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NEW POWER SCHEME.

NORTH TARANAKI PROPOSAL. MOKAU COAL PROJECT. The report regarding the scheme for utilising Mokau coal to provide power for Taranaki was before the Clifton County Council on Friday. The* report dealt with a plant of an initial installation of 13,000 h.p. and an ultimate capacity of 26,000 h.p., and stated that the power house site, comprising 30 acres of practically level country with, an elevation of nine feet above high water mark, was situated 14 miles from Mokau River mouth, on the north bank and in the Waitomo County block, known as Manga-Awakino No. 1 A. The contour of the ground is easy and has natural facilities -for a gravitation water supply. river is navigable up to this point, for steamers of 150 tons d.w. BUILDINGS AND MACHINERY. The power house would be a re-in-forced concrete structure, consisting of a boiler house, turbine room, and higli tension room. The boiler house would have six water tube jboilers, each evaporating 30,000 lbs per hour at 200 lbs pressure with. 250 degrees superheat, fitted with chain grate stokers, economisers, induced draft with overhead bunkers and coal and ash conveyers, boiler feed pumps and water softening plant. In the turbine and generating room would be two 5,000 k.w. Turbo-Alter-nators complete with one condenser common to both, generating 3 phase current at 50 cycles at a pressure of 6,600 volts, one exciter reciprocating set of .300 k.w. capacity, one exciter set comprising a synchronous motor coupled to D.C. generator 300 k.w., one 500 amp. houV battery.

The high tension room would be fitted with A.C. switchboard, electrical remote control with a simple system of relay protection; D.'C. switchboard with Tirrill regulator for control of exciter sets and battery, resistance coils between generators and oil switches; cejular concrete cubicles for oil switches, instrument transformers and isolating links; oiip bank of step-up transformers, single phase units 6,G00 to 50,000 volts, 10,000 k.v,a. capacity, electric lightning arrestors. ROUTE OF TRANSMISSION. The construction would make provision for a transmission line voltage of 50 000, and pending a complete survey the route considered the best available was one leaving the power house and traversing N.W.N. across the watershed to a point on the Awakino Valley Road proceeding west to Awakino township, thence adjacent to the Main Road S.S." . through Mokau village, crossing the Mokau River and following the Mokau and Tongapurutu Road to the last named township, thence to Pukearuhe, Uruti, Urenui, and Waitara, where it is proposed to erect the main sub-stat ion. Tower construction with suspension insulators is considered advisable and necessary in negotiating this class of country, and where a single line only is contemplated it is maintained that no other class of line work is admissable. Solid h.d. copper of suitable cross-sec-tion would be adopted and an effort would be made to avoid any substation taps between the power house and Waitara. MATERIALS AT HAND. On the power house site is a timber ■’mill with a cutting capacity of 10,000 super feet per day, whilst there is an abundance of rata amongst other siiitable timber available for building and line construction work. Clean river shingle is obtainable in quantity for foundation and power house requirements inside the bar and quite accessible, and these, added to a deep water frontage arc of considerable importance, tending towards cheapening the cost of construction and' expediting the work generally.

In’ the original lay-out provision is being made for the construction of a canal from the river with a maximum depth of eight feet running parallel with the boiler house to a point adjacent to the conveyors! This would also serve for the supply of circulating water to the condensers. Whilst keeping the cost within reasonable limits full use of the natural facilities available are being made. The coal on the block adjacent to the power house, mined and delivered to the bunkers by modern methods, should not exceed six shillings per ton. The coal is of excellent quality and at ordinary rates of combustion* is particularly free from clinker formation. The report said in conclusion: —“The completed scheme should show a uniform and clear layout and supply the necessary power to' a district whose geographical situation, added to the absence of a suitable supply, calls for an alternative such as is the subject of this report.” In a covering letter Mr. Wilkinson said that Mr. J. A. Pigott, the electrical engineer to the Waitara Borough Council, was with him directly responsible for the details of the -scheme which had been presented, and was qualified to advise the Council on any matter relative to the proposal. The writer suggested that the proposal made possible the utilisation of a very valuable commodity in the coal which is at present lying idle.

Permanent link to this item
Hononga pūmau ki tēnei tūemi

https://paperspast.natlib.govt.nz/newspapers/TDN19211205.2.5

Bibliographic details
Ngā taipitopito pukapuka

Taranaki Daily News, 5 December 1921, Page 2

Word count
Tapeke kupu
793

NEW POWER SCHEME. Taranaki Daily News, 5 December 1921, Page 2

NEW POWER SCHEME. Taranaki Daily News, 5 December 1921, Page 2

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