Solar powered adsorption refrigerator with CPC collection system: Collector design and experimental test

González, Manuel Fernández; Rodríguez, Luis Rouco

doi:10.1016/j.enconman.2007.03.016

Cited by 54 publications

(26 citation statements)

References 17 publications

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“…In the current study, a two-dimensional (2D) CPC with a partially exposed tubular absorber was used. Partially exposed receivers have been reported to be favorable for solar adsorption cooling applications as they have the advantage of heat rejection from the back side during the adsorption process and increased adsorbent per unit area [13]. Normally, a CPC does not require tracking and it can accept incoming radiation over a relatively wide range of angles by using multiple reflections [18].…”

Section: Cpcmentioning

confidence: 99%

“…Flat-plate collectors are commonly used in solar adsorption refrigeration systems [7][8][9][10]. Some attention has also been given to using concentrator collectors [11,12], specifically CPCs [13,14]. CPCs can achieve higher temperatures compared to flat-plate collectors, and it has also been reported that CPCs have the ability to produce ice with a solar adsorption ice maker even on overcast days [14].…”

Section: Introductionmentioning

confidence: 99%

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Performance Evaluation of a Solar Adsorption Refrigeration System with a Wing Type Compound Parabolic Concentrator

2014

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Simulation study of a solar adsorption refrigeration system using a wing type compound parabolic concentrator (CPC) is presented. The system consists of the wing type collector set at optimum angles, adsorption bed, a condenser and a refrigerator. The wing type collector captures the solar energy efficiently in the morning and afternoon and provides the effective temperature for a longer period of time compared to that achieved by a linear collector. The objectives of the study were to evaluate the system behavior, the effect of wing length, and to compare the performance of the systems with wing type and linear CPCs. A detailed dynamic simulation model was developed based on mass and energy balance equations. The simulation results show that the system performance with wing type CPC increases by up to 6% in the summer and up to 2% in the winter, compared to the performance with a linear CPC having same collector length. The ice production also increases up to 13% in the summer with the wing type CPC. This shows that the wing type CPC is helpful to increase the performance of the system compared to the linear CPC with the same collector length and without the need for tracking.

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Section: Cpcmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of a Solar Adsorption Refrigeration System with a Wing Type Compound Parabolic Concentrator

2014

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“…CPC can achieve higher temperature and perform well in overcast situation compare to commonly used flat plate collectors [16]. Partially exposed receiver was reported to be favourable for solar adsorption cooling application as it give the advantage of heat rejection from back side during desorption and increases the amount of adsorbent per unit area [9]. Normally, CPC does not require tracking and it can accept incoming radiation over a relatively wide range of angles by using multiple reflections.…”

Section: System Descriptionmentioning

confidence: 99%

“…A number of researches has been conducted to improve the performance of conventional one bed solar adsorption refrigeration system by increasing the heat and mass transfer capability of adsorbent bed using fins [3,4], adding metal pieces into adsorbent bed [5], using high conductive adsorbent [6] and consolidated bed [7]. In most of the studies, flat plate collectors were used [3,4] and some attempts were also carried out by using concentrator collectors [8] especially compound parabolic concentrator (CPC) [9].…”

Section: Introductionmentioning

confidence: 99%

Simulation Study of Continuous Solar Adsorption Refrigeration System Driven by Compound Parabolic Concentrator

Umair¹,

Akisawa²,

Ueda³

2014

TOREJ

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Solar adsorption refrigeration is promising technology especially in the developing countries and remote areas because the system can be driven by solar energy without involving electricity. Therefore, it is technologically possible and socially feasible in the areas where electricity is not enough but solar energy is rather easy to obtain. The conventional system works intermittently and produces cooling only during night. In this article, a solar adsorption refrigerator is presented that produces cooling continuously using only solar energy. The system consists of two beds with CPC collectors, a condenser and evaporator. The one cycle complete in two days. A simulation model was developed to evaluate the system performance. The objectives of this study were to investigate the dynamic behaviour of the system, and to compare the system behaviour with the conventional system. The results show that system produces continuous cooling. Cooling rate decreased in the middle of the day because of relatively high ambient temperature. The performance of the system increased with high value of heat transfer coefficient between receiver and bed, and decreased by increasing the adsorbent mass. The performance of the continuous system was compared with that of intermittent system. It was found that the evaporator temperature in the intermittent system increased during the day because cooling is not produced during day in that system, while proposed system kept the evaporator at low temperature continuously. This study will facilitate the future researches in solar adsorption continuous refrigeration technology because achieving continuous cooling only with solar energy is very attractive.

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“…The basic SAR system is a single adsorption bed integrated within a solar collector. The flat plate [25][26][27][28][29] as well as the compound parabolic concentrator [30][31][32] solar collectors have been used.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of a Continuous Operation Adsorption Chiller Powered by Solar Energy Using Silica Gel and Water as the Working Pair

Hassan¹

2014

Energies

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Abstract:In the present study, dynamic analysis and performance evaluation of a solar-powered continuous operation adsorption chiller are introduced. The adsorption chiller uses silica gel and water as the working pair. The developed mathematical model represents the heat and mass transfer within the reactor coupled with the energy balance of the collector plate and the glass cover. Moreover, a non-equilibrium adsorption kinetic model is taken into account by using the linear driving force equation. The variation of solar radiation, wind speed, and atmospheric temperature along a complete cycle are considered for a more realistic simulation. Based on the case studied and the baseline parameters, the chiller is found to acquire a coefficient of performance of 0.402. The average thermal efficiency of the solar collector is estimated to be 62.96% and the average total efficiency approaches a value of 50.91%. Other performance parameters obtained are 363.8 W and 1.82 W/kg for the cooling capacity and the specific cooling power of the chiller, respectively. Furthermore, every 1 kg of silica gel inside the adsorption reactor produces a daily chilled water mass of 3 kg at a temperature of 10• C. In addition, the cooling system harnesses 25.35% of the total available solar radiation and converts it to a cooling effect.

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Solar powered adsorption refrigerator with CPC collection system: Collector design and experimental test

Cited by 54 publications

References 17 publications

Performance Evaluation of a Solar Adsorption Refrigeration System with a Wing Type Compound Parabolic Concentrator

Performance Evaluation of a Solar Adsorption Refrigeration System with a Wing Type Compound Parabolic Concentrator

Simulation Study of Continuous Solar Adsorption Refrigeration System Driven by Compound Parabolic Concentrator

Performance Evaluation of a Continuous Operation Adsorption Chiller Powered by Solar Energy Using Silica Gel and Water as the Working Pair

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