Thermodynamic and exergoeconomic analyses and performance assessment of a new configuration of a combined cooling and po
- PDF / 3,887,604 Bytes
- 27 Pages / 595.276 x 790.866 pts Page_size
- 7 Downloads / 202 Views
Thermodynamic and exergoeconomic analyses and performance assessment of a new configuration of a combined cooling and power generation system based on ORC–VCR Alireza Mahmoudan1 · Parviz Samadof2 · Milad Sadeghzadeh3 · Mohamad Jalili3 · Mohsen Sharifpur4,5 · Ravinder Kumar6 Received: 25 July 2020 / Accepted: 4 September 2020 © Akadémiai Kiadó, Budapest, Hungary 2020
Abstract Waste heat recovery systems are proposed to be an environmentally benign and a cost-effective application for efficiency improvement of energy conversion systems. In this research, three different subsystems—gas turbine cycle, steam Rankine cycle, and a coupled organic Rankine cycle–vapor compression refrigeration—are integrated to obtain a high-efficiency layout from technical, economic, and environmental viewpoints. The whole system is simulated and analyzed with regard to energy, exergy, and exergoeconomic models. Furthermore, a sensitivity analysis is made to enable a better understanding of the effect of design parameters on the final performance of the total system. Based upon a parametric study, R602 demonstrates advantageous features such as higher thermal efficiency and improved exergetic efficiency in the ORC–VCR subsystem. Overall, analyses show that the proposed integrated system obtains the total energy and exergy efficiencies of 46.1% and 40.57%, respectively. Moreover, it has been illustrated that the overall structure is able to provide a 3810 kW net output power and a 303.8 kW cooling load. Besides, exergoeconomic evaluation depicts an exergy cost of 49.84 ($ G J−1) −1 and an exergy cost rate of 826.4 ($ h ). Keywords Low-grade waste heat recovery · Gas turbine · Organic Rankine cycle · Vapor compression refrigeration · Working fluids List of symbols A Surface area (m2) c Cost per exergy unit ($ GJ−1) Ċ Cost rate ($ h−1) CRF Capital recovery cost Ė Exergy rate (kW) e Specific physical exergy (kJ kg−1)
ẽ Specific chemical exergy (kJ kg−1) ECOP Ecological coefficient of performance f Exergoeconomic factor h Specific enthalpy (kJ kg−1) ir Interest rate LFL Low flammability limit (%) LHV Low heating value (kJ kg−1)
* Mohsen Sharifpur [email protected]; [email protected]
1
Department of Aerospace Engineering, K.N. Toosi University of Technology, Tehran, Iran
2
Department of Mechanical Engineering, Amirkabir University of Technology, Tehran, Iran
3
Renewable Energies and Environment Department, Faculty of New Science and Technologies, University of Tehran, Tehran, Iran
Parviz Samadof [email protected]
4
Institute of Research and Development, Duy Tan University, Da Nang 550000, Viet Nam
Milad Sadeghzadeh [email protected]
5
Department of Mechanical and Aeronautical Engineering, University of Pretoria, Pretoria 0002, South Africa
Mohamad Jalili [email protected]
6
Department of Mechanical Engineering, Lovely Professional University, Phagwara, Jalandhar, Punjab 144411, India
* Ravinder Kumar [email protected] Alireza Mahmoudan ama
Data Loading...
