The Project Gutenberg EBook of Manufacturing Cost Data on Artificial Ice, by Otto Luhr and Herman Friedl This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online at www.gutenberg.net Title: Manufacturing Cost Data on Artificial Ice Author: Otto Luhr Herman Friedl Release Date: July 11, 2009 [EBook #29375] Language: English Character set encoding: ASCII *** START OF THIS PROJECT GUTENBERG EBOOK MFG. COST DATA--ARTIFICIAL ICE *** Produced by Don Kostuch Manufacturing Cost Data ON Artificial Ice MADE IN ACCORDANCE WITH OTTO LUHR CONSULTING ENGINEER & HERMAN FRIEDL ARCHITECT ICE MAKING SYSTEM PATENT APPLIED FOR 154 WEST RANDOLPH STREET CHICAGO, ILL. Ice for Commercial Purposes Ice for commercial purposes is obtained in two ways: either by cutting during the winter time from our lakes and rivers and storing in large Ice Storage Houses located alongside, or by freezing pure clean water by means of artificial refrigeration. All authorities are agreed that artificial ice is more sanitary than natural ice and it is only a matter of time when the use of natural ice will be prohibited except in special cases when the purity of its source of supply is beyond doubt. Our improved method of making artificial ice will cut the labor cost down to the minimum and will enable the manufacturer to profitably sell artificial ice at the price natural ice can be harvested. The logical result thereof will be the building of a large number of modern ice plants all over the country to supply the market with artificial ice in place of the present natural ice. We do not claim any wonders for our system but believe that the following points of advantage will convince any practical ice manufacturer that the labor cost has been cut in two. First. We pull a complete row of the full width of tank at one time. Second. Our air supply is permanently connected to the cans and the supply to each can can be regulated, if required. Third. We have a continuous air supply to the cans during freezing as well as during thawing, dumping and filling. Our air supply never ceases. Fourth. Our air is automatically cooled down to the temperature of the brine in the tank thereby eliminating all possibility of moisture in the air pipes. Fifth. Our cans are held in a solid frame of steel work and are connected to the crane from the time the cans are pulled until they are put back into the tanks, thereby doubling the life of the cans. We give herewith data covering the cost of manufacturing ice and will guarantee that under reasonably fair management the number of men required will not be exceeded. Do not fail to carefully analyze the following cost data. They may seem extremely low but a thorough study of our system will prove them to be very conservative. [1] NUMBER ONE Manufacturing Costs Per Ton of Ice Using Electric Power at Present Chicago Rates for Power and Labor Capacity of plant, 240 tons of ice per day, using 2692 cans of 400-lb. capacity. 18000-ton storage house. Average current requirement for freezing one ton of ice, including storage cooling and all auxiliaries, 55 K. W. hours. Average cost per K. W. hour, .9 cent. Current cost per ton of ice, 55 x .9, equals 49.6 cents. Assuming one month's shut-down for inspection and repairs, the total output of 240 tons of ice for 333 days amounts to 79,920 tons, or roughly speaking 80,000 tons of ice. Adding 1/2 cent per ton of ice for the required heating, the total power cost of making 80,000 tons of ice is (80,000 x .50) $ 40,000.00 ENGINE ROOM LABOR COST: 1 chief engineer per day $ 10.00 3 