Sadu V Hydroelectric Power Plant

The Sadu V Power plant was designed with an installed capacity of 2 x 7.7 MW, 6.5 million avnd accumulation m of water, a head of 375 m, installed discharge of 2.5 m3/ s, producing 70 MWh/year.

The construction started in 1949.

On December 31, 1956 when operation started, Sadu V became the second biggest hydroelectric power plant in Romania. For power outlet groups was made ​​permanent and a temporary accumulation crosspieces made ​​to be used for achieving concrete enclosure in which the dam will be good.

Negovanu Dam
n 1959 he began execution Negovanu dam, originally designed site n after project conducted by Prof. Eng. Priscu and endorsed by Prof. Radu. A. Stuky (Switzerland). It is the first concrete arch dam in Romania, executed by Hydropower Construction Company, the future HIDROCONSTRUCTIA SA dam project prectica put in the dam crest in 1158 Negovanu has ocupnd share 5th place in the hierarchy altitude dams in the country.

It is the first concrete arch dam in the country, the center angle of about 110, the crown radius of 78 m, and hight in the master section of 62,00 m sure a storage volume of 6.3 million m3. It consists of 13 plots of varying widths between 6 and 12 m central plots are arranged to discharge and can eject a flow of 280 m / s. Arcs that make up the dam are circular, with constant thickness throughout the length and birth radially oriented. Concrete thickness at the base is 19.00 m, 3.50 m and the canopy was not provided about the traffic on the canopy.

Sealing depth of foundation was not provided by the execution of the now-consolidation injection of 5.00 m throughout ampriza dam to provide a link concrete-rock and a veil on 2 rnduri injection of 30-40 m, all around the dam. On the dam design drainage systems are not executed. in 1992 was made ​​a drainage system downstream of the veil, ETC 3 groups on each side.

Sealing joints between plots in the jars was made ​​15 mm thick copper to parament upstream and jars of galvanized steel of 1 mm the downstream parament. arrester consists of waters discharged by 5 cmpuri central opening is 5.80 m. below the threshold by 40 DECT others to evacuate low flows.

To drain the lake and have provided a purge bottom n slope through a gallery of 150 m with 2.20 x 2.60 m section, with outlet valves flaring and well equipped house 2 1.50 x 2.00 valves flat type drawer, and a hydraulically driven bottom drain in the dam body, plot 7, = 1.000 mm metal pipe equipped with butterfly valve and the valve cone. Maximum discharge of 2 purge NAP bottom is 95 m / s, depending on the share in the lake and the openness of the valve. Because I rock dam downstream was compact, unaltered, there was A system of energy dissipation, executndu is just a slab of reinforced bar of 5.80 m, n immediately downstream of the dam.

Sadu V Power Plant
1955 Central page Sovromconstructia was executed. Equipment over the 1959-63 works were executed under HIDROCONSTRUCTIA entrepreneurship.

The inlet from Lake Negovanu is located at the right bank, two grills massive concrete valve house after it is equipped with 2 flat-operated valves. inlet 5.350 m long, 248 m from the coastal pipeline is a tunnel with reinforced concrete or n = 1.50 1.80 m. The main inlet is brought to share captured Sădurel River at elevation 1199, with a catchment of 6.80 m head Tyrolean weir and which accumulates in the back 500 000 m, water is transferred to n culvert through a gallery of 58 m by 43 m and a well-starring role castle secondary balance.

Surge tank is a well balance with main = 2.50 m and 31.00 m naltimea of, the lower house NTR a gallery of 24 m and the upper house, truncated cone, above the shaft extended to 9.85 m. diameter avnd house equipped with two valves butterfly valves is adjacent mountain of it leaves the anchorage and forced pipe 913 m and = 1.60 1.50 m, the PNA from the dealer.

Sadu Power House is above ground, consisting of engine room, where the actual infrastructure is provided with the following partitions: calming the overflow tank and connected to the channel side of the run, spiral chambers and rising water pumping station.

Superstructure close the engine room, and separate control block is built. Unlike the 1956 original equipment, data changes in 2 units of 7.7 MW Pelton Francis a 12 MW, installed flow is 8.25 m3/s at a head of 398 m and production of 54.40 MWh/year. This performance could not be reached. Following Francis group was dismantled and the remaining features are the box. A channel connecting reach between stilling basin and Sadu River, which had been channeled upstream and downstream of the plant.

Concreting dam started in 1959, made ​​in 1961 and completed according to n work n 1963, with Francis turbine assembly. The main amount of work: excavation 28,000 m, 46,000 m of concrete aggregates and sand transported concasaj to 40 km, 2.000 ml wells.