Date:

2025-04-30

Title of Paper:

Energy, exergy and exergoeconomic analyses of a combined supercritical CO2 recompression Brayton/absorption refrigeration cycle

Journal:

ENERGY CONVERSION AND MANAGEMENT

Summary:

Exergoeconomic analysis is performed for a novel combined SCRB/ARC (supercritical CO2 recompression
Brayton/absorption refrigeration cycle) in which the waste heat from the SCRBC is recovered by an ARC
for producing cooling. Parametric analysis is conducted to investigate the effects of the decision variables
on the performance of the SCRB/ARC cycle. The performances of the SCRB/ARC and SCRBC cycles are optimized
and compared from the viewpoints of first law, second law and exergoeconomics. It is concluded
that combining the SCRBC with an ARC can not only enhance the first and second law efficiencies of the
SCRBC, but also improve the exergoeconomic performance. The results show that the largest exergy
destruction rate occurs in the reactor, while the components in the ARC have less exergy destruction.
The reactor and turbine are the first and second important components from exergoeconomic aspects.
When optimization is based on the exergoeconomics, the first and second law efficiencies and the total
product unit cost of SCRB/ARC are 26.12% higher, 2.73% higher and 2.03% lower than those of the SCRBC.
The optimization study also reveals that an increase in the reactor outlet temperature can enhance both
thermodynamic and exergoeconomic performances of the SCRB/ARC. For the basic design case, the SCRB/
ARC can produce 71.76MW of the cooling capacity and 6.57 MW of the cooling exergy at the expense of
only 0.36MW of power in comparison with the SCRBC.

Co-author:

吴闯，王顺森，冯雪佳，李军

Volume:

148

Page Number:

360-377

Translation or Not:

No

Date of Publication:

2017-09-15