engineers per day $ 8.00 Total per day $ 34.00 365 days at $34.00 equals $ 12,410.00 or 12410 / 80000 = 15.62 cents per ton [2] ICE PLANT LABOR COST: 3 men pulling ice and setting it up in store-room. per day $ 6.00 3 men in store-room per day $ 6.00 1 shipping clerk per day $ 8.00 Total labor per day $ 44.00 365 days at $44.00 equals 16,060.00 For filling the winter storage house and taking the ice out of it will require 3 additional men for five months, equals 150 days x $18.00, equals $ 2,700.00 Total Ice Plant Labor Cost Equals $18,760.00 or 18670 / 80000 = 23.46 cents per ton 240 tons of ice equal 1200---400-lb. cans. As 24 cans are pulled at one time it requires 1200 / 24 = 50 pulls per day, or one pull every 29 minutes. The ice-puller has therefore ample time to set up all ice pulled in storage house as directed. Cost of Ammonia at 2 cent per ton $ 1,600.00 Cost of Oil and Waste at 2 cent per ton $ 1,600.00 Cost of Water at 3 cent per ton $ 2,400.00 Cost of Salt at 72 cent per ton $ 400.00 Plant Maintenance and Repairs $ 3,500.00 or 3500 / 80000 = 4.37 cent per ton OFFICE EXPENSES: 1 Manager and Salesman, per year $ 5,000.00 1 Bookkeeper, per year $ 2,400.00 Stationery, Telephone, etc $ 600.00 Total Cost $ 8,000.00 or 8000 / 80000 = 10 cent per ton [3] OVERHEAD CHARGES: 8 per cent interest on $350,000.00 investment $ 28,000.00 8 per cent interest on value of land ($20,000.00) $ 1,600.00 8 per cent interest on $10,000.00 working capital $ 800.00 3 per cent depreciation on $350,000.00 $ 10,500.00 Insurance (estimated) $ 1,500.00 Taxes (estimated) $ 3,500.00 Total $ 45,900.00 or 45900 / 80000 = 57.375 cent per ton Total Expense $134,570.00 or 134570 / 80000 = $1.68.215 per ton Divided as follows:-- Manufacturing cost including office expense $ 1.10.840 Overhead charges $ 0.57.375 ICE SALES ASSUMPTIONS: Month Ice Ice sold Ice stored Ice Sold Total Ice produced direct per day from storage stored in 30 per day per day daily days January 240 65 175 5250 February 240 65 175 5250 March 240 115 125 3750 April 240 165 75 2250 May 240 300 60 June 240 400 160 July 240 400 160 August 240 400 160 September 240 350 110 October 240 200 40 1200 November 240 140 100 3000 December None 65 65 Tons 20700 Less Tons 1950 Total Tons 18750 During the month of December, the Ice Plant will be shut down for overhauling and repairs, and part of the ice stored during November will be sold in December, therefore, requiring a total storage capacity of 18,750 tons, of which 750 tons will be stored in the ante-room and 18,000 tons will be stored in the big winter storage. [4] NUMBER TWO Manufacturing Costs Per Ton of Ice Using Electric Power at Present Chicago Rates for Power and Labor 240 TON CAPACITY PER DAY No Storage House for Surplus Ice ICE SALES ASSUMPTIONS: Tons per day Total Tons January 65 1,950 February 65 1,950 March 115 3,450 April 165 4,950 May 240 7,200 June 240 7,200 July 240 7,200 August 240 7,200 September. 240 7,200 October 200 6,000 November 140 4,200 December 65 1,950 Total output tons 60,450 NOTE--These sales can only be realized if the dealer has at least 18,000 tons of natural ice on hand to enable him to take care of the family trade during the hot months. If no large supply of natural ice is on hand hardly 50,000 tons can be sold, thereby increasing the cost per ton considerably. POWER COST: Due to numerous starting and stopping of compressor during the slack months the maximeter charges will be higher and therefore it must be assumed that 60 K. W. hours will be required per ton of ice instead of 55 K. W. hours for continuous consumption. 