Dynamic simulation and parametric sensitivity studies on a flat-plate solar collector

Wolf, D.; Kudish, A.I.; Sembira, A.N.

doi:10.1016/0360-5442(81)90077-3

Cited by 8 publications

(3 citation statements)

References 6 publications

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“…The sky temperature T s is computed from the ambient air temperature T a by the relation [Eq. (9)] mentioned by Gao et al, [15] Swinbank [22] and cited by Hamed et al [23] and Wolf et al [24] T…”

Section: Solar Collector Modelingmentioning

confidence: 99%

Distributed mathematical model supporting design and construction of solar collectors for drying

et al. 2017

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Coupled partial differential equations were developed to investigate which collector lengths are appropriate for drying and adsorbent regeneration under prevailing Ghanaian weather. Unlike approaches based on empirical data, the numerical model is more flexible. Effects of operational and design variables on outlet temperature and performance were systematically studied. Collector length and air speed affect performance indicators. Operational overall heat loss coefficient, an important characteristic of the collector, is not constant but varies during the day. With plausible physical parameters, the model describes the experimental data well. Collector lengths of 1.5 and 4.5 m suited drying and regeneration, respectively.

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Section: Solar Collector Modelingmentioning

confidence: 99%

Distributed mathematical model supporting design and construction of solar collectors for drying

et al. 2017

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“…Flat-plate solar collector modular designs for Domestic Hot Water (DHW) and innovative solar collector type designs for space heating in buildings or other applications are techno-economically attractive and effective for energy savings and green buildings, as argued in the scientific articles in [1].The performance of solar collectors, especially the flat-plate ones, has been investigated so far by many researchers, starting with the classical works [2][3][4][5][6], then proceeding to further investigations on various parameters in order to improve the solar collector design and performance, [7][8][9][10][11] and finally reaching to more detailed experimental and theoretical investigations with sophisticated simulation models [12][13][14][15][16][17][18]. The efforts to increase the solar collector gain and its efficiency are continuous [19][20][21][22][23] and focus on the reduction of the U L coefficient and the increase of the ratio α/ε p which in turn affects U L , too, as one moves from conventional absorbing surfaces to selective ones [12].…”

Section: Introductionmentioning

confidence: 99%

An Effective Simulation Model to Predict and Optimize the Performance of Single and Double Glaze Flat - Plate Solar Collector Designs

Kaplanis¹,

Kaplani²

2012

JESTR

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This paper outlines and formulates a compact and effective simulation model, which predicts the performance of single and double glaze flat-plate collector. The model uses an elaborated iterative simulation algorithm and provides the collector top losses, the glass covers temperatures, the collector absorber temperature, the collector fluid outlet temperature, the system efficiency, and the thermal gain for any operational and environmental conditions. It is a numerical approach based on simultaneous guesses for the three temperatures, T p plate collector temperature and the temperatures of the two glass covers T g1 , T g2 . A set of energy balance equations is developed which allows for structured iteration modes whose results converge very fast and provide the values of any quantity which concerns the steady state performance profile of any flat-plate collector design. Comparison of the results obtained by this model for flat-plate collectors, single or double glaze, with those obtained by using the Klein formula, as well as the results provided by other researchers, is presented.. 2 1 g g h − convective heat transfer coefficient between the inner and outer glass cover (W

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“…The sky temperature z p is computed from the ambient air temperature z by the relation (Eq. 9) mentioned by Gao et al (2007), Swinbank (1963) and cited by Hamed et al (2014) and Wolf et al (1981).…”

Section: Solar Collector Modelingmentioning

confidence: 99%

Drying of yam with solar adsorption system

Amankwah

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The experimental equilibrium moisture content of yam (Dioscorea rotundata; cultivar: Dente) at temperatures of 25°C and 50°C were determined at relative humidity from 0% to 95% employing the dynamic vapor sorption analyzer. Wet yam samples with about 68% initial moisture content were used, first for desorption and subsequently for sorption. Water activity decreased with increased temperature at constant equilibrium moisture content. The desorption and adsorption isotherms were fitted by the Guggenheim-Anderson-de Boer (GAB), Henderson, Halsey, Oswin, Smith, Brunauer-Emmett-Teller (BET) and Peleg models. On the basis of the fit the Peleg, GAB and Oswin models were most suitable for describing the observed data. When the focus is on drying, the GAB (3 parameters) and empirical Peleg model (4 parameters) performed best. Of these, GAB is preferable because it has fewer parameters, which, moreover, have a physical meaning. .

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Dynamic simulation and parametric sensitivity studies on a flat-plate solar collector

Cited by 8 publications

References 6 publications

Distributed mathematical model supporting design and construction of solar collectors for drying

Distributed mathematical model supporting design and construction of solar collectors for drying

An Effective Simulation Model to Predict and Optimize the Performance of Single and Double Glaze Flat - Plate Solar Collector Designs

Drying of yam with solar adsorption system

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