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Thermodynamic and techno-economic analysis of heat pipe ETC water heating system for Indian composite climate

An experimental approach

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Abstract

This paper presents the thermodynamic and techno-economic performance calculation of heat pipe evacuated tube collector (HP-ETC) solar water heating system by energy, exergy analysis and different economic parameters for Indian composite climate of Jammu. The HP-ETC solar water heating system of 1.69 m2 was designed and fabricated for a family with an average size of six persons. The experiments were done for six different mass flow rates of working fluid (water) such as 20, 30, 40, 50 and 60 L per hour (LPH). The highest average energy and exergy efficiencies were obtained to be 72% and 5.2%, respectively, for 20 LPH, while the lowest values of respective parameters were 55% and 1.25% at 60 LPH flow rate. The maximum and minimum average outlet temperatures from collector were found to be 76.4 and 45 °C at 20 and 60 LPH, respectively. It has been observed that heat pipe ETC water heating system is better than direct flow evacuated tube collector-based water heating system. Also, the exergy efficiency was found to be much lower than energy efficiency for all the selected mass flow rates. The techno-economic analysis of heat pipe evacuated tube solar water heating system was done by three methods, namely annual cost, life-cycle savings and payback period. The cost of hot water production at desired temperature was found to be INR 0.12 per liter, whereas that of the electric geyser and gas geyser was INR 0.40 and 0.26, respectively. The payback period of heat pipe ETC solar water heater was estimated to be 4 years, which is much less than the life of HP-ETC solar water heating system.

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Correspondence to V. V. Tyagi.

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Chopra, K., Tyagi, V.V. & Pandey, A.K. Thermodynamic and techno-economic analysis of heat pipe ETC water heating system for Indian composite climate. J Therm Anal Calorim 139, 1395–1407 (2020). https://doi.org/10.1007/s10973-019-08487-z

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Keywords

  • Evacuated tube collector
  • Solar energy
  • Techno-economic analysis
  • Heat pipe
  • Energy analysis
  • Exergy analysis