Performance of a Solar Absorption Cooling System Using Nanofluids and a Membrane-Based Microchannel Desorber

Venegas, M.; García-Hernando, N.; Zacarías, Alejandro; Vega, M. de

doi:10.3390/app10082761

Cited by 6 publications

(3 citation statements)

References 40 publications

(51 reference statements)

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“…According to the authors, the membrane desorber driven by thermal solar energy can provide 16.8 kg/day of refrigerant fluid for the absorption chiller operation. Venegas et al [ 66 ] proposed a solar-based absorption cooling system, which included a membrane desorber and the LiBr-water-nanofluids mixture. Three nanoparticles (CuO, Al 2 O 3 , and carbon nanotubes) were analyzed.…”

Section: Membrane-based Desorbersmentioning

confidence: 99%

Role of Membrane Technology in Absorption Heat Pumps: A Comprehensive Review

et al. 2020

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The role of heat pumps is linked to the actions of human life. Even though the existing technologies perform well in general, they have still some problems, such as cost, installation area, components size, number of components, noise, etc. To address these issues, membrane technologies have been introduced in both heat and cooling devices. The present work proposes and studied the review of the role of membrane technology in the heat pumps. The study focuses on the advancement and replacement of membrane in the place of absorption and compression heat pump components. The detailed analysis and improvements are focused on the absorber, desorber, and heat and mass exchanger. The parameters conditions and operation of membrane technologies are given in detail. In addition to this, the innovation in the heat pumps using the membrane technology is given in detail.

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Section: Membrane-based Desorbersmentioning

confidence: 99%

Role of Membrane Technology in Absorption Heat Pumps: A Comprehensive Review

et al. 2020

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“…Its use in the field of renewable and sustainable energy technologies allows for creating high-efficient and more economic systems. In this regard, many research studies [1][2][3][4][5][6][7][8] have evaluated, theoretically and experimentally, the increase in performance in heat transfer applications and solar thermal systems associated with the use of alumina-water as working fluid.…”

Section: Introductionmentioning

confidence: 99%

Aqueous Theta-Phase Aluminum Oxide Nanofluid for Energy Applications: Experimental Study on Thermal Conductivity

Zacarías,

de Vega,

García-Hernando

et al. 2024

Applied Sciences

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The use of nanofluids in energy systems allows for increasing efficiency and developing more economic systems. Alumina-water is one of the most common nanofluids used but little information is available about the aqueous theta-phase aluminum oxide. Given the lack of thermal conductivity data for this nanofluid, in this research, this property is experimentally evaluated. Nanofluid is prepared using the two-step method, employing a magnetic stirrer and a sonication bath. A high-precision sensor is employed for measuring thermal conductivity, using the method of transient hot wire. The thermal conductivity measurements for the base fluid (water) are compared with data provided by NIST. Nanoparticle mass fraction in the nanofluid is increased from 1 to 10% and the temperature from 22.1 to 59.3 °C. Three sonication times (1.5, 4 and 16.5 h) are used. A strong dependence between the thermal conductivity and the temperature and nanoparticles concentration has been found, while the sonication time has a negligible influence on the thermal conductivity in the range of times tested. A correlation to obtain the thermal conductivity of the water-based nanofluid using theta-phase aluminum oxide has been developed, including nanoparticle volume concentration and temperature. An excellent agreement is obtained between predicted and experimental data.

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“…According to [1], it is predicted that by 2100, solar technologies will supply approximately 70% of the world's energy consumption. Conventional low-and mediumtemperature collectors are used to collect heat, for space heating or hot water supply [2,3]. The absorber of the solar collector has a solid surface of thermally stable polymers, aluminum, steel or copper, to which a matte black or wavelength selective coating is applied.…”

Section: Introductionmentioning

confidence: 99%

Performance Assessment of Low-Temperature Solar Collector with Fullerenes C60 Manufactured at Low Cost in an Emerging Country

et al. 2022

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In this work, the performance of a low-temperature solar collector (LTSC) is evaluated, using carbon nanoparticles in water as working fluid. The nanoparticles used are crystallized fullerenes, with a red parameter of 1.42 nm ± 0.5 nm, with different volume fractions in water. The thickness of the carbon film was approximately 140 to 520 nm. The study is divided into three parts: modeling and simulation of an LTSC, low-cost production and characterization of nanoparticles, and thermal evaluation of the LTSC. For the study, fullerenes were produced by microwave synthesis from a terpenoid resin (Camphor) and the nanoparticles were characterized by scanning electron microscopy (SEM) and High-Resolution Transmission (HRTEM). Tests were carried out with different volumetric flow rates, 0.0111 LT/s, 0.0166 LT/s and 0.0194 L/s, and two volumetric concentrations, 0.035% and 0.063%. The results obtained from the fullerene nanofluid showed an improvement in the thermophysical properties compared to the properties of water. The performance results showed that the efficiency increases up to 47.2% compared to that of water, with a volume fraction of 0.063%, and a flow rate of 0.0194 LT/s.

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Performance of a Solar Absorption Cooling System Using Nanofluids and a Membrane-Based Microchannel Desorber

Cited by 6 publications

References 40 publications

Role of Membrane Technology in Absorption Heat Pumps: A Comprehensive Review

Role of Membrane Technology in Absorption Heat Pumps: A Comprehensive Review

Aqueous Theta-Phase Aluminum Oxide Nanofluid for Energy Applications: Experimental Study on Thermal Conductivity

Performance Assessment of Low-Temperature Solar Collector with Fullerenes C60 Manufactured at Low Cost in an Emerging Country

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