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    Wyświetlanie 1-5 z 5
    Tytuł:
    Method of research for solar cookers performance characteristics- analysis and comparison
    Autorzy:
    Raghav, Geetanjali
    Sharma, Pankaj Kumar
    Kumar, Suresh
    Maithani, Rajesh
    Powiązania:
    https://bibliotekanauki.pl/articles/1833748.pdf
    Data publikacji:
    2021
    Wydawca:
    Centrum Badań i Innowacji Pro-Akademia
    Tematy:
    solar cookers
    cooking
    plate temperature
    thermal performance
    kuchenka słoneczna
    gotowanie
    wydajność cieplna
    Opis:
    Cooking is one of the most common activity in day-to-day life of every woman. In rural areas the transportation of fuel is major problem and the increasing demand of energy for cooking applications is gaining importance and various investigations are being carried out for performance enhancement of the solar cooker. The box-type solar cooker has a complex thermal analysis due to the transient heat transfer phenomenon involved in three dimensions. A comparison of the standard correlation available are analysed for accuracy of predicted results with experimental data. The investigation involves the experimental determination of the parameters viz. wind heat transfer coefficient, side and bottom loss coefficient, inner and outer glass temperature. The extensive data is analysed with that of standard correlations and the significance of the experimental data is checked. Analysis found to have deviation of 3%-20% in experimental and correlation data, which indicates that for accuracy of performance analysis the studied parameters should be determined experimentally.
    Źródło:
    Acta Innovations; 2021, 39; 54--66
    2300-5599
    Pojawia się w:
    Acta Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of solar cooker with thermal storage for remote hilly areas: determination of heating and cooling characteristic time
    Autorzy:
    Raghav, Geetanjali
    Sharma, Pankaj Kumar
    Kumar, Suresh
    Maithani, Rajesh
    Iung, Alexis
    Quentin, Mercier
    Powiązania:
    https://bibliotekanauki.pl/articles/2142896.pdf
    Data publikacji:
    2021
    Wydawca:
    Centrum Badań i Innowacji Pro-Akademia
    Tematy:
    solar energy
    solar cookers
    thermal storage
    thermal performance
    energia słoneczna
    kuchenka słoneczna
    magazynowanie ciepła
    wydajność cieplna
    Opis:
    Solar cooking finds a major application in rural areas of Uttarakhand, India, yet its utilization is still limited due to certain limitation such as intermittent nature of solar radiations. This drawback limits solar cooker in becoming a viable alternate solution of LPG and other pollution causing resources such as wood. In order to cater this problem a numerical analysis of box type solar cooker with storage is carried out. The energy stored in the storage material will keep the cooker warm up to the time when food is consumed. Charging and discharging time analysis is performed in with an aim to understand the effect of storage on solar cooker. Heating and cooling characteristic time are being evaluated and analysed with storage. Thermal performance of box type solar cooker is measured in terms of figures of merit according to BIS standards. The effect of storage has also been analysed in terms of charging and discharging time and first figure of merit of box type solar cooker.it has been observed that during discharging the heat is stored for more duration as compared to the charging time as discharge time is approx. 4-5 hours while charging time for the same amount of insolation is around 3-4 hours.
    Źródło:
    Acta Innovations; 2021, 40; 5-18
    2300-5599
    Pojawia się w:
    Acta Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Economic analysis of artificially roughened solar air heater with v-shaped ribs
    Autorzy:
    Bahuguna, Rahul
    Chamoli, Sunil
    Barthwal, Yogesh
    Rana, Sumit
    Gupta, Ashutosh
    Bisht, Vijay Singh
    Powiązania:
    https://bibliotekanauki.pl/articles/2142836.pdf
    Data publikacji:
    2022
    Wydawca:
    Centrum Badań i Innowacji Pro-Akademia
    Tematy:
    solar air heater
    heat transfer
    artificial roughness
    economic analysis
    life cycle savings
    powietrzny kolektor słoneczny
    wymiana ciepła
    sztuczna chropowatość
    analiza ekonomiczna
    oszczędności w cyklu życia
    Opis:
    Due to the minimal transfer of heat from absorber plate to moving air in the duct, solar air heaters have low performance. One of the procedures to augment the heat transfer by substantial amount is by utilizing artificial roughness, by which the performance can be improved considerably. In this study, an economic investigation of solar air heater embedded with artificial roughness is accomplished numerically employing v-shaped roughness, with the objective of optimising life cycle solar savings. The non-dimensional parameters of roughness, namely, angle of attack (α), roughness pitch (p/e) and roughness height (e/Dh) are examined by varying temperature rise over the solar air heater (∆T) and solar radiations (I) for different economic parameters values i.e., cost of collector, cost of roughness elements, and cost of conventional fuel.
