Energy, exergy and economic analysis of evacuated tube solar water heating system integrated with heat exchanger

Abstract

In the present study energy, exergy and economic analysis of a modified evacuated tube solar water heating system are determined. The conventional evacuated tube-based solar water heating system is modified by using the primary and secondary circuit of heat transfer through the integration of vertical shell and tube heat exchanger as heat exchanging device, the analysis is repeated simultaneously for nanofluid and DM (demineralized) water as primary fluid. The present solar water heating system is designed for fouling free operation and is installed on the flat roof of Rustamji Institute of Technology, B.S.F. Academy, Tekanpur, (M.P.), India (latitude 25.9838° N and longitude 78.2617° E, at an elevation of 190 m MSL with 68% average humidity). The experimentation work is conducted during day hours. The results for exergy and energy efficiency are calculated at 0.5% concentration of CuO Nanoparticle with base fluid and at a mass flow rate of 0.0033 kg/s. The comparative analysis of the energy and extertic efficiencies with two primary fluid as well as economic analysis of the present system is done for the determination of practical suitability of the present system at areas having hard underground water.