Thermodynamic analysis of an organic rankine cycle using a tubular solar cavity receiver. (1st November 2016)

• Record Type: Journal Article
• Authors: Loni, R.; Kasaeian, A.B.; Mahian, O.; Sahin, A.Z.
• Is Part Of: Energy conversion and management. Volume 127(2016)
• Page Start: 494
• Page End: 503
• Publication Date: 2016-11-01
• Subjects: Thermodynamic analysis -- Cavity receiver -- Solar ORC -- Thermal efficiency -- Second law efficiency; Direct energy conversion -- Periodicals; Energy storage -- Periodicals; Energy transfer -- Periodicals; Énergie -- Conversion directe -- Périodiques; Direct energy conversion; Periodicals; 621.3105
• DOI: 10.1016/j.enconman.2016.09.007
• Languages: English
• ISSNs: 0196-8904

Abstract

Highlights: A non-regenerative Organic Rankine Cycle has been analyzed. R113, R601, R11, R141b, Ethanol and Methanol were used as the working fluid. A parabolic dish concentrator with a square prismatic cavity receiver was used. Thermal efficiency, second law efficiency, and net power output were analyzed. Abstract: In this study, a non-regenerative Organic Rankine Cycle (ORC) has been thermodynamically analyzed under superheated conditions, constant evaporator pressure of 2.5 MPa, and condenser temperature of 300 K. R113, R601, R11, R141b, Ethanol and Methanol were employed as the working fluid. A parabolic dish concentrator with a square prismatic tubular cavity receiver was used as the heat source of the ORC system. The effects of the tube diameter, the cavity depth, and the solar irradiation on the thermodynamic performance of the selected working fluid were investigated. Some thermodynamic parameters were analyzed in this study. These thermodynamic parameters included the thermal efficiency, second law efficiency, total irreversibility, availability ratio, mass flow rate, and net power output. The results showed that, among the selected working fluids, methanol had the highest thermal efficiency, net power output, second law efficiency, and availability ratio in the range of turbine inlet temperature (TIT) considered. On the other hand, methanol had the smallest total irreversibility in the same range of TIT. The results showed also that mass flow rate and consequently the net power output increased for higher solar irradiation, smaller tube diameter, and for the case of cubical cavity receiver (i.e. cavity depth h equal to the receiver aperture side length a).