ISSN Online: 2688-7231
ISBN Online: 978-1-56700-478-6
Proceedings of the 24th National and 2nd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2017)
Simulation and Optimization of Thermal Systems in Coal based Power Plant Cycles
摘要
Simulations are extensively used in various thermal systems particularly in power plant industries to evaluate the output responses. The choice of optimal simulation parameters can lead to improve operation and time, but configuring them to produce maximum power output is a challenging problem. In power plants, there are so many parameters affects the performance of plant and need optimization. In this process Cycle Tempo 5.0 simulation software was used for optimization of critical steam extraction pressure parameters. The objective of the paper is to analyze Quasi-Newton optimization method for steady state optimum steam extraction pressures from high pressure and low
pressure steam turbines that would offer the maximum thermal
efficiency of a plant cycle. Eight stages of regenerative feed
water heater arrangement with single reheater are considered
for the analysis. The reheat temperature is 538 °C and heat input value of anthracite coal is kept at 28,938 KJ/Kg as
constant in the simulation. The work has been carried for a
subcritical, supercritical and ultra-supercritical coal based
thermal power plant cycle by considering the same plant
configuration. The energy absorbed by the steam generator is
compared at different main steam inlet temperatures to
turbine at 500, 600 and 700 °C for three power plant cycles. From the simulation study, it is observed that the specific coal consumption, steam consumption, auxiliary power
consumption and heat transfer area in steam condenser
reduces when higher steam input parameters are applied to
the coal fired power plants. It was also compared the exergy
efficiency of thermal systems both in theoretical and practical
aspects point of view.