Solidification in heat packs: I. Nucleation rate

被引：34

作者：

Rogerson, MA ^{[1
]}

Cardoso, SSS ^{[1
]}

机构：

[1] Univ Cambridge, Dept Chem Engn, Cambridge CB2 3RA, England

来源：

AICHE JOURNAL | 2003年 / 49卷 / 02期

关键词：

D O I：

10.1002/aic.690490220

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The solidification of sodium acetate trihydrate in a commercial heat pack is investigated in a series of three articles. In the first work, the classic nucleation theory is used to predict the range of temperatures and pressures for which a subcooled solution of sodium acetate solidifies spontaneously. The nucleation temperature was determined experimentally and it was shown that it is insensitive to concentration, at atmospheric pressure. Using the theoretical results for high pressure and the experimental measurements at atmospheric pressure, an equation for the nucleation temperature was derived as a function of pressure. This relation takes into account heterogeneous nucleation on ever-present impurities suspended in the solution.

引用

页码：505 / 515

页数：11

共 21 条

[11] AN EXPERIMENTAL DETERMINATION OF SURFACE ENERGIES OF ICE [J].

KETCHAM, WM ;

HOBBS, PV .

PHILOSOPHICAL MAGAZINE, 1969, 19 (162) :1161-&

[12]

Kurz W., 1986, FUNDAMENTALS SOLIDIF

[13]

LIDE DR, 1996, CRC HDB CHEM PHYSICS

[14] HOMOGENEOUS NUCLEATION - THEORY AND EXPERIMENT [J].

OXTOBY, DW .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1992, 4 (38) :7627-7650

[15]

SANDLER SI, 1998, CHEM ENG THERMODYNAM

[16] APPROXIMATION OF THE FREE-ENERGY CHANGE ON CRYSTALLIZATION [J].

THOMPSON, CV ;

SPAEPEN, F .

ACTA METALLURGICA, 1979, 27 (12) :1855-1859

[17] INVESTIGATIONS OF SODIUM-ACETATE TRIHYDRATE FOR SOLAR LATENT-HEAT STORAGE, CONTROLLING THE MELTING-POINT [J].

ULMAN, A ;

VALENTIN, B .

SOLAR ENERGY MATERIALS, 1983, 9 (02) :177-181

[18]

Volmer M, 1926, Z PHYS CHEM-STOCH VE, V119, P277

[19] STUDIES ON SALT HYDRATE FOR LATENT-HEAT STORAGE .1. CRYSTAL NUCLEATION OF SODIUM-ACETATE TRIHYDRATE CATALYZED BY TETRASODIUM PYROPHOSPHATE DECAHYDRATE [J].

WADA, T ;

YAMAMOTO, R .

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1982, 55 (11) :3603-3606

[20]

Walton A.G., 1969, NUCLEATION, P241

← 1 2 3 →