Simulation, performance analysis and optimization of desiccant wheels

Antonellis, Stefano De; Joppolo, Cesare Maria; Molinaroli, Luca

doi:10.1016/j.enbuild.2010.03.007

Cited by 123 publications

(70 citation statements)

References 15 publications

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“…• C, 11,50 which cannot be accessed directly using ambient conditions absent solar thermal collectors or electrical heaters. The enthalpy difference between the inlet and outlet states to the heater is used to calculated the adsorption heat Q ad in this model.…”

Section: Model Developmentmentioning

confidence: 99%

Next-generation HVAC: Prospects for and limitations of desiccant and membrane-based dehumidification and cooling

et al. 2017

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Recently, next-generation HVAC technologies have gained attention as potential alternatives to the conventional vapor-compression system (VCS) for dehumidification and cooling. Previous studies have primarily focused on analyzing a specific technology or its application to a particular climate. A comparison of these technologies is necessary to elucidate the reasons and conditions under which one technology might outperform the rest. In this study, we apply a uniform framework based on fundamental thermodynamic principles to assess and compare different HVAC technologies fromGeneration HVAC: Prospects for and Limitations of Desiccant and Membrane-Based Dehumidification and Cooling," Applied Energy, 200:330-346, 15 August 2017.an energy conversion standpoint. The thermodynamic least work of dehumidification and cooling is formally defined as a thermodynamic benchmark, while VCS performance is chosen as the industry benchmark against which other technologies, namely desiccant-based cooling system (DCS) and membrane-based cooling system (MCS), are compared. The effect of outdoor temperature and humidity on device performance is investigated, and key insights underlying the dehumidification and cooling process are elucidated. In spite of the great potential of DCS and MCS technologies, our results underscore the need for improved system-level design and integration if DCS or MCS are to compete with VCS. Our findings have significant implications for the design and operation of next-generation HVAC technologies and shed light on potential avenues to achieve higher efficiencies in dehumidification and cooling applications.

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Section: Model Developmentmentioning

confidence: 99%

Next-generation HVAC: Prospects for and limitations of desiccant and membrane-based dehumidification and cooling

et al. 2017

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“…For example, using different assessment criteria to a single aspect of the same problem can lead to diverse valid solutions, requiring introduction of new additional criteria [9].…”

Section: Introductionmentioning

confidence: 99%

Considerations on design optimization criteria for windows providing low energy consumption and high visual comfort

et al. 2012

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“…The first expression for a thermal wheel or desiccant wheel effectiveness was given as follows (Antonellis et al, 2010;Kangolu et al, 2004).…”

Section: Analytical Study Of Effectiveness For Regenerative Rotary Rementioning

confidence: 99%

Numerical Modeling of Regenerative Rotary Heat Exchanger: A Review

Baruah¹,

Kumar²

2017

Journal of Biosystems Engineering

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Background: Heat recovery is one of the prominent ways to save a considerable amount of conventional fossil fuel and minimize its adverse effects on the environment. The rotary heat exchanger is one of the most effective and efficient devices for heat recovery or heat exchanging purposes. It is a regenerative type of heat exchanger, which has been studied and used for many heat recovery purposes. However, regenerative thermal wheels have been mostly used as heat recovery systems in buildings. For modeling a rotary regenerator, it is very important to numerically consider all the factors involved, such as effectiveness, rotational speed, geometrical size and shape, and pressure drop (Δp). In recent times, several researchers have actively studied the rotary heat exchangers, both theoretically and experimentally. Reviews: In this paper different advances in the numerical modeling of regenerative rotary heat exchangers in relation to fluid flow and heat transfer have been discussed. Researchers have indicated that the effectiveness of the regenerative rotary heat exchanger depends on various factors including, among many others, rotational speed, rotational period and combustion power. It is reported that with the increase of periodic rotation the deviation of theoretical results from the experimental result increases. The available literature indicates that regenerative heat exchangers are having relatively more effectiveness (60-80%), compared to other heat exchangers. It is also observed that the finite difference method and finite volume methods are mostly used for discretizing the heat transfer governing equations, under some assumptions. Research also indicates that for the effectiveness calculation the ε-NTU method is the most popular and convenient.

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Simulation, performance analysis and optimization of desiccant wheels

Cited by 123 publications

References 15 publications

Next-generation HVAC: Prospects for and limitations of desiccant and membrane-based dehumidification and cooling

Next-generation HVAC: Prospects for and limitations of desiccant and membrane-based dehumidification and cooling

Considerations on design optimization criteria for windows providing low energy consumption and high visual comfort

Numerical Modeling of Regenerative Rotary Heat Exchanger: A Review

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