0
Research Papers: Energy Systems Analysis

Parametric Analysis and Comparison of Ejector Expansion Refrigeration Cycles With Constant Area and Constant Pressure Ejectors

[+] Author and Article Information
Candeniz Seckin

Department of Mechanical Engineering,
Faculty of Engineering,
Marmara University,
Goztepe Campus,
Istanbul 34722, Turkey
e-mails: denizseckin1@gmail.com;
candeniz.seckin@marmara.edu.tr

1Corresponding author.

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received February 20, 2017; final manuscript received March 24, 2017; published online April 25, 2017. Assoc. Editor: Esmail M. A. Mokheimer.

J. Energy Resour. Technol 139(4), 042005 (Apr 25, 2017) (10 pages) Paper No: JERT-17-1090; doi: 10.1115/1.4036383 History: Received February 20, 2017; Revised March 24, 2017

In this work, parametric analysis of ejector expansion refrigeration cycles (EERC) with two different types of ejectors (constant area (CA) ejector and constant pressure (CP) ejector) is performed, and comparison of the results is presented. Effects of variation in operational parameters (condenser temperature, evaporator temperature, and cooling capacity) on coefficient of performance (COP), entrainment ratio (w), and pressure lift factor (Plf) are investigated. The range of variation for evaporator temperature, condenser temperature, and cooling capacity are −5 to 15 °C, 50–70 °C, and 10–80 kW, respectively. The ejector refrigeration cycle is simulated by ees software. The obtained results are validated by the experimental data available in the literature. The refrigerant R134a is selected based on the merit of its environmental and performance characteristics. The results show that the effect of evaporator temperature is much higher than that of condenser temperature on Plf. In contrast, the influence of condenser temperature on COP is much stronger than that of evaporator temperature. It is seen that COP and Plf of ejector expansion refrigeration cycle with constant pressure ejector (CP-EERC) are higher than those of refrigeration cycle with constant area ejector.

FIGURES IN THIS ARTICLE
<>
Copyright © 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Fig. 1

(a) Schematic overview of EERC and (b) P-h diagram of EERC

Grahic Jump Location
Fig. 2

Constant pressure ejector design

Grahic Jump Location
Fig. 3

Constant area ejector design

Grahic Jump Location
Fig. 4

Flowchart of the simulation program for EERC with constant area ejector

Grahic Jump Location
Fig. 5

Flowchart of the simulation program for EERC with constant pressure ejector

Grahic Jump Location
Fig. 6

Variation of COP and w versus evaporator temperature (Tevap)

Grahic Jump Location
Fig. 7

Variation of COP and Plf with evaporator temperature (Tevap)

Grahic Jump Location
Fig. 8

Variation of COP and w versus condenser temperature (Tcon)

Grahic Jump Location
Fig. 9

Variation of COP and Plf with condenser temperature (Tcon)

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In