Initial analysis of PCM integrated solar collectors

被引:40
作者
Alva, L. H. S.
Gonzalez, J. E. [1 ]
Dukhan, N.
机构
[1] Univ Puerto Rico, Dept Mech Engn, Mayaguez, PR 00681 USA
[2] Santa Clara Univ, Dept Mech Engn, Santa Clara, CA 95053 USA
[3] Univ Puerto Rico, Dept Mech Engn, Mayaguez, PR 00681 USA
来源
JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME | 2006年 / 128卷 / 02期
关键词
PCM; solar; thermal; collectors; storage; lumped; enthalpy;
D O I
10.1115/1.2188532
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
This paper investigates the technical feasibility of innovative solar collectors. The proposed collectors have a phase change material (PCM) integrated into them as the storage mechanism. The PCM-integrated solar collector eliminates the need of conventional storage tanks, thus reducing cost and space. The present work uses a paraffin-graphite composite as the PCM to increase the conductivity of the PCM matrix. The paraffin's melting point is around 89 degrees C, which is appropriate for use in single-effect absorption systems. The mathematical model that describes the thermal process in the PCM is presented and differs from the analysis of conventional flat plate solar collectors making use of the lumped capacitance method which neglects spatial variations. The proposed model is calibrated favorably with a more detailed mathematical model that uses finite differences and considers temporal and spatial variations. Results for the collectors' thermal performance are presented along with the effects of the composition of the PCM. The results for the PCM integrated collector proposed here, are very encouraging. Therefore, there is an indication that conventional storage tanks may be replaced for the PCM integrated in the solar collector.
引用
收藏
页码:173 / 177
页数:5
相关论文
共 9 条
[1]  
Alexiades V., 1993, Mathematical Modeling of Melting and Freezing Processes, DOI 10.1201/9780203749449
[2]   Simulation of an air-cooled solar-assisted absorption air conditioning system [J].
Alva, LH ;
González, JE .
JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME, 2002, 124 (03) :276-282
[3]   PERFORMANCE EQUATIONS OF A COLLECTOR CUM STORAGE-SYSTEM USING PHASE-CHANGE MATERIALS [J].
BANSAL, NK ;
BUDDHI, D .
SOLAR ENERGY, 1992, 48 (03) :185-194
[4]  
Duffie J.A., 2006, SOLAR ENG THERMAL PR, VThird
[5]   PERFORMANCE AND MODELING OF LATENT-HEAT STORES [J].
HOOGENDOORN, CJ ;
BART, GCJ .
SOLAR ENERGY, 1992, 48 (01) :53-58
[6]  
Incropera F.P., 1990, FUNDAMENTALS HEAT MA
[7]   Paraffin/porous-graphite-matrix composite as a high and constant power thermal storage material [J].
Py, X ;
Olives, R ;
Mauran, S .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2001, 44 (14) :2727-2737
[8]   Integrated solar collector storage system based on a salt-hydrate phase-change material [J].
Rabin, Y ;
BarNiv, I ;
Korin, E ;
Mikic, B .
SOLAR ENERGY, 1995, 55 (06) :435-444
[9]   PERFORMANCE INDICATORS FOR SOLAR PIPES WITH PHASE-CHANGE STORAGE [J].
SOKOLOV, M ;
KEIZMAN, Y .
SOLAR ENERGY, 1991, 47 (05) :339-346