Spray Ejector Condenser for Negative‐CO2‐emission gas power plant: dimensioning and initial test results

Abstract

Spray Ejector Condenser (SEC) is a device for condensing of water vapour at the outlet of gas‐steam turbine, as well as compressing and separating CO2 from the mixture. Efficient thermal, mechanical and chemical separation of CO2 from steam is required in order to effectively recover CO2 for further CCS processing. A dedicated 1D mathematical model was applied for preliminary SEC dimensioning, resulting with two geometry variants: one for low‐pressure lift and low water consumption (LPL), and another for high pressure lift at increased water consumption (HPL). Initial results of experimental tests for the LPL geometry indicate efficient thermal performance (max. condensing efficiency registered equal to 81% vs. 82% projected) at somehow compromised mechanical performance (max. pressure lift registered equal to 0.08 bar vs. 0.23 bar projected), truly due to irreversibilities in zones of intensive water recirculation in the mixing part of SEC.

Spray Ejector Condenser for Negative‐CO2‐emission gas power plant: dimensioning and initial test results