Document 6B6KMmq0rbKKLKxojnMJJVMXg

Jacksonville, Florida will use preferred standard turbine * pen* orators with one boiler per turbine arranged on the unit system. Semioufdoor design places 850-psig 900-F boilers, fans outside By HERBERT McCLAMMY Mechan/es/ tnalnocr, otiocfoto o4 Adyaoltft, (mM and WlH of South's Largest Municipal From a BECtnnmc in 1695, when the City of Jacksonville took possession of a new pfaot in Waterworks Park, the electrical eystera of the city has grown to be one of the largest municipally owned utilities in the South. Increasing demand for service rendered the original plant wholly inadequate by 1911. Construction of the Talleyrand Avenue Station was initiated and com* pleted at a cost of about $635,000. When this plant started operating on OcL 12, 1912, the Waterworks Park plant was converted to a substation. The Initial Talleyrand Avenue Sta tion consisted of two 1500-kw general* ing units supplying power at 6,6 kv. Subsequent Installations were: two 1500-kw units and one 4000kw unit No. 4 in 1918; raising station capacity to 10,000 kw. The Utter unit, tllll In place, has sometimes eided hi carrying the peak load. The four 1500-kw sets bare been dis placed by these units: No. 1, 10,000 kw on Mar 14, 1921; No. 5, 12,500 kw on Sept 24, 1924; No. 6. 25,000 kw on Jan 2, 1928; No. 7, 30,000 kw on Mar 7. 1939, bringing station capacity to Its present 81,500 kw. Station voltage was changed from 6.6 to 13.2 kv with the installation of No. 1 unit. .Increasing service demand and war time construction restrictions acceler ated equipment depreciation. Lack of labor was reflected in the serviceability of equipment; in 1945 No. 4 was no longer considered safe for operation end has not been used since. Flwilag Power Plant. It became nec essary to lease from the federal gov ernment one of the four 30,000-kw float ing power plants, the "Inductance," built for just such emergency serv ice. This plant raised system generat ing capacity available for service to 107,500 kw and the net assured capac ity (largest unit out o( service) to 77,* 500 kw. Thus the city avoided the possibility of rationing power to certain industries. After on appreciable rental had been paid (or the floating plant tor about a year, the commissioner of utilities, Ceorge A Pierce, Instituted negotia tions ending in Its purchase by Jack sonville in 1946. This resulted In an increase in the city's over-oil revenue. Graph on page 90 shows the system load growth from 1931 to date, and ex pected future -expansion together with proposed capacity additions. The city has long contemplated utility additions to promote further development of Jacksonville and the surrounding terri* lory, page 89, industrially and rwidenUally. In 1947, >15,000,000 in Electric Revenue Certificates were issued to fi* nonce the construction of 60,000*kw additional generating equipment, substations, underground and overhead distribution, and the modernisation of existing equipment. Hew Generating Plant. In South Jacksonville on Ibe St John's south bank, p 89, the new plant will be signed for base-load service 60,000 kw at 13.8 kv leas losses to., outside substation. Each turbine be supplied by its own boiler ai on the unit system. There will be emergency interconnection ben boilen, any feedwater pump of Ota units can serve either boiler. The 000-kw 85%-pf Westinghoute torbl generators will be built according' the preferred standards procnul by A1EE and ASME. Provisions will be made for the lure addition of two 30,000-kw Should conditions warrant, these could be 40,000 kw each installed the same apace. The two oil-fired boilers will kits continuous rating of 300,000 lb per each at 850 psig, 900 F. Each uait have waterwalla, superheater, heater, supetheat control, steam fier, soot blowers, combination oil gas burners and steel* casings far door protection. ^ F.sl Handling. Thr 62,000-tM 0? storage tanks wiU realise eavtop fuel cost by bulk purchase of coP^ tanker loads at one lime. Foil uaP will supply fuel for over 30 d*T< *j, P,normal operation. If plant espsriy eventually doubled only one sddWoaUj tank need be built. A concrete slab over a substfuri^, supports each tonk. An earthed surrounding each tank will held contents io case of leakage. Ae l (28| POWER Mr from the river and discharge into In dividual cast-iron eonduits connecting to the condenser inlets. These pumps will be installed on a concrete intake structure with a gantry frame serving the four pump wells. Each pump well operating, cleaning and maintenance purposes with a bai-griU trash rack, sluice gate with frame and operating mechanism, and a traveling screen with backwash pump and jets. The four caat*lroo conduits from