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Study on the numerical simulation method and influence of natural air-cooled outside cabin heat exchanger for wind power generation

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Abstract

For the outside cabin heat exchanger of wind power generation, the overall numerical simulation plays an important role in its design and optimization. The periodic iterative simulation method proposed in this paper makes up for the deficiency of analogy research using the local model in the previous research of plate-fin heat exchanger so that the research conclusions can be directly applied to practical engineering. The effectiveness of this method is verified by comparing 10 groups of simulation results with experimental results. It is concluded that the maximum relative error of the periodic iterative simulation method is 0.9%, which meets the requirements of engineering calculation. The number of iterations can be reduced to two when only the outlet average temperature is involved, which is more convenient than the dozens of iterations. Furthermore, the effects of altitude, air velocity, air temperature, wave fin structure parameters, and generator power on the performance of heat exchanger are comprehensively analyzed. The results show that larger naturally captured air volume, lower ambient temperature, and lower altitude can effectively reduce the outlet temperature of ethylene glycol solution. When the amplitude and wavelength of the corrugated fin on the airside of the heat exchanger are 0.6 mm and 20 mm respectively, the naturally captured air volume is effectively increased, the overall heat exchange performance of the heat exchanger is further improved.

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Abbreviations

T :

Average temperature / K

k :

Heat transfer coefficient /W·cm−2·℃−1

(x, y, z):

Cartesian coordinate

L :

Flow length of ethylene glycol /mm

W :

Flow length of air /mm

H :

The half-thickness of a single heat exchanger core /mm

L :

Uninterrupted length /mm

M :

Fin spacing /mm

h :

Fin height /mm

f :

The amplitude of wave fin /mm

V :

Air Velocity /m·s−1

ΔT :

The temperature difference between A and B /℃

Q :

Volume flow /m3/h

P :

Generator power /kw

ΔP :

Pressure drops between A and B /Pa

a :

Quadratic term ratio

b :

Coefficient of first-order term

n :

The number of iterations

\(\overline{d}\) :

Indicates that T is the relative error of \(T^{\prime}\)

T c :

Measuring average temperature/ ℃

\(T^{\prime}\) :

True average temperature / ℃

a :

Fluid diffusivity

ρ :

Density /kg·m−3

μ :

Dynamic viscosity coefficient /Pa·s

δ :

The thickness of the fin /mm

λ :

Length of the wave fin /mm

υ :

Velocity in x-direction /m·s−1

ν :

Velocity in y-direction /m·s−1

ω :

Velocity in z-direction /m·s−1

p :

Pressure / Pa

eg:

Ethylene glycol solution side

air:

Airside

in:

Inlet

out:

Outlet

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Acknowledgements

This work is supported by the National Natural Science Foundation of China (Grant No. 52174057), Postgraduate Practice Innovation Program of Jiangsu Province (Grant No. SJCX21_1286).

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Authors and Affiliations

  1. School of Petroleum Engineering, Changzhou University, Changzhou, 213164, China

    Nianyong Zhou, Wenbo Liu, Yixing Guo, Hao Feng, Haoping Peng, Yun Lei & Song Deng

  2. Avic Xinxiang Aviation Industry (Group) Co, LTD, Xinxiang, 453049, China

    Nianyong Zhou & Huarui Yang

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  1. Nianyong Zhou
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Correspondence to Nianyong Zhou or Haoping Peng.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Nianyong Zhou: Conceptualization, Methodology, Writing-original draft. Wenbo Liu: Conceptualization, Writing-review & editing. Yixing Guo: Validation, Writing-original draft. Hao Feng: Validation, Writing-original draft.

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Zhou, N., Liu, W., Guo, Y. et al. Study on the numerical simulation method and influence of natural air-cooled outside cabin heat exchanger for wind power generation. Heat Mass Transfer 58, 2129–2145 (2022). https://doi.org/10.1007/s00231-022-03193-3

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  • DOI: https://doi.org/10.1007/s00231-022-03193-3

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