Thermodynamic Analysis of a Novel Heat Pipe Based Regenerative Combined System

Document Type : Research Article

Authors

1 Faculty of Mechanical Engineering, Urmia University of Technology, Urmia, Iran

2 Mechanical Engineering Department, Faculty of Engineering, Urmia University, Urmia, Iran

3 Department 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, 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 solar heat pipe evaporator condenser pinch point temperature, varying solar radiation intensity and varying solar heat pipe evaporator 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 solar heat pipe evaporator. In the solar heat pipe evaporator, 291.1 kW of the input exergy was destroyed. Other main sources of exergy destruction rate are the solar heat pipe evaporator condenser, at 6.655 kW; 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 69.57% and 12.41%, respectively.
A comprehensive thermodynamic analysis is presented of a new solar system for heatingand power generation. Energy and exergy analyses are used to characterize the exergy destruction ratein any component and investigate solar system performance. The system composed of a solar heat pipeevaporator, 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 duringthe summer and spring in Tabriz, Iran. The analysis involves the specification of effects of varying solarheat pipe evaporator condenser pinch point temperature, varying solar radiation intensity and varyingsolar heat pipe evaporator heat removal factor on the energetic and exergetic performance of the system.The performance parameters calculated are energy flow, exergy destruction rate, energetic and exergeticefficiencies. The results also showed that the main source of the exergy destruction rate is the solar heatpipe evaporator. In the solar heat pipe evaporator, 291.1 kW of the input exergy was destroyed. Othermain sources of exergy destruction rate are the solar heat pipe evaporator condenser, at 6.655 kW; thenthe turbine, at 6.228 kW; and the water preheater, at 0.907 kW. The overall energetic and exergeticefficiencies of the combined solar system was 69.57% and 12.41%, respectively.

Keywords

Main Subjects

References

[1] F.Yilmaz, M.Ozturk, R.Selbas, Energy and exergy performance assessment of a novel solar-based integrated system with hydrogen production, Int.J.Hydrogen Energ., 44(34) (2019) 18732– 18743.
[2] A.Moaleman, A.Kasaeian, M.Aramesh, O.Mahian, L.Sahota, G.N.Tiwari, Simulation of the performance of a solar concentrating photovoltaic-thermal collector applied in a combined cooling heating and power generation system, Energy Convers. Manag., 160(1) (2018) 191–208.
[3] E. Azad, Theoretical analysis to investigate thermal performance of co-axial heat pipe solar collector, Heat and Mass Transfer, 47(1) (2011) 1651–1658.
[4] A.Kasaeian, G.Nouri, P.Ranjbaran, D.Wen, Solar collectors and photovoltaics as combined heat and power systems: A critical review, Energy Convers. Manag., 156(1) (2018) 688–705.
[5] O.Z. Sharaf, M.F Orhan, Comparative thermodynamic analysis of densely-packed concentrated photovoltaic thermal (CPVT) solar collectors in thermally in-series  and in-parallel receiver configurations, Renew. Energ., 126(1) (2018) 296-321.
[6] A.A. Alzahrani, I.Dincer, Thermodynamic analysis of an integrated transcritical carbon dioxide power cycle for concentrated solar power systems, Sol. Energy, 170(1) (2018) 557–567.
[7] A.Shafieian, M.Khiadani, A.Nosrati, A review of latest developments, progress, and applications of heat pipe solar collectors, Renew. Sust. Energ. Rev., 95(1) (2018) 273-304.
[8] L.Hui, C.T.Tai, J.Jie, Building-integrated heat pipe photovoltaic/thermal system for use in Hong Kong, Sol. Energy, 155(1) (2017) 1084-1091.
[9] H.N.Chaudhry, B.R.Hughes, S.A.Ghani, A review of heat pipe systems for heat recovery and renewable energy applications. Renew. Sust. Energ. Rev., 16(1) (2012) 2249– 2259.
[10] H. Jouhara, A. Chauhan, T. Nannou, S. Almahmoud, B. Delpech, L.C. Wrobel, Heat pipe based systems- Advances and applications, Energy, 128(1) (2017) 729- 754.
[11] E. Azad, Assessment of three types of heat pipe solar collectors, Renew. Sust. Energ. Rev., 16(5) (2012) 2833– 2838.
[12] N.Sato, Chemical Energy and Exergy, Elsevier Science, 2004.
[13] Iran Renewable Energy and Energy Efficiency Organization Annual report, 2010-2017.
[14] Chi SW, Heat Pipe Theory and Practice: A Source Book, Hemisphere Pub. Corp, 1976.
[15] J.A. Duffie, W.A. Beckman. Solar Engineering of Thermal Processes, John Wiley & Sons, Inc., 2013.
AUT Journal of Mechanical Engineering
Volume 4, Issue 1
March 2020
Pages 89-102

Files

Share

How to cite

Statistics