Steam Tables, How Do They Derive the Values? (General Interest)
Steam Tables, How Do They Derive the Values? (General Interest)
(OP)
Does any one know who the values in steam tables are derived? I reguarly use them, but have never actually been informed of how they are actually physically derived. Does any one know?
I have had a bit a look around to no avail.
Thanks,
Lyle
I have had a bit a look around to no avail.
Thanks,
Lyle





RE: Steam Tables, How Do They Derive the Values? (General Interest)
ER
RE: Steam Tables, How Do They Derive the Values? (General Interest)
Regards
RE: Steam Tables, How Do They Derive the Values? (General Interest)
Also two guys from Cambridge did alot of early work in this area, search under Keenan and Keyes for more perhaps historical info.
Good luck!
RE: Steam Tables, How Do They Derive the Values? (General Interest)
Fitting the viscosity data to a model
one could curve fit the process..
where:
(uo,To) is a reference point...
the quadratic model function of the form
does a much better job. The quantities ui and Ti,
are a transformation of variables ui and Ti
given by:
running a least square fit on the transformed data
originating from data in the temperature range from
210 deg to 300 deg C results in coeficients:
the resulting fit has an error less than
0.11 percent in the temperature range 300 deg C.
however although the tables were curve fit to
a certain degree...sivaiop is correct they
were experimentally established.
wilg5404@aol.com