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Research Papers: Heat Exchangers

Numerical and Experimental Study on the Heat Transfer and Pressure Drop of Compact Cross-Corrugated Recuperators

[+] Author and Article Information
Zhou Guo-Yan

Key Laboratory of Pressure Systems
and Safety (MOE),
School of Mechanical and Power Engineering,
East China University of Science and Technology,
Shanghai 200237, China
e-mail: zhougy@ecust.edu.cn

Tu Shan-Tung

Key Laboratory of Pressure Systems
and Safety (MOE),
School of Mechanical and Power Engineering,
East China University of Science and Technology,
Shanghai 200237, China

Ma Hu-Gen

School of Energy and Power Engineering,
University of Shanghai for Science and Technology,
Shanghai 200093, China

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received February 26, 2013; final manuscript received February 26, 2014; published online March 26, 2014. Assoc. Editor: Wei Tong.

J. Heat Transfer 136(7), 071801 (Mar 26, 2014) (10 pages) Paper No: HT-13-1102; doi: 10.1115/1.4027072 History: Received February 26, 2013; Revised February 26, 2014

Recuperator is one of the key components in high temperature gas cooled reactors. Although cross-corrugated plates have been used to increase the thermal performance of the recuperators, the fundamental mechanisms of fluid flow and heat transfer are generally not clear. Fluid dynamics simulations and experiments are hence carried out to study the performance of the recuperators. A periodic cell is employed as the control volume. The flow field and heat transfer in sine-wave crossed-corrugated channels are investigated based on the Navier–Stokes and energy equations in the laminar flow regime between Re = 84 and 1168. The numerical results of the heat transfer factors and friction factors in different operating conditions show a fairly good agreement with the experimental measurements. The influence factors on the heat transfer and the hydraulic performance are also discussed in the paper. It is found that the heat transfer factor j and friction factor f decrease with the increase of the pitch-height ratio for a given Reynolds number.

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Figures

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Fig. 1

Cross-corrugated plate structure

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Fig. 2

Computational domain used for CFD modeling

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Fig. 3

Experimental apparatus

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Fig. 4

Sketch of experimental setup

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Fig. 5

Comparison of experimental results for standard testing core with theoretical solution

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Fig. 6

Experimental and numerical heat transfer factor j for different geometries

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Fig. 7

Experimental and numerical friction factor f for different geometries

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Fig. 8

Velocity distribution along normalized distance xL (for two cycles)

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Fig. 9

Temperature distribution along normalized distance xL (for two cycles)

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Fig. 10

Temperature distribution, K (for Hi = 2.5 mm)

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Fig. 11

Velocity distribution, m/s (for Hi = 2.5 mm)

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Fig. 12

Heat transfer factor j against P/Hi

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Fig. 13

Friction factor f against P/Hi

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