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ISSN Online: 2379-1748

ISBN Flash Drive: 978-1-56700-472-4

ISBN Online: 978-1-56700-471-7

3rd Thermal and Fluids Engineering Conference (TFEC)
March, 4–7, 2018, Fort Lauderdale, FL, USA

TECHNOECONOMIC STUDY OF WASTE HEAT RECOVERY STRATEGIES FOR NATURAL GAS COMBINED CYCLE POWER PLANTS

Get access (open in a dialog) pages 1803-1806
DOI: 10.1615/TFEC2018.tcn.021619

摘要

Increasing ambient temperature negatively impacts the performance of natural gas combined cycle (NGCC) power plants, and there have been multiple approaches to mitigate this. In the present study, the techno-economic performance of electrically driven inlet chilling combined with an NGCC power plant is compared to three different thermally activated cooling strategies: gas turbine exhaust, steam, and flue gas driven absorption systems. A simplified thermodynamic and heat transfer model was coupled to a cost model developed by DOE NETL to predict the performance and levelized cost of electricity (LCOE) of a NGCC power plant at varying ambient conditions for all of these approaches. The results show that electrically inlet driven chilling produces the lowest LCOE if the capital installation costs are below a particular threshold, but it is dependent on the location and cooling load of the absorption system. In Los Angeles, if the cost of the vapor compression system exceeds $200 per kWth, then a flue gas driven absorption system with a maximum cooling load of 4.33 MWth will result in a lower LCOE if it can be made at the same cost. Conversely, both steam driven and flue gas driven absorption systems at a similar cooling load will result in a lower LCOE in Houston if the capital costs are similar to the vapor compression system. However, if the cooling load is increased to ~30 MWth, then the LCOE for all methods increases sharply and is approximately the same for all methods if the costs of systems exceeds $2000 per kWth.