Development of a Aolar Intermittent Refrigeration System for Ice Production

Moreno-Quintanar, G.; Rivera, W.; Best, R.

doi:10.3384/ecp110574033

Cited by 7 publications

(7 citation statements)

References 9 publications

(11 reference statements)

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“…In 1995, a better overall COP (0.45-0.82) was attained. Moreno-Quintanar et al [33] analysed the use of a ternary mixture consisting of a binary absorbent solution (LiNO 3 -H 2 O) and a refrigerant (NH 3 ) in comparison with the binary working pair NH 3 /LiNO 3 for producing 8 kg of ice. Compound parabolic concentrators (CPC) were used in the experimental investigation.…”

Section: Absorption Systemsmentioning

confidence: 99%

General review of solar-powered closed sorption refrigeration systems

Sârbu

Sebarchievici

2015

Energy Conversion and Management

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Section: Absorption Systemsmentioning

confidence: 99%

General review of solar-powered closed sorption refrigeration systems

Sârbu

Sebarchievici

2015

Energy Conversion and Management

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“…From the studies presented, it is evident that the use solar energy as driving input to activate the absorption refrigeration systems has been one of the main goals of investigations on absorption refrigeration systems, as confirmed by Sheikhani et al [33] and Sharma et al [32]. The motivation is that it allows reducing electrical consumption to activate cooling and air conditioning systems, using renewable energy as an input, and a decrease in the use of fossil resources [109,115]. However, this kind of resource is directly associated with specific regions and climatic conditions since solar energy can only be used directly during the day and depends on solar irradiation.…”

Section: Chiller Activation By Absorption Through Solar Energymentioning

confidence: 99%

“…Details of design, construction, and testing of absorption refrigeration prototypes capable of meeting, partially or entirely, these limitations found in commercial type absorption chillers, such as those proposed by manufacturers were also presented [127,128]. Thus, the prototypes' construction elaborated by different groups around the world, such as the ARS prototypes presented in this review survey [24][25][26][27]115,116,136,138,139], indicates a way to make it possible to apply solar energy as a driven source for them.…”

Section: Final Considerations On the Absorption Refrigeration Systems...mentioning

confidence: 99%

Absorption Refrigeration Systems Based on Ammonia as Refrigerant Using Different Absorbents: Review and Applications

et al. 2020

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The interest in employing absorption refrigeration systems is usually related to electricity’s precariousness since these systems generally use thermal rejects for their activation. The application of these systems is closely linked to the concept of energy polygeneration, in which the energy demand to operate them is reduced, which represents their main advantage over the conventional vapor compression system. Currently, the solution pairs used in commercial absorption chillers are lithium bromide/water and ammonia/water. The latter pair has been used in air conditioning and industrial processes due to the ammonia operation’s low temperature. Few review papers on absorption chillers have been published, discussing the use of solar energy as the input source of the systems, the evolution of the absorption refrigeration cycles over the last decades, and promising alternatives to increase the performance of absorption refrigeration systems. There is a lack of consistent studies about designing requirements for absorption chillers, so an updated review covering recent advances and suggested solutions to improve the use and operation of those absorption refrigeration systems using different working fluids is relevant. Hence, this presents a review of the state-of-the-art of ammonia/absorbent based absorption refrigeration systems, considering the most relevant studies, describing the development of this equipment over the years. The most relevant studies in the open literature were collected to describe this equipment’s development over the years, including thermodynamic properties, commercial manufacturers, experimental and numerical studies, and the prototypes designed and tested in this area. The manuscript focuses on reviewing studies in absorption refrigeration systems that use ammonia and absorbents, such as water, lithium nitrate, and lithium nitrate plus water. As a horizon to the future, the uses of absorption systems should be rising due to the increasing values of the electricity, and the environmental impact of the synthetic refrigerant fluids used in mechanical refrigeration equipment. In this context, the idea for a new configuration absorption chiller is to be more efficient, pollutant free to the environment, activated by a heat substantiable source, such as solar, with low cost and compactness structure to attend the thermal needs (comfort thermal) for residences, private and public buildings, and even the industrial and health building sector (thermal processes). To conclude, future recommendations are presented to deal with the improvement of the refrigeration absorption chiller by using solar energy, alternative fluids, multiple-effects, and advanced and hybrid configurations to reach the best absorption chiller to attend to the thermal needs of the residential and industrial sector around the world.

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“…The absorption refrigeration system cycle can be analyzed in terms of its efficiency through the coefficient of performance (COP), a dimensionless quantity used to assess the relation between the refrigeration capacity obtained and the solar thermal power supplied to the generator, being set by the following expression [8,23] Considering a value for the COP of the absorption thermal system and knowing the freezing power value, the solar power needed for the absorption refrigeration cycle can be obtained through the following expression:…”

Section: Solar Thermal Power Calculationmentioning

confidence: 99%

Theoretical Study of an Intermittent Water-Ammonia Absorption Solar System for Small Power Ice Production

Garcia

Rosa

2019

Sustainability

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This article is dedicated to the design, calculation and dimensioning of a small powered refrigeration system (132W) which produces ice bars (freezing) using solar thermal power, and resorts to an intermittent cycle absorption circuit with a water-ammonia mixture (H2O-NH3). The aim of this equipment is to minimize problems faced in places where there is no electric network to supply traditional refrigeration systems which preserve perishable products produced or stocked there, as well as drugs (vaccines), namely for specific regions of developing countries. The system developed can be divided into two parts. The intermittent cycle absorption refrigeration system uses a binary water-ammonia solution (H2O-NH3), where water is the absorber and the ammonia is the coolant and the thermal solar system. This is made up of CPC flat plate thermal collectors or vacuum tubes in which solar energy heats the water that circulates in the primary circuit. In the absorption circulation system, circulation occurs in a natural way due to the fluids affinity, and the temperature and pressure internal variations. This article shows the assumptions underlying the conception, calculation and dimensioning of the system’s construction.

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Development of a Aolar Intermittent Refrigeration System for Ice Production

Cited by 7 publications

References 9 publications

General review of solar-powered closed sorption refrigeration systems

General review of solar-powered closed sorption refrigeration systems

Absorption Refrigeration Systems Based on Ammonia as Refrigerant Using Different Absorbents: Review and Applications

Theoretical Study of an Intermittent Water-Ammonia Absorption Solar System for Small Power Ice Production

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