Comparative study of waste heat steam SRC, ORC and S-ORC power generation systems in medium-low temperature. (5th August 2016)

• Record Type: Journal Article
• Authors: Zhang, Xiaojun; Wu, Lijun; Wang, Xiaoliu; Ju, Guidong
• Is Part Of: Applied thermal engineering. Volume 106(2016:Aug.)
• Page Start: 1427
• Page End: 1439
• Publication Date: 2016-08-05
• Subjects: Medium-low temperature waste heat steam -- Rankine cycle -- Comparison of power generation systems; Heat engineering -- Periodicals; Heating -- Equipment and supplies -- Periodicals; Periodicals; 621.40205
• DOI: 10.1016/j.applthermaleng.2016.06.108
• Languages: English
• ISSNs: 1359-4311

Abstract

Highlights: SRC, ORC and S-ORC three kinds of power systems are computed and compared under the condition of the same heat source. For low enthalpy heat, ORC is more efficient than SRC in recovering the latent heat of condensation of water vapor. S-ORC power generation system has a better matching of heat source temperature. The ORC is optimal under the condition of 150–210 °C, while S-ORC has obvious advantages under the condition of 210–350 °C. Abstract: For Steam Rankine Cycle (SRC), Organic Rankine Cycle (ORC) and Steam-Organic Rankine Cycle (S-ORC) power systems, in this paper, mathematical models are developed to explore the feasibility that combines the fluid-low temperature (150–350 °C) waste heat steam and low-boiling point organic working fluids for power generation. Using the numerical models, we calculate and compare thermal efficiency, exergy efficiency, operation pressure, generating capacity, etc. of three power systems, namely SRC, ORC and S-ORC under the same heat source conditions. The results show that under the condition of 150–210 °C heat source, ORC has the highest thermal efficiency, exergy efficiency and power generation; while at 210–350 °C, the performance of the S-ORC has a distinct advantage. Its thermal efficiency and exergy efficiency are higher than those of the SRC and ORC power systems.