Improving the thermal performance of diffusion absorption refrigeration system with alumina nanofluids: An experimental study

Sözen, Adnan; Özbaş, Engin; Menlik, Tayfun; ÇAKIR, Mutlu Tarık; Gürü, Metin; Boran, Kurtuluş

doi:10.1016/j.ijrefrig.2014.04.018

Cited by 64 publications

(15 citation statements)

References 9 publications

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“…Due to nanoparticles, the operation time was reduced and provided better absorption of heat from the generator. COP of a system working with nanoparticles were 51% higher than COP of the system working without nano-particles [30], but NH 3 -NaSCN crystallize readily, which affects system performance. A study suggested that LiBr/H 2 O can be used as working fluid mixture in the diffusion absorption refrigeration system for generation temperature between 66 o C to 78 o C. Dimethyl acetamide/ chloro-difluoro methane (R22) as working can achieve evaporator temperature below 0 o C at generation temperature of 50-90 o C and a COP of 35% [31,32].…”

Section: Literature Reviewmentioning

confidence: 96%

A Review of Working Fluid Combinations used in Diffusion Absorption Refrigeration Technologies

Tiwari¹

2017

IJRASET

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A review of working fluids used in the diffusion absorption refrigeration technologies has been done in this work in order to determine the availability of viable working fluid that can give high cooling power while maintaining efficient system performance. In recent years the interest in diffusion absorption refrigeration has increased as a complementary refrigeration system that can utilize the low-grade heat for cooling. Many reviewers have studied in the work to review the viable working fluids that can be used in the system and concluding that there isanumber of fluids that show good working characteristics such as TFE-TEGDME, which has only been studied theoretically and is yet to be studied experimentally shows potential for being good working fluids. It can be said though diffusion absorption refrigeration is relatively new refrigeration technology as compared to conventionally used absorption system but the studies conducted till now shows its potential for being a very good alternative for low power refrigeration, a cooling system which is eco-friendly, noiseless and can use the low-grade heat which can make up for its low coefficient of performance.

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Section: Literature Reviewmentioning

confidence: 96%

A Review of Working Fluid Combinations used in Diffusion Absorption Refrigeration Technologies

Tiwari¹

2017

IJRASET

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“…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%

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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“…Torii [6] investigated the possibility of using nanofluids as the working fluid in heat exchangers. Sözen et al [7] assessed the impact of a mixture of cooling/absorption fluid with Al 2 O 3 nanoparticles. Saidur et al [8] presented a review on the application of nanofluids and the challenges involved in their usage.…”

Section: Introductionmentioning

confidence: 99%

Review of the Thermo-Physical Properties and Performance Characteristics of a Refrigeration System Using Refrigerant-Based Nanofluids

Patil

Kim

Seo³

et al. 2015

Energies

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Nanofluids are considered a promising choice for several heat transfer applications. With the increasing awareness for energy saving and efficiency improvement in various thermal systems, including refrigeration systems, there is a growing interest in the refrigerant-based nanofluids owing to their superior thermo-physical properties. Nanorefrigerants are a class of nanofluid, which consist of suspended nanoparticles in a base refrigerant. In this paper, it is intended to include many articles on refrigeration systems that use nanorefrigerants, published in the period from 2005 to 2015. Although this is an extensive review, it could not include all the papers, and only some major research works were selected. It is believed that the dependency of thermal conductivity and other properties on temperature will make the thermal systems more efficient while operating at a high temperature. The literature reviews associated with the performance characteristics of nanorefrigerants in refrigeration systems for the last 10 years have been compiled and presented in this paper. Furthermore, recent studies related to thermo-physical properties of nanorefrigerants and nanolubricants have also been summarized and reviewed in this paper.

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Improving the thermal performance of diffusion absorption refrigeration system with alumina nanofluids: An experimental study

Cited by 64 publications

References 9 publications

A Review of Working Fluid Combinations used in Diffusion Absorption Refrigeration Technologies

A Review of Working Fluid Combinations used in Diffusion Absorption Refrigeration Technologies

Experimental Study Of Diffusion Absorption Refrigeration Systems Using Solar Energy

Review of the Thermo-Physical Properties and Performance Characteristics of a Refrigeration System Using Refrigerant-Based Nanofluids

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