The Effect of Input Temperatures on the Absorber Parameters

Atmaca, İbrahim; Yiğit, Abdulvahap; Kılıç, Muhsin

doi:10.1016/s0735-1933(02)00446-3

Cited by 9 publications

(3 citation statements)

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“…1,2,21 Transient behavior of the AC by making a step change in the cycle is carried out by literatures. 3,8,10,11,18 The effect of cold, chilled, and hot water circulation in the cycle on the absorber surface area has been investigated by Atmaca et al 22 . Heat and mass transfer coefficients are determined by calculating the temperature and concentration variations at the falling film in the absorber.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the launch time of NH₃-H₂O absorption chiller under different working condition

Tiji

Ramiar

Ebrahimnataj

2019

Proceedings of the Institution of Mechanical Engineers, Part E:

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This study deals with the launch time of main characteristic of NH3-H 2O absorption chiller under different working condition. The aim of this work was about to scrutinize a lumped-parameter dynamic simulation of aqua-ammonia absorption chiller in addition to investigating the effect of subcooled liquid at condenser/absorber outlet on absorption chiller’s key parameters launch time. Also, the effect of ambient temperature on absorption chiller’s key parameters’ launch time is studied. In order to determine the thermodynamic properties of the working fluid, the Engineering Equation Solver software is applied. By making a link between Engineering Equation Solver and MATLAB software, the differential equations are solved in the MATLAB software environment by fourth-order Rung–Kutta method. According to the result, increase of the sub-cool liquid temperature at condenser outlet has no effect on absorption chiller’s key parameters’ launch time. Besides, 10 ℃-increase in subcooled liquid temperature at the absorber outlet leads to decreasing the launch time of the coefficient of performance to 19.35%. The result shows that if cooling tower temperature goes from 22 ℃ to 30 ℃, launch time of the coefficient of performance rises by 10.43%, while evaporator heat transfer rate falls by 30%. To validate the dynamic model, the results deduced from numerical simulation are compared with peer steady–state results.

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Section: Introductionmentioning

confidence: 99%

“…Hence, the dynamical analysis of AC is very important. In addition, reviewing the AC's literature reveals that researchers [22][23][24][25] have investigated steadystate condition while its dynamic models have not been studied yet.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the launch time of NH₃-H₂O absorption chiller under different working condition

Tiji

Ramiar

Ebrahimnataj

2019

Proceedings of the Institution of Mechanical Engineers, Part E:

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“…A single stage ammonia–water absorption chiller with complete condensation has been recently studied . The simulation of absorption and refrigeration systems is very helpful for understanding and evaluating the system, as well as for system design, operation and control, and device design or selection in detail. − …”

Section: Introductionmentioning

confidence: 99%

Dynamic Simulation of an Ammonia–water Absorption Refrigeration System

Cai

Sen

Paolucci

2011

Ind. Eng. Chem. Res.

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A dynamic model of a single-effect absorption refrigeration cycle with realistic thermodynamics has been developed. The thermodynamic properties are obtained from the Redlich–Kwong equation of state for ammonia/water as the refrigerant/absorbent mixture. The governing ordinary differential equations are derived from the mass, momentum and energy balances for the different components of the system. Lumped parameters are assumed, so that at any instant of time the generator, condenser, evaporator and absorber are each characterized by a single temperature, pressure and concentration. Friction factors are used to calculate pressure drops in the pipes. The transient response of the cycle to a step change in pressure rise across the pump is determined from numerical solutions of the governing equations. The dynamic responses of the mass flow rates, heat rates and the coefficient of performance are shown. The rise time seems to be about two loop circulation times.

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A Design Approach for Cooling Gas Turbine Intake Air with Solar-Assisted Absorption Cooling Cycle

Ünver

Ozkara

Bahar

2018

The Role of Exergy in Energy and the Environment

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The Effect of Input Temperatures on the Absorber Parameters

Cited by 9 publications

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Investigation of the launch time of NH₃-H₂O absorption chiller under different working condition

Investigation of the launch time of NH₃-H₂O absorption chiller under different working condition

Dynamic Simulation of an Ammonia–water Absorption Refrigeration System

A Design Approach for Cooling Gas Turbine Intake Air with Solar-Assisted Absorption Cooling Cycle

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The Effect of Input Temperatures on the Absorber Parameters

Cited by 9 publications

References 0 publications

Investigation of the launch time of NH3-H2O absorption chiller under different working condition

Investigation of the launch time of NH3-H2O absorption chiller under different working condition

Dynamic Simulation of an Ammonia–water Absorption Refrigeration System

A Design Approach for Cooling Gas Turbine Intake Air with Solar-Assisted Absorption Cooling Cycle

Contact Info

Product

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About

Investigation of the launch time of NH₃-H₂O absorption chiller under different working condition

Investigation of the launch time of NH₃-H₂O absorption chiller under different working condition