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Green Buildings and Sustainable Engineering pp 367–383Cite as

Heat Transfer Enhancement in a Circular Tube Fitted with Twisted Tape Having Continuous Cut Edges Using CuO-Water Nanofluid

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Abstract

The use of new kind of insert, namely twisted tape, having continuous cut edges in a horizontal circular tube with CuO-water nanofluid flowing in turbulent conditions was experimentally investigated for heat transfer enhancement and pressure drop penalty. The new twisted tape having rectangular cut made continuously on both the edges throughout the length is used with twist ratio 3 & 5, depth ratio (d/W) 0.025, and width ratio (w/W) 0.05. The experimental setup was validated by comparing the results obtained for water flowing in plain tube and tube with conventional twisted tape with the standard correlations. The CuO-water nanofluid in 0.5% volume concentration with 50 nm average nanoparticle size was used in investigations. The results of new twisted tape have been compared with the values for the plain tube and tube with conventional twisted tape for water and nanofluid both. In addition, the effects of the new twisted tape insert on the thermal performance factor are also investigated. It was concluded from the results that augmented rate of heat transfer can be accomplished with the use of twisted insert with continuous cut edges at the outlay of rational frictional penalty resulting in higher thermal performance factor.

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Abbreviations

A :

Heat transfer surface area, m2

c p :

Specific heat of fluid, kJ/kgK

D :

Inside diameter of the tube, mm

d :

Depth of cut, mm

f :

Friction factor

h :

Heat transfer coefficient, W/m2K

I :

Current, A

k :

Thermal conductivity of fluid, W/mK

L :

Length of the test section, m

m :

Mass flow rate of water, kg/s

Nu :

Nusselt Number

P :

Pressure, kPa

ΔP :

Pressure drop, kPa

Pr :

Prandtl Number

Q :

Heat transfer rate, W

Re :

Reynolds Number

t :

Thickness of the test tube, mm

ΔT :

Temperature difference, ºC

T :

Temperature, ºC

\(\tilde{T}\) :

Average temperature, ºC

U :

Mean axial flow velocity, m/s

V :

Voltage, V

w :

Width of cut, mm

W :

Twisted tape width, mm

y/W :

Twist ratio

ρ :

Fluid density, kg/m3

δ :

Twisted tape thickness, mm

µ :

Dynamic viscosity, kg/m-sec

η :

Thermal performance factor

b :

Bulk

c :

Convection

i :

Inlet

o :

Outlet

p :

Plain

s :

Surface

t :

Turbulator

w :

Water

PT :

Plain tube

TT :

Twisted tape

CCTT :

Continuous cut twisted tape

R-CCTT :

Continuous rectangular cut TT

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Authors and Affiliations

  1. Maulana Azad National Institute of Technology, Bhopal, MP, 462003, India

    Veeresh Fuskele & R. M. Sarviya

Authors
  1. Veeresh Fuskele
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  2. R. M. Sarviya
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Correspondence to Veeresh Fuskele .

Editor information

Editors and Affiliations

  1. Research and Testing Centre for Thermal Solar Systems (TZS), Institute of Thermodynamics and Thermal Engineering, University of Stuttgart, Stuttgart, Germany

    Harald Drück

  2. Department of Civil Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu, India

    Radhakrishna G. Pillai

  3. Department of Mechanical Engineering, Rajagiri School of Engineering and Technology, Kochi, Kerala, India

    Manoj G Tharian

  4. Department of Civil Engineering, Rajagiri School of Engineering and Technology, Kochi, Kerala, India

    Aysha Zeneeb Majeed

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Fuskele, V., Sarviya, R.M. (2019). Heat Transfer Enhancement in a Circular Tube Fitted with Twisted Tape Having Continuous Cut Edges Using CuO-Water Nanofluid. In: Drück, H., Pillai, R., Tharian, M., Majeed, A. (eds) Green Buildings and Sustainable Engineering. Springer Transactions in Civil and Environmental Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-13-1202-1_32

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  • DOI: https://doi.org/10.1007/978-981-13-1202-1_32

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  • Online ISBN: 978-981-13-1202-1

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