Economic Analysis and Comparison of Two Solar Energy Systems with Domestic Water Heating Systems

Abstract In this work, an economic analysis of different types of thermosiphons and geysers and flat plate collectors and solar ponds employeed in conventional solar energy systems used in houses is analized and the results obtained for these systems are compared with each other. These comparisons show that when the inflation rate is 50% or less solar energy systems are more economical than the other conventional systems, except for conventional systems in which solid fuels are used. If the calculations are done assuming that the consumer credit interest rate varies between 55-70%, it is seen that solar energy systems will only be more economical than thermosiphons operating with electrical energy and geysers using LPG. Thermosiphons operating with electrical energy will never be economical under any inflation