Dynamics of two-heat exchanger network

Yoshiharu Amano, Takumi Hashizume

研究成果: Article

抄録

The dynamics of heat exchanger networks, parallel and series connections of two heat exchangers are investigated. Experiments of two steam-condensers cooled by water in tubes are performed and show intersting phenomena on both parallel- and series-heat exchanger networks. The characteristics of the parallel systems are mainly influenced by a stream splitting, i.e., the flow rate distribution and the transportation lag-time in the pipe connecting each heat exchanger and a confluence point. The magnitude and phase of water (cold stream) outlet temperature change against a water flow rate change input show fluctuations in the lower frequency range. In the same manner, the magnitude and phase of the series systems also show a fluctuation in a lower frequency range. These behaviors are caused by the effect of the size ratio of the primary heat exchanger to the secondary one and the lag-time in the pipe connecting each heat exchanger. Consequently, it is clarified that both the parallel and series systems are sensitive to the transportation lag-time in the pipe. The results shows the importance of a fluid transportation model in the pipe on the dynamics of the system.

元の言語English
ページ(範囲)755-760
ページ数6
ジャーナルNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
65
発行部数630
出版物ステータスPublished - 1999
外部発表Yes

Fingerprint

heat exchangers
Heat exchangers
Pipe
time lag
Steam condensers
flow velocity
frequency ranges
Flow rate
low frequencies
cold water
Water
water flow
condensers
outlets
steam
tubes
Fluids
fluids
water
Experiments

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics

これを引用

@article{3ed351bd864d4a51adb5842f160216de,
title = "Dynamics of two-heat exchanger network",
abstract = "The dynamics of heat exchanger networks, parallel and series connections of two heat exchangers are investigated. Experiments of two steam-condensers cooled by water in tubes are performed and show intersting phenomena on both parallel- and series-heat exchanger networks. The characteristics of the parallel systems are mainly influenced by a stream splitting, i.e., the flow rate distribution and the transportation lag-time in the pipe connecting each heat exchanger and a confluence point. The magnitude and phase of water (cold stream) outlet temperature change against a water flow rate change input show fluctuations in the lower frequency range. In the same manner, the magnitude and phase of the series systems also show a fluctuation in a lower frequency range. These behaviors are caused by the effect of the size ratio of the primary heat exchanger to the secondary one and the lag-time in the pipe connecting each heat exchanger. Consequently, it is clarified that both the parallel and series systems are sensitive to the transportation lag-time in the pipe. The results shows the importance of a fluid transportation model in the pipe on the dynamics of the system.",
keywords = "Heat exchanger, Heat exchanger network, Process control",
author = "Yoshiharu Amano and Takumi Hashizume",
year = "1999",
language = "English",
volume = "65",
pages = "755--760",
journal = "Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B",
issn = "0387-5016",
publisher = "Japan Society of Mechanical Engineers",
number = "630",

}

TY - JOUR

T1 - Dynamics of two-heat exchanger network

AU - Amano, Yoshiharu

AU - Hashizume, Takumi

PY - 1999

Y1 - 1999

N2 - The dynamics of heat exchanger networks, parallel and series connections of two heat exchangers are investigated. Experiments of two steam-condensers cooled by water in tubes are performed and show intersting phenomena on both parallel- and series-heat exchanger networks. The characteristics of the parallel systems are mainly influenced by a stream splitting, i.e., the flow rate distribution and the transportation lag-time in the pipe connecting each heat exchanger and a confluence point. The magnitude and phase of water (cold stream) outlet temperature change against a water flow rate change input show fluctuations in the lower frequency range. In the same manner, the magnitude and phase of the series systems also show a fluctuation in a lower frequency range. These behaviors are caused by the effect of the size ratio of the primary heat exchanger to the secondary one and the lag-time in the pipe connecting each heat exchanger. Consequently, it is clarified that both the parallel and series systems are sensitive to the transportation lag-time in the pipe. The results shows the importance of a fluid transportation model in the pipe on the dynamics of the system.

AB - The dynamics of heat exchanger networks, parallel and series connections of two heat exchangers are investigated. Experiments of two steam-condensers cooled by water in tubes are performed and show intersting phenomena on both parallel- and series-heat exchanger networks. The characteristics of the parallel systems are mainly influenced by a stream splitting, i.e., the flow rate distribution and the transportation lag-time in the pipe connecting each heat exchanger and a confluence point. The magnitude and phase of water (cold stream) outlet temperature change against a water flow rate change input show fluctuations in the lower frequency range. In the same manner, the magnitude and phase of the series systems also show a fluctuation in a lower frequency range. These behaviors are caused by the effect of the size ratio of the primary heat exchanger to the secondary one and the lag-time in the pipe connecting each heat exchanger. Consequently, it is clarified that both the parallel and series systems are sensitive to the transportation lag-time in the pipe. The results shows the importance of a fluid transportation model in the pipe on the dynamics of the system.

KW - Heat exchanger

KW - Heat exchanger network

KW - Process control

UR - http://www.scopus.com/inward/record.url?scp=71249091904&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=71249091904&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:71249091904

VL - 65

SP - 755

EP - 760

JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

SN - 0387-5016

IS - 630

ER -