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Solar energy is an abundant and clean source of energy which is available everywhere. Due to these mentioned qualities, there is lot of research going on to make solar energy harnessing more optimized and more efficient. Solar tracking is a great option for achieving the aforementioned goals. This paper presents an introduction of solar energy scenarios including types of materials used for PV panels, types of tracking drives used and their subtypes. This paper also gives a brief comparison between the active and passive tracking system which will explain about their working principles. This paper discusses in brief the various passive solar tracking systems which are seen in various research papers studied for this review paper. The main focus is on studying and describing various passive solar tracking mechanism and the incremental efficiencies that these trackers offer to the system. The Passive solar tracking systems are mainly categorized in four types. These include trackers based on SMA (Shape Memory Alloys) type, gravity and weight differential type, fluid density based and thermal expansion type. The paper discusses various advantages and disadvantages of passive systems in consideration and illustrates their respective increment in energy output of PV cells with respect to a stationary one. The paper then concludes by mentioning the overall scenario of passive tracking systems, further improvements possible and how they may be a good choice for solar trackingsystems.
This work is licensed under a Creative Commons Attribution-NoDerivatives 4.0 International License.
CC Attribution-NoDerivatives 4.0