发布时间：

2025-04-30

论文名称：

Advanced exergy analyses of an ejector expansion transcritical CO2 refrigeration system

发表刊物：

Energy Conversion and Management

摘要：

This paper presents a thermodynamic investigation on an ejector expansion transcritical CO2 refrigeration
system with advanced exergy analysis. By splitting the exergy destruction into endogenous/exogenous
and unavoidable/avoidable parts, more valuable information of the interactions among the system
components and the components improvement potential is provided. The results indicate that the compressor
with largest avoidable endogenous exergy destruction possesses the highest priority of improvement,
followed by the ejector, evaporator and gas cooler. The system exergy destruction is dominantly
endogenous, and 43.44% of the total exergy destruction can be avoided by improving the system components.
The evaporator has a serious impact on the exogenous exergy destruction within the compressor
and ejector, and its own exergy destruction is entirely belongs to endogenous part. The effects of the discharge
pressure, compressor efficiency and ejector efficiency on the system exergetic performance are
discussed. There is an optimal discharge pressure with respect to the minimum endogenous exergy
destruction in the compressor. Avoidable endogenous exergy destruction rates of the compressor and
ejector are respectively reduced by 93.6% and 81.7% when the corresponding component efficiency varies
from 0.5 to 0.9.

合写作者：

Tao Bai, Jianlin. Yu*, Gang. Yan.

卷号：

126

页面范围：

850-861

是否译文：

否

发表时间：

2016-08-28