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Experimental investigation on RORC system performance for recovering LNG cold energy under heating and cooling capacities variations.
- Source :
-
Energy Conversion & Management . Aug2023, Vol. 290, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- • An experimental RORC system using liquid nitrogen as the cold sink has been built. • Effect of heating and cooling capacities on system performance are examined. • A guidance for the operation of gasification stations has been provided. • MSHE is high efficiency, low cost, but also high exergy destruction. A large amount of available cold energy exists in Liquid Natural Gas (LNG). While it is not efficiently utilized and is released into the ocean. To efficiently utilize LNG cold energy, a power generation test bench based on the organic Rankine cycle has been established with R290 as the working fluid, a scroll expander as the thermal conversion device, and a multi-stream heat exchanger as the high-efficiency heat exchange device. The low-grade heat source and LNG are simulated by electrically heated hot water and −198 °C liquid nitrogen. The following are the main conclusions: (1) Heating and cooling capacities have different degrees of influence on system performance, and there is a matching relationship between the two capacities; (2) system maximum thermal efficiency and cold energy utilization rate are 6.13% and 12.04%, respectively. The comprehensive performance reaches the highest when the ratio of heating-to-cooling capacity is 1.96; (3) among the main components in the system, the increasing proportion of expander exergy destruction plays a positive role in improving the total system exergy efficiency. While the increasing proportion of heat exchangers exergy destruction has a negative influence in system exergy efficiency. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01968904
- Volume :
- 290
- Database :
- Academic Search Index
- Journal :
- Energy Conversion & Management
- Publication Type :
- Academic Journal
- Accession number :
- 164257161
- Full Text :
- https://doi.org/10.1016/j.enconman.2023.117157