Comparisons of Nu correlations for H 2 O/LiBr solution in plate heat exchanger for triple effect absorption chiller application

Joo Young Song, Jae Won Lee, Yong Tae Kang

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this study, heat transfer characteristics of single-phase Water/Lithium Bromide (H 2 O/LiBr) solution in a plate heat exchanger (PHE) is evaluated for absorption chiller applications. The plate heat exchanger is arranged with single-pass and counter flow, and the chevron angle of corrugated plate is a high theta of 78.5°. The H 2 O/LiBr solution is used as working fluid with wide mass concentration ranging between 52.40% and 64.92%, Reynolds number ranging between 27.29 and 255.1 and Prandtl number ranging between 4.59 and 19.26. All of experiments are conducted within ±10% energy balance error range. It is found that the convective heat transfer coefficients range from 0.68 kW/m 2 ·K to 2.92 kW/m 2 ·K. Based on the experimental data, empirical Nusselt number correlation of the H 2 O/LiBr solution in the 78.5° plate heat exchanger is developed within ±20% error range. The Nusselt number correlation of the present study is applicable to predict the heat transfer characteristics of the H 2 O/LiBr solution with a wide range of LiBr concentration for triple effect absorption chiller applications.

Original languageEnglish
Pages (from-to)852-860
Number of pages9
JournalEnergy
Volume172
DOIs
Publication statusPublished - 2019 Apr 1

Fingerprint

Heat exchangers
Nusselt number
Heat transfer
Prandtl number
Energy balance
Heat transfer coefficients
Reynolds number
Lithium
Hydrogen
Fluids
Water
Experiments

Keywords

  • Absorption cycle
  • H O/LiBr solution
  • Heat transfer coefficient
  • LiBr concentration
  • Plate heat exchanger

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Pollution
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

Cite this

Comparisons of Nu correlations for H 2 O/LiBr solution in plate heat exchanger for triple effect absorption chiller application . / Song, Joo Young; Lee, Jae Won; Kang, Yong Tae.

In: Energy, Vol. 172, 01.04.2019, p. 852-860.

Research output: Contribution to journalArticle

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N2 - In this study, heat transfer characteristics of single-phase Water/Lithium Bromide (H 2 O/LiBr) solution in a plate heat exchanger (PHE) is evaluated for absorption chiller applications. The plate heat exchanger is arranged with single-pass and counter flow, and the chevron angle of corrugated plate is a high theta of 78.5°. The H 2 O/LiBr solution is used as working fluid with wide mass concentration ranging between 52.40% and 64.92%, Reynolds number ranging between 27.29 and 255.1 and Prandtl number ranging between 4.59 and 19.26. All of experiments are conducted within ±10% energy balance error range. It is found that the convective heat transfer coefficients range from 0.68 kW/m 2 ·K to 2.92 kW/m 2 ·K. Based on the experimental data, empirical Nusselt number correlation of the H 2 O/LiBr solution in the 78.5° plate heat exchanger is developed within ±20% error range. The Nusselt number correlation of the present study is applicable to predict the heat transfer characteristics of the H 2 O/LiBr solution with a wide range of LiBr concentration for triple effect absorption chiller applications.

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KW - LiBr concentration

KW - Plate heat exchanger

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