Analytical expression for electrical efficiency of PV/T hybrid air collector

Dubey, Swapnil; Sandhu, Gurvisha; Tiwari, G.N.

doi:10.1016/j.apenergy.2008.09.003

Cited by 256 publications

(61 citation statements)

References 26 publications

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“…It was found that Jodhpur has highest thermal energy and exergy gain as solar radiation of Jodhpur is highest and cost/kWh for climate conditions of Jodhpur is also most economical. Dubey et al [10] studied the electrical efficiency of glazed PVT air collector for the glass to glass and glass to tedlar with and without air duct. It was found from the analytical study that glass to glass PV module yields highest electrical efficiency.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Single Glazed Solar PVT Air Collector in the Climatic Condition of NE India

Das

Rezaie

Jha

et al. 2017

The 4th International Electronic Conference on Entropy and Its Applications

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Abstract:With the rapid depletion of fossils fuels, opportunities for renewable energy including solar energy are endless. The efficiency of photovoltaic cells to convert the solar energy into electricity drops with the rise in temperature due to increased resistance. Thus, improving the efficiency by lowering the thermal resistance and allowing the cooling fluid (air/water) to flow through photovoltaic thermal (PVT) system is an attractive option. Climate condition based performance of any PVT system varies location wise, and cannot be generalized. Silchar is a city located in Himalayan region has tropical climatic conditions and most of its decentralized villages are out of grid connectivity. Unlike other metro cities of India, PVT will play a critical role for the development of theses villages. Keeping this in mind an attempt is made in the present study to perform an analysis of single glazed solar PVT air collector on the basis of energy and exergy for the climatic conditions of Silchar, India. An analytical model is developed to evaluate the hourly variation of PV cell temperature, cell efficiency, useful thermal heat gain, useful electrical heat gain, energy efficiency and exergy efficiency PVT system. Results depict that efficiency of PV cell decreases with the increase in temperature, and a maximum efficiency of 14.6% for the PV module is found. Out of total useful heat output, the thermal heat output contributes 60.7% while the rest is electrical heat output. Further, magnitude of the heat output is found to increase with the solar radiation and the maximum observed solar ray at around 12:30 h. Trend of both energy and exergy efficiency is similar except the magnitude. Maximum efficiency observed to be 83% and 16.5% for energy and exergy, respectively.

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Section: Introductionmentioning

confidence: 99%

Performance Analysis of Single Glazed Solar PVT Air Collector in the Climatic Condition of NE India

Das

Rezaie

Jha

et al. 2017

The 4th International Electronic Conference on Entropy and Its Applications

View full text Add to dashboard Cite

show abstract

“…The same effect has been observed for all the PV module technologies. Dubey et al studied the module efficiencies of only c-Si-based semitransparent and opaque modules [11] and observed the similar results. It is important to note that in the case of c-Si and poly c-Si PV modules, the packing factor is considered to be 0.89.…”

Section: Resultsmentioning

confidence: 71%

“…The designed parameters, for both laboratory made and commercially available PV modules, used for calculations have been tabulated in Table 2. The corresponding references for the values of different parameters have been given in the table, and the values of rest of the parameters have been taken from [11].…”

Section: Methodsmentioning

confidence: 99%

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Performance of Photovoltaic Modules of Different Solar Cells

Gaur

Tiwari

2013

Journal of Solar Energy

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In this paper, an attempt of performance evaluation of semitransparent and opaque photovoltaic (PV) modules of different generation solar cells, having the maximum efficiencies reported in the literature at standard test conditions (STC), has been carried out particularly for the months of January and June. The outdoor performance is also evaluated for the commercially available semitransparent and opaque PV modules. Annual electrical energy, capitalized cost, annualized uniform cost (unacost), and cost per unit electrical energy for both types of solar modules, namely, semitransparent and opaque have also been computed along with their characteristics curves. Semitransparent PV modules have shown higher efficiencies compared to the opaque ones. Calculations show that for the PV modules made in laboratory, CdTe exhibits the maximum annual electrical energy generation resulting into minimum cost per unit electrical energy, whereas a-Si/nc-Si possesses the maximum annual electrical energy generation giving minimum cost per unit electrical energy when commercially available solar modules are concerned. CIGS has shown the lowest capitalized cost over all other PV technologies.

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“…Interest in zero energy building and green buildings and the possibility of integrating PVT systems into buildings and environmental concerns prompt us to use the PVT system. Dubey et al [13,14] developed an expression for the electrical efficiency of the PVT module of PVT air collectors as a function of climatic and design extracted by a 12V DC fan provided at the outlet of air heater. It is operated by the electricity generated from the PV module.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of PVT Mixed Mode Dryer with Load Condition

Tiwari¹

2017

J Fundam Renewable Energy Appl

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In this communication, an attempt has been made to evaluate the performance of mixed mode dryer consists of PVT air collectors and wooden made drying chamber with load condition. Based on energy balances of PVT air collectors and conventional collector, an expression for outlet air temperature of PVT air collector has been derived. Further by using the rate of thermal energy available from PVT air collector, an analytical expression for crop temperatures has also been derived in terms of design and climatic parameters of New Delhi and experimentally validated. The validation of analytical model has been carried out for cauliflower with thin layer drying for last day of drying with reasonable assumptions. It has been observed that the drying time for a half kilogram of cauliflower is achieved in 21 hours due to larger size of the samples. The annual overall thermal energy and exergy were 396.48 kWh and 46.52 kWh respectively. The energy payback time (EPBT) was increased from 3.17 years on thermal energy basis to 27.03 years on exergy basis for mixed mode dryer. The energy production factor and life cycle conversion efficiency were found to be smaller on exergy basis compared to thermal energy basis. For a life time of 30 year the carbon credits earned on overall thermal energy basis was $ 727.9 and on overall exergy basis it was $ 85.5.

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Analytical expression for electrical efficiency of PV/T hybrid air collector

Cited by 256 publications

References 26 publications

Performance Analysis of Single Glazed Solar PVT Air Collector in the Climatic Condition of NE India

Performance Analysis of Single Glazed Solar PVT Air Collector in the Climatic Condition of NE India

Performance of Photovoltaic Modules of Different Solar Cells

Performance Evaluation of PVT Mixed Mode Dryer with Load Condition

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