YH-PCM Series Phase Change Wax Product Features:
- The series offers a wide range of phase change temperatures, spanning from 20°C to 80°C.
- The product is capable of storing and releasing heat at a constant temperature.
- It boasts a high heat storage capacity, with a straight-chain alkane content in Fischer-Tropsch synthesis phase change wax exceeding 90%, resulting in a greater latent heat of phase change for normal alkanes.
- There is no supercooling or phase separation phenomenon.
- The product has a long service life and can be used through phase change cycles.
- It exhibits chemical stability, with very low impurity content, being non-toxic and non-corrosive.
Basic Information
| Indicator | PCM22 | PCM28 | PCM32 | PCM36 | PCM40 | PCM44 | PCM50 | PCM50H | PCM62 | PCM72 | PCM76 | PCM80 | testing method |
| Melting Point, °C | 21-23 | 26-28 | 30-32 | 35-37 | 39-41 | 42-44 | 48-50 | 49-51 | 61-63 | 71-73 | 75-77 | 79-81 | GB/T 2539 |
| Enthalpy Value，kJ/kg control values （Typical values) | ≥210 | ≥220 | ≥210 | ≥230 | ≥210 | ≥230 | ≥210 | ≥230 | ≥210 | ≥230 | ≥230 | ≥230 | GB/T 19466.3 |
| -(220) | -(230) | -(220) | -(240) | -(220) | -(235) | -(220) | -(245) | -(215) | -(235) | -(230) | -(230) | ||
| Heat Absorption Temperature Range1，℃ （Enthalpy Ratio） Heat Absorption Temperature Range2，℃（Enthalpy Ratio） | 20-26（～79%） | 25-32 | 29-35（～79%） | 32-40 | 37-43（～71%） | 38-46 | 47-53（～78%） | 45-54 | 50-66 | 63-73 | 69-78 | 76-83 | |
| 7-12（～21%） | none | 17-21（～21%） | none | 28-32（～29%） | none | 32-36（～22%） | none | none | none | none | none | ||
| Carbon Number Distribution | C17 | C18 | C19 | C20 | C21 | C22 | C23-C25 | C24 | C27-C31 | C31-C33 | C34-C36 | C37-C42 | SH/T 0653 |
| Major Paraffin Hydrocarbon Content ，Mass Fraction，control values （Typical values) | ≥95（96） | ≥97（98） | ≥75（77） | ≥97（98） | ≥85（87） | ≥97（98） | ≥86（87） | ≥97（98） | ≥86（87） | ≥92（94） | ≥82（85） | ≥82（85） | |
| Major Normal Paraffin Hydrocarbon Content，Mass Fraction，control values （Typical values) | ≥94（95） | ≥96（97） | ≥72（75） | ≥96（97） | ≥83（85） | ≥96（97） | ≥84（85） | ≥96（97） | ≥84（85） | ≥90（92） | ≥80（83） | ≥80（83） | |
| Specific Heat Capacity，J/g.K | 2.1 | 2 | 1.7 | 2.1 | 2.3 | 1.8 | 2 | 2.1 | 2.2 | 1.7 | 1.8 | 1.7 | ASTM E1269 |
| Thermal Conductivity，W/m.K | 0.33 | 0.29 | 0.31 | 0.3 | 0.29 | 0.33 | 0.23 | 0.27 | 0.18 | 0.23 | 0.27 | 0.24 | ASTM D7896 |
| Volume Shrinkage Rate，% | — | 11.3 | 10.3 | 12.25 | 10.85 | 9.6 | 10.7 | 12.35 | 11.62 | 11.35 | 13.6 | 13.35 | NB/SH/T 0588 |
| Density, 20℃，g/cm3 | 0.86 | 0.87 | 0.86 | 0.89 | 0.9 | 0.87 | 0.91 | 0.8 | 0.86 | 0.92 | 0.94 | 0.92 | GB/T 13377 |
| Flash Point，℃ | 147 | 155 | 157 | 178 | 181 | 189 | 195 | 187 | 230 | 231 | 237 | — | GB/T 3536 |
| Saybolt Color | ≥+25 | ≥+20 | GB/T 3555 | ||||||||||
| Odor， | ≤1 | SH/T 0414 | |||||||||||
| Benzene，mg/kg | Below detection limit（1mg/kg） | NB/SH/T 0707 | |||||||||||
| Toluene，mg/kg | Below detection limit（1mg/kg） | NB/SH/T 0707 | |||||||||||
| Polycyclic Aromatic Hydrocarbons, mg/kg | Below detection limit（1mg/kg） | SN/T 2934 | |||||||||||
| Water-soluble acids or bases | none | SH/T 0407 | |||||||||||
| water，% | none | GB/T 260 | |||||||||||
| Mechanical impurities（mass percentage），% | ≤0.005 | GB/T 511 | |||||||||||
| Ash content (mass fraction)，% | ≤0.01 | ISO 6245 | |||||||||||
