Energy, exergy, economic and environmental (4E) analyses based comparative performance study and optimization of vapor compression-absorption integrated refrigeration system

Jain, Vaibhav; Sachdeva, Gulshan; Kachhwaha, Surendra Singh

doi:10.1016/j.energy.2015.08.041

Cited by 84 publications

(21 citation statements)

References 38 publications

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“…At the end of the superstructure, the heat removed by cooling water is determined by Equation 20, and the heat removed by the evaporation processes of CACRS are given by Equation (21). With Equations (22) and (23), the heating requirement of each cold process stream at the stream end are satisfied by LPS and HPS are determined.…”

Section: Of 17mentioning

confidence: 99%

Heat Exchanger Network Synthesis Integrated with Compression–Absorption Cascade Refrigeration System

et al. 2020

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Compression–absorption cascade refrigeration system (CACRS) is the extension of absorption refrigeration system, which can be utilized to recover excess heat of heat exchanger networks (HENs) and compensate refrigeration demand. In this work, a stage-wise superstructure is presented to integrate the generation and evaporation processes of CACRS within HEN, where the generator is driven by hot process streams, and the evaporation processes provide cooling energy to HEN. Considering that the operating condition of CACRS has significant effect on the coefficient of performance (COP) of CACRS and so do the structure of HEN, CACRS and HEN are considered as a whole system in this study, where the operating condition and performance of CACRS and the structure of HEN are optimized simultaneously. The quantitative relationship between COP and operating variables of CACRS is determined by process simulation and data fitting. To accomplish the optimal design purpose, a mixed integer non-linear programming (MINLP) model is formulated according to the proposed superstructure, with the objective of minimizing total annual cost (TAC). At last, two case studies are presented to demonstrate that desired HEN can be achieved by applying the proposed method, and the results show that the integrated HEN-CACRS system is capable to utilize energy reasonably and reduce the total annualized cost by 38.6% and 37.9% respectively since it could recover waste heat from hot process stream to produce the cooling energy required by the system.

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Section: Of 17mentioning

confidence: 99%

Heat Exchanger Network Synthesis Integrated with Compression–Absorption Cascade Refrigeration System

et al. 2020

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“…Therefore, apart from the energy and economic benefits, the environmental issues should be considered completely as it has played an increasingly important role in global development [66].…”

Section: Heat Recovery Opportunities In the Developed Countriesmentioning

confidence: 99%

Heat recovery potentials and technologies in industrial zones

Huang

Zheng

Baleynaud

et al. 2017

Journal of the Energy Institute

101

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Low-temperature industrial waste heat is an important heat source for industrial processes and utility services to reduce the consumption of fossil energy as well as lower the risk of global warming. In this article, a review of waste heat recovery e a critical solution of waste energy disposal is made in order to show the current status of heat recovery potentials and the possible technologies used industries. The concept of industrial waste heat is defined, potential sources of waste heat from industries are identified and conclusions are drawn. Then, the technologies available for waste heat recovery are illustrated in terms of heat pumps, heat exchangers, heat pipes, boilers, refrigeration cycles, power cycles and heat storage according to the transfer mode of waste heat within the recovery process. The waste heat opportunities both in developed and developing countries are discussed in order to determine the possible benefits of heat recovery as well as to make a general survey of the development of heat recovery technologies globally. Research of typical applications of industrial waste heat recovery in Asian countries and especially in China is overviewed to show the performance of this engineering in practice.

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“…To this point, different absorption-compression hybrid cooling systems, which employ conventional vapor compression chillers as their backup cooling devices, are proposed as alternatives. In the so-called parallel hybrid systems, chilled water is successively cooled in the evaporators of absorption and compression chillers [6]. It was found that, for such configurations, the payback period achieved 36.2 years without subsidies, which is 61.3% less than that of conventional solar cooling with a backup heat source [7].…”

Section: Introductionmentioning

confidence: 99%

Performance of Solar Absorption-Subcooled Compression Hybrid Cooling System for Different Flow Rates of Hot Water

Zhang

Jing

et al. 2020

Applied Sciences

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The solar absorption-subcooled compression hybrid cooling system (SASCHCS) is tech-economically feasible for high-rise buildings. Since such a system operates with no auxiliary heat source, the performance coupling of its absorption subsystem and solar collectors is sensitive to the variation of hot water flow rate. In this regard, the relationship of system performance and hot water flow rate is required to be clarified exactly. Therefore, this paper aims to illustrate the effect mechanism of hot water flow rate and to propose the corresponding decision criterion. The case study is based on a typical high-rise office building in subtropical Guangzhou. The daily working process of this system with different hot water flow rates is simulated and analyzed. Subsequently, the useful heat of collectors and cooling capacity of the absorption subsystem with the hot water flow rate is discussed in detail. The results show that the SASCHCS operates with hot water temperatures ranging from 60 °C to 90 °C. The energy saving increases with the rise of hot water flow rate, but such variation tends to be flat for the excessively high flow rate. As the collector flow rate increases from 1 m3/h to 10 m3/h, the daily energy saving improves by 21% in August. Similarly, the daily energy saving increases by 37.5% as generator hot water flow rate increases from 1 m3/h to 10 m3/h. In addition, the collector flow rate of 3.6 m3/h (13.33 (kg/m2 h)) and the generator flow rate of 5.2 m3/h (19.26 (kg/m2 h)) are optimal for the annual operation, with considering power consumption of water pumps. This paper is helpful for the improvement of SASCHCS operating performance.

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Energy, exergy, economic and environmental (4E) analyses based comparative performance study and optimization of vapor compression-absorption integrated refrigeration system

Cited by 84 publications

References 38 publications

Heat Exchanger Network Synthesis Integrated with Compression–Absorption Cascade Refrigeration System

Heat Exchanger Network Synthesis Integrated with Compression–Absorption Cascade Refrigeration System

Heat recovery potentials and technologies in industrial zones

Performance of Solar Absorption-Subcooled Compression Hybrid Cooling System for Different Flow Rates of Hot Water

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