Assessing performance and controlling operating conditions of a solar driven absorption chiller using simplified numerical models

Marc, Olivier; Anies, Guillaume; Lucas, Franck; Castaing-Lasvignottes, Jean

doi:10.1016/j.solener.2012.04.013

Cited by 25 publications

(8 citation statements)

References 31 publications

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“…The mathematical model of the cycle is based on mass and energy balances written for each machine element. For a steady state process and neglecting kinetic and potential Journal of Engineering 5 energy variations, balance equations for global mass (equation (6)), salt mass (equation 7), and energy (equation 8) write, respectively, ∑̇= ∑̇ (6) ∑̇= ∑̇ 7∑̇− ∑̇= ∑̇ℎ − ∑̇ℎ (8) anḋare heat and transfer rates between machine element and its surroundings. The cycle of the absorption system is expressed as…”

Section: Combined Ejector Single-effect Absorption Cycle Modelmentioning

confidence: 99%

“…In the domain of refrigeration and air-conditioning, absorption techniques for production of cold are considered particularly suitable for solar applications. Single-effect absorption systems can be activated by flat plate collectors and/or evacuated tube collectors [8,9] since they require relatively low temperatures of the driving heat sources. They have however low performances.…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic Analysis of a Solar Combined Ejector Absorption Cooling System

Sioud

Garma

Bellagi

2018

Journal of Engineering

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The objective of this paper is to investigate theoretically a solar driven 60 kW absorption cooling system. The system is constituted of a combined ejector single-effect absorption cycle coupled with a linear Fresnel solar concentrator and using water/lithium bromide as working fluid. The combined ejector single-effect absorption cycle exhibits high performances, almost equal to that of double-effect absorption device. However, higher driving heat temperatures are required than in the case of conventional single-effect machines. A mathematical model is set up to analyze the optical performance of the linear Fresnel concentrator. Simulations are carried out to study the overall system performance COPsystem and the performances of the combined absorption machine COPcycle for generator driving temperatures and pressures in the ranges 180°C – 210°C and 198 kPa – 270 kPa, respectively. Further, the effect of operating parameters such as the cooling medium and chilled water temperatures is investigated. A maximum cycle performance of 1.03 is found for a generator pressure of 272 kPa and chilled and cooling water temperatures of 7°C and 25°C, respectively. A case study is investigated for a typical summer Tunisian day, from 8:00 to 18:00. The effect of ambient temperature and solar radiation on cycle and system performances is simulated. The optical performances of the concentrator are also analyzed. Simulation results show that between 11:00 and 14:00 the collector efficiency is 0.61 and that the COPcycle reaches values always higher than 0.9 and the COPsystem is larger than 0.55. Globally the performances of the investigated cycle are similar to those of double-effect conventional absorption system.

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Section: Combined Ejector Single-effect Absorption Cycle Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermodynamic Analysis of a Solar Combined Ejector Absorption Cooling System

Sioud

Garma

Bellagi

2018

Journal of Engineering

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“…Hence, Rosiek and Batlles [39] investigate performance analysis and conclude that simulation values was in match to the experimental value by 0.7% RMSE error caused by the artificial neural network. Control strategy performed by Marc et al [52] was static modelling to estimate chiller behaviour and define their operating range. This method use laboratory experimental results in actual operating strategy.…”

Section: Solar Absorption and Vapour Compression System Based Hybrid mentioning

confidence: 99%

A review on the recent development of solar absorption and vapour compression based hybrid air conditioning with low temperature storage

Noor

Azim

Azran

et al. 2016

MATEC Web of Conferences

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Abstract. Conventional air conditioners or vapour compression systems are main contributors to energy consumption in modern buildings. There are common environmental issues emanating from vapour compression system such as greenhouse gas emission and heat wastage. These problems can be reduced by adaptation of solar energy components to vapour compression system. However, intermittence input of daily solar radiation was the main issue of solar energy system. This paper presents the recent studies on hybrid air conditioning system. In addition, the basic vapour compression system and components involved in the solar air conditioning system are discussed. Introduction of low temperature storage can be an interactive solution and improved economically which portray different modes of operating strategies. Yet, very few studies have examined on optimal operating strategies of the hybrid system. Finally, the findings of this review will help suggest optimization of solar absorption and vapour compression based hybrid air conditioning system for future work while considering both economic and environmental factors.

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“…Izquierdo et al, 2014;Evola et al, 2013;Marc et al, 2012;Martínez et al, 2012;Praene et al, 2011;Venegas et al, 2011;Agyenim et al, 2010;Vega et al, 2006;Asdrubali and Grignaffini, 2005).…”

Section: Literature Reviewunclassified