Optimal thermohydraulic performance of a wire mesh packed solar air heater

被引:109
作者
Mittal, M. K. [1 ]
Varshney, L. [1 ]
机构
[1] Govind Ballabh Pant Univ Agr & Technol, Coll Technol, Dept Mech Engn, Pantnagar 263145, Uttar Pradesh, India
关键词
solar air heater; packed bed; thermohydraulic performance; matrix; wire screen matrix;
D O I
10.1016/j.solener.2005.10.004
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 [动力工程及工程热物理]; 0820 [石油与天然气工程];
摘要
This paper is concerned with thermohydraulic investigations on a packed bed solar air heater having its duct packed with blackened wire screen matrices of different geometrical parameters (wire diameter and pitch). The thermohydraulic performance of an air heater in terms of effective efficiency is determined on the basis of actual thermal energy gain subtracted by the primary energy required to generate power needed for pumping air through the packed bed. Based on energy transfer mechanism in the bed, a mathematical model is developed to compute effective efficiency. A design criterion is also suggested to select a matrix for packing the air flow duct of a solar air heater which results in the best thermal efficiency with minimum pumping power penalty. Resulting values of effective efficiency clearly indicate that the packed bed solar air heater investigated is thermohydraulically efficient as compared to flat plate collectors. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1112 / 1120
页数:9
相关论文
共 16 条
[1]
Thermohydraulic performance of packed-bed solar air heaters [J].
Ahmad, A ;
Saini, JS ;
Varma, HK .
ENERGY CONVERSION AND MANAGEMENT, 1996, 37 (02) :205-214
[2]
BECKMAN WA, 1968, AICHE J, V4, P69
[3]
Cheema L. S., 1979, P I S E S SILV JUB C, V1, P259
[4]
A SLIT-AND-EXPANDED ALUMINUM-FOIL MATRIX SOLAR COLLECTOR [J].
CHIOU, JP ;
ELWAKIL, MM ;
DUFFIE, JA .
SOLAR ENERGY, 1965, 9 (02) :73-&
[5]
COLLIER RK, 1979, P I S E S SILV JUBL, V1, P264
[6]
IMPROVEMENT OF THE EFFICIENCY OF A BARE SOLAR COLLECTOR BY MEANS OF TURBULENCE PROMOTERS [J].
CORTES, A ;
PIACENTINI, R .
APPLIED ENERGY, 1990, 36 (04) :253-261
[7]
THERMAL PERFORMANCE STUDY OF A SOLAR AIR HEATER WITH PACKED FLOW PASSAGE [J].
DEMIREL, Y ;
KUNC, S .
ENERGY CONVERSION AND MANAGEMENT, 1987, 27 (03) :317-325
[8]
MISHRA CB, 1981, INT J ENERGY, V6, P153
[9]
PRASAD RK, 1993, P 8 ISME C MECH ENG, P190
[10]
THERMAL PERFORMANCE OF PACKED-BED SOLAR AIR HEATERS [J].
SHARMA, SP ;
SAINI, JS ;
VARMA, HK .
SOLAR ENERGY, 1991, 47 (02) :59-67