    Źródło:
    Acta Innovations; 2022, 44; 18-33
    2300-5599
    Pojawia się w:
    Acta Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energetic & exergetic analysis of a parabolic trough: concentrated solar power plant
    Autorzy:
    Nagpal, Mohit
    Maithani, Rajesh
    Kumar, Suresh
    Powiązania:
    https://bibliotekanauki.pl/articles/2142893.pdf
    Data publikacji:
    2021
    Wydawca:
    Centrum Badań i Innowacji Pro-Akademia
    Tematy:
    solar energy
    exergy
    thermal efficiency
    heat gain
    heat losses
    parabolic trough
    collectors
    energia słoneczna
    egzergia
    wydajność termiczna
    zyski ciepła
    straty ciepła
    kolektory
    Opis:
    Solar energy is the most affordable source of energy. Parabolic trough systems are used to concentrate and extract heat, therefore it’s very significant to analyse its performance in terms of energy and exergy. Exergy based analysis of the system ensures the eradication of losses, resulting in the yield of energy of the highest quality. In this paper, an investigation has been carried out using numerical simulation with an objective of analysis of Parabolic Trough Collectors on the basis of energy and exergy. Detailed second law analysis has been performed by varying the system and operating parameters through computer simulation. Exergy output has been determined by analysing the effect of major system parameters, namely, mirror reflectivity, glass transmissivity, absorptivity, the diameter of glass envelop, and the receiver. The operating parameters considered in the investigation are insolation and temperature rise parameters. The extensive investigation of the parabolic trough of a concentrated solar power plant for various design parameters in the range of operating parameters reveals that it is beneficial to operate the system at higher temperature as opposed to the preference of the operating system at lower temperature from purely thermal considerations.
    Źródło:
    Acta Innovations; 2021, 40; 19-30
    2300-5599
    Pojawia się w:
    Acta Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tests and theoretical analysis of a PVT hybrid collector operating under various insolation conditions
    Autorzy:
    Sawicka-Chudy, P.
    Sibiński, M.
    Cholewa, M.
    Klein, M.
    Znajdek, K.
    Cenian, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/105640.pdf
    Data publikacji:
    2018
    Wydawca:
    Centrum Badań i Innowacji Pro-Akademia
    Tematy:
    conversion of solar energy
    photovoltaics
    Silicon solar cells
    PVT collector
    konwersja energii słonecznej
    fotowoltaika
    krzemowe ogniwa słoneczne
    Opis:
    The main goal of the study was to investigate the relationship between the orientation of the PVT (PhotoVoltaic Thermal) collector and the thermal and electric power generated. Extensive research was performed to find optimal tilt angles for hybrid solar thermal collectors, which combine photovoltaic as well as thermal collection in a single unit, known as PVT (PhotoVoltaic Thermal) modules for an office building with working hours between 7.00 and 16.00. The comprehensive study included field measurements of the modules in central Poland and tests under AM (air mass) 1.5 conditions in a certified laboratory KEZO (Centre for Energy Conversion and Renewable Resources) Polish Academy of Sciences in Jablonna. Furthermore, a PVT system was investigated using the simulation method based on the dedicated Polysun software. The PV characteristics and efficiency of the PV module and the relation between power or efficiency of the PVT module and incidence angle of solar-irradiance were studied. Optimal work conditions for commercial PVT modules were ascertained. In addition, it was found that the maximum efficiencies of PV module (ηPV), solar thermal-collector (ηc) and PVT hybrid collector (ηPVT) registered under field conditions were higher than the ones measured under laboratory conditions.
    Źródło:
    Acta Innovations; 2018, 26; 62-74
    2300-5599
    Pojawia się w:
    Acta Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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