期刊名称：Lecture Notes in Engineering and Computer Science
印刷版ISSN：2078-0958
电子版ISSN：2078-0966
出版年度：2018
卷号：2237&2238
页码：697-701
出版社：Newswood and International Association of Engineers
摘要：Khan Khwar Hydropower Plant has an installed
capacity of 72 MW. It started its commercial operation in
November 2010, since then it has added 948.528 MWh of
electricity to the national grid (as of 30th September 2017). This
national asset is facing numerous unnecessary forced shutdowns
due to its cooling water system. Currently installed cooling
system is once through open loop cooling water system which
pumps the water from tailrace, the water in the tailrace causes
the problem of clogging due to sediments inside the cooling
tubes responsible for the exchanging heat, it also damages
pumps by choking them and may contaminate the lubricating
oil because of the puncturing of the cooling coils in turn
damaging the bearings. The clogs, sludge or fouling contains ion
ferrite is believed to originates from the tailrace. This results
in unforeseen plant shutdown. Due to above reasons plant
management has given this case study for considering switching
from once through open loop cooling water system to closed
loop cooling water system. Closed loop cooling water system
with tubular heat exchanger is considered. During the designing
of the heat exchanger Log Mean Temperature Difference LMTD
method is used. The scope of this paper is limited to the theories
of thermodynamics.
关键词：Khan Khwar Hydro Power project (kkhpp) in
Pakistan; Cooling Water system; LMTD (log mean temperature
difference); Nusselt number (Nu); Prandtl number (Pr); Reynold
number (Re)
