Weekly Arizona journal-miner., 1906-09-05
Reports of Competent Electrical Ens;;re.rs Show That City Can Produce L;ebt At About 3 Cents. or One-F;ftb Lea. Than Current Rates.

The following IS the first repor, of Superintendent Glass:
 First Report
 Prescott. Arizona, July 7th. 1906. Morris Goldwater, Mayor.
 City of Prescott, Arizona.
 Dear Sir; The following is my rcpor, covering the cost of installing and operating municipal electric light. ing department, if installed in con. neetion with our municipal water sys. viee. the additional cost of delivering electrical current for city lighting or to commercial customers in Prescott. will be as follows:
 The guaranteed evaporation of water by the boilers from 9l9 deg. F. into steam at 200 pounds pressure. carving loo dcg r. superheat. will be 1i pounds, net per pound of 20 gravity crude oil consumed in the boiler fur. mace. which is to say. that it wilr be i4 pounds above the steam necessary to operate the oil burners. While the en. zine has n guaranteed efficiency of 12 pounds of steam per i.h.p.h. delivered ny the cylinder to the piston. the me chanical efficiency of the engine will bc 9l per cent. thereby consuming l3.32 pounds of steam per b.h.p.h. de- livcred to the dynamo belt; while the | belt dynamo cxciter and transformer efficiency in every day practice will be s+ per cent thereby consuming in the engine cylinders i5.+32 pounds of steam per electric h.p.b. delivered.
 To this consumption there must he added the steam necessary to operate the condenser. boiler feed and oil pumps, along with pipe, receiver, and cylinder. radiation and conformation which my experience has taught me will bc approximately three pounds peI electric b.p.h.. thereby bringing tho total evaporation of water in the boiler necessary for each electrical hp.h. de livered to the transmission line. IS. +32 pounds.
 The transmission and local distribut ing system will have an efficiency o' s5 per cent, thereby requiring tha 2l.06 pounds of water be evaporated fo each electrical b.p.b. delivered in Pres eott. and io reduce this amount to clec trical units called kilowatt hours. Wi
 must multiply the 2l.o6 by 1883. whicl is practically 2s pounds. oil costs l.aI per barrel of i2 gallons, weighing pounds per gallon. or 3.7j mills pc pound. and for . pounds consumed | 7.5 mills.
 On this basis the additional fue costs. if operating 2,ooo C. P. ar lamps, will be as follows; Consumption of current, 10 smpere at loo volt equal 1000 Watts or XIV. hour per 2,0o0 e.T lamp hour. equal to lamp hour '. mills for oil, average yearly run hours per night, eqnal 7.5c.. and for 3 nights per month. equal to s2.e5. { which must be added cartoons costin ic per nights run or 30c, also glob , brcakagc and lamp attendance whic should not exceed under our condition sI DO per lamp per month. making , total operating cost of s3.55 per montl The additional costs of deliverin , current for incandescent lighting . customers will be as follows: Per XIV bonr delivered 7.5 mills, to whie must be added additional salaries du , to the operation, which will be $?OO pc month (which will on the assumed d' livery of Is.750 K. W. hours, which sc will bring in gross income q . sI.50O per monih). will bc s1.o6 pc K.W.H.D.. making the total si.si p' K. w. II. delivered. To this | wou' recommend adding 10 per cent to cove . unforeseen expense. making the tot' sI.99Ic or practically 2c per XVII On the above delivery the additions expense will therefore he $375 again' our income of q LOO. leaving balan' of sI.Ie5 per month, which will pa more than one half interest on o' bonded debt. The cost of insta'''n inc additional equipment will be , follows: , Six arc lights on plaza, with me Granite creek station. $2.5oO,
 Cost of local distribution of 'nca' . descent capacity for the eight o''e' surro.,nding tho plaza, complete VI" service taps. transformers, register a" I regulating instruments will he l" [" lowH .llt '...t. n.t ..
 For block No. I3 ..5..f.ri,' ;sI'''