7 Parameter of the gas
Manual ERZ 2000-NG · EN07 · 2019, May 13th
270
Note
The Joule-Thomson coefficient
μ
can be positive or negative. For air, the tem-
perature increases with a pressure increase (heating up of the valve with an air
pump) and decreases as pressure decreases. With natural gas, the Joule-
Thomson coefficient
μ
has the same algebraic sign; the temperature decreases
as pressure decreases. In order to prevent adverse effects of the gas pressure
regulating system due to excessively low temperatures, the compressed gas is
often preheated.
Due to the identical structure of the preceding menus, no further representations and
explanations are provided here.
Summary of Contents for ERZ2000-NG
Page 10: ......
Page 68: ...2 Introduction Manual ERZ 2000 NG EN07 2019 May 13th 58 Figure 44 Menu LA Overview...
Page 69: ...2 Introduction Manual ERZ 2000 NG EN07 2019 May 13th 59 Figure 45 Menu LB Totalizer BM1...
Page 77: ...2 Introduction Manual ERZ 2000 NG EN07 2019 May 13th 67 Figure 51 Overview System sub menu...
Page 241: ...6 Flow meters Manual ERZ 2000 NG EN07 2019 May 13th 231 Figure 167 Interface module C34...
Page 340: ...8 Overview Coordinates Manual ERZ 2000 NG EN07 2019 May 13th 330 8 5 6 TSV export...
Page 453: ...Certificates Manual ERZ 2000 NG EN07 2019 May 13th 443...