Experimental investigation of silica gel and zeolite coated fin-tube heat exchangers under arid climatic conditions

Shemelin, Viacheslav; Pokorny, Nikola; Novotny, Jiri

doi:10.1016/j.egyr.2022.06.115

Cited by 5 publications

(4 citation statements)

References 26 publications

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“…Silica gels and composites containing silica gel are cost effective desiccants commonly employed for commercial applications. [31][32][33][34] Consequently, the water desorption and adsorption properties of these materials have been the focus of signicant scrutiny. 35,36 Variable temperature infrared spectroscopy was employed to monitor silica gel sample changes while heating and cooling at 2 °C min −1 .…”

Section: Silica Gel Dehydration/re-hydration During Linear Temperatur...mentioning

confidence: 99%

Precise temperature control and rapid heating/cooling of infrared spectroscopy samples with a two-stage thermoelectric device

White

2023

Anal. Methods

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Section: Silica Gel Dehydration/re-hydration During Linear Temperatur...mentioning

confidence: 99%

Precise temperature control and rapid heating/cooling of infrared spectroscopy samples with a two-stage thermoelectric device

White

2023

Anal. Methods

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“…A promising approach consists of a mix between the desiccants oriented approach and the reverse cycle application, as the example described in ref. [33], where a thin layer of desiccant coats condenser coils. The condensation heat is used to extract humidity from the desiccant, while the absorption is performed on environmental air.…”

Section: Awg Technologiesmentioning

confidence: 99%

Air to Water Generator Integrated System Real Application: A Study Case in a Worker Village in United Arab Emirates

Cattani¹,

Cattani

Magrini

2023

Applied Sciences

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The water crisis is currently affecting billions of people. To mitigate the issue, unconventional water sources should be taken into account. Among them, atmosphere is a promising possibility, but it is still considered a novel source, and more studies, based on real results concerning the behaviour of the Atmospheric/Air-to Water Generator (AWG) systems, also known as Atmospheric Water Harvesting (AWH) systems, are needed to prove the water extraction sustainability. The current research work describes the real application of an integrated AWG system, based on a thermodynamic reverse cycle, designed to extract water from air and take advantage of the other useful effects of the cycle at the same time. The integrated machine was placed in Dubai, in a worker village, and tested. The machine is able to provide, at the same time, with the same energy consumption, water, heating and cooling energy. On the basis of onsite measurements, calculations about the efficiencies, using the Water Energy Transformation (WET), plastic savings, due to bottled water avoidance, and economic sustainability were carried out. The work answers to research questions concerning the potentiality of integrated systems in Heating Ventilation Air Conditioning (HVAC) plants revamping, the economic sustainability of water extraction from air and the lack of tests on real AWG machines of thousand-litre production capability (large size).

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“…It can be called a "hybrid solution" because it couples the desiccant technique and the reverse cycle. For example, in [23], desiccants coat the condenser coils, and the heat released by the refrigerant is used to regenerate them. In [24] desiccants were gathered into a rotating wheel placed at the air inlet section of the reverse cycle after its passage on the condenser.…”

Section: Water Extraction From Air and The Research Gap Related To Cl...mentioning

confidence: 99%

Energy Performance of Water Generators from Gaseous Mixtures by Condensation: Climatic Datasets Choice

Cattani¹,

Magrini

Leoni

2022

Energies

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Due to the growing issues related to water scarcity and pollution, water extraction from gaseous mixtures, such as atmospheric air, or fumes from combustion, is acquiring increasing importance. Nevertheless, one of the main concerns is the energy consumption that affects the use of any kind of Air(/Gas) to Water Generator (AWG). Referring specifically to water extraction from humid environmental air, AWG behaviour depends upon the air thermo-dynamic conditions and thus upon weather data. To evaluate the water extraction energy efficiency, two interesting tools can be applied: the WET (Water Energy Transformation) indicator, concerning the specific AWG machine behaviour, and the MHI (Moisture Harvesting Index), focused on climate suitability evaluation. Those tools require the knowledge of weather data to be applied. When hourly data for the entire year are available, the application of these tools leads to reliable results. However, in many cases, only average climatic data are available. Today, there are no indications about the reliability of results coming from the use of those less accurate data sets: the research aims to provide a preliminary assessment of the conditions under which average climatic data can be employed without losing meaning. This target was pursued by calculating WET and MHI with three different data sets and five meaningful climate examples. By comparing results, it was possible to provide indications about the most suitable use of average data.

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Experimental investigation of silica gel and zeolite coated fin-tube heat exchangers under arid climatic conditions

Cited by 5 publications

References 26 publications

Precise temperature control and rapid heating/cooling of infrared spectroscopy samples with a two-stage thermoelectric device

Precise temperature control and rapid heating/cooling of infrared spectroscopy samples with a two-stage thermoelectric device

Air to Water Generator Integrated System Real Application: A Study Case in a Worker Village in United Arab Emirates

Energy Performance of Water Generators from Gaseous Mixtures by Condensation: Climatic Datasets Choice

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