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All issues Volume 3 / No 3 (2024) Natl Sci Open, 3 3 (2024) 20230056 Full HTML

Table 2

Types of low-temperature salt hydrate PCMs (below 120°C) a [18–20]

Salt hydrate PCMs Melting temperature (°C) Supercooling degree (°C) Latent heat (J/g) Thermal conductivity (W/(m K)) Analytical reagent grade (CNY/kg) Other grades (CNY/kg) Industrial grade (Corresponding salt, CNY/kg) Chemical abstracts service number
LiClO3·3H2O 8 6 253.0 0.8 3083.8 3083.8 (99.9% metals basis) − 13453-78-6
ZnCl2·3H2O 10 − − − 767.0 * 420.0 (chemically pure grade) 0.426 7646-85-7
K2HPO4·6H2O 14 − 109.0 − 101.4 * 61.8 (purity 99%) 0.043 7778-77-0
KF·4H2O 18.5 33 231.0 − 140.0 * 104.9 (purity 95%) 0.860 7789-23-3
K2HPO4·4H2O 18.5 − 231.0 − 101.4 * 61.8 (purity 99%) 0.043 7778-77-0
FeBr3·6H2O 21 − 105.0 − − * 3327.8 (purity 98%) 28.000 10031-26-2
LiBO2·8H2O 25.7 − 289.0 − − * 4927.8 (purity ≥ 99.9%) 1.600 13453-69-5
Mn(NO3)2·6H2O 25.8 20 125.9 − − 3003.8 (purity 98%) − 17141-63-8
CaCl2·6H2O 29 30 190.8 0.5 48.0 * 32.0 (purity 96%) 0.009 10043-52-4
LiNO3·3H2O 30 40 296.0 − 1095.8 * 1355.8 (99.9% metals basis) − 7790-69-4
Na2SO4·10H2O 32 20 254.0 0.6 51.1 145.8 (guaranteed reagent grade) 0.350 7727-73-3
Na2CO3·10H2O 32 − 246.5 0.5 63.2 68.0 (guaranteed reagent grade) 0.152 6132-02-1
LiBr·2H2O 34 − 124.0 − − * 1946.3 (purity ≥ 99%) 1.520 7550-35-8
CaBr2·6H2O 34 60 115.5 − − * 8580.0 (purity ≥ 96%) 1.040 7789-41-5
Na2HPO4·12H2O 35 20 280.0 0.5 156.5 196.7 (guaranteed reagent grade) 0.020 10039-32-4
Zn(NO3)2·6H2O 36.4 − 147.0 0.5 257.4 1449.8 (99.99% metals basis) − 10196-18-6
FeCl3·6H2O 37 − 223.0 − 144.0 103.5 (purity 98%) − 10025-77-1
Mn(NO3)2·4H2O 37.1 − 115.0 − − 1423.8 (purity 98%) − 20694-39-7
CoSO4·7H2O 40.7 − 170.0 − 297.6 1078.8 (99.99% metals basis) 0.375 10026-24-1
KF·2H2O 42 − 162.0 − 561.2 721.8 (purity 98%) − 13455-21-5
Ca(NO3)2·4H2O 43 65 138.0 − 478.0 3805.8 (99.98% metals basis) − 13477-34-4
Fe(NO3)2·9H2O 47 − 155.0 − 187.2 1320.0 (99.9% metals basis) 0.125 7782-61-8
K2HPO4·3H2O 48 − 99.0 − 156.5 1180.4 (99.99% metals basis) 0.019 16788-57-1
Na2S2O3·5H2O 48 65 209.0 0.4 − 41.7 (guaranteed reagent grade) 0.064 10102-17-7
Na2HPO4·7H2O 48 − 170.0 − 318.8 284.0 (purity ≥ 98%) 0.019 7782-85-6
MgSO4·7H2O 48.5 − 202.0 − 44.2 59.2 (guaranteed reagent grade) 0.345 10034-99-8
Na(CH3COO)·3H2O 58 90 270.3 0.9 46.0 50.0 (guaranteed reagent grade) 0.028 6131-90-4
Cd(NO3)2·4H2O 59.5 − − − 169.6 2157.8 (99.99% metals basis) − 10022-68-1
FeSO4·7H2O 64 − 200.0 − 68.1 1577.8 (99.95% metals basis) 0.028 7782-63-0
Na2P2O7·10H2O 70 70 184.0 − 94.0 − 0.035 13472-36-1
Li(CH3COO)·2H2O 70 − 150.0 − 734.5 873.6 (99.9% metals basis) 1.600 6108-17-4
Al(NO3)2·9H2O 72 − 155.0 − 78.3 1143.2 (99.99% metals basis) − 7784-27-2
Ba(OH)2·8H2O 78 − 265.7 0.7 176.9 136.5 (purity ≥ 98%) 0.595 12230-71-6
Al2(SO4)3·18H2O 88 27 − − 73.2 94.8 (purity ≥ 99%) 0.780 7784-31-8
Mg(NO3)2·6H2O 89 70 162.8 0.6 − − − 13446-18-9
KAl(SO4)2·12H2O 91 − 269.0 − 50.4 − 0.048 7784-24-9
(NH4)Al(SO4)2·12H2O 95 − 269.0 − 37.3 64.4 (chemically pure grade) 0.850 7784-26-1
MgCl2·6H2O 117 80 168.6 0.6 112.0 39.6 (purity = 98%) 0.390 7791-18-6

a: * denotes the anhydrous salt; the prices of analytical reagent grade and other grades of salt hydrate PCMs were sourced as of November 2023 from https://www.aladdin-e.com/ and http://www.macklin.cn/, while the prices of industrial-grade salt hydrate PCMs were obtained as of November 2023 from https://www.1688.com/.

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