请问ASPEN PROII 等软件里面的闪点是开口还是闭口的? 看了下pro11的帮助，既不是开口也不是闭口。 the flash point is a test designed to determine the temperature at which the vapor above an oil will momentarily "flash" or explode. there are three common tests: the open cup (d92), the pensky-martens (d93) and the tag (d56) closed tester for light oils. the oil is heated at a constant rate and a test flame is periodically introduced into the vapor. the flash point is the temperature at which the oil vapors "flash". results vary somewhat, depending on the test method. the following methods are available for calculation of the flash point in pro/ii: nelson this method was devised by w. l. nelson and computes the flash point with this equation: flash point, deg f = 0.64*t - 100 where: t = average astm temperature of 0 to 10 percent distilled material, deg f. this method is not accurate enough to distinguish between the various laboratory tests. api this method uses api procedure 2b7.1 which relates the flash point to the d86 10 percent distilled. flash points correspond to the pensky-martens test procedure. aspen 里有所不同 aspen plus provides several properties representing different methods of calculating the flash point. the following methods are available: flpt-api, the api method for determining flash point flpt-pm, the pennsky-martens method (astm-d93) flpt-tag, the tag method (astm-d56) flpt-api uses the astm d86 10% temperature for the petroleum fraction or the normal boiling point for pure components in a procedure based on the api computerized procedure 2b7.1. linear extrapolation is also performed. the other two methods use a modified bubble point calculation described in seader and henley. these methods use mole-weight-modified k-values for a bubble point flash in which the value of the summation , normally 1, has been replaced with an experimentally determined parameter a. the parameter a has different values for the two methods. [ ]查看更多
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