Performance evaluation of a low-grade power generation system with CO2 transcritical power cycles

Journal article


Ge, Y., Li, L., Luo, X. and Tassou, S.A. (2017). Performance evaluation of a low-grade power generation system with CO2 transcritical power cycles. Applied Energy. 227, pp. 220-230. https://doi.org/10.1016/j.apenergy.2017.07.086
AuthorsGe, Y., Li, L., Luo, X. and Tassou, S.A.
Abstract

Globally, there are vast amounts of low-grade heat sources from industrial waste and renewables that can be converted into electricity through advanced thermodynamic power cycles and appropriate working fluids. In terms of the working fluid’s environmental impact, temperature match of cycle heat processes and system compactness, CO2 transcritical power cycles (T-CO2) were deemed more applicable for low-grade heat to power conversion. However, the system thermal efficiency of a T-CO2 requires further improvement. Subsequently, a test rig of the small-scale power generation system with T-CO2 power cycles was developed with essential connected components. These include a plate thermal coil CO2 supercritical heater, a CO2 transcritical turbine, a plate recuperator, an air-cooled finned-tube CO2 condenser and a CO2 liquid pump. Various preliminary test results from the system measurements are demonstrated in this paper. Meanwhile, the system model has been developed and applied to predict system performance at different operating conditions. The simulation results can therefore instruct further design and optimisation of system and components.

Year2017
JournalApplied Energy
Journal citation227, pp. 220-230
PublisherElsevier
Digital Object Identifier (DOI)https://doi.org/10.1016/j.apenergy.2017.07.086
Publication dates
Print01 Oct 2018
Online04 Aug 2017
Publication process dates
Accepted22 Jul 2017
Deposited15 Sep 2020
Publisher's version
License
File Access Level
Open
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