Exergoeconomic and exergoenvironmental analysis of the evacuated tube heat pipe; a experimental study.

In this paper, the thermodynamic performance of a boroxide-added glass evacuated tube heat pipe (ETHP) is studied, including energy, exergy, environmental, economic analysis, and sustainability index. It has been found that 50,87% of the energy loss of water and 50,86% of the exergy loss of water are caused by radiation. There are 4 collectors each collector 57 pipes as a total of 108 pieces pipes, a hot water tank, a heat exchanger, and a pump in the system. The water is used as a working fluid due to economic and common use in the system. In the result of this experimental study, we calculated energy and exergy efficiencies of the EHTP system as % 22,21 and % 13,68, respectively. In addition, the environmental, exergoenviromental, enviroeconomic, and exergoenviroeconomic values of the EHTP system are found 458,5 kgCO₂/day, 456,5 kgCO₂/day, 0,003708 $/day and 0.003692 $/day, respectively. Also, the sustainability index of the system is found as 1,159. [ABSTRACT FROM AUTHOR]