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Energy portal; Crack spread is a term used on the oil industry and futures trading for the differential between the price of crude oil and petroleum products extracted from it. . The spread approximates the profit margin that an oil refinery can expect to make by "cracking" the long-chain hydrocarbons of crude oil into useful shorter-chain petroleum produc
Fracture mechanics is the field of mechanics concerned with the study of the propagation of cracks in materials. It uses methods of analytical solid mechanics to calculate the driving force on a crack and those of experimental solid mechanics to characterize the material's resistance to fracture.
The plant follows a 10-5-3-2 crack spread, meaning that for ten barrels of crude feedstock, the refinery produces five barrels of gasoline, three barrels of distillate, and two barrels of fuel oil. About one hundred miles (160 km) north of Seattle, the Ferndale Refinery was the first of five refineries in Washington.
3 321. 1 comment. 4 how does this fair for big oil Chevron, ... Toggle the table of contents. Talk: Crack spread. Add languages. Page contents not supported in other ...
In fracture mechanics, the energy release rate, , is the rate at which energy is transformed as a material undergoes fracture.Mathematically, the energy release rate is expressed as the decrease in total potential energy per increase in fracture surface area, [1] [2] and is thus expressed in terms of energy per unit area.
Nation's Worst Cold Outbreak. Adding an exclamation point to a two-week siege widely considered the nation's worst, most prolific cold outbreak, a Blue Norther plowed through the Plains on Feb. 10 ...
Cindy Crawford has one outfit in mind whenever Super Bowl season comes around.. On Feb. 10, the supermodel, 58, took to Instagram with a photo — presumably in honor of the big game that happened ...
In fracture mechanics, a crack growth resistance curve shows the energy required for crack extension as a function of crack length in a given material.For materials that can be modeled with linear elastic fracture mechanics (LEFM), crack extension occurs when the applied energy release rate exceeds the material's resistance to crack extension .