Abstract: A raw material fluid treatment plant is provided with a raw material reaction apparatus for reacting a raw material fluid to form a reaction gas. The raw material reaction apparatus includes preheaters and a reactor. The preheaters are heat exchangers that perform heat exchange between a second heat transfer medium and the raw material fluid to heat the raw material fluid. The reactor is a heat exchanger that performs heat exchange between a first heat transfer medium differing from the second heat transfer medium and the raw material fluid having been heated by the preheaters to heat and react the raw material fluid.

Abstract: A raw material fluid treatment plant provided with a raw material reaction apparatus for reacting a raw material fluid to form a reaction gas. The raw material reaction apparatus includes preheaters and a reactor. The preheaters are heat exchangers that perform heat exchange between a second heat transfer medium and the raw material fluid to heat the raw material fluid. The reactor is a heat exchanger that performs heat exchange between a first heat transfer medium differing from the second heat transfer medium and the raw material fluid having been heated by the preheaters to heat and react the raw material fluid.

Abstract: An object of the invention is to provide a technique capable of performing strategic inventory management in consideration of a profitability for each item by calculating an inventory management cost in accordance with an actual state in consideration of an item characteristic, a cost occurrence factor, and the like for each item. An inventory assessment device according to the invention stores relevance data in which a combination of occurrence cause items, which are causes of occurrence of inventory management cost items, is defined for each of the cost items, and calculates a load ratio of the inventory management cost for each of items having the same combination of the occurrence cause items (see FIG. 1).