EEasley Posted February 28, 2011 Share Posted February 28, 2011 I am working on a problem that involves the mixing of groundwater with a thermal water of mixed composition (it is not a thermal end-member, it has been mixed with GW). I am using REACT and first entering the groundwater end-member in the Basis, running to get the speciation, and picking up the fluid as the reactant. Then I entered the mixed thermal water as the basis and reacted the two. My main question is in handling the temperatures. The groundwater is ~ 11C and the mixed thermal water is ~66C. When I first ran the groundwater and picked it up, does the program keep the 11C temperature that is specified initially, or do I have to re-enter the temperature on the Basis page? I tried setting the third option under the Temp tab, and putting the initial T as 66C and the reactants T as 11C. The purpose of this reaction path is to extrapolate the chemical composition of the pure thermal end-member, but I am not sure if I am going about this the right way. I was hoping to look at the behavior of Cl, HCO3, and SO4 as the fluids are mixed and figure out the saturation limits of these components. I've attached the file below. I'm getting some weird results when I plot the components (Cl, SO4, and HCO3) vs. temperature. Thanks so much. Also, below are the original basis for the GW and thermal water. I set the charge balance on Bicarb b/c I used a field titration to get the data and it seems to be adding a significant amount of error to the charge balance. I also have the flash option on. Basis Groundwater (in mg/kg) Ca++ 16 Mg++ 2.85 Na+ 2.707 K+ 0.4699 HCO3- 47 SO4-- 16 Cl- 1.176 F- 0.109 pH 8.22 O2(aq) 8.45 Temp 11 C Basis- Mixed Thermal Water Ca++ 8.277 Mg++ 0.409 Na+ 148.6 K+ 8.776 HCO3- 117 SO4-- 170.7 Cl- 13.8 F- 16.11 pH 8.22 O2(aq) 1.36 Temp 66 C EEasley Mixing.rea Quote Link to comment Share on other sites More sharing options...
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