Wyniki wyszukiwania - BazTech

1

Study of the effectiveness of the turbine condenser air extraction system using hydro ejectors

Badur J., Kowalczyk T., Ziółkowski P., Tokarczyk P., Woźniak M.

Transactions of the Institute of Fluid-Flow Machinery

|

2016

|

nr 131

41--53

EN

The aim of the paper is to investigate the effectiveness of the 18K380 steam turbine condenser air extraction system using hydro ejectors. Motivation for the analysis was a need of improvement of the energy conversion ratio of the power plant. To achieve this goal it was necessary to establish efficiency of each subsystem of the energy cycle. The air extraction system is not a highly power consuming system but it has great impact on the steam cycle efficiency by influence on the condensation temperature. The air extraction system effectiveness depends on a weather conditions, exactly on the ambient temperature, which raises the question whether it is worth to modernize the hydro ejectors or replace them by a centrifugal vacuum pumps. To establish the vacuum system effectiveness a new innovative mass flow measuring system has been implemented to measure an air-steam mixture flow and the fraction of the air mass in the mixture. The measuring system is based on a Venturi nozzle supplemented with a temperature drop during the mixture expansion.

2

The analyzis of the stream-air mixture during a flow through a tube bank inside a condenser

Krzyślak P., Joachimiak M.

Transactions of the Institute of Fluid-Flow Machinery

|

2014

|

nr 126

131--140

EN

The paper presents the results of calculations related to the flow analysis of a tube bank taking into account the partial pressures of gases flowing through the condenser. Different mass share of the gas not condensing in the heat exchanger upstream to the first row of tubes and the partial pressures of water vapor and air have been taken into account. The value of the partial pressures of gases, pressures drop, temperature, velocity, Reynolds number, and air share in the subsequent rows of tubes have been calculated. This study is a basis for the analysis of heat exchange in the condenser considering the influence of the noncondensing gas. The increase in the share of air in the following rows of tubes results in an increase in the thermal resistance and condensation of increasingly lower mass of water vapor.

3

The analysis of the changes in the partial pressure of gases and the share of air during a flow through a tube bank inside a condenser

Joachimiak M., Krzyślak P.

Journal of Mechanical and Transport Engineering

|

2013

|

Vol. 65, No. 4

13--21

EN

The paper presents the results of calculations related to the flow analysis of gases in a model tube bank of a condenser. Different mass share of the gas not condensing in the heat exchanger upstream of the first row of tubes and the partial pressures of water vapor and air have been taken into account. The value of the partial pressures of gases, pressure drop, temperature, velocity, Reynolds number, and air share in the subsequent rows of tubes have been calculated. This study is a basis for the analysis of heat exchange in the condenser considering the influence of the non-condensing gas.

PL

W pracy przedstawiono wyniki obliczeń dotyczących analizy przepływowej gazów w modelowym pęczku rurowym skraplacza. Uwzględniono różny udział masowy gazu nieskraplającego się w wymienniku ciepła przed pierwszym rzędem rur oraz ciśnienia składnikowe pary wodnej i powietrza. Obliczono wartości ciśnień składnikowych obu gazów, spadku ciśnienia, temperatury, prędkości, liczby Reynoldsa, udziału powietrza w kolejnych rzędach rur. Praca ta stanowi podstawę do analizy wymiany ciepła w skraplaczu z uwzględnieniem wpływu gazu nieskraplającego się.

4

Badania zależności pH kondensatu wodnego od wartości ciśnienia cząstkowego CO2 i temperatury w warunkach otworopodobnych

Stachowicz A.

Nafta-Gaz

|

2008

|

R. 64, nr 12

877-881

PL

W artykule przedstawiono wyniki badań zmian kwasowości kondensatu wodnego w warunkach otworopodobnych dla zróżnicowanych wartości ciśnienia cząstkowego CO2 oraz różnych wartości temperatury. Badania prowadzono na czystym CO2 oraz na rzeczywistych gazach o różnych zawartościach CO2 pobranych z odwiertów. Testy wykazały istnienie kilku zależności pomiędzy pH kondensatu wodnego a ciśnieniem cząstkowym CO2 w gazie. Uzyskane w testach wartości pH (3,8-4,7) wskazują na co najmniej średnie zagrożenie wyposażenia badanych odwiertów wystąpieniem korozji wywołanej CO2.

EN

The findings of changes in acidity water condensation in simulation to well hole conditions for miscellaneus values of CO2 partial pressure and various values of temperature were submitted in this article. Laboratory tests were made in pure CO2 and real gases with different contents of CO2 which were taken from wells. Explorations showed the existences a few relations between pH of water condensation and partial pressure of CO2 in gas. The values of pH (3,8-4,7) which was received in tests suggests that the risk of corrosion triggered CO2 in equipment wells which have been examined is no less than average.