Parametric effects on the performance of flat plate collectors of a solar water heating system C.B Joshi, T.R Bajracharya, B.R Maharjan, H.M Nakarmi, N.L Shrestha Department of Mechanical Engineering Pulchowk Campus, IOE, TU GPO Box 1175, Pulchowk, Lalitpur ,Nepal “Corresponding author, FAX: 977 1 5525830, email address: triratna@ioe.edu.np ABSTRACT Among all water heating devices that are based on renewable energy sources, solar water heating systems are the most popular ones. As a result, uses of such systems have been increasing significantly. However, no in depth attempt has been made to analyze and determine the performance of these systems in Nepal. Such kind of endeavor is, however, necessary to explore the possibilities of such systems. This will bring benefits to all concerned. In this study, a benign attempt has been made to determine the combine effects of different interdependent parameters on the efficiency of Flat Plate Collector, the heart of the system, by...