xiii, A,8 Ycasixmo and Valencia: Producer-gas Plant 123 



the producer. The tests have shown conclusively that mixture 

 of husks and shells can be successfully burned in a suction pro- 

 ducer. The design of a producer in which husks are to be used 

 should provide a volume in proportion to the quantity of husks 

 to be used in the mixture ; the less this amount, the smaller the 

 producer. When shells alone are to be burned, the producer 

 will conform very closely in design to one for lignite. 



Walker ® has shown the average weights of husks and shells 

 from 1,000 seashore and 1,000 inland coconuts to be 800 and 

 286.5 grams, respectively. Based on these figures and on the 

 consumption of 2.85 kilograms of fuel per net kilowatt hour as 

 recorded in test 4, the use of the shells alone from ten nuts 

 to produce 1 kilowatt hour is a very conservative estimate. 

 Therefore a copra plant that uses 10,000 nuts in ten hours' opera- 

 tion will be capable of generating 1,000 kilowatt hours during 

 the same period or 100 kilowatts in one hour. This means that 

 there is a possibility of designing a copra drier that could be 

 either gas or electrically heated, the temperature control of 

 which would be ideal. Besides, there would probably be surplus 

 power for coir or other industries. 



On account of the excessive rise in the price of coal copra cake 

 was tried in order to obtain sufficient data to enable us to 

 compare its value with coal. The ash of copra cake is useful 

 as a fertilizer, and its value for such purpose should be deducted 

 from the cost of copra cake. Tables VII and VIII give, re- 

 spectively, the results of the use of copra cake as fuel and its 

 analysis. 



Table VIII. — Analysis of copra cake.' 



Oil in cake (per cent) 10.86 



Moisture (per cent) 11.00 



Ash (per cent) 4.70 



Potassium oxide (K2O) in ash (per cent) 22.51 



Loss on ignition of ash (per cent) 29.02 



Lower calorific value of copra cake (calories) 3,855 



Higher calorific value (calories) 4,350 



" Analyzed by Messrs. Wells, Pefla, and Arguelles, chemists. Bureau of Science. 



The results of commercial tests of Uling coal mined in Cebu, 

 P. I., are shown in Table IX. 



Table X gives the cost data of the producer-gas plant under 

 discussion. 



'This Journal (1906), 1, 79. 



