Numerical simulations and experiments are carried out in this paper to research about characteristics of heat transfer, frictional resistance comprehensive performance turbulent water flow (3000 < Re 10,000) a circular tube with twisted tape inserts. A new type is proposed it shows excellent on transfer enhancement. Effects three parameters including twist ratio (p/w=3, 4, 5), geometrical struc...

Solar water heating system is convincing technology to convert solar energy into thermal energy. According the survey, approximately 42% of refined crude oil used in industries and commercial applications for processes. Fossil fuel main source that depleting continuously. an environment-friendly source, which can fulfill demand. collectors are most popular domestic as well industrial sectors du...