Performance of a solar ejector cooling-system in the southern region of Turkey

Ersoy, H. Kursad; Yalçın, Şakir; Yapıcı, Rafet; Özgören, Muammer

doi:10.1016/j.apenergy.2006.10.001

Cited by 71 publications

(13 citation statements)

References 15 publications

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“…The COP ejector was found to be an exponential function of T g , T c and T e . Ersoy et al [142] studied an SoERS using R123 in the Turkish area in August. The η solar of an evacuated tube solar collector varied depending on the ambient condition and the solar radiation.…”

Section: Standard Soersmentioning

confidence: 99%

Ejector refrigeration: A comprehensive review

Besagni

Mereu

Inzoli

2016

Renewable and Sustainable Energy Reviews

385

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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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Section: Standard Soersmentioning

confidence: 99%

Ejector refrigeration: A comprehensive review

Besagni

Mereu

Inzoli

2016

Renewable and Sustainable Energy Reviews

385

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“…COP of the EERC and the performance improvement ratio according to the basic system are obtained from Equations (13)- (16). The algorithm of code for the ejector expansion cycle for given evaporator and condenser temperatures and that of ejector components' efficiencies (Z n ; Z s ; Z d ) is as follows:…”

Section: Computational Proceduresmentioning

confidence: 99%

Performance improvement of the vapour compression refrigeration cycle by a two-phase constant area ejector

Bilir

Ersoy

2009

Int. J. Energy Res.

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SUMMARYThe performance of a vapour compression system that uses an ejector as an expansion device was investigated. In the analysis, a two-phase constant area ejector flow model was used. R134a was selected as the refrigerant. According to the obtained results, for any operating temperature there are different optimum values of pressure drop in the suction chamber, ejector area ratio, ejector outlet pressure and cooling coefficient of performance (COP). As the difference between condenser and evaporator temperatures increases, the improvement ratio in COP rises whereas ejector area ratio drops. The minimum COP improvement ratio in the investigated field was 10.1%, while its maximum was 22.34%. Even in the case of an off-design operation, the performance of a system with ejector is higher than that of the basic system.

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“…It is assumed for the calculation that the evacuated solar collector surface is placed with tilted angle of 23 0 degree and oriented to the south direction. The solar radiation production on collector surface area and the heat output from solar collectors can be determined using the Hottel-Whillier equation [12,30,31]:…”

Section: Methodsmentioning

confidence: 99%

Investigation of Absorption Cooling Application Powered by Solar Energy in the South Coast Region of Turkey

Babayigit

Aksoy

Özgören

et al. 2013

EPJ Web of Conferences

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Abstract. In this study, an absorption system using ammonia-water (NH 3 -H 2 O) solution has been theoretically examined in order to meet the cooling need of a detached building having 150 m 2 floor area for Antalya,Mersin and Mugla provinces in Turkey. Hourly dynamic cooling load capacities of the building were determined by using Radiant Time Series (RTS) method in the chosen cities. For the analysis, hourly average meteorological data such as atmospheric air temperature and solar radiation belonging to the years 1998-2008 are used for performance prediction of the proposed system. Thermodynamic relations for each component of absorption cooling system is explained and coefficients of performance of the system are calculated. The maximum daily total radiation data were calculated as 7173 W/m 2 day on July 15, 7277 W/m 2 day on July 19and 7231 W/m 2 day on July 19 for Mersin, Antalya and Mugla, respectively on the 23° toward to south oriented panels from horizontal surface. The generator operating temperatures are considered between 90-130°C and the best result for 110°C is found the optimum degree for maximum coefficient of performance (COP) values at the highest solar radiation occurred time during the considered days for each province. The COP values varies between 0.521 and 0.530 for the provinces. In addition, absorber and condenser capacities and thermal efficiency for the absorption cooling system were calculated. The necessary evacuated tube collector area for the different provinces were found in the range of 45 m 2 to 47 m 2 . It is shown that although the initial investment cost is higher for the proposed absorption cooling system, it is economically feasible because of its lower annual operation costs and can successfully be operated for the considered provinces.

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Performance of a solar ejector cooling-system in the southern region of Turkey

Cited by 71 publications

References 15 publications

Ejector refrigeration: A comprehensive review

Ejector refrigeration: A comprehensive review

Performance improvement of the vapour compression refrigeration cycle by a two-phase constant area ejector

Investigation of Absorption Cooling Application Powered by Solar Energy in the South Coast Region of Turkey

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