Investigation of heat transfer and friction characteristics of packed bed solar air heater using wire mesh as packing material

Prasad, Shashi Bhushan; Saini, J.S.; Singh, Krishna M.

doi:10.1016/j.solener.2008.11.011

Cited by 109 publications

(65 citation statements)

References 12 publications

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“…Similar type of experimental investigations on wire mesh screen were reported by Thakur et al [26] and Prasad et al [27] for different porosities range i.e. 0.667 to 0.880 and 0.599 to 0.816 respectively.…”

Section: Introductionsupporting

confidence: 79%

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Performance analysis of optically semi-transparent material packed-bed solar air heater

Chouksey

Sharma

2017

International Journal of Thermodynamics

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This paper deals with theoretical analysis of performance of solar air collector having its duct packed with optically semitransparent materials. The heat transfer equations for two dimensional fully developed fluid flows under quasisteady state conditions have been developed in order to analyze the thermal, thermo-hydraulic and exergy performance and to study the effect of system and operating parameters. A computer programme is developed in C ++ language to estimate the temperature rise of entering air for evaluation of performance by solving the governing equations numerically using relevant correlations for heat transfer coefficient for packed bed systems. Results of air temperature rise and thermal efficiency obtained from the analysis have been compared with available experimental results and results are found fairly in closed agreement. It has been found that there is considerable enhancement in thermal efficiency with packed bed collector. Effect of total bed depth on efficiency show that there is an upper limiting value of total bed depth beyond which the thermal efficiency begins to fall again and this type of characteristics behavior is observed at all mass flow rate. It is also noticed that there exists an optimal value of effective and exergy efficiencies for a given mass flow rate.

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Section: Introductionsupporting

confidence: 79%

“…The following non-dimensional parameters are introduced in order to normalize the above equations: (21) to (27) can be rewritten as follows:…”

Section: Heat Transfer Equationsmentioning

confidence: 99%

Performance analysis of optically semi-transparent material packed-bed solar air heater

Chouksey

Sharma

2017

International Journal of Thermodynamics

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“…This is the value and originality of the present device. The power consumption increment for the wire mesh packed devices IP (PS and PW single-pass and double-pass devices, respectively) is defined by the percentage increase in the power consumption compared to that in the downward single-pass device [18,19]:…”

Section: Resultsmentioning

confidence: 99%

“…It is of practical importance that applications of recycling operation and wire mesh packing for enhancing device performance of wire mesh packed solar air heaters is technically and economically feasible. The power consumption increment for the wire mesh packed devices I P (P S and P W single-pass and double-pass devices, respectively) is defined by the percentage increase in the power consumption compared to that in the downward single-pass device [18,19]:…”

Section: Resultsmentioning

confidence: 99%

Device Performance Improvement of Double-Pass Wire Mesh Packed Solar Air Heaters under Recycling Operation Conditions

Chang

Lin

et al. 2016

Energies

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Abstract:The improvement of device performance of a recycling solar air heater featuring a wire mesh packing was investigated experimentally and theoretically. The application of the wire mesh packing and recycle-effect concept to the present study were proposed aiming to strengthen the convective heat-transfer coefficient due to increased turbulence. Comparisons were made among different designs, including the single-pass, flat-plate double-pass and recycling double-pass wire mesh packed operations. The collector efficiency of the recycling double-pass wire mesh packed solar air heater was much higher than that of the other configurations for various recycle ratios and mass flow rates scenarios. The power consumption increment due to implementing wire mesh in solar air heaters was also discussed considering the economic feasibility. A fairly good agreement between theoretical predictions and experimental measurements was achieved with an analyzed error of 1.07%-9.32%.

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“…The results were ensured by an unsteady state model. In addition, using steel wire mesh as beds showed good enhancements in the SAHs performance [37,38]. Also, the metal corrugated packing SAH was ensured to be more appropriate for using in the cold regions rural buildings for its advantages of large heat transfer area, high heat transfer coefficient and good economic performance as studied by Zheng et al [39].…”

Section: Introductionmentioning

confidence: 93%

Influence of bladed and glazed entrance on the performance of solar air heaters

et al. 2018

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The performance of a flat plate single-pass Solar Air Heater (SAH) modified at the entrance region was experimentally investigated. This entrance region was covered with glass cover instead of steel. Using glass at the entrance region increases the heating area exposed to solar radiation and avoids the restriction of solar radiation from reaching this area as in case of steel cover. Also, guide blades were placed in the entrance region to ensure well air distribution on the absorber surface and hence enhancing the thermal performance of SAH. The modified SAH was compared with another of conventional entrance. The experiments were performed at four air flow rates ranged from 0.013 to 0.04 kg/s. The modifications led to good enhancement in both the air temperature difference and the efficiency. For the daily efficiency, the maximum values are 43.43, 40.48 and 32.92 % for the glazed-bladed entrance SAH, glazed entrance SAH and conventional SAH, respectively, at the rate of 0.04 kg/s. The glazed-bladed SAH showed a good improvement in the daily thermal efficiency by 6.72 to 10.5 % over the conventional heater and by 2.16 to 3.25 % over the glazed SAH.

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Investigation of heat transfer and friction characteristics of packed bed solar air heater using wire mesh as packing material

Cited by 109 publications

References 12 publications

Performance analysis of optically semi-transparent material packed-bed solar air heater

Performance analysis of optically semi-transparent material packed-bed solar air heater

Device Performance Improvement of Double-Pass Wire Mesh Packed Solar Air Heaters under Recycling Operation Conditions

Influence of bladed and glazed entrance on the performance of solar air heaters

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