INVESTIGATION OF THE EFFECT OF THE PRIMARY NOZZLE THROAT DIAMETER ON THE EVAPORATOR PERFORMANCE OF AN EJECTOR EXPANSION REFRIGERATION CYCLE

Year 2018, Volume: 4 Issue: 3, 1939 - 1953, 22.03.2018

Candeniz Seçkin

https://doi.org/10.18186/journal-of-thermal-engineering.408659

Cited By: 8

Abstract

The present work aims to perform the thermodynamic
analysis of an ejector expansion refrigeration cycle (EERC) with a
constant-pressure two phase flow ejector and to present the effect of primary
nozzle throat diameter on cooling capacity of the EERC. The refrigerant is
R134a. In order to achieve these objectives, a computational program is developed
using EES software to simulate the system. Mathematical modeling of EERC and
applied computational procedure are reported in detail. Operation under
critical mode is favorable in ejector operation in terms of high entrainment
ratio and enhanced ejector performance. As a result, in this present study,
ejector of the refrigeration cycle operates under critical conditions and
normal shock occurs at the end of the constant area mixing section. Not an
iteration process but Henry and Fauske model is applied to determine the
physical properties of the fluid under critical conditions.

Keywords

Ejector, Ejector Expansion Refrigeration, Constant-Pressure Ejector, Two-Phase Ejector

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