Thermo-physical characterization of some paraffins used as phase change materials for thermal energy storage

被引:49
作者
Anghel, E. M. [1 ]
Georgiev, A. [2 ]
Petrescu, S. [1 ]
Popov, R. [3 ]
Constantinescu, M. [1 ]
机构
[1] Romanian Acad, Inst Phys Chem Ilie Murgulescu, Bucharest 060021, Romania
[2] Tech Univ Sofia, Branch Plovdiv, Dept Mech, Plovdiv, Bulgaria
[3] Tech Univ Sofia, Branch Plovdiv, Dept Optoelect & Laser Engn, Plovdiv, Bulgaria
关键词
Latent heat storage; Phase change material; Raman spectroscopy; DSC; Paraffin; Composite; THERMODYNAMIC PROPERTIES; NORMAL-ALKANES; COMPOSITE; PCM; BUILDINGS; BEHAVIOR; WAXES;
D O I
10.1007/s10973-014-3775-6
中图分类号
O414.1 [热力学];
学科分类号
摘要
Three phase change paraffinic materials (PCMs) were thermophysically (phase-transition temperatures, latent heat, heat capacity at constant pressure, density, and thermal conductivity) investigated in order to be used as latent heat storage media in a pilot plant developed in Plovdiv Bulgaria. Raman structural investigation probes aliphatic character of the E53 sample, while the E46 and ECP samples contain also unsaturated components due to their Raman features within 1,500-1,700 cm(-1) range. Orthorhombic structure of the three PCMs was evidenced by the Raman modes at the 1,417 cm(-1). The highest latent heat value, Delta H, of phase transitions among the three materials was represented by summation of a solid order-disorder, and melting latent heat was encountered by the E53 paraffin, i.e., 194.32 J g(-1) during a mu-DSC scan of 1 A degrees C min(-1). Conversely, the ECP composite containing ceresin component shows the lowest latent heat value of 143.89 J g(-1) and the highest thermal conductivity of 0.46 W m(-1) K-1 among the three phase change materials (PCMs). More facile melt-disordered solid transition with the activation energy of 525.45 kJ mol(-1) than the lower temperature transition of disorder-order (E (a) of 631.73 kJ mol(-1)) during the two-step process of solidification for the E53 melt are discussed in terms of structural and molecular motion changes.
引用
收藏
页码:557 / 566
页数:10
相关论文
共 38 条
[1]   CONFORMATIONAL DEPENDENCE OF FERMI RESONANCES IN NORMAL-ALKANES - RAMAN-SPECTRA OF 1,1,1,4,4,4-HEXADEUTERIOBUTANE [J].
ABBATE, S ;
WUNDER, SL ;
ZERBI, G .
JOURNAL OF PHYSICAL CHEMISTRY, 1984, 88 (03) :593-600
[2]   Numerical and Experimental Study of Solidification in a Spherical Shell [J].
Assis, E. ;
Ziskind, G. ;
Letan, R. .
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 2009, 131 (02) :1-5
[3]   High-chain fatty acid esters of myristyl alcohol with even carbon number: Novel organic phase change materials for thermal energy storage-1 [J].
Aydin, Ahmet Alper ;
Okutan, Hasancan .
SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2011, 95 (10) :2752-2762
[4]   RAMAN SCATTERING IN CRYSTALLINE POLYETHYLENE [J].
BOERIO, FJ ;
KOENIG, JL .
JOURNAL OF CHEMICAL PHYSICS, 1970, 52 (07) :3425-&
[5]   Materials used as PCM in thermal energy storage in buildings: A review [J].
Cabeza, L. F. ;
Castell, A. ;
Barreneche, C. ;
de Gracia, A. ;
Fernandez, A. I. .
RENEWABLE & SUSTAINABLE ENERGY REVIEWS, 2011, 15 (03) :1675-1695
[6]   Latent heat nano composite building materials [J].
Constantinescu, M. ;
Dumitrache, L. ;
Constantinescu, D. ;
Anghel, E. M. ;
Popa, V. T. ;
Stoica, A. ;
Olteanu, M. .
EUROPEAN POLYMER JOURNAL, 2010, 46 (12) :2247-2254
[7]   Normal alkanes, multialkane synthetic model mixtures, and real petroleum waxes: Crystallographic structures, thermodynamic properties, and crystallization [J].
Dirand, M ;
Bouroukba, M ;
Chevallier, V ;
Petitjean, D ;
Behar, E ;
Ruffier-Meray, V .
JOURNAL OF CHEMICAL AND ENGINEERING DATA, 2002, 47 (02) :115-143
[8]   Fourier-transform Raman spectroscopic study of unsaturated and saturated waxes [J].
Edwards, HGM ;
Falk, MJP .
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 1997, 53 (14) :2685-2694
[9]   A review on phase change energy storage: materials and applications [J].
Farid, MM ;
Khudhair, AM ;
Razack, SAK ;
Al-Hallaj, S .
ENERGY CONVERSION AND MANAGEMENT, 2004, 45 (9-10) :1597-1615
[10]  
Fernandez AI, 2013, P 2 INT EN STOR C TR, P85