公开(公告)号：EP2951566A1

公开(公告)日：2015-12-09

申请号：EP14702039.0

申请日：2014-01-31

Applicant: Hochschule Kempten

Inventor： BRAUN, Jost ,  BRAUN, Kirsten

IPC: G01N25/20 ,  G01N33/22

CPC classification number: G01N33/225 ,  G01N25/20

Abstract: The invention relates to a method for determining a caloric value, in particular the enthalpy
h
2 , the internal energy
u
2 , and/or the entropy
s
2 , of a gas in a second state. The gas is transferred from a known first state to the second state or from the second state to a known first state in a thermodynamic process, in particular in a compression or expansion process in an engine, in a turbine, or in a compressor. In the method, the caloric value is determined with the aid of at least one analytical function
f . The at least one analytical function
f depends on the temperature
T and on the pressure
p or on the temperature
T and on the specific volume
v and has the following form:
f (
T,p ) =
g (
T )⋅(1+
k (
p or v,
T )). The at least one analytical function
f is determined with the aid of materials data for the gas.