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By: Azharuddin, Prashant Saini, Abhinav Yadav, Vijay Kumar Dwivedi, and Piyush Tiwari
1.Azharuddin,Student, Department of Mechanical Engineering, Madan Mohan Malaviya University of Technology, Gorakhpur, Uttar Pradesh, 273010, India
2.Prashant Saini*,Assistant Professor, Department of Mechanical Engineering, Madan Mohan Malaviya University of Technology, Gorakhpur, Uttar Pradesh, 273010, India
3.Abhinav Yadav,Student, Department of Mechanical Engineering, Madan Mohan Malaviya University of Technology, Gorakhpur, Uttar Pradesh, 273010, India
4.Vijay Kumar Dwivedi,Professor and Chairman, Training and Placement Cell, Madan Mohan Malaviya University of Technology, Gorakhpur, Uttar Pradesh, 273010, India
5.Piyush Tiwari,Student, Department of Mechanical Engineering, Madan Mohan Malaviya University of Technology, Gorakhpur, Uttar Pradesh, 273010, India
Energy from the sun is the most profuse and least extracted source of energy ever used in the history of usable resources. Current work aims to harness solar energy for heating water and put it into use by maximizing its effect through evacuated tube solar collector (ETSC). In this work, the effect of low mass flow rates on thermodynamic performance (energy efficiency, exergy efficiency and rate of irreversibility) of an ETSC is investigated at Gorakhpur, India experimentally. The energy efficiency and exergy efficiency represent the quantitative and qualitative performances of the proposed system. To calculate system performance, conditions were taken with the variation in mass flow rates (5×10^(-4) kg/s, 7×10^(-4) kg/s, and 9×10^(-4) kg/s) for three consecutive days. Results reveals that, maximum solar intensity and ambient temperature have been recorded as 810 W/m2 and 37 ℃ respectively. Maximum value of ETSC inlet and outlet temperatures recorded as 43 ℃ and 97 ℃ respectively. Maximum ETSC energy efficiency and exergy efficiency have been obtained as 43.46% and 45.39% respectively. Evacuated tubes provided an edge on energy conservation as it does not require direct sunlight on collector surface due to its shape which resulted in minimal loss of energy and increase in thermal efficiencies. Such a system is recommended for their further integration with various energy generation systems to produce the energy effects.
Keywords: Solar energy· Evacuated tube collector· Water heating system· Thermodynamic analysis· Rate of Irreversibility.
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