Effect of fresh air purging on the efficiency of energy recovery from exhaust air in rotary regenerators

Worsoe-Schmidt, P.

doi:10.1016/0140-7007(91)90008-5

Cited by 16 publications

(10 citation statements)

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“…Contamination of the fresh air with exhaust air cannot be allowed in some air-conditioning applications; therefore, a small section of the rotary regenerator, which is called cleaning region, between the hot and the cold zone is purged with fresh air in order to avoid such contamination [1].…”

Section: Calculation Proceduresmentioning

confidence: 99%

“…The correction factor for rotational speed (ϕ r ) can also be calculated using the equation given by Worsφe-Schmidt [1]:…”

Section: Correction Factor For Rotational Speedmentioning

confidence: 99%

“…Today, heat exchanger manufacturers offer several types of equipment based on the transfer process, construction, flow arrangements, and heat transfer mechanism. For air-conditioning applications, rotary regenerative heat exchangers ( Figure 1) have certain advantages over other types of heat exchangers for the recovery of heat from exhaust air [1]. Two distinct advantages are that (1) a considerably larger and relatively less expensive heat transfer area per unit volume can be used, and (2) this type of heat exchanger has higher efficiencies.…”

mentioning

confidence: 99%

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Design of Regenerative Heat Exchangers

Yılmaz

Büyükalaca

2003

Heat Transfer Engineering

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Section: Calculation Proceduresmentioning

confidence: 99%

“…The correction factor for rotational speed (ϕ r ) can also be calculated using the equation given by Worsφe-Schmidt [1]:…”

Section: Correction Factor For Rotational Speedmentioning

confidence: 99%

mentioning

confidence: 99%

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Design of Regenerative Heat Exchangers

Yılmaz

Büyükalaca

2003

Heat Transfer Engineering

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“…Skiepko [3,4] investigated the effects of heat conduction in the matrix, Peclet number and the length of the matrix on the preheater performance [5,6]. Investigating on the effect of separator plate on the preheater performance, Worsoe-Schmidt [7] stated that although the separator decreases the efficiency of the exchanger, but it cannot be removed due to its role in the reduction of the fluid leakage. Based on the several experimental and numerical analyses, Ghodsipour and Sadrameli [8] studied the effect of mass flow rate and rotational speed of the matrix on the preheater performance and showed that the flow rate effect was more significant than the rotational speed.…”

Section: Introductionmentioning

confidence: 98%

Three-dimensional simulation of rotary air preheater in steam power plant

Heidari-Kaydan

Hajidavalloo

2014

Applied Thermal Engineering

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“…Several researchers have done different studies on the rotary heat exchanger, both numerically and experimentally. The regenerative rotary heat exchanger has certain advantages over other types of heat exchangers for the recovery of heat from the exhaust air of any engine (Schmidt, 1991). Two major advantages that rotary heat exchangers have are (i) a considerably larger heat transfer area per unit volume and (ii) a comparatively lower cost, and it has a higher effectiveness compared to other types of heat exchangers.…”

Section: Introductionmentioning

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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Effect of fresh air purging on the efficiency of energy recovery from exhaust air in rotary regenerators

Cited by 16 publications

References 1 publication

Design of Regenerative Heat Exchangers

Design of Regenerative Heat Exchangers

Three-dimensional simulation of rotary air preheater in steam power plant

Numerical Modeling of Regenerative Rotary Heat Exchanger: A Review

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