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Days available for harvesting switch...

Hwang, Seonghuyk.

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Days available for harvesting switchgrass and the cost to deliver switchgrass to a biorefinery.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Days available for harvesting switchgrass and the cost to deliver switchgrass to a biorefinery./
作者:	Hwang, Seonghuyk.
面頁冊數:	215 p.
附註:	Adviser: Francis Epplin.
Contained By:	Dissertation Abstracts International68-07A.
標題:	Economics, Agricultural. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3274626
ISBN:	9780549132431

Days available for harvesting switchgrass and the cost to deliver switchgrass to a biorefinery.
Hwang, Seonghuyk.

Days available for harvesting switchgrass and the cost to deliver switchgrass to a biorefinery. - 215 p.

Adviser: Francis Epplin.

Thesis (Ph.D.)--Oklahoma State University, 2007.

Scope and method of study. The purpose of this study was to estimate the number of suitable field workdays per month in which switchgrass can be harvested in Oklahoma at different probability levels. This study also sought to determine the effect of the number of workdays on the cost to deliver a flow of feedstock to a biorefinery. A soil moisture balance model, drying model of cut grasses, and empirical CDF were used to determine the number of field workdays for mowing and baling operations at different probability levels. A mixed integer mathematical programming model was used to determine the optimal biorefinery location, the quantity of biomass feedstock, monthly harvest and storage quantities, optimal number of mowing and raking-baling-stacking harvest machines, and the cost to deliver feedstock to a biorefinery.

ISBN: 9780549132431Subjects--Topical Terms:

626648
Economics, Agricultural.

Days available for harvesting switchgrass and the cost to deliver switchgrass to a biorefinery.
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245 1 0 $a Days available for harvesting switchgrass and the cost to deliver switchgrass to a biorefinery.
300 $a 215 p.
500 $a Adviser: Francis Epplin.
500 $a Source: Dissertation Abstracts International, Volume: 68-07, Section: A, page: 3060.
502 $a Thesis (Ph.D.)--Oklahoma State University, 2007.
520 $a Scope and method of study. The purpose of this study was to estimate the number of suitable field workdays per month in which switchgrass can be harvested in Oklahoma at different probability levels. This study also sought to determine the effect of the number of workdays on the cost to deliver a flow of feedstock to a biorefinery. A soil moisture balance model, drying model of cut grasses, and empirical CDF were used to determine the number of field workdays for mowing and baling operations at different probability levels. A mixed integer mathematical programming model was used to determine the optimal biorefinery location, the quantity of biomass feedstock, monthly harvest and storage quantities, optimal number of mowing and raking-baling-stacking harvest machines, and the cost to deliver feedstock to a biorefinery.
520 $a Findings and conclusions. Harvest cost depends on the number of required harvest machines, which are constrained by the number of field workdays during the harvest window. The number of workdays for mowing and baling varies across months and regions. At the 95 percent probability level, October is the month with the least amount of time for baling switchgrass (average nine days). The southeast region of Oklahoma, which on average receives the most precipitation, has the least number of available workdays (174 mowing days and 115 baling days for a year). This information was used to determine the investment required in harvest machines to provide lignocellulosic biomass to a biorefinery. The optimal number of harvest units was 48 for mowing and 20 for raking-baling-stacking, which requires an average investment in harvest machines of $1 1.2 million for a 2,000 dry tons per day biorefinery. The estimated cost to deliver feedstock was $4 9.7 per ton and harvest cost was $1 7.0. Under the assumption of only three days available in each month as workdays, the estimated cost to deliver feedstock and harvest cost were $1 41 and $1 09, respectively. Ignoring or using an incorrect estimate of the number of workdays would result in incorrect feedstock cost estimates and an incorrect estimate of the investment required in harvest machinery.
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790 1 0 $a Chung, Chanjin $e committee member
790 1 0 $a Epplin, Francis, $e advisor
790 1 0 $a Raymond, Huhnke $e committee member
791 $a Ph.D.
792 $a 2007
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