automobile materials
<p>Ensuring the operability of the cars’ parts and components is one of the most topical problems in the modern automotive industry. Most of the car parts are under cyclic loads leading to materials’ destruction. Therefo...