Time filter

Source Type

This paper presents a gas turbine combined cycle unit with oxy-combustion. Oxy-combustion is one of the currently developed carbon capture and storage technologies (CCS). Firstly a gas turbine part of the unit is shown and the operating parameters are selected. The focus was on the impact of the compression ratio on the unit's efficiency. In the following section the steam parts in 3 units with different heat recovery steam generator (HRSG) construction were optimized. The single-pressure HRSG (1P), double-pressure HRSG with reheating (2PR), and triple-pressure HRSG with reheating (3PR). Optimization was performed by the means of genetic algorithm presented in this paper. The optimization results and achieved characteristic parameters of analyzed units are presented and compared.

The supercritical power plant analyzed in this paper, contains the following elements: steam turbine, hard coal fired oxy-type pulverized fuel boiler, carbon dioxide capture unit, air separation unit with: four-end type high-temperature membrane and gas turbine unit. Gross electric power of the power plant is equal to 600 MW. The live steam thermodynamic parameters are 650 °C/30 MPa and the reheated steam parameters are 670 °C/6 MPa. Under the assumption of constant gross power of the analyzed power plant among others, a thermal boiler efficiency, a gross efficiency of the power plant and auxiliary powers of mentioned above installations were designated as a function of inlet gas turbine temperature and air compressor pressure ratio for assumed oxygen recovery rate in high temperature membrane. With the knowledge of these quantities, a net efficiency of the power plant for two oxygen recovery rates were determined. Due to this efficiency the optimal air compression ratios were determined.

Remiorz L.,Zakladu Miernictwa i Automatyki Procesow | Brzeczek M.,Zakladu Miernictwa i Automatyki Procesow
Rynek Energii | Year: 2013

In this paper a thermodynamic analysis of a gas turbine class G with temperature of exhaust gas to the expander of 1500°C, compression ratio 23, which uses air film cooling in an open-loop was conducted. The analyzed gas turbine has been integrated with three steam cycle models: single pressure (1P), dual pressure with interstage steam reheat, triple pressure with interstage steam reheat (3PR). Models of combined cycle power plants (CCPP) were built in the GateCycle™. In the following section of the paper steam cycles were integrated with CO2 capture installation through the use of steam bleed for regeneration of sorbent in absorber -striper system. The captured carbon dioxide has been compressed to the pressure of 15 MPa to prepare for transport. Comparison of net electrical power and efficiency of the combined cycle power plants with and without CO2 capture and compression installation.

On the work one discussed results of selected research of experimental polymer membranes. And particularly one represented characteristics of the separation CO2 of polymer membranes with the use of gas- mixtures and combustion gas synthetic. Furthermore in the article one represented the construction of the stand and his fundamental rule. The aim conducted research was verification of abilities of the module and qualification of possibility of use it to separation of the CO2 from synthetic-combustion gases and marking of requisite performance characteristics which can be used in the range of numeric research of simulatory energy-systems. Research one conducted by stages. The membranous module was supplied with gas-mixtures to investigate the influence of pressure changes on-the-job of the module at the constant value of the flowfeed. Next one checked what influence on the work of a membrane will cause the variable flow-feed, at the behavior of constant pressure of feed of the module. Then one investigated, which one influence on parameters of the separation CO2 has the change of concentrations of components gas-mixtures. In research one used three gas-mixtures about compositions: (20% CO2/80% N2), (50% CO2/50% N2), (15% CO2/15O2/70% N2). Tests were conducted to keep the constant temperature of gases.

Loading Zakladu Miernictwa i Automatyki Procesow collaborators
Loading Zakladu Miernictwa i Automatyki Procesow collaborators