A Concept to Increase the Bulk Warm Water Production of Ordinary Direct and Indirect Solar-Thermal Systems in Rural India

This paper focusses on the application of modified solar-thermal water-preheating systems used during the cooking process in large institutions in rural India. The goal is to reduce the fuel consumption. As a second step a concept is presented to promote the solution among wider group of people by providing a webpage to calculate the cost benefit analysis for potential users online. The presented solar thermal system was installed in cooperation with regional partners and “Engineers Without Borders India” in 2012 in Adoni in central Andhra Pradesh after a project site exploration in 2011. The system is still in operation and delivers hot water