Dynamic investigation of the diffusion absorption refrigeration system NH 3 -H 2 O-H 2

Adjibade, Mohamed Izzedine Serge; Thiam, Ababacar; Awanto, Christophe; Ndiogou, Baye Alioune; Sabourin, Vincent

doi:10.1016/j.csite.2017.10.006

Cited by 13 publications

(2 citation statements)

References 14 publications

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“…Dynamic simulations were conducted to assess the adequacy of model assumptions. Moreover, the dynamic simulations of diffusion‐absorption refrigerator was investigated by Ben et al, Adjibade et al, Mansouri et al The working fluids of DAR are NH 3 ‐H 2 O‐H 2 .…”

Section: Introductionmentioning

confidence: 99%

Dynamic simulation and experimental verification on absorption refrigeration driven by vehicle waste heat

Liu

Han

et al. 2020

Int J Energy Res

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Waste heat exhausted from vehicle engine has significant influences on the performances of absorption refrigeration driven by vehicle exhaust heat (VARS), especially for the transient response of VARS to the exhaust temperature and flow rate. Moreover, ambient temperature and flow rate of solution pump also affect its performances. Based on these, a dynamic mathematical model of VARS was proposed and established to observe its dynamic performances in this work. Further, the dynamic model was solved, and the simulation results were compared to the experimental data of a prototype in the same operating conditions. Finally, the transient response of VARS to exhaust temperature and flow rate, ambient temperature, and flow rate of solution pump were analyzed. The simulation results showed that the response time is about 2000 seconds when a disturbance was imposed. The research findings can supply some guidance for a reliable design, optimization, and control strategy for the actual application of the VARS. K E Y W O R D Sbubble absorber, dynamic simulation, spiral coil generator, vehicle driven absorption refrigeration

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Section: Introductionmentioning

confidence: 99%

Dynamic simulation and experimental verification on absorption refrigeration driven by vehicle waste heat

Liu

Han

et al. 2020

Int J Energy Res

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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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Investigating the fuel type influence on the thermo-economic performance of absorption refrigeration systems: a comparative study

Jalili

Chitsaz

Nazari

2021

J Therm Anal Calorim

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Dynamic investigation of the diffusion absorption refrigeration system NH 3 -H 2 O-H 2

Cited by 13 publications

References 14 publications

Dynamic simulation and experimental verification on absorption refrigeration driven by vehicle waste heat

Dynamic simulation and experimental verification on absorption refrigeration driven by vehicle waste heat

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

Investigating the fuel type influence on the thermo-economic performance of absorption refrigeration systems: a comparative study

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