Joule-Thomson coefficient


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Joule-Thomson coefficient

[′jül ′täm·sən ‚kō·ə‚fish·ənt]
(thermodynamics)
The ratio of the temperature change to the pressure change of a gas undergoing isenthalpic expansion.
References in periodicals archive ?
As seen in Figure 3(d), Joule-Thomson coefficient having positive values decreased from 8.8 to 6.4[degrees]C/MPa as approaching to the well-bottom; positive values of Joule-Thomson coefficient imply the adiabatic heating with C[O.sub.2] compression, and its effect was relatively large at the shallow depth.
For example, C[O.sub.2] profile in Case 2-4 (50 kg/s) approximately lied along ~5[degrees]C/MPa contour line for Joule-Thomson coefficient shown in Figure 3(d).
Caption: Figure 3: Contours of (a) density [kg/[m.sup.3]] and viscosity [[10.sup.-5] Pa x s] and (b) enthalpy [kJ/kg] and Joule-Thomson coefficient [[degrees]C/MPa] in P-T space.