Transient Analysis on Effect of Inclination Angles in the Performance of Finned PCM Heat Sink Integrated Photovoltaic Panels

Jayasree Sushma Ramathota
2020 International Journal for Research in Applied Science and Engineering Technology  
In this paper, the performance of the Phase change material in a heat sink integrated with a Photovoltaic Panel is explored by providing both internal and external fins to the sink. The performance characteristics of PCM can be evaluated with different inclinations (25 0 ,30 0 , and 35 0 ) of Photovoltaic Panels. RT 42 is used as PCM material in the heat sink. AUTO CAD 18.0 is used to design the PV back panels integrated with PCM heat sinks (PV-PCM) and Ansys Fluent 19.0 for transient analysis
more » ... transient analysis with the constant wall temperature of 343 0 K on the top of the PCM heat sink and calculated the temperature distribution, heat enhancement and melting time for increasing the efficiency of PV panels. The results showed a significant improvement in melting time, and temperature distribution in PV panels, if the fins are provided as of three in number and inclination of 25 0 for the panel. Keywords: Phase Change Material (PCM), heat sink, Melting time, liquid fraction and Fins I. INTRODUCTION Renewable energy becoming an important aspect in development of several applications, one of its applications is Photovoltaic panels. The uses of these panels are most significant due to its advantages of fewer emissions. To increase the efficiency of PV Panels, several techniques are in research concern. One of them is the use of Phase Change Material (PCM) in PV cells. As PCM is latent heat storage material, it is useful in many areas like electronic applications [1], textiles, automobiles, heat management by waste materials LED Lights, and many more. PCMs have the property of reversible conversion i.e., absorbing heat when it is heated (Charging Process) and release of heat when the heat is removed (discharging process). Due to this property, it is used in many thermal storage systems. PCMs are mainly categorized in three forms namely Organic, Inorganic, and eutectic salts. Among all, the choice of Organic PCMs is preferred over Inorganic PCMs, as they don't react and rust with PCM capsulated material [2]. Therefore, leakage issues with Organic based PCMs are very rare. Organic PCMs also exhibit a very low degree of sub cooling compared to Inorganic PCMs. Paraffin is commonly used Organic PCM due to its desirable properties, although its thermal conductivity is relatively low and can be expensive compared to other inorganic PCMs. The factors that affect the efficiency of Photovoltaic panels are solar incident on the cell, the material of semiconductor in use i and the operating temperature of PV cell which is majorly controlled by effective cooling of panels by water or forced air but it causes issues like corrosion. So, the passive cooling technique of using PCM in PV panels is a prominent technique. The various methods have been implementing in northern countries [3] . The use of nanomaterials [4] in the PCM for much more effective heat absorbing from PV cells was experimented, A new method of providing fins for discharging heat from PCM is experimentally proved [5] . The fins that are internally assigned to the PCM sink to increase the heat transfer from PV cell [6] . The use of salt eutectics as PCM is experimentally done and seen an increase in thermal conductivity of PCM and melting time [7] the recent study has seen that the inclination angle of PV cell also affects the efficiency of the panel [8] . Several experiments in both indoor and outdoor of the buildings at different climatic conditions and concluded that PCM effects are predominant on PV temperature in hot climates [9] . Their study in UAE at desert conditions used RT42 as PCM saw a decrease of heat transfer by 7% with a temperature of 3.5 0 c during day time and the indoor conditions of decreased peak temperature in the interior of the building by two hours and the power output increase by 5.5% [10]. The experiments in Italy at Palermo [11] during the summer season of June for two days and observed difference in an effective heat transfer, if there is no direct thermal contact between the back surface of the PV-Panel and PCM. The results with a finitedifference model for PV-Panel integrated with plastic pouches of capsulated PCM at the back surface of the PV Panel [12] are calculated numerically [13]. Commercially RT 27(Tm =27 °C) encapsulated in plastic pouches and placed at the back of PV Panel with the help of wire mesh is conducted experimentally in tropical climates of Malaysia for the first time in the present duration and
doi:10.22214/ijraset.2020.31634 fatcat:htpszdupabanbky5klv5hyo3te