热能动力工程——信息动态专栏

To reduce the effect of global warming on our climate,the levels of CO2emissions should be reduced.One wayto do this is to increase the efficiency of electricity production from fossil fuels.This will in turn reduce the amountof CO2emissions for a given power output.Using US practice

To reduce the effect of global warming on our climate, the levels of CO2 emissions should be reduced. One way to do this is to increase the efficiency of electricity production from fossil fuels. This will in turn reduce the amount of CO2 emissions for a given power output. Using US practice for efficiency calculations, then a move from a typical US plant running at 37% efficiency to a 760℃/38.5 MPa （ 1400°F/5580 psi） plant running at 48% efficiency would reduce CO2 emissions by 170 kg/（MW . h） or 25%. This report presents a literature review and roadmap for the materials development required to produce a 760℃（ 1 400°F ） / 38.5 MPa （5580 psi） steam turbine without use of cooling steam to reduce the material temperature, as well as results from trials on the nano-strengthened austenitic alloy CF8C ＋. The report reviews the materials solutions available for operation in components exposed to temperatures in the range of 600 to 760℃ ,i. e. above the current range of operating conditions for today＇ s turbines. A roadmap of the timescale and approximate cost for carrying out the required development is also included.