Abstract
Energy gases are mainly composed of methane, and they are
dried prior to pumping to natural gas grids. To avoid
condensation of water-vapor related problems, the
dew-point temperature is monitored. In dew-point
temperature measurements, however, the water-vapor
enhancement factor is needed to correct effects caused by
pressure changes and to enable unit conversions when
using instruments based on indirect measurement
principles. In the work reported in this paper, new
experiments were carried out, and methane–water
equilibrium data available in the literature were
analyzed for deriving a new equation. The derived
equation provides an easy calculation method for the
water-vapor enhancement factor in methane as a function
of pressure and dew-point temperature. An uncertainty
analysis for the equation is also presented covering the
whole studied pressure ranging from atmospheric pressure
up to 7 MPa, and the dew-point temperature ranges from
+20°C down to hydrate forming temperatures.
| Original language | English |
|---|---|
| Pages (from-to) | 1280-1289 |
| Journal | International Journal of Thermophysics |
| Volume | 35 |
| Issue number | 6-7 |
| DOIs | |
| Publication status | Published - 2014 |
| MoE publication type | A1 Journal article-refereed |
Keywords
- dew-point temperature
- enhancement factor
- humidity
- methane
- natural gas