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The cost of the chamber, material handling and boiler (12HP) were provided by company A: $298,350, $4000, and $8000 respectively. The chamber and material handling values were summed and multiplied by the number of kilns for each scenario of vacuum with air drying and vacuum with no air drying. The obtained value was then summed together to the price of the boiler. Pile roofs, bolsters, base and stickers’ costs were calculated using the cost information supplied by Plant E. An approximated number of piles were calculated for Plant C. A pile was estimated to be 12 feet long, containing approximately 8832 BF. The total volume or board foot presented in the air yard for each Plant C was divided by the total board feet presented in a pile. For Plant C a total of 214 piles were obtained. The estimated cost of a pile roof was $250. The pile roof cost was then multiplied by the number of piles for company C. The stickers had a price of $1.35/stick, so a number of 7 stickers per layer were calculated. The obtained value was then multiplied by the total number of layers (23) of each pack, and then by the total number of packs (4). Plant D provided a pile base and bolster cost of $8 and $11.5 respectively. A number of 6 bases per pile and 7 bolsters per pack were determined. The amount of bases and bolsters were multiplied by the price, and then by the total number of piles for Plant C. Road construction costs were estimated using values obtained from Plant D, which were $120,000. An online estimator where the area and location of the property was placed on the input of the online estimator and an approximated cost was given. The area given by Plant C was 20 acres. The land price was given by Plant D and the value was of $25000/acre. The respective acres of each company were multiplied by $25000 and the land area cost was obtained. The estimation of the air drying for vacuum drying was done because the drying rate is faster so the air drying will need more input to be able to load a kiln every 4 days. Volume was obtained by multiplying the chamber capacity (12.14 MBF) by the time it takes to be kiln dried (4 days), times the time it takes to be air dried (67 days). This value was then multiplied by the number of kilns, resulting in 42275 MBF. The pile estimation was done following the same procedures as in conventional drying. The obtained number of piles for Plant C was 628.The piles roofs, 75PDF Image | Impact of Vacuum-Drying on Efficiency of Hardwood Products
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