Design and Analysis of a Two-Stage Adsorption Air Chiller

Benrajesh, P.; Rajan, A. John

doi:10.1088/1757-899x/197/1/012030

Cited by 5 publications

(2 citation statements)

References 18 publications

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“…As a source of cold it is proposed to use absorption refrigeration machine. [13][14][15][16][17] The operational principle of an absorption refrigeration machine is based on certain properties of the refrigerant and absorbent, which provide heat removal, cooling and maintaining the required temperature conditions. At present, the industry widely uses absorption refrigeration machines to produce cold in an area of positive temperatures for various technological needs.…”

Section: Methodsmentioning

confidence: 99%

Study of the work and efficiency improvement of combined-cycle gas turbine plants

et al. 2019

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The purpose of the paper is to study and analyze the possibility of increasing the power output of a combined-cycle gas turbine (CCGT) unit during the period of positive ambient temperatures. The first task is to analyze the operation of a 110 MW combined-cycle power unit at various ambient temperatures and to obtain alterations in the main CCGT characteristics when the ambient temperature changes. The other task is to study the usage of an absorption refrigeration machine in a CCGT cycle to increase its energy efficiency. Calculations of the thermal scheme of a gas turbine were carried out using mathematical modeling, the steam turbine was calculated based on guidelines. The conducted studies allow to conclude that the use of an absorption refrigeration machine in the cycle of a combined-cycle plant can improve the efficiency of the unit, increasing profits from power generation, and reducing penalties for non-compliance with the load schedule.

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Section: Methodsmentioning

confidence: 99%

Study of the work and efficiency improvement of combined-cycle gas turbine plants

et al. 2019

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“…The mass and heat transfer were also interpreted using this model. They quantitatively studied the regeneration temperature on the cooling performance [4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Simulation of a Two-Stage Air Cooled Adsorption Chiller with Heat Recovery Part I: Physical and Mathematical Performance Model

et al. 2022

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In the proposed work, the MATLAB program was used to model and simulate the performance of the investigated two-stage adsorption chiller with and without heat recovery using an activated carbon/methanol pair. The simulated model results were then validated by the experimental results conducted by Millennium Industries. The model was based on 10th order differential equations; six of them were used to predict bed, evaporator and condenser temperatures while the other four equations were used to calculate the adsorption isotherm and adsorption kinetics. The detailed validation is stated in the next paragraphs; for example, it clearly notes that the simulation model results for the two-stage air cooled chiller are well compared with the experimental data in terms of cooling capacity (6.7 kW for the model compared with 6.14 kW from the experimental results at the same conditions). The Coefficient of Performance (COP) predicted by this simulation was 0.4, which is very close to that given by the Carnot cycle working at the same operating conditions. The model optimized the switching time, adsorption/desorption time and heat recovery time to maximize both cooling capacity and COP. The model optimized the adsorption/desorption cycle time (300 to 400 s), switching cycle time (50 s) and heat recovery cycle time (30 s). The temporal history of bed, evaporator and condenser temperatures is provided by this model for both heat recovery and without heat recovery chiller operation modes. The importance of this study is that it will be used as a basis for future series production.

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