Experimental study of the performance characteristics of a steam-ejector refrigeration system

Chen, Yau‐Ming; Sun, Chung-Yung

doi:10.1016/s0894-1777(97)00006-x

Cited by 97 publications

(32 citation statements)

References 9 publications

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“…Cardemil and Colle [13] proposed a real-gas ejector model. The evaluation results show good agreement with the experimental data for the R141b [8], water [14] and carbon dioxide [15] ejectors operating at critical modes.…”

Section: Introductionsupporting

confidence: 69%

Performance Predictions of Dry and Wet Vapors Ejectors Over Entire Operational Range

Chang

et al. 2017

Energies

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Abstract:If a traditional ideal-gas ejector model is used to evaluate the performance of a wet vapor ejector, large deviations from the experimental results will be unavoidable. Moreover, the model usually fails to assess the ejector performance at subcritical mode. In this paper, we proposed a novel model to evaluate the performance of both dry and wet vapors ejectors over the entire operational range at critical or subcritical modes. The model was obtained by integrating the linear characteristic equations of ejector with critical and breakdown points models, which were developed based on the assumptions of constant-pressure mixing and constant-pressure disturbing. In the models, the equations of the two-phase speed of sound and the property of real gas were introduced and ejector component efficiencies were optimized to improve the accuracy of evaluation. It was validated that the proposed model for the entire operational range can achieve a better performance than those existing for R134a, R141b and R245fa. The critical and breakdown points models were further used to investigate the effect of operational parameters on the performance of an ejector refrigeration system (ERS). The theoretical results indicated that decreasing the saturated generating temperature when the actual condensing temperature decreases, and/or increasing the saturated evaporating temperature can improve the performance of ERS significantly. Moreover, superheating the primary flow before it enters the ejector can further improve the performance of an ERS using R134a as a working fluid.

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Section: Introductionsupporting

confidence: 69%

Performance Predictions of Dry and Wet Vapors Ejectors Over Entire Operational Range

Chang

et al. 2017

Energies

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“…Using water (R718b) as a working fluid provides many advantages : it has a high heat of vaporization, is inexpensive and has minimal environmental impact; however, the cooling cycle temperature is limited to above 0°C, limiting the obtainable COP to less than 0.5 [125]. Moreover, due to the large specific volume of the water, large diameter pipes are required for minimizing the pressure loss [126]. Therefore, water is often employed in experimental devices but is rarely used in real refrigeration systems.…”

Section: Working Fluids In Ejector Refrigerationmentioning

confidence: 99%

Ejector refrigeration: A comprehensive review

Besagni

Mereu

Inzoli

2016

Renewable and Sustainable Energy Reviews

407

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a b s t r a c tThe increasing need for thermal comfort has led to a rapid increase in the use of cooling systems and, consequently, electricity demand for air-conditioning systems in buildings. Heat-driven ejector refrigeration systems appear to be a promising alternative to the traditional compressor-based refrigeration technologies for energy consumption reduction. This paper presents a comprehensive literature review on ejector refrigeration systems and working fluids. It deeply analyzes ejector technology and behavior, refrigerant properties and their influence over ejector performance and all of the ejector refrigeration technologies, with a focus on past, present and future trends. The review is structured in four parts. In the first part, ejector technology is described. In the second part, a detailed description of the refrigerant properties and their influence over ejector performance is presented. In the third part, a review focused on the main jet refrigeration cycles is proposed, and the ejector refrigeration systems are reported and categorized. Finally, an overview over all ejector technologies, the relationship among the working fluids and the ejector performance, with a focus on past, present and future trends, is presented.

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“…The critical condenser temperature depends on the ejector geometry, type of working fluid and generator temperature. The critical condenser temperature for different refrigerants can be found in the several literatures such as by Chen [24], Huang [17] and Ouzzane [25]. The average yearly system performance is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

A year-round dynamic simulation of a solar-driven ejector refrigeration system with iso-butane as a refrigerant

Pridasawas¹,

Lundqvist²

2007

International Journal of Refrigeration

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Experimental study of the performance characteristics of a steam-ejector refrigeration system

Cited by 97 publications

References 9 publications

Performance Predictions of Dry and Wet Vapors Ejectors Over Entire Operational Range

Performance Predictions of Dry and Wet Vapors Ejectors Over Entire Operational Range

Ejector refrigeration: A comprehensive review

A year-round dynamic simulation of a solar-driven ejector refrigeration system with iso-butane as a refrigerant

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