Model development and numerical procedure for detailed ejector analysis and design

Thermodynamic analysis of a novel compact power generation and waste heat operated absorption, ejector-jet pump refrigeration cycle

“…The mixed fluid (7) from the jet pump for cooling enters into the condenser-1 through diffuser section of the jet pump where the flow decelerates and the pressure recovery occurs upto the condenser-1 pressure. Now the saturated liquid (8) divides into two parts (9,10). The one part (10) is as the secondary fluid of the ejector which passes through the throttle valve (TV 1 ) where the pressure reduces to the pressure of the evaporator-1 and goes to the evaporator-1 of the EJPRC.…”

“…For the ejector analysis, Keenan introduced the one dimensional constant pressure mixing theory on the basis of gas dynamics [7]. Huang and Ouzzane developed it [8,9], which can be applied to both the ejector and jet pump however two phase mixing flow through the jet pump is very complicated. The following assumptions are made for the analysis of the proposed cycle;…”

“…A homogenous two-phase flow mixing inside the jet pump is idealized. (9) The power consumed by the circulating and solution pump (P 1 and P 2 ) is negligible.…”

Numerical assessment of ejector operation for refrigeration applications based on CFD

“…Judging on the number of papers recently published [5,6] on this subject, it is perhaps one of the most important application areas for ejectors. Extensive experimental and theoretical work have been carried out and it is currently continuing but despite the apparent simplicity of the ejector layout, the flow field is highly complex and there is still no comprehensive theory capable of completely describing how the performance and operation of an ejector are affected by the geometry and external constraints.…”

“…In this case, ejectors may either totally replace mechanical compressors ( Fig. 2) or simply be introduced as means of cycle optimization [5][6][7]. In this latter case, the basic cycle may be used as a sub-cooling stage or it may be combined with the compressor in order to decrease the condensation pressure of a main refrigeration cycle.…”