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Investigation of Liquid Vaporization Characteristics at Low–Pressure Conditions

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Fluid Mechanics and Fluid Power, Volume 5 (FMFP 2022)

Part of the book series: Lecture Notes in Mechanical Engineering ((LNME))

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Abstract

An experimental study has been implemented to examine water pool sudden flash evaporation in a cuboidal chamber. Some key parameters have been studied such as initial vacuum tank pressure, superheat, and initial water temperature. The initial water volume is set to one liter only. Initial conditions of the liquid vary from 50 °C to 85 °C temperature and vacuum tank pressure 6.33 kPa and 20.63 kPa (abs.) which corresponds to 2 °C to 38 °C superheat. Moreover, the influence of these key parameters on the thermo- properties like water pool temperature, mass evaporated, nonequilibrium fraction (NEF), and heat transfer coefficient (h) are analyzed. The experimental results showed that lower vacuum tank pressure and greater superheat have larger impact on flashing phenomenon. Results suggested that a larger value of the NEF and h take place at the beginning of the flash. The value of heat transfer coefficient found to be time dependent function tends to decrease with flash time passes.

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Abbreviations

A:

Area of flash chamber (m2)

Ps:

Saturation pressure (kPa)

P:

Flash chamber pressure (kPa)

Pv:

Vacuum tank pressure (kPa)

Pv,0:

Initial Vacuum tank pressure (kPa)

Tw:

Water temperature (°C)

Tw,0:

Initial Water temperature (°C)

Te:

Equilibrium temperature (°C)

∆T:

Degree of superheat (°C)

mw,v:

Water mass vaporized (g)

Vw:

Water volume (L)

Vw,0:

Initial Water volume (L)

t:

Time (s)

cp:

Specific heat (kJ/kgK)

hf,g:

Latent heat of the vapor (kJ/kg)

h:

Volumetric heat transfer coefficient (kW/m3K)

ρ:

Water density (kg/m3)

NEF:

Non equilibrium fraction

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Authors and Affiliations

  1. Department of Mechanical Engineering, IIT Jodhpur, Jodhpur, Rajasthan, 342030, India

    Sarvjeet Singh, Jaydip Basak, Prodyut Chakraborty & Hardik Kothadia

Authors
  1. Sarvjeet Singh
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  2. Jaydip Basak
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  3. Prodyut Chakraborty
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  4. Hardik Kothadia
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Corresponding author

Correspondence to Hardik Kothadia .

Editor information

Editors and Affiliations

  1. Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India

    Krishna Mohan Singh

  2. Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India

    Sushanta Dutta

  3. Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, India

    Sudhakar Subudhi

  4. Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India

    Nikhil Kumar Singh

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Singh, S., Basak, J., Chakraborty, P., Kothadia, H. (2024). Investigation of Liquid Vaporization Characteristics at Low–Pressure Conditions. In: Singh, K.M., Dutta, S., Subudhi, S., Singh, N.K. (eds) Fluid Mechanics and Fluid Power, Volume 5. FMFP 2022. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-99-6074-3_15

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  • DOI: https://doi.org/10.1007/978-981-99-6074-3_15

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-99-6073-6

  • Online ISBN: 978-981-99-6074-3

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