Performance of Rotary Heat and Mass Exchangers

Stiesch, Gunnar; Klein, S.A.; Mitchell, J. W.

doi:10.1080/10789669.1995.10391327

Cited by 23 publications

(14 citation statements)

References 12 publications

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“…(5) (6) These energy equations, which are written with temperature as the dependent variable, are almost identical to those derived by Stiesch et al (1995) and Zheng and Worek (1993), who use enthalpy as the dependent variable (Simonsons and Besant, 1997).…”

Section: Governing Equations and Numerical Modelingmentioning

confidence: 49%

“…London, 1984;Shah and Subbarao, 1988). In many heat transfer publications the classical definition of effectiveness is applied to sensible heat transfers with no moisture transfer (Shah and Subbarao, 1988;Stiesch et al, 1995). Recent experimental and theoretical evidence show that for a range of inlet temperatures and humidity, the effectiveness of regenerative heat exchangers is not constant (Stiesch et al, 1995;Simonsons et al, 1998).…”

Section: Analytical Study Of Effectiveness For Regenerative Rotary Rementioning

confidence: 99%

“…They modified the finite difference solution to study the behavior of the enthalpy exchangers at very cold conditions. Stiesch et al (1995) presented the heat and mass transfer governing equations for rotary regenerative heat exchangers. They formulate those equations based on the mass and energy conservation equations combined with some assumptions for the rotary regenerative heat exchanger.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Governing Equations and Numerical Modelingmentioning

confidence: 49%

Section: Analytical Study Of Effectiveness For Regenerative Rotary Rementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical Modeling of Regenerative Rotary Heat Exchanger: A Review

Baruah¹,

Kumar²

2017

Journal of Biosystems Engineering

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“…Examples of related studies include applications in desiccant dehumidification [1][2][3][4][5][6][7][8], regenerative energy recovery [9][10][11][12][13], as well studies aimed at both cases [14][15][16][17][18][19][20][21]. In dehumidification, regenerators comprise desiccant wheels, having a relatively high sorbent content and operating at slower speeds, whereas in energy recovery enthalpy wheels are used, those of which have a much lower fraction of sorbent and operate at higher speeds.…”

Section: Introductionmentioning

confidence: 99%

Parametric analysis of heat and mass transfer regenerators using a generalized effectiveness-NTU method

Sphaier

Worek

2009

International Journal of Heat and Mass Transfer

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“…In order to better describe these processes in mathematical terms, different formulations have been adopted over the past years. Most formulations are composed of simple one-dimensional equations [1][2][3][4][5][6], in which the diffusional phenomena within the porous desiccant substrate are not locally considered. Some investigations adopt two-dimensional formulations, actually considering the thermal and mass diffusion in the desiccant substrate as local phenomena [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%