60 K. W. hours per ton of ice at .9 cent per K. W. hour equals 54 cents per ton. Adding 1/2 cent per ton for the required heating the power cost for making 60,450 tons of ice equals 60,450 x 54.5 cents, equals $ 32,945.25 [ 5 ] ENGINE ROOM LABOR COST: 1 chief engineer per day $ 10.00 3 engineers per day $ 8.00 Total per day $ 34.00 365 days at $34.00 equals $ 12,410.00 or 12410 / 60450 = 20.54 cent per ton of ice ICE PLANT LABOR COST: (Using present method of pulling ice) May, June, July, August, September and October require: 6 ice pullers per day $ 6.00 3 air men per day $ 6.00 6 storage house men per day $ 6.00 Total per day $ 90.00 184 days at $90.00 equals $ 16,560.00 March, April and November require: 6 pullers per day $ 6.00 4 storage house men per day $ 6.00 Total per day $ 60.00 91 days at $60.00 equals $ 5,460.00 December, January and February require: 3 pullers per day $ 6.00 3 storage house men per day $ 6.00 Total per day $ 36.00 92 days at $36.00 equals $ 3,312.00 1 shipping clerk per day $ 8.00 330 days x 8 equals $ 2,640.00 Total Labor Cost $ 27,972.00 or 27972 / 60450 = 46.27 cent per ton Cost of Ammonia at 2 cent per ton $ 1,209.00 Cost of Oil and Waste at 2 cent per ton $ 1,209.00 Cost of Water at 3 cent per ton $ 1,813.50 Cost of Salt at 1/2 cent per ton $ 302.25 Plant Maintenance and Repairs $ 2,800.00 or 2800 / 60450 = 4.63 cent per ton [6] OFFICE EXPENSE: 1 Manager and Salesman per year $ 5,000.00 1 Bookkeeper per year $ 2,400.00 Stationery, Telephone, etc $ 600.00 Total Cost $ 8,000.00 or 8000 / 60450 = 13.23 cent per ton OVERHEAD CHARGES: 8 per cent Interest on $280,000.00 investment $ 22,400.00 8 per cent Interest on value of land ($12,000.00) $ 960.00 8 per cent interest on $8,000.00 working capita $ 640.00 3 per cent depreciation on $280,000.00 $ 8,400.00 Insurance (estimated) $ 1,200.00 Taxes (estimated) $ 2,500.00 Total Overhead Charge 36,100.00 or 36100 / 60450 = 69.72 cent per ton Total Expense $124,961.00 or 124961 / 60450 = $2.06.72 per ton NOTE--If the LUHR & FRIEDL ICE MAKING SYSTEM is used, the Ice Plant Labor Cost will be as follows: May, June, July, August, September and October require: 3 ice pullers per day $ 6.00 3 storage house men per day $ 6.00 Total per day $ 36.00 184 days at $ 36.00 equals $ 6,624.00 March, April and November require: 3 ice pullers per day $ 6.00 2 storage house men per day $ 6.00 Total per day $ 30.00 91 days at $ 30.00 equals $ 2,730.00 December, January and February require: 3 ice pullers per day $ 6.00 1 storage house man per day $ 6.00 Total per day $ 24.00 92 days at $ 24.00 equals $ 2,208.00 1 shipping clerk per day $ 8.00 330 days x 8 equals. $ 2,640.00 Total Labor Cost. $ 14,202.00 or 14202 / 60450 = 23.49 cent per ton compared to 46.27 cent per ton, A SAVING OF 22.78 CENT PER TON. [7] [Illustration: Typical Design of a 160 Ton Steam Driven Ice Plant. Interior Details.] [8] [Illustration: Typical Design of a 160 Ton Steam Driven Ice Plant.] Exterior Cross Section In connection with Otto Luhr Consulting Engineer & Herman Fridel Architect Ice Making System Patent Applied For [9] NUMBER THREE Manufacturing Costs Per Ton of Ice Using Steam Power at Medium-Sized-Town Rates for Labor 160-ton capacity per day. 1,728--400-lb. cans. 333 days continuous full output. 