TY - JOUR
TI - Performance analysis of solar assisted multigenerational system using therminol VP1 based nanofluids: A comparative study
AU - Khan Muhammad S
AU - Amber Khuram Pervez
AU - Ali Hafiz Muhammad
AU - Abid Muhammad
AU - Ratlamwala Tahir A. H
AU - Javed Samina
JN - Thermal Science
PY - 2020
VL - 24
IS - 2
SP - 865
EP - 878
PT - Article
AB - The application of the nanofluids is suggested to enhance and improve the  efficiency of solar thermal power system. In the present study, three  different nanofluids (Fe2O3/therminol VP1, SiO2/therminol VP1 and  Cu/therminol VP1) are numerically investigated in parabolic dish solar  collector that is further integrated to a combined cycle for power and  hydrogen production. Heat rejects from the power cycle is also utilized to  drive a single effect absorption (LiBr/water) system. Furthermore, a  comprehensive energy, exergy and exergo-environmental analysis are carried  out by varying several input parameters and their influence on overall  energetic and exergetic efficiencies, network output and rate of hydrogen  generation is assessed. The engineering equation solver (EES) is employed to  conduct the parametric study. Outcomes of the study demonstrate that the  SiO2/VP1 has the better characteristics among the investigated nanofluids.  The overall energetic efficiency of the SiO2/VP1, Fe2O3/VP1 and Cu/VP1 is  almost 38.79%, 38.74% and 37.53%, while overall exergetic efficiency is  41.72%, 41.66% and 40.36%, respectively at 1000 Wm-2. The  exergoenvironmental impact coefficient and impact index are noticed to be  reduced for all the three nanofluids as mass flow rate increases. The  hydrogen production rate for SiO2/VP1 is maximum and has observed to be  increased by increasing the ambient temperature. Increase in nanoparticles  concentration also rises the exergetic efficiency but reduces the thermal  conductivity of the nanofluids. Coefficient of performance is noticed to be  increased with rise in evaporator temperature, whereas, it is reduced by  increasing the generator temperature.