Thermal and thermohydraulic performance of counter and parallel flow packed bed solar air heaters

Dhiman, Prashant; Thakur, Narendra Singh; Chauhan, S.R.

doi:10.1016/j.renene.2012.03.032

Cited by 84 publications

(44 citation statements)

References 20 publications

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“…Because of division of inlet air into two air stream, thermal extraction is more than that of single flow SAH. The parallel flow system achieved 10% higher thermohydraulic efficiency (Dhiman et al, 2012).…”

Section: Introductionmentioning

confidence: 94%

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Correlations for Double Flow Double Pass SAH with Smooth Absorber Plate

2011

International Journal of Current Engineering and Technology

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Section: Introductionmentioning

confidence: 94%

“…In this arrangement, air gets in contact with absorber plate from both sides which contribute in more extraction of heat from absorber plate. Inlet air is divided into two streams and it is allowed to flow above and below the absorber plate (Dhiman et al, 2012). Flow arrangement of double flow-double pass SAH is shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Correlations for Double Flow Double Pass SAH with Smooth Absorber Plate

2011

International Journal of Current Engineering and Technology

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“…Metallic screen or other solid material forming packed bed in the heater flow passages has been used as heat absorbing material for solar radiations and the absorbed heat energy is transferred to the air that flows through the bed. The detailed information about several experimental works on packed bed solar energy storage systems with various geometrical parameters can be found in references [8][9][10][11][12][13][14][15][16][17] . In SAH systems the low density of air makes it impractical to store the heated air itself.…”

Section: -7)mentioning

confidence: 99%

“…After losing heat in the room again, room air comes to the bottom of the bed and the cycle is repeated. Charging and discharging process of the bed never takes place simultaneously [6][7][8]10) .…”

Section: -7)mentioning

confidence: 99%

Mathematical Simulation on Thermal Performance of Packed Bed Solar Energy Storage System

Kumar¹,

Kim²

2015

Transactions of the Korean hydrogen and new energy society

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>> Solar air heaters (SAHs) are simple in design and widely used for solar energy collection devices, and a packed bed is one of typical solar energy storage systems of thermal energy captured by SAHs. This paper presents mathematical modeling and simulation on the thermal performance of various packed bed energy storage systems. A MATLAB program is used to estimate the thermal efficiency of packed bed SAH. Among the various packed bed energy storage systems considered, the wire mesh screen packed bed SAH shows the best thermal efficiency over the entire range of design conditions. The maximum of thermal efficiency of packed bed SAH with wire mesh screen matrices has been found to be 0.794 for Re=2000 -20000 and ΔT/I=0.002 -0.02.

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“…It has also been found that the present correlations show much better agreement as compared to the values predicted by earlier correlations for such systems, it substantiates that the thermo-hydraulic performance of a solar air heater is a strong function of mass flow rate, geometrical parameters and porosity of the wire mesh screen. Table 1 Recent work on packed bed solar air heaters [21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%