Therminol® 59 Heat Transfer Fluid
Description
Therminol 59 is a synthetic heat transfer fluid with excellent low temperature pumping characteristics and thermal stability.
- Heating or Cooling Operation—Therminol 59 has surprisingly low viscosity for a high-temperature heat transfer fluid. It is ideally suited for combination heating and cooling applications, delivering great heat transfer rates even at 20°C (70°F). Batch processes will benefit from the excellent cooling performance Therminol 59 delivers.
- Superb Low viscosity– At exceptionally cold temperatures makes this an ideal fluid for colder climates. In fact, Therminol 59 was originally developed for use on the North Slope in Alaska, a supreme test of low-temperature pumpability.
- Long Life Means Low Cost—High reliability, trouble-free operation, even when operating continuously at the recommended upper temperature limit of 315°C (600°F). Long life means fewer fluid change-outs, and that means low operating cost.
Typical Properties
| Property | Test Method | Typical Value, Units |
| Appearance | Clear yellow to dark amber liquid | |
| Composition | Alkyl substituted aromatic | |
| Maximum bulk temperature | 315 °C (600 °F) | |
| Maximum Film Temperature | 345 °C (650 °F) | |
| Normal Boiling Point | 289 °C (553 °F) | |
| Pumpability @ 300 mm2/s (cSt) @ 2000 mm2/s (cSt) | -37 °C (-35 °F) -49 °C (-56 °F) | |
| Autoignition Temperature | ASTM E659 DIN 51794 | 372 °C (702 °F) 404 ºC (760 ºF) |
| Flash Point COC PMCC | ASTM D92 ASTM D93 | 146 °C (295 °F) 132 ºC (270 ºF) |
| Pour Point | ISO 3016 ASTM D 97 | -68 °C (-90 °F) -61 ºC (-78 ºF) |
| Minimum liquid temperatures for fully developed turbulent flow (NRe > 10000) 10 ft/s, 1-in. tube (3.048 m/s, 2.54-cm tube) 20 ft/s, 1-in. tube (6.096 m/s, 2.54-cm tube) | 17 °C (63 °F) 0 °C (32 °F) | |
| Minimum liquid temperatures for transitional region flow, (NRe > 2000) 10 ft/s, 1-in. tube (3.048 m/s, 2.54-cm tube) 20 ft/s, 1-in. tube (6.096 m/s, 2.54-cm tube) | -16 °C (4 °F) -24 °C (12 °F) | |
| Coefficient of thermal expansion @ 200°C | 0.000946 /°C (0.000525 /°F) | |
| Heat of Vaporizationa | 227 kJ/kg (97.5 Btu/lb) | |
| Viscosity, Kinematic @ 100ºC @ 40ºC | ASTM D 445 ASTM D 445 | 1.44 cSt, mm2/s 4.00 cSt, mm2/s |
| Liquid Density @ 15ºC @ 25ºC | ASTM D 4052 ASTM D 4052 | 978 kg/m3 (8.16 lb/gal) 971 kg/m3 (8.10 lb/gal) |
| Acidity | ASTM D 664 | <0.2 mg KOH/g |
| Pseudocritical temperature | 514 °C (957 °F) | |
| Pseudocritical pressure | 22.3 bar (323 psia) | |
| Pseudocritical density | 287 kg/m3 (17.9 lb/ft3) | |
| Molecular Weight (Average) | 207 | |
| Moisture Content, maximum | ASTM E-203 | 200 ppm |
| Dielectric Constant @ 23°C | ASTM D-924 | 2.52 |
| Copper Corrosion | ASTM D 130 | <<1a |
Key Attributes
- Heating or Cooling Operation
- Long Life Means Low Cost
- Superb Low Temperature Pumpability
Applications
- htf – production of biodiesel
- Biomass – orc
- Desalination
- Gas to liquid (gtl)
- Natural gas purification
- Oil or gas processing
- Polymer & plastic
- Specialty chemicals
- Waste heat recover + orc