Thermodynamic analysis of a novel heat pipe based regenerative combined system

Beygzadeh, Vahid; Khalilarya, Shahram; Mirzaee, Iraj; Zare, Vahid; Miri, Gholamreza

doi:10.22060/ajme.2019.14875.5749

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	Thermodynamic analysis of a novel heat pipe based regenerative combined system
Article 8, Volume 4, Issue 1, Winter and Spring 2020, Page 71-80 PDF (804 K)
Document Type: Research Article
DOI: 10.22060/ajme.2019.14875.5749
Authors
Vahid Beygzadeh ¹; Shahram Khalilarya²; Iraj Mirzaee²; Vahid Zare ¹; Gholamreza Miri³
¹Faculty of Mechanical Engineering, Urmia University of Technology, Urmia, Iran
²Mechanical Engineering Department, Faculty of Engineering, Urmia University, Urmia, Iran
³Department of Business Management, National Iranian Oil Refining & Distribution Company, Tehran, Iran
Abstract
A comprehensive thermodynamic analysis is presented of a new solar system for heating and power generation. Energy and exergy analyses are used to characterize the exergy destruction rate in any component and investigate solar system performance. The system composed of a solar heat pipe evaporator (SHPE), an auxiliary pump, a condenser, a turbine, an electrical generator, a domestic water heater, a regenerator, a water preheater and a pump. The solar system provides heating and electricity during the summer and spring in Tabriz, Iran. The analysis involves the specification of effects of varying SHPE condenser pinch point temperature, varying solar radiation intensity and varying SHPE heat removal factor on the energetic and exergetic performance of the system. The performance parameters calculated are energy flow, exergy destruction rate, energetic and exergetic efficiencies. The results also showed that the main source of the exergy destruction rate is the SHPE. In the SHPE, 291.1 kW of the input exergy was destroyed. Other main sources of exergy destruction rate are the SHPE condenser, at 6.655kW; then the turbine, at 6.228 kW; and the water preheater, at 0.907 kW. The overall energetic and exergetic efficiencies of the combined solar system was approximately 69.57% and 12.41%, respectively.
Keywords
Energy Efficiency; Exergy efficiency; solar heat pipe system; regenerative organic Rankine cycle
Main Subjects
Design Methods Environmentally Friendly; District Heating; Energy Efficiency in Industry and Building; Exergy Analysis and Thermoeconomics; Heat and Mass Transfer with Phase change; Heat Transfer Enhancement; Modern Energy Technologies; Renewable Energies


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