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Modellbygge och simulering av värmebatteri

Halling, Lars and Zeidler, Tomas (1990) In MSc Theses
Department of Automatic Control
Abstract
The purpose of this master thesis has been to find a simulation model for a crossflow heat exchanger in an air conditioning plant. The air temperature was controlled by changing the relation between hot water and