Enhanced Condenser Tubes in a Nuclear Power Plant for Heat Rate Improvement

摘要

Analysis was performed to determine the performance and economic benefits of using enhanced condenser tubes in an existing nuclear plant. This work consisted of using measured heat transfer and friction performance of two enhanced tube geometries to calculate the resulting reduction of condenser saturation temperature. Using the known plant heat rate and heat rate correction factor, we calculated the increased plant generation capacity, relative to the plain tube condenser design. Detailed analysis was done for the WielandNW-16 and the Wolverine Korodense-LPD tubes, which are estimated to cost about 23% more than plain tubes. Simple payback analysis of the Wieland NW-16 "new tube bundle" tube shows that the annual average heat rate is reduced 3.83% and the increased tube cost can be recovered in 0.036 years based on the increased generation capacity valued at %2000/kW. Tube-for-tube replacement provides a payback of 0.054 years. For the month of July, the heat rate (with new bundle) is reduced 3.83% and the increased generation rate is 37 MW. Further detail is given on accelerated paniculate fouling testing, which shows that the tubes are cleanable with the sponge-ball cleaning system.