12,000-ton storage house. COST OF POWER: A modern, highly efficient and economical steam driven high speed compressor plant must be installed so as to get the maximum power out of coal. The boiler room will contain two 250-H. P. water-tube boilers with automatic stokers and coal bin overhead holding two weeks' supply of coal. Steam pressure 175 lbs. As the firing of the boilers is automatic and requires practically no work on the part of the engineers, no firemen are needed. Ashes will also be removed automatically. The engine room equipment will consist of two 175-ton high speed compressors, direct connected to two Simple Condensing Una-flow Engines; also two generators, two cooling tower water pumps, two air compressors, switchboard, etc. All to be equipped with the latest labor and power-saving devices. Equipped as above, 25 tons of refrigeration can be easily obtained from one ton of ordinary 12,500 B T U coal. 1.8 ton of refrigeration is required to produce one ton of ice including the required cooling of storage house. Therefore the power cost of making one ton of ice with coal at $5.00 per ton equals $5.00 divided by 25/1.8 = 37 cent. (One cent per ton of ice is added for heating of dipping tank water.) Assuming one month's shut-down for inspection and repairs, the total output of 160 tons of ice for 333 days amounts to 53,280 tons of ice. The total power cost of making 53,280 tons of ice is therefore, 53,280 x 37 cent = $ 19,713.60 [10] ENGINE ROOM AND ICE PLANT LABOR COST: 1 chief engineer per day $ 8.00 3 engineers per day $ 6.00 1 shipping clerk per day $ 6.00 3 men in Storage House per day $ 4.00 Total per day $ 44.00 365 days at $44.00 per day equals $ 16,060.00 Additional labor cost for putting 12,000 tons into winter storage and taking out at $4.00 per day $ 1,200.00 Total Labor Cost $ 17,260.00 or 17260 / 53280 = 32.4 cent per ton Engineers will do their own firing of boilers and will pull all the ice. One pull required every 43 minutes. OFFICE EXPENSE: 1 Office Man (Manager and Bookkeeper) $ 3,000.00 Stationery, Telephone, etc. (per year) $ 300.00 Total Office Expense $ 3,300.00 or 3300 / 53280 = 6.2 cent per ton of ice Cost of Ammonia at 2 cent per ton $ 1,065.60 Cost of Oil and Waste at 2 cent per ton $ 1,065.60 Cost of Water at 3 cent per ton $ 1,598.40 Cost of Salt at 1/2 cent per ton $ 266.40 Plant Maintenance and Repairs $ 2,200.00 or 2200 / 53280 = 4.1 cent per ton [11] OVERHEAD CHARGES: 8 per cent interest on $220,000.00 investment equals $ 17,600.00 8 per cent interest on value of land ($10,000.00) $ 800.00 8 per cent interest on working capital ($7,500.00) $ 600.00 3 per cent depreciation on $220,000.00 $ 6,600.00 Insurance (estimated) $ 1,000.00 Taxes (estimated) $ 2,000.00 Total overhead charges $ 28,600.00 or 28600 / 53280 = 53.7 cent per ton Total Expense $ 75,069.60 or 75069.60 / 53280 = $ 1.409 per ton Divided as follows: Overhead charges $ 0.53.7 Manufacturing Cost (total) $ 0.87.2 [12] NUMBER FOUR Manufacturing Costs Per Ton of Ice Using Steam Power at Medium-Sized-Town Rates for Labor 100-ton capacity per day. 1,080--400-lb. cans. 333 days continuous full output. 7,600-ton Storage House. COST OF POWER: A modern, highly efficient and economical steam driven high speed compressor plant must be installed so as to get the maximum power out of coal. The boiler-room will contain two 200-H. P. water-tube boilers with automatic stokers and coal bin overhead holding two weeks' supply of coal. Steam pressure 175 lbs. As the firing of the boilers is automatic and requires practically no work on the part of the engineers, no firemen will be needed. Ashes will also be automatically removed. The engine room equipment will consist of two 100-ton high speed compressors, direct connected to two Simple Condensing