Performance investigation of a diffusion absorption refrigeration system using nano-size alumina particles in the refrigerant

Sözen, Adnan; Özbaş, Engin; Menlik, Tayfun; İskender, Ümit; Kılınç, Cuma; ÇAKIR, Mutlu Tarık

doi:10.1504/ijex.2015.072910

Cited by 5 publications

(5 citation statements)

References 12 publications

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“…The ammonia starting to evaporate enters the internal wall of the evaporator through 4c of the twowall evaporator and goes on until the absorber. The ammonia facing the poor solution at 6 is absorbed by water and goes back to the tank as rich solution [2,3,4].…”

Section: Dar Systems 21 Dar1mentioning

confidence: 99%

“…The vacuumed tube used in the experiment has a surface area of 0.1332 m 2 . Equation ( 3) is obtained when COP DAR is rewritten by using Equation (1) and Equation (2).…”

Section: Theoretical Analysismentioning

confidence: 99%

“…The REFPROP software, which simulates the physical and chemical properties of fluid groups, was used in order to determine the mass ratios (x) and enthalpies (h) to be employed in the equations. The amount of energy collected by the heat pipe, , is given in Equation (2). ΔT is the difference between the average vaporizer temperature and the average condenser temperature of the heat pipe.…”

Section: Figure 19 Necessary Measurement Points For Theoretical Analysis In Darmentioning

confidence: 99%

“…Additionally, hydrogen or helium is used as auxiliary gas in this system in order to decrease the partial pressure in the evaporator according to Dalton's law. Therefore, there are no moving parts in these systems, and solution cycle is achieved by the bubble pump heated at 150-200°C [2,3,4]. Heat pipes are used in electronic devices, heating and ventilation (HVAC) systems, and some other industrial sectors [5].…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study Of Diffusion Absorption Refrigeration Systems Using Solar Energy

Özbaş¹

2018

Journal of Polytechnic

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ÖZBu çalışmada, güneş enerjisi kullanılarak difüzyon soğurmalı soğutma (DAR) sisteminin performansı deneysel olarak araştırılmıştır. Bu amaçla, deneyde ön soğutmalı / ön soğutmasız olmak üzere iki tip sistem kullanılmıştır. Enerji kaynağı olarak güneş enerjisinden faydalanmak amacıyla çalışma akışkanı su olan iki fazlı kapalı tip termosifon tip ısı borusu tercih edilmiştir. Deneyler sırasında; DAR sistemleri ve ısı boruları üzerindeki kritik nokta sıcaklıkları ile birlikte çevre sıcaklığı, DAR sistemleri basınçları ve güneş radyasyonu verileri 06:00-16:00 saatleri arasında kaydedimiş ve her ısı borusu ile 82.5W güneş enerjisi toplanmıştır. DAR1 en düşük buharlaştırıcı giriş sıcaklığına (-14.8°C) 14:40'da ve DAR2 ise 13:55'de -0.9°C'ye ulaşmıştır. DAR1 ve DAR2'nin STK değerleri 0.2362 ve 0.2254 olarak bulunmuştur. DAR1 ve DAR2'de kullanılan ısı borularının verimliliği sırasıyla 0.3677 ve 0.3690 ve ısı direnci değerleri sırasıyla 0.1154W/°C, 0.0828W/°C'dir.Anahtar Kelimeler: Yayınımlı soğurmalı soğutma, ısı borusu, güneş enerjisi, performans. ABSTRACTIn this study, the performance of a diffusion absorption refrigeration (DAR) system using solar energy is investigated experimentally. For this purpose, two types of systems with/without sub-cooling are used for the experiment. Two-phase closed thermosyphon type heat pipes using water as the working fluid are used to utilize solar energy as heat source. During the experiments; ambient temperature along with critical point temperatures on DAR systems and heat pipes, DAR systems pressures and solar radiation data are recorded from 06:00 to 16:00 and each heat pipe has collected 82.5W of solar energy. DAR1 has achieved its lowest evaporator inlet temperature (-14

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Section: Dar Systems 21 Dar1mentioning

confidence: 99%

“…The vacuumed tube used in the experiment has a surface area of 0.1332 m 2 . Equation ( 3) is obtained when COP DAR is rewritten by using Equation (1) and Equation (2).…”

Section: Theoretical Analysismentioning

confidence: 99%

Section: Figure 19 Necessary Measurement Points For Theoretical Analysis In Darmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental Study Of Diffusion Absorption Refrigeration Systems Using Solar Energy

Özbaş¹

2018

Journal of Polytechnic

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“…Newly, Refrigeration binary fluids that have dispersed nanoparticles have acquired an interest in refrigeration and air conditioning fields due to their excellent thermophysical properties. These advantages make them used in these kinds of systems with many studies for performance improvement [1][2][3][4][5]. Yang et al [6] prepared various types of nanofluids by mix up poly acrylic acid (PAA) and Al2O3 nanoparticles with poly ethylene glycol (PEG 1000), also, TiN, and SiC, with PEG 10000 to the hydroxyapatite NH3/H2O solution, respectively.…”

Section: Introductionmentioning

confidence: 99%

Thermophysical Properties of Nanoferrofluid (Fe3O4 –Acetone/Znbr2) as a Working Fluid for Use in Absorption Refrigeration Applications

Mehyo

Özcan

2021

International Journal of Thermodynamics

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In this paper, thermophysical analyses were achieved for the mixture of (Fe3O4-acetone/ZnBr2) refrigeration working solution and examine its efficiency characteristics as a nanoferrofluid for use in absorption refrigeration applications driven by different low temperatures sources. Where it shows an investigation of the chosen nanoferrofluid containing the preparation, stability, structure, and properties. The reasons behind choosing Fe3O4 nanoparticles are that acetone is a good dispersivity medium for this kind of nanoparticles, also, their excellent thermophysical properties and magnetic property which give an ability to utilize them combined with applying an external magnetic field as a method for long and acceptable suspension stability of these nanoparticles in the base fluid thus enhancement in the heat transfer process in the generator of Absorption Refrigeration System (ARS). As a multi-factor experimental study, the experiments are designed to visually inspect the suspension nanoparticle's stability in the base fluid. Then presenting the thermophysical analysis of different properties of the mixture (thermal conductivity, density, dynamic viscosity, and specific heat capacity). The results elucidate that the studied nanoferrofluid has good dispersion and an enhancement in thermal conductivity that reaches 10.179 % at 0.2 (wt.%) of nanoparticle concentration. Also, by increasing nanoparticle concentration, the density increased, heat capacity decreased, as expected, and viscosity significantly increased.

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Performance investigation of utilizing nanoferrofluid as a working solution in a diffusion absorption refrigeration system under an external magnetic field effect

2022

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Performance investigation of a diffusion absorption refrigeration system using nano-size alumina particles in the refrigerant

Cited by 5 publications

References 12 publications

Experimental Study Of Diffusion Absorption Refrigeration Systems Using Solar Energy

Experimental Study Of Diffusion Absorption Refrigeration Systems Using Solar Energy

Thermophysical Properties of Nanoferrofluid (Fe3O4 –Acetone/Znbr2) as a Working Fluid for Use in Absorption Refrigeration Applications

Performance investigation of utilizing nanoferrofluid as a working solution in a diffusion absorption refrigeration system under an external magnetic field effect

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