Development of a micro-scale heat exchanger based, residential capacity ammonia–water absorption chiller

Staedter, Marcel A.; Garimella, Srinivas

doi:10.1016/j.ijrefrig.2018.02.016

Cited by 26 publications

(5 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Bu çalışma, absorbsiyonlu soğutma teknolojisinin küçük kapasiteli sistemler için de uygun bir alternatif oluşturabileceğini göstermiştir. Staedter ve Garimella [9], mikro kanallı eşanjör teknolojisi üzerine geliştirilmiş 7 kW soğutma kapasitesine sahip monolit yapıda bir absorbsiyonlu soğutma sistemi geliştirmiş, deneysel ve sayısal olarak incelemiştir. Sistemde eriyik olarak amonyak-su kullanılmış olup, sistemin COP değeri 0,44 olarak hesaplanmıştır.…”

Section: Li̇teratür Araştirmasi (Related Work)unclassified

Absorbsi̇yonlu Soğutma Si̇stemleri̇nde Mi̇kro Kanalli Absorber Ve Desorberi̇n Sayisal Olarak Modellenmesi̇

Türkmen,

Atılgan

2024

Politeknik Dergisi

View full text Add to dashboard Cite

Çalışma kapsamında mikro kanallı ve membran tabanlı absorber ve desorber farklı kanal yükseklikleri (0,5mm – 1mm – 1,5mm), farklı eriyik giriş hızları (0,003-0,072 m/s ve 0,0075-0,0125 m/s), farklı eriyik çeşitleri (LiBr-Su, LiBr/LiNO3/LiI/LiCl-Su, [EMIM][OAc]-Su, LiCl-Su) ve farklı kanal tiplerine (düz kanal, içerisinde bölgesel tümsekler içeren kanal, kanal boyunca kavisler içeren kanal) göre optimizasyon çalışması gerçekleştirilmiş ve sonuçlar değerlendirilmiştir. Sonuç olarak eriyik giriş hızları ve kanal yükseklerinde optimum koşullar belirlenmiş ve özellikle [EMIM][OAc]-Su eriyiğinin absorbsiyon oranı ve basınç düşüşü verilerine göre, LiCl-Su eriyiğinin ise desorbsiyon oranı verilerine göre avantajlı olduğu tespit edilmiştir. Bununla birlikte kanal yapısındaki değişikliklerin absorbsiyon oranlarında anlamlı bir artış sağladığı, bununla birlikte basınç düşüşü konusunda negatif etkisi tüm sonuçlarda görülmüştür.

show abstract

Section: Li̇teratür Araştirmasi (Related Work)unclassified

Absorbsi̇yonlu Soğutma Si̇stemleri̇nde Mi̇kro Kanalli Absorber Ve Desorberi̇n Sayisal Olarak Modellenmesi̇

Türkmen,

Atılgan

2024

Politeknik Dergisi

View full text Add to dashboard Cite

show abstract

“…Figure 2 Schematic of vapour absorption refrigeration system [11] For the successful commercialisation of the VARS for automobile applications, it is essential to develop less bulky and compact unit that can be housed within the available packaging volume on the different types of vehicles. Staedter and Garimella [12] developed compact VARS based on microchannel heat exchanger technology with a cooling capacity of 7 kW as shown in Figure 3. The overall volume of the developed system was 0.28 m 3 (with dimensions of 0.66 m x 0.66m x 0.66 m).…”

Section: Absorption Refrigeration Systems Coupled To Engine Exhaustmentioning

confidence: 99%

“…Figure 3 Compact VARS developed by Staedter and Garimella [12] The idea of using VARS for a refrigerated truck has already been explored by researchers albeit with less success. On a conventional truck, powered by a diesel engine, the source of residual thermal energy is mainly from two placesthe engine exhaust and the engine cooling loop.…”

Section: Absorption Refrigeration Systems Coupled To Engine Exhaustmentioning

confidence: 99%

Coupling of engine exhaust and fuel cell exhaust with vapour absorption refrigeration/air conditioning systems for transport applications: A review

Venkataraman

Pandya

Amakiri

et al. 2020

Thermal Science and Engineering Progress

View full text Add to dashboard Cite

Link to publication on Research at Birmingham portal General rightsUnless a licence is specified above, all rights (including copyright and moral rights) in this document are retained by the authors and/or the copyright holders. The express permission of the copyright holder must be obtained for any use of this material other than for purposes permitted by law.• Users may freely distribute the URL that is used to identify this publication.• Users may download and/or print one copy of the publication from the University of Birmingham research portal for the purpose of private study or non-commercial research.• User may use extracts from the document in line with the concept of 'fair dealing' under the Copyright, Designs and Patents Act 1988 (?) • Users may not further distribute the material nor use it for the purposes of commercial gain.Where a licence is displayed above, please note the terms and conditions of the licence govern your use of this document.When citing, please reference the published version. Take down policyWhile the University of Birmingham exercises care and attention in making items available there are rare occasions when an item has been uploaded in error or has been deemed to be commercially or otherwise sensitive.

show abstract

“…Size reduction: small-scale ammonia/water systems were developed so that the chillers were mobile or met the residential requirement. The heat and mass transfer devices were microscale and are non-commercial, thus new design methods were required [13,14]. A counter-current desorber purified the refrigerant vapour and reduced the rectifier load, which facilitates compact units.…”

mentioning

confidence: 99%

Compact Ammonia/Water Absorption Chiller of Different Cycle Configurations: Parametric Analysis Based on Heat Transfer Performance

2022

View full text Add to dashboard Cite

Ammonia/water absorption chillers are driven by low-grade heat and cover wide refrigeration temperatures. This paper analyses single-stage ammonia/water absorption chillers. A numerical model was developed based on the heat exchanger performance. The model captures variational heat exchanger performances and describes the actual cycle with varying boundary conditions. The detrimental effects of refrigerant impurity were analysed quantitatively under different operating conditions. The model was validated with experimental data. A basic cycle and three advanced cycles were analysed for sub-zero refrigeration by comparing the thermodynamic performances. A compression-assisted cycle extended the activation temperature from 80 to 60 °C. At the heat source of 120 °C, when a counter-current desorber or bypassed rich solution was used, the COP increased from 0.51 to 0.58 or 0.57, respectively. The operating parameters included the heat source temperatures, heat sink temperatures, the mass flow rates and mass concentrations of rich solutions. Higher heat source temperatures increase cooling capacity. The increase was around 20 kW for the basic cycle of sub-zero refrigeration. There is an optimum heat source temperature maximising the COP. Higher heat source temperatures increased the refrigerant mass flow rate and reduced the mass concentration. The mass concentration can decrease from 0.999 to 0.960.

show abstract

Development of a micro-scale heat exchanger based, residential capacity ammonia–water absorption chiller

Cited by 26 publications

References 20 publications

Absorbsi̇yonlu Soğutma Si̇stemleri̇nde Mi̇kro Kanalli Absorber Ve Desorberi̇n Sayisal Olarak Modellenmesi̇

Absorbsi̇yonlu Soğutma Si̇stemleri̇nde Mi̇kro Kanalli Absorber Ve Desorberi̇n Sayisal Olarak Modellenmesi̇

Coupling of engine exhaust and fuel cell exhaust with vapour absorption refrigeration/air conditioning systems for transport applications: A review

Compact Ammonia/Water Absorption Chiller of Different Cycle Configurations: Parametric Analysis Based on Heat Transfer Performance

Contact Info

Product

Resources

About