Thermodynamic and thermoeconomic analysis of innovative integration of Kalina and absorption refrigeration cycles for simultaneously cooling and power generation

Dhahad, Hayder A.; Hussen, Hasanen M.; Nguyen, Phong Thanh; Ghaebi, Hadi; Ashraf, Muhammad Aqeel

doi:10.1016/j.enconman.2019.112241

Cited by 49 publications

(20 citation statements)

References 41 publications

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“…The rank of the curriculum's components under fuzzy extended analysis method is summarized in Table 2. Vietnam seeks to integrate with the world economic system (Dhahad, Hussen, Nguyen, Ghaebi, & Ashraf, 2020;Nguyen & Ngoc, 2020;Nguyen, Quan, Le, & Van, 2020;To, Ha, Nguyen, & Vo, 2019). Therefore, the requirement of foreign languages, especially English, was the leading factor for assessing the quality of labor resources.…”

Section: Resultsmentioning

confidence: 99%

Applying the Fuzzy Decision-Making Method for Program Evaluation and Management Policy of Vietnamese Higher Education

Tong¹,

Nguyen²,

Nguyen³

et al. 2020

JAFEB

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Education policy is a dynamic process featuring social development trends. The world countries have focused their education program on empowering the learners for future life and work. This paper aims to assess the higher education curriculum based on a survey of 280 students, employers, alumni, and lecturers in both social sciences and natural sciences in Ho Chi Minh City, Vietnam. The fuzzy decisionmaking method, namely the Fuzzy Extent Analysis Method (F-EAM), was applied to measure the relative weight of each parameter. Seven factors under the curriculum development have been put in the ranking. Input with emphasis on foreign language was the highest priority in curriculum development, given the expected demand of the labor market. Objective and learning outcome and teaching activities ranked second and third, respectively. The traditional triangle of teaching content, methodology, and evaluation and assessment are still proven their roles, but certain modifications have been defined in the advanced curriculum. Teaching facilities had the least weight among the seven dimensions of curriculum development. The findings are helpful for education managers to efficiently allocate scarce resources to reform the curriculum to bridge the undergraduate quality gap between labor supply and demand, meeting the dynamic trends of social development.

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Section: Resultsmentioning

confidence: 99%

Applying the Fuzzy Decision-Making Method for Program Evaluation and Management Policy of Vietnamese Higher Education

Tong¹,

Nguyen²,

Nguyen³

et al. 2020

JAFEB

Self Cite

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“…From the studies integrating a Kalina cycle with an ARC using NH 3 ‐H 2 O, it can be seen that the highest energy efficiency of 41.33% was obtained with the configuration proposed by Dhahad et al 63 with a Kalina internal cycle driven by the vapor produced by the separation tank of the ACC. Despite having obtained the highest efficiency, according to the authors, because of the low power produced, the proposed system is more suitable for cooling production rather than for power production.…”

Section: Hybrid Systems Integrated By Two Cyclesmentioning

confidence: 99%

“…Besides, it was found that the evaporator was the component with the highest ExD comprising 59% of the total ExD. Dhahad et al 63 carried out energy, exergy and a thermo‐economic study of a combined Kalina and ARC. The system includes a flashing tank where the vapor is used to drive an internal Kalina cycle.…”

Section: Hybrid Systems Integrated By Two Cyclesmentioning

confidence: 99%

“…Regarding exergy analysis, Kumar et al 64 reported the highest exergy efficiency of 48% for the experimental system developed. On the other hand, from the exergy analysis in the entire cycle, Cao et al 62 found that the evaporator was the component with the highest ExD, comprising 59% of the overall exergy destruction, while Dhahad et al 63 found that the absorber was the component with the highest ExD.…”

Section: Hybrid Systems Integrated By Two Cyclesmentioning

confidence: 99%

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Thermodynamic cycles for the simultaneous production of power and cooling: A comprehensive review

Pacheco‐Reyes

Rivera

2021

Int J Energy Res

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Summary A comprehensive review of thermodynamic cycles for the simultaneous production of power and cooling is presented. The study not only actualizes the bibliographic reviews previously realized by other authors regarding cycles such as Kalina, Goswami, or modifications of them. This review additionally includes an overview of hybrid cycles and other novel cycles reported in the literature. The hybrid cycles included in the study are systems integrated by two or three conventional cycles, mainly composed of Brayton, Rankine, and ORC for power generation; and compression, absorption, and ejector cycles for cooling production. The other novel cycles mentioned are thermodynamic cycles, which considerably differ from all the others. By using internal rectification, the Goswami cycle increased its efficiency by about 5%; however, by adding diverse components, as a condenser and a subcooler, the efficiency was significantly improved due to the considerable increase of the cooling production. Organic Rankine cycles integrating absorption refrigeration cycles are, in general, the most efficient hybrid cycles, reaching thermal efficiencies close to 40% for the simultaneous production of power and cooling. If a third output was provided, as heating or water distillation, the energy efficiencies were as high as 90%. The main problem with these systems is that, in general, they are too complex and costly because of the considerable number of components. The highest exergy destruction values are reported in solar collectors when used, followed by boilers or generators, and absorbers. The lower production costs were reported with systems integrating a Brayton cycle, an organic Rankine cycle, and an ejector‐cooling cycle. The disadvantage of these systems is that they need high operating temperatures.

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“…The global e-learning market in 2015 was estimated at over 165 billion USD and expects to maintain an average annual growth rate of 5% between 2018 and 2023. Such growth stems from not only technological evolution, educational innovations, but also economic dynamics (Dhahad, Hussen, Nguyen, Ghaebi, & Ashraf, 2020;Diem & Ha, 2013;To, Ha, Nguyen, & Vo, 2019;Wahyudi et al, 2019). Kasraie and Kasraie (2010) argued that the e-learning economy is composed of three sectors: services, educational contents and infrastructure, and e-learning pursues a transition to services.…”

Section: Economymentioning

confidence: 99%

E-Learning Evolution and Development From the Perspectives of Technology, Education, and Economy

Huynh

Nguyen²,

Nguyen³

et al. 2020

RWE

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E-learning has been and is an indispensable tool in the knowledge economy. It is attracting the special attention from many universities and educational institutions toward the goal of "learner-centric" because it is highly interactive, based on multimedia, enables learners to give exchange information more easily, and provides learning content that is appropriate to the capabilities and interests of each person. For more than forty years, e-learning has undergone a striking development that has paralleled technological breakthroughs. It, however, comes into the practice of education only upon integration into educational advances and based on the foundation of economic from three pillars: technology, education and economy, thereby highlighting the interactions among these factors and recommending orientations and synchronous solutions in this paper.

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Thermodynamic and thermoeconomic analysis of innovative integration of Kalina and absorption refrigeration cycles for simultaneously cooling and power generation

Cited by 49 publications

References 41 publications

Applying the Fuzzy Decision-Making Method for Program Evaluation and Management Policy of Vietnamese Higher Education

Applying the Fuzzy Decision-Making Method for Program Evaluation and Management Policy of Vietnamese Higher Education

Thermodynamic cycles for the simultaneous production of power and cooling: A comprehensive review

E-Learning Evolution and Development From the Perspectives of Technology, Education, and Economy

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