Absorption of high concentration NH3/H2O in a plate heat exchanger

Xuan Tao; C.A. Infante Ferreira

Absorption of high concentration NH3/H2O in a plate heat exchanger

Engineering Thermodynamics

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

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Abstract

High concentration NH3/H2O is suitable for Kalina cycles used for the recovery of low grade heat. Plate heat exchangers (PHEs) are compact and reduce the charge of working fluid. This work investigates the absorption of NH3/H2O in a PHE, which has a weight concentration of 96%. Being different from normal absorption systems, the concentration difference between vapor and liquid is small, and apparent heat transfer coefficients (HTCs) are used to interpret the phase change process, which assumes that the vapor and liquid are in equilibrium state. The apparent HTCs and frictional pressure drop of NH3/H2O are presented and are compared with those of NH3. The mass transfer resistance has noticeable influences on heat transfer depending on the flow patterns, while the influence on frictional pressure drop is minor.

Original language	English
Title of host publication	ISHPC 2021 Proceedings
Editors	Thomas Meyer
Publisher	Technische Universität Berlin
Pages	108-111
Publication status	Published - 2021
Event	International Sorption Heat Pump Conference 2021 - Berlin, Germany, Berlin, Germany Duration: 22 Aug 2021 → 25 Aug 2021 http://dx.doi.org/10.14279/depositonce-10430.2

Conference

Conference	International Sorption Heat Pump Conference 2021
Abbreviated title	ISHPC 2021
Country/Territory	Germany
City	Berlin
Period	22/08/21 → 25/08/21
Internet address	http://dx.doi.org/10.14279/depositonce-10430.2

Keywords

Plate heat exchangers
Ammonia-water mixture
Heat transfer coefficient
Pressure drop

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Paper IISHPC2021_49Final published version, 868 KBLicence: CC BY-NC

Cite this

@inproceedings{7407e23a0b5d4273b79c0b28aaf78ee0,

title = "Absorption of high concentration NH3/H2O in a plate heat exchanger",

abstract = "High concentration NH3/H2O is suitable for Kalina cycles used for the recovery of low grade heat. Plate heat exchangers (PHEs) are compact and reduce the charge of working fluid. This work investigates the absorption of NH3/H2O in a PHE, which has a weight concentration of 96%. Being different from normal absorption systems, the concentration difference between vapor and liquid is small, and apparent heat transfer coefficients (HTCs) are used to interpret the phase change process, which assumes that the vapor and liquid are in equilibrium state. The apparent HTCs and frictional pressure drop of NH3/H2O are presented and are compared with those of NH3. The mass transfer resistance has noticeable influences on heat transfer depending on the flow patterns, while the influence on frictional pressure drop is minor.",

keywords = "Plate heat exchangers, Ammonia-water mixture, Heat transfer coefficient, Pressure drop",

author = "Xuan Tao and {Infante Ferreira}, C.A.",

year = "2021",

language = "English",

pages = "108--111",

editor = "Meyer, {Thomas }",

booktitle = "ISHPC 2021 Proceedings",

publisher = "Technische Universit{\"a}t Berlin",

note = "International Sorption Heat Pump Conference 2021, ISHPC 2021 ; Conference date: 22-08-2021 Through 25-08-2021",

url = "http://dx.doi.org/10.14279/depositonce-10430.2",

}

TY - GEN

T1 - Absorption of high concentration NH3/H2O in a plate heat exchanger

AU - Tao, Xuan

AU - Infante Ferreira, C.A.

PY - 2021

Y1 - 2021

N2 - High concentration NH3/H2O is suitable for Kalina cycles used for the recovery of low grade heat. Plate heat exchangers (PHEs) are compact and reduce the charge of working fluid. This work investigates the absorption of NH3/H2O in a PHE, which has a weight concentration of 96%. Being different from normal absorption systems, the concentration difference between vapor and liquid is small, and apparent heat transfer coefficients (HTCs) are used to interpret the phase change process, which assumes that the vapor and liquid are in equilibrium state. The apparent HTCs and frictional pressure drop of NH3/H2O are presented and are compared with those of NH3. The mass transfer resistance has noticeable influences on heat transfer depending on the flow patterns, while the influence on frictional pressure drop is minor.

AB - High concentration NH3/H2O is suitable for Kalina cycles used for the recovery of low grade heat. Plate heat exchangers (PHEs) are compact and reduce the charge of working fluid. This work investigates the absorption of NH3/H2O in a PHE, which has a weight concentration of 96%. Being different from normal absorption systems, the concentration difference between vapor and liquid is small, and apparent heat transfer coefficients (HTCs) are used to interpret the phase change process, which assumes that the vapor and liquid are in equilibrium state. The apparent HTCs and frictional pressure drop of NH3/H2O are presented and are compared with those of NH3. The mass transfer resistance has noticeable influences on heat transfer depending on the flow patterns, while the influence on frictional pressure drop is minor.

KW - Plate heat exchangers

KW - Ammonia-water mixture

KW - Heat transfer coefficient

KW - Pressure drop

UR - http://dx.doi.org/10.14279/depositonce-10430

M3 - Conference contribution

SP - 108

EP - 111

BT - ISHPC 2021 Proceedings

A2 - Meyer, Thomas

PB - Technische Universität Berlin

T2 - International Sorption Heat Pump Conference 2021

Y2 - 22 August 2021 through 25 August 2021

ER -

Absorption of high concentration NH3/H2O in a plate heat exchanger

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Keywords

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