1988
DOI: 10.1115/1.3240182
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Analytical and Experimental Investigation of Two-Phase Flow Screw Expanders for Power Generation

Abstract: An analytical procedure for calculating the performance of a two-phase flow screw-type expander is presented. Predicted results are compared with experimental measurements made with a recently developed prototype expander. This expander was designed for investigating the applicability of this type of machine as the expansion device in refrigeration or heat pump cycles with the objective of taking advantage of the power-producing capability of the expanding fluid. It has two rotors each with a diameter of 81.6 … Show more

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Cited by 49 publications
(26 citation statements)
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“…To fit the predicted p-V indicated diagrams to the experimentally determined indicated diagrams a discharge flow coefficient C D and a leakage paths flow coefficient C 0 have been used. The value used for the discharge flow coefficient C D was 0.8, in agreement with the values reported by Taniguchi et al [14]. If the pressure at the outlet of a converging nozzle is considered to correspond with the pressure at the nozzle then the flow coefficient C 0 should have a value lower than one.…”
Section: Labyrinth Seal Leakagementioning
confidence: 79%
See 1 more Smart Citation
“…To fit the predicted p-V indicated diagrams to the experimentally determined indicated diagrams a discharge flow coefficient C D and a leakage paths flow coefficient C 0 have been used. The value used for the discharge flow coefficient C D was 0.8, in agreement with the values reported by Taniguchi et al [14]. If the pressure at the outlet of a converging nozzle is considered to correspond with the pressure at the nozzle then the flow coefficient C 0 should have a value lower than one.…”
Section: Labyrinth Seal Leakagementioning
confidence: 79%
“…These leakages are treated separately and are superimposed on the ones derived with the UPR model. The simplest flow model widely used in simulation of screw compressors is the converging nozzle flow model, with assumptions that the compressible flow is isentropic and the pressure in the narrowest part of the flow path is equal to the downstream cavity pressure-see Zaytsev [4], Taniguchi et al [14]. Although the non-isothermal phase change complicates the mathematical treatment, the converging nozzle flow model can also be used for nonazeotropic refrigerants (such as ammonia-water).…”
Section: Impact Of Liquid Injection Anglementioning
confidence: 99%
“…In 1982, an analytical model of a helical screw expander has been derived by Margolis [3]. Taniguchi et al [4] proposed the use of two-phase screw expanders with organic fluids instead of water in a similar system to that proposed by Eliot [5]. In 1993 and 1996 Smith et al [6,7] proposed a Trilateral Flash Cycle (TFC) with a Lysholm machine used as a two-phase expander.…”
Section: Introductionmentioning
confidence: 99%
“…The main aspects of a detailed computational model for screw machines were established by Taniguchi et al [10], and developments in numerical methods have allowed the investigation of rotor profiles and machine geometries for a range of applications [11][12][13]. The full thermodynamic model of the expander used to investigate the performance of screw machines in the current study is based on the quasi one dimensional analysis of twin-screw machines as described by Stosic and Hanjalic [14,15], which has been extensively validated for compressors for a wide range of working fluids and operating conditions.…”
Section: Twin-screw Expander Modelmentioning
confidence: 99%