Efficient designs of double-pass curved solar air heaters

被引：27
作者：
Kumar, Amit [1 ]
Akshayveer [1 ]
Singh, Ajeet Pratap [1 ]
Singh, O. P. [1 ]
机构：
[1] IIT BHU, Dept Mech Engn, Varanasi 221005, Uttar Pradesh, India
来源：
RENEWABLE ENERGY | 2020年 / 160卷
关键词：
Curved solar air heater; Double-pass; Computational fluid dynamics; Relative roughness ratio; Nusselt number; THERMOHYDRAULIC PERFORMANCE ENHANCEMENT; THERMAL PERFORMANCE; COLLECTOR EFFICIENCY; FLOW; FLAT; PLATE; FINS; ENERGY;
D O I：
10.1016/j.renene.2020.06.115
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Recent research has shown that flat plate double-pass solar air heaters (DPSAH) exhibit higher thermal performance compared to conventional flat plate single-pass solar air heaters (SPSAH). However, scientific literature on design and performance evaluation of a curved DPSAH is scarce. In this paper, we systematically investigated various designs of DPSAH and reported its performance characteristics using a validated numerical model. Higher outlet air temperature by about 5 degrees C was observed when the DPSAH absorber plate is located at the mid of the insulating wall and transparent glass cover. Furthermore, putting asymmetric semi-circular roughened surfaces shows better performance than symmetric circular shapes as the reattachment of vortices with the absorber plate is more frequent in the former case. Two new correlations were developed for Nusselt number (Nu) and friction factor (f) as a function of Reynolds number (Re) and relative roughness height (d/H). The values of Nu and f obtained from the developed correlations agree well with data from the model. (C) 2020 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1105 / 1118
页数：14
相关论文
共 41 条
[1]   CFD evaluation of pressure drop across a 3-D filter housing for industrial gas turbine plants [J].
Abam, Fidelis I. ;
Effiom, Samuel O. ;
Ohunakin, Olayinka S. .
FRONTIERS IN ENERGY, 2016, 10 (02) :192-202
[2]   PERFORMANCE ANALYSIS OF SOLAR AIR HEATERS OF CONVENTIONAL DESIGN [J].
BIONDI, P ;
CICALA, L ;
FARINA, G .
SOLAR ENERGY, 1988, 41 (01) :101-107
[3]   Analysis of heat transfer augmentation and flow characteristics due to rib roughness over absorber plate of a solar air heater [J].
Chaube, A ;
Sahoo, PK ;
Solanki, SC .
RENEWABLE ENERGY, 2006, 31 (03) :317-331
[4]   A SOLAR AIR HEATER FOR LOW-TEMPERATURE APPLICATIONS [J].
CHOUDHURY, C ;
ANDERSEN, SL ;
REKSTAD, J .
SOLAR ENERGY, 1988, 40 (04) :335-343
[5]   Investigations on thermal performance characteristics of wire screen packed bed solar air heater [J].
Chouksey, Vimal Ku ;
Sharma, S. P. .
SOLAR ENERGY, 2016, 132 :591-605
[6]   Numerical model of an inflatable solar collector [J].
de Oliveira, Raphael Nunes ;
Rodrigues Filho, Fernando Antonio ;
Garcia Pabon, Juan Jose ;
Nassar Koury, Ricardo Nicolau ;
Machado, Luiz .
DRYING TECHNOLOGY, 2017, 35 (14) :1733-1741
[7]   An analytical model to predict the thermal performance of a novel parallel flow packed bed solar air heater [J].
Dhiman, Prashant ;
Thakur, N. S. ;
Kumar, Anoop ;
Singh, Satyender .
APPLIED ENERGY, 2011, 88 (06) :2157-2167
[8]   Investigation of thermal performance of-double pass-flat and v-corrugated plate solar air heaters [J].
El-Sebaii, A. A. ;
Aboul-Enein, S. ;
Ramadan, M. R. I. ;
Shalaby, S. M. ;
Moharram, B. M. .
ENERGY, 2011, 36 (02) :1076-1086
[9]   Thermal performance investigation of double pass-finned plate solar air heater [J].
El-Sebaii, A. A. ;
Aboul-Enein, S. ;
Ramadan, M. R. I. ;
Shalaby, S. M. ;
Moharram, B. M. .
APPLIED ENERGY, 2011, 88 (05) :1727-1739
[10]   Experimental energy and exergy analysis of a double-flow solar air heater having different obstacles on absorber plates [J].
Esen, Hikmet .
BUILDING AND ENVIRONMENT, 2008, 43 (06) :1046-1054
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