Ill 



The fuel consumption of a steam engine will vary greatly on the type 

 of boiler and engine. A small slide valve non-condensing engine under 25 

 horse power will use probably 5'0 to 60 pounds of steam per brake horse 

 power per hour. A locomotive type of boiler should give 5 or 6 pounds of 

 steam for 1 pound of coal. Therefore, a small steam engine under 25 

 horse power should consume about 10 pounds of coal per brake horse power 

 per hour. Steam engines of the same type from 30 to 50 horse power will 

 consume from 5 to 8 pounds of coal per brake horse power per hour. 



Electrical energy is measured in Kilowatts. A Kilowatt is equal to 1 1-3 

 horse power, but because of the loss of energy in the motor, 1 Kilowatt 

 will usually give about 1.1 brake horse power. Based on this figure 1 

 brake horse power hour is equal to 9-10 of a Kilowatt hour. 



The above values show that to produce 1 brake horse power per hour, 

 it requires either 1-7 of an Imperial gallon of distillate, about 10 pounds 

 of coal, or 9-10 of a Kilowatt hour. Based on these figures the table below 

 shows the cost of fuel per brake horse power per hour for several equiva- 

 lent cost values of fuel. In the table is also given the fuel cost of pumping 

 one acre foot of water through a lift of one foot, assuming plant efficiency 

 of 50 per cent, and 75 per cent. 



The price of engine gasoline bought in drums is about 24 cents per 

 gallon delivered at Kamloops and 26 cents per gallon at Okanagan points. 

 These prices are equivalent to coal at $6.85 to $7.40 a ton or electricity at 

 3.80 to 4.15 cents a Kilowatt hour. The fuel cost is, however, only a part 

 of the total cost of pumping. 



6. Fixed Charges and Attendance. 

 A. Fixed charges. 



The cost of installation represents a capital which if invested would 

 bring in an income represented by the interest. It is therefore necessary 

 to consider this interest as part of the cost of operation. To this should be 

 added the annual cost of repairs, maintenance and renewal. These items 

 of cost represent the fixed charges. After 6 or 8 years a gasoline engine 

 may need to have its cylinder rebored and a new piston provided, the cost 

 of which is about one-fourth the cost of a new engine. With ordinary care 

 the life of a gasoline engine may be taken as 10 years; the life of an 

 electric motor about 15 to 20 years. The fixed charges on the entire plant 

 may be taken as follows: 



