Entropy production analysis and experimental confirmation of absorption systems

Chua, Hui Tong; Gordon, Jeffrey M.; Ng, Kim Choon; Han, Qian

doi:10.1016/s0140-7007(96)00075-8

Cited by 26 publications

(13 citation statements)

References 28 publications

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“…They suppose generally adiabaticity of each stage (qLJ = 0), and use an irreversibility parameter I, according to : (14) It is to be noticed, that II 21 whatever is I. according to [6], a total irreversibility parameter of the working fluids of the whole system is expressed by : n I=TII i=l I (15) According to this model [6], a general optimum relation is derived for a given specific heating load (heat pump constraint) and a given total heat transfer area for heat exchangers (HEX) ; this last constraint corresponds to a dimensionnal constraint. It can be related to corresponding economic constraint [1].…”

Section: -----------1'; -----------""I+lmentioning

confidence: 99%

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Advanced Thermodynamics of Reverse Cycle Machine

Feidt¹

2003

Low Temperature and Cryogenic Refrigeration

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Section: -----------1'; -----------""I+lmentioning

confidence: 99%

“…The main remarks to do, is the fact that a strong interest is growing in direction of heat powered refrigeration cycles [12] ; in order to optimize the corresponding configurations, a precise entropy analysis of the system seems a good way to explore [13,14,15,16].…”

Section: Practical Extensionsmentioning

confidence: 99%

Advanced Thermodynamics of Reverse Cycle Machine

Feidt¹

2003

Low Temperature and Cryogenic Refrigeration

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“…An entropic balance that takes into account the entropy generation between internal #uids and between these and the external #uids is also useful to obtain conclusions about other parameters such as the COP, as was proposed by Meunier et al (1996) and Chua et al (1997). However, there is little bibliography on the irreversibilities generated in these cycles, which can only be evaluated on the basis of the Second Law.…”

Section: Introductionmentioning

confidence: 99%

Entropy generated and exergy destroyed in lithium bromide thermal compressors driven by the exhaust gases of an engine

Izquierdo

Vega

Lecuona

et al. 2000

Int. J. Energy Res.

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“…Three-thermal system has been originally modelled as the combined cycle of an endo-reversible two-heat sources engine driving an endo-reversible two-heat sources refrigerator/ heat pump [6]. In addition, [7] applies entropy production analysis with an analytic irreversible thermodynamic model. By applying thermodynamic analysis to absorption chillers [8] have shown the necessity of accounting for internal dissipation, and defined the concept of Process Average Temperature (PAT).…”

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confidence: 99%

Thermodynamic Analysis of Irreversible Heat-transformers

Giannetti

Arnas

Rocchetti

et al. 2015

MST

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Absorption heat transformers extend the possibilities for efficient and environment-friendly energy conversion processes. Based on a general thermodynamic model of three-thermal cycles with finite thermal capacity of the heat sources, this paper is intent upon analyzing and optimizing the performance of absorption heat transformers, by including the influence of irreversibility in the analytical expression of the system efficiency. Dimensionless parameters for an overall optimization are defined and a first screening is performed to clarify their influence. Dependence on the main factors is highlighted to suggest how to change them in order to enhance the whole system performance. Under this point of view, the analysis evaluates coefficient of performance (COP) improvements and can be used to perform existing plant diagnostics, besides predicting the system performance. The use of this criterion is exemplified for specific heat transformers data from literature. This approach identifies the limitations imposed to the physical processes by accounting for the inevitable dissipation due to their constrained duration and intensity, and constitutes a general thermodynamic criterion for the optimization of three-thermal irreversible systems. AbstrakAnalisis Termodinamika Ireversibel Heat-transformator. Penyerapan panas transformator memperluas kemungkinan adanya proses konversi energi yang efisien dan ramah lingkungan. Berdasarkan model termodinamika umum siklus three-thermal dengan kapasitas termal yang terbatas dari sumber panas, tulisan ini bertujuan untuk menganalisis dan mengoptimalkan kinerja penyerapan panas transformator, dengan memasukkan pengaruh ireversibilitas dalam ekspresi sistem analitis efisiensi. Parameter berdimensi untuk optimasi secara menyeluruh dan yang pertama dilakukan adalah penyaringan untuk memperjelas pengaruh masing-masing. Ketergantungan pada faktor utama menyoroti dan menunjukkan bagaimana mengubah mereka untuk meningkatkan kinerja sistem secara keseluruhan. Melalui sudut pandang ini, analisis evaluasi perbaikan COP dapat digunakan untuk melakukan diagnosis tanaman yang ada, selain memprediksi kinerja sistem secara keseluruhan. Pendekatan ini mengidentifikasi keterbatasan dalam proses fisik, yang berkontribusi untuk pembuangan tidak terelakkan terkendala lamanya penyinaran dan intensitas, merupakan sebuah kriteria termodinamika umum untuk optimalisasi sistem three-thermal ireversibel.

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Entropy production analysis and experimental confirmation of absorption systems

Cited by 26 publications

References 28 publications

Advanced Thermodynamics of Reverse Cycle Machine

Advanced Thermodynamics of Reverse Cycle Machine

Entropy generated and exergy destroyed in lithium bromide thermal compressors driven by the exhaust gases of an engine

Thermodynamic Analysis of Irreversible Heat-transformers

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