Experimental analysis of diffusion absorption refrigerator driven by electrical heater and engine exhaust gas

Adjibade, Mohamed Izzedine Serge; Thiam, Ababacar; Awanto, Christophe; Azilinon, Dorothé

doi:10.1016/j.csite.2017.07.004

Cited by 17 publications

(9 citation statements)

References 16 publications

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“…Then, the refrigerant bubbles are rising and lift the solution through the bubblepump's inner tube. When exiting this tube, there is a separation between the vapour refrigerant (4) and the refrigerant-weak solution (3). When using water or a similar relatively volatile absorbent, before entering the condenser, the ascending vapour refrigerant should pass through a rectifier.…”

Section: Diffusion-absorption Refrigeration (Dar) Cyclementioning

confidence: 99%

“…), or to be able to combine various technologies (combination of compression and absorption machines) or to combine several energy sources. It is essential to underline that absorption machines' development is becoming increasingly important for air conditioning and conservation applications [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…Several works in the literature explore diffusion absorption refrigeration machines using different energy sources [2][3][4]. For example, Dhindsa [43] discussed the different energy sources, including flat plate collectors, heat storage mediums, motor waste heat, phase change materials, and thermochemical absorption solar hybrid refrigeration systems.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Diffusion Absorption Refrigeration Systems: An Overview of Thermal Mechanisms and Models

2023

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The energy transition, originating in the limitation of fossil resources and greenhouse gas (GHG) emission reduction, is the basis of many studies on renewable energies in different industrial applications. The diffusion absorption refrigeration machines are very promising insofar as they allow the use of renewable resources (solar, geothermal, waste gas, etc.). This technology is often considered an alternative to vapor compression systems in cooling and refrigeration applications. This paper aims to overview the thermal mechanisms related to modeling system energy sources and highlight the primary methodologies and techniques used. We study and analyze the technology’s current challenges and future directions and, finally, identify the gaps in the existing models to pave the way for future research. The paper also gives a classification of absorption refrigeration systems (ARS) to position and limit the scope of the study. The paper will help researchers who approach the various aspects to have a global synthetic analysis of the mechanisms characterizing the modeling of energy sources of absorption refrigeration machines.

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Section: Diffusion-absorption Refrigeration (Dar) Cyclementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Diffusion Absorption Refrigeration Systems: An Overview of Thermal Mechanisms and Models

2023

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“…Research also explores integrating different technologies, such as combining compression and absorption machines or leveraging multiple energy sources. Notably, the development of absorption machines is gaining increasing importance, particularly in applications related to air conditioning and preservation [19][20][21][22][23][24][25]. Figure 2 illustrates a schematic diagram of the DAR cycle, featuring a generator, rectifier, condenser, and evaporator coupled with a gas heat exchanger, absorber, reservoir, and solution heat exchanger.…”

Section: Introductionmentioning

confidence: 99%

Innovative Multigeneration System with Heat Exchangers for Harnessing Thermal Energy from Cement Kiln Exhaust Gases

Mungyeko Bisulandu,

Mansouri,

Tsimba Mboko

et al. 2024

Energies

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This article introduces a novel multiple-cycle generation system for efficient heat recovery at high and low temperatures. The system is modeled and optimized using the M2EP analysis method (mass, energy, exergy, and performance) and the particle swarm optimization algorithm. The multigeneration system produces electricity, cold, domestic hot water, and biogas by utilizing Kalina cycles, diffusion–absorption refrigeration machines, and high-performance heat exchangers by harnessing waste heat from cement kiln exhaust gases. The Kalina cycle is employed for electricity generation, wherein the H2O+NH3 mixture, heated by hot water, circulates through heat exchangers. Downstream of the Kalina cycle, the refrigeration machine generates cold by evaporating the strong solution of the H2O+NH3 mixture. Hydrogen circulates in the diffusion–absorption refrigerator (DAR) circuit, facilitating the exchange between the evaporator and the absorber. The domestic hot water and biogas production systems operate at lower temperatures (around 45 °C). The simulation results for the Kalina cycle indicate an electrical energy production of 2565.03 kW, with a release of usable energy (residual gases) estimated at 7368.20 kW and a thermal efficiency of 22.15%. Exergy destruction is highest at heat exchanger 1, accounting for 26% of the total. A coefficient of performance of 0.268 and an evaporator temperature of 10.57 °C were obtained for the DAR cycle. The absorber contributes the most to energy exchanges, comprising 37% of the entire circuit. Summarizing the potential for valorizing waste heat from cement kilns, this article lays the foundation for future research.

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“…The second category are larger systems with cold storage volumes up to 200 L and cooling capacities as high as 100 W. These systems are more commonly marketed for use in recreational vehicles, caravans or other mobile applications, with the option of electrical heaters or gas burners for heat input. Of the relatively few experimental investigations of DAR systems in the literature (in addition to those mentioned above) the majority feature the former, smaller, type of system [40][41][42][43][44][45][46][47].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of an ammonia-water-hydrogen diffusion absorption refrigerator

et al. 2019

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Diffusion absorption refrigeration (DAR) is a small-scale cooling technology that can be driven purely by thermal energy without the need for electrical or mechanical inputs. In this work, a detailed experimental evaluation was undertaken of a newly-proposed DAR unit with a nominal cooling capacity of 100 W, aimed at solar-driven cooling applications in warm climates. Electrical cartridge heaters were used to provide the thermal input which was varied in the range 150-700 W, resulting in heat source temperatures of 175-215 • C measured at the generator. The cooling output during steady-state operation was determined from the power consumed by an electric heater used to maintain constant air temperature in an insulated box constructed around the evaporator. Tests were performed with the DAR system configured with the default manufacturer's settings (22 bar charge pressure and 30 % ammonia concentration). The measured cooling output (to air) across the range of generator heat inputs was 24-108 W, while the coefficient of performance (COP) range was 0.11-0.26. The maximum COP was obtained at a generator heat input of 300 W. Results were compared to performance predictions from a steady-state thermodynamic model of the DAR cycle, showing a reasonable level of agreement at the nominal design point of system, but noteworthy deviations at part-load/off-design conditions. Temperature measurements from the experimental apparatus were used to evaluate assumptions used in the estimation of the model state point parameters and examine their influence on the predicted system performance.

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Experimental analysis of diffusion absorption refrigerator driven by electrical heater and engine exhaust gas

Cited by 17 publications

References 16 publications

Diffusion Absorption Refrigeration Systems: An Overview of Thermal Mechanisms and Models

Diffusion Absorption Refrigeration Systems: An Overview of Thermal Mechanisms and Models

Innovative Multigeneration System with Heat Exchangers for Harnessing Thermal Energy from Cement Kiln Exhaust Gases

Experimental investigation of an ammonia-water-hydrogen diffusion absorption refrigerator

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