Unaflow Engines; also two generators, two cooling tower pumps, two air compressors, switchboard, etc. All to be equipped with the latest labor and power-saving devices. Equipped as above, 25 tons of refrigeration can be easily obtained from one ton of ordinary 12500 B T U coal. 1.8 tons of refrigeration is required to produce one ton of ice, including the cooling of the storage house. Therefore, the power cost of making one ton of ice with coal at $5.00 per ton equals $5.00 divided by 25/1.8 = 37 cent. (One cent per ton of ice is added for heating of dipping-tank water.) Assuming one month's shut down for inspection and repairs, the total output of 100 tons of ice for 333 days amounts to 33,300 tons of ice. The total power cost of making 33,300 tons of ice is therefore, 33,300 x 37 cent, equals $ 12,321.00 [13] ENGINE ROOM AND ICE PLANT LABOR COST: 1 Chief Engineer per day $ 8.00 3 Engineers per day $ 6.00 2 Storage House Men per day $ 4.00 Total per day $ 34.00 Total 365 days at $34.00 per day $ 12,410.00 Additional labor cost for putting 7,500 tons into winter storage and taking out at $4.00 per day $ 750.00 Total labor cost $ 13,160.00 or 13160 / 33300 = 39.52 cent per ton Engineer will do his own firing of boilers and will pull all the ice and set it up in ante room if required. One pull required every 70 minutes. Chief Engineer will act as shipping clerk. OFFICE EXPENSE: 1 Office Man (Manager and Bookkeeper) $ 3,000.00 Stationery, Telephone, etc. (per year) $ 300.00 Total Office Expense $ 3,300.00 or 3300 / 33300 = 9.9 cent per ton Cost of Ammonia at 2 cent per ton $ 666.00 Cost of Oil and Waste at 2 cent per ton $ 666.00 Cost of Water at 3 cent per ton $ 999.00 Cost of Salt at 1/2 cent per ton $ 166.50 Plant Maintenance and Repairs $ 1,500.00 or 1500 / 33300 = 4.5 cent per ton [14] OVERHEAD CHARGES: 8 per cent interest on $150,000.00 investment $ 12,000.00 8 per cent interest on value of land ($7,000.00) $ 560.00 8 per cent interest on $5,000.00 working capital $ 400.00 3 per cent depreciation on $150,000.00 $ 4,500.00 Insurance (estimated) $ 700.00 Taxes (estimated) $ 1,360.00 Total overhead charges $ 19,520.00 or 19520 / 33300 == 68.7 cent per ton Total Expense $ 52,298.50 or 52298.50 / 33300 = $1.57 per ton Divided as follows: Overhead charges 68.7 cent Manufacturing Cost 98.3 cent [15] OTTO LUHR CONSULTING ENGINEER & HERMAN FRIEDL ARCHITECT ICE MAKING SYSTEM 154 W. RANDOLPH STREET, CHICAGO [End of Document] [Transcriber's Note] I found this document and the attached papers and photographs among my father's papers. I offer it as an insight into the finances and structure of business and trades in the early 1900's. There are no dates included in this document but a Google search of "Otto Luhr" produced these items: Mechanical and Refrigerating Engineer's Handy Book; Otto Luhr; 1913. Automatic refrigerating liquid feeder and regulator; United States Patent 1725875; 8/27/1929. Refrigerator car; United States Patent 1642882; 9/20/1927. Since the title page states "Patent Applied For", this document was probably published around 1925. Note the prices quoted for materials and labor: Coal, $5.00 a ton. [In 2009, about $100/ton, down from $300 in 2008.] Unskilled Labor, $6.00/day; that's DAY, not HOUR. Skilled Labor, $8 to $10/day Electricity, $0.009/KWH [my latest bill (in 2009) was $0.1317/KWH] Note the job titles in the attached documents: Barnmen, Washers, Blacksmiths The word "MAINTAINANCE" is thus spelled in the original. Finally, the optimistic tone of the document contrasts with the decline of the ice business in the 1940's, fifteen years later. I remember the ice deliveries and the weight sign my mother put in the window before we got our first mechanical refrigerator after World War II. [End Transcriber's Note] [Illustration: Photograph of machinery.] [Illustration: Photograph of Detroit Creamery building exterior.] DETROIT CREAMERY COMPANY ORGANIZATION 1 -- Board of Directors 2 -- Operating Committee Harry A. McDonald President Nelson J. Dessert Vice president Carl F. Siclaff Vice president Harry J. Weigand Treasurer & Comptroller Jerome H. Remick Ice Cream Sales & Service J. Harry Brickley Retail Milk Sales Oliver G. Spaulding Legal Department Richard L. Baire Advertising Frank McVeigh Purchasing Department Ben F. Taylor Ice Cream Production Ben F. Taylor Ice Cream Delivery Edward C. Krahl Henry St. Production Doc Grayson Laboratory John Kostuch Plant Engineer--Maintenance John Kostuch Power & Refrigeration J. Harry Watson Transportation J. Harry Watson Shops H. Terry Snowday Wholesale Milk Sales Carl O. Tuttle Butter Department Tom Wood Credit & Collections J. McWilliams Detroit Creamery Farms TREASURER & COMPTROLLER Harry J. Weigand Accounting - Detroit Creamery & Subsidiaries Loans & Contracts - Detroit Creamery & Subsidiaries Appropriations - Detroit Creamery & Subsidiaries Banks - Detroit Creamery & Subsidiaries Account Dept Personnel - Detroit Creamery & Subsidiaries Credits & Collections Corporate Records Purchasing Department Legal Department PLANT ENGINEERING--MAINTAINANCE POWER and REFRIGERATION John Kostuch (Chief Engineer) Paul Culver (Consulting) Norman Mitehell (Technical) (Advisory) (Dept. Head) HENRY STREET (MAINTAINANCE) James Crunnley (In Charge) (a) Electrical & General (Ray Casson) (b) Conveyors, Bottle Washers, Fillers, Cappers (Howard Strauss) (c) All other Machinery (Assign Mechanics) HENRY STREET (POWER & REFRIGERATION) Harry Hollenbeck (In Charge) (a) Engineers (b) Firemen MAIN PLANT (MAINTAINANCE) (POWER & REFRIGERATION) John Kostuch (In Charge) REC. STATIONS & MFG. PLANTS John Kostuch (Chief) Elmer DeWitt(Asst) Frank Mortimer (Mech) C. S. McBride (Production Dept.) SUBSIDIARY COMPANIES John Kostuch (Chief) Paul Culver--Norman Mitchell--Dept. Head MACHINE SHOP (MAIN PLANT) John Kostuch (In Charge) TRANSPORTATION & SHOPS J. Harry Watson Garages Detroit Subs. (Advisory) Auto Shops Detroit (Met. Area) Subs. (Advisory) Paint Shops Detroit & Subs. Electrical Shops Detroit Subs. (Advisory) Carpenter Shops Detroit & Sub. (Advisory) Stables Detroit (Advisory) Barnmen Sub. (Advisory) Washers Blacksmiths Wagon Shops Detroit & Subs Harness Shops Detroit & Subs. Plumbing Shops Detroit Sign Shop Detroit & Subs. Tin Shop Detroit & Subs. Special Delivery and Trucking Detroit (Main) Branch Trucking Special Trucking End of the Project Gutenberg EBook of Manufacturing Cost Data on Artificial Ice, by Otto Luhr and Herman Friedl *** END OF THIS PROJECT GUTENBERG EBOOK MFG. COST DATA--ARTIFICIAL ICE *** ***** This file should be named 29375.txt or 29375.zip ***** This and all associated files of various formats will be found in: http://www.gutenberg.org/2/9/3/7/29375/ Produced by Don Kostuch Updated editions will replace the previous one--the old editions will be renamed. Creating the works from public domain print editions means that no one owns a United States copyright in these works, so the Foundation (and you!) can copy and distribute it in the United States without permission and without paying copyright royalties. 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