Companion Study Guide on Short Course on Geothermal ... - OSTI

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6.20 6.10 6.00 5.90 5.80 5.70 5.60 5.50 5.40 5.30 5.20 5.10 5.00 70 80 90 100 110 120 Figure A-3 The solubility product of gypsum (calcium sulfate dihydrate) in low-temperature geothermal waters. The solubility product is expressed on a ppm mass basis, rather than a molar basis, and is corrected for ionic strength and temperature. 130 T 0 F 140 4 150 160 gypsum 170 180 190 200
WORKSHEET 1 - IONIC BALANCE TDS = ______________ ppm or ______________ mg/l Cations moles/l eq/l pH __________ 10 -pH = __________ x 1 + __________ ppm ÷ D = mg/l ÷ FW(mg) = __________ Na + __________ = _________ ÷ 22989.2 = __________ x 1 = __________ K + __________ = __________ ÷ 39102.0 = __________ x 1 = __________ Ca +2 __________ = __________ ÷ 40080.0 = __________ x 2 = __________ Mg +2 __________ = __________ ÷ 24312.0 = __________ x 2 = __________ Total Cations (eq/1) __________ Anions -2 SO4 __________ = __________ ÷ 96061.6 = __________ x 2 = __________ - HCO3 __________ = __________ ÷ 61017.3 = __________ x 1 = __________ -2 CO3 __________ = __________ ÷ 60009.4 = __________ x 2 = __________ Cl - __________ = __________ ÷ 24312.0 = __________ x 2 = __________ Total Anions (eq/l) __________ The total cations should equal the total anions. A 10 percent difference is acceptable. Note: 1. For solutions containing less than 14,000 ppm Total Dissolved Solids (TDS), ppm = mg/l with less than 1 percent error. 2. D = density in Kg/l = (1 ÷ 6.95.10 -7 TDS [mg/l]) = 1/([1-6.95.10 -7 TDS ppm]) = ________. 3. If carbon dioxide species are expressed as Total Alkalinity (TA) as mg/l CaCO3, equate the - - TA to HCO3 . CaCO3 x 0.8196 = HCO3 .
Page 1 and 2: DCN 85-212-040-01 COMPANION STUDY G
Page 3 and 4: The principal effects of these spec
Page 5 and 6: Crevice corrosion is similar to pit
Page 7 and 8: Table 3. Geothermal Resources Corro
Page 9 and 10: Low alloy steels (steels containing
Page 11 and 12: Figure 1. Chloride required to prod
Page 13 and 14: geothermal heating systems require
Page 15 and 16: Table 5. Material/Design Interactio
Page 17 and 18: This section presents guidelines fo
Page 19 and 20: Table 7. Equipment of Residential a
Page 21 and 22: Steel Wide experience with steel in
Page 23 and 24: Thus, if the GHP system designer co
Page 25 and 26: APPENDIX A Worksheets for Chemical
Page 27 and 28: The interpretation is as follows: G
Page 29: Figure A-2 Determination of Kc for
Page 33 and 34: FLUID PROPERTIES WORKSHEET 2A - ION

Companion Study Guide on Short Course on Geothermal ... - OSTI

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