Thermal analysis on a cascaded solar collector using nanofluid

2020 ◽  
Author(s):  
Devaraj Rangabashiam ◽  
S. Ramachandran ◽  
S. S. Rajesh ◽  
A. Ramkumar ◽  
Hemanandh Janarthanam
Keyword(s):  
Thermal Analysis ◽  
Solar Collector

Thermal Analysis of the Solar Collector Cum Storage System Using a Hybrid-Nanofluids

2021 ◽  
Vol 10 (4) ◽  
pp. 616-626
Author(s):  
Kawthar Dhif ◽  
F. Mebarek-Oudina ◽  
S. Chouf ◽  
H. Vaidya ◽  
Ali J. Chamkha
Keyword(s):  
Thermal Analysis ◽  
Steady State ◽  
Solar Collector ◽  
Heat Storage ◽  
Storage System ◽  
Stored Energy ◽  
Salt Mixture ◽  
Energy Field ◽  
Hybrid Nanofluids ◽  
Flat Plate Collector

The main problem in the solar energy field is the storage of thermal energy. To divert this problem, it was suggested to use a flat-plat solar collector which also serves as a storage system; this solution will reduce the size of a refrigerating machine that we are studying. A high stored energy density is only possible if we through use latent heat of phase change. Thermal analysis has been developed for this type of storage collector for near-steady state conditions using a nanofluid heat storage substance depended on KNO3–NaNO3 binary salt mixture as PCM and a mix of Al2O3–SiO2 as nanoparticle, from which the new Hottel-Whillier-Bliss equations have been used for efficient flat plate collector. Computations were achieved for a large variety of parameters to verify the significance of the created model.

Thermal analysis of PV system and solar collector integrated with greenhouse dryer for drying tomatoes

Energy ◽  
2020 ◽  
Vol 212 ◽  
pp. 118764 ◽  
Author(s):  
Mostafa M. Azam ◽  
Mohamed A. Eltawil ◽  
Baher M.A. Amer
Keyword(s):  
Thermal Analysis ◽  
Solar Collector ◽  
Pv System

Thermal analysis of a solar hybrid dehydrator designed for uniform multi-product drying

2021 ◽  
pp. 1-34
Author(s):  
Anjum Munir ◽  
Farhat Mahmood ◽  
Waseem Amjad ◽  
Syed Amjad Ahmad
Keyword(s):  
Thermal Analysis ◽  
Solar Collector ◽  
Salient Feature ◽  
Energy Utilization ◽  
Heating Source ◽  
Available Energy ◽  
Entire Height ◽  
Gas Heating ◽  
Energy Ratios ◽  
Perforated Sheet

Abstract Thermal analysis was performed for a vertical cabinet solar hybrid dryer having a salient feature of perforated sheet along its entire height to achieve uniform drying. The dryer was integrated with a solar collector and gas burner for hybrid heating source. Experiments were performed using tomato at 55°C with solar, gas, and dual (solar-gas) heating sources. Energy analysis showed that rates of energy utilization were found in ranges of 2.7-12.5 kW (dual), 3-13 kW (gas), 2.9-12 kW (solar) and energy ratios were 13-56% (dual), 14-58% (gas), 12-50% (solar). Exergy analysis showed that exergy losses were 2.1-5.0 kJ/kg (dual), 2.1-5.3 kJ/kg (gas) 1.5-4.2 kJ/kg (solar) while exergy efficiencies found 33-70% (dual), 30-75% (gas), 20-69% (solar). Based on higher values of exergetic factor and improvement potential rate (IP), it was found that optimization of heating source especially those consisting solar collector and heat exchanger (IP 1.93 kW) is required. The specific energies for the removal of product moisture and to dry the product were found 2.42, 2.72, 2.58 MJ/kg of water and 18.8, 21.2, 20.15 MJ/kg dried product for drying processes conducted under solar, gas, and dual (solar-gas) heating sources respectively. For design optimization, a complete algorithm has been prepared for complete drying systems in terms of available energy and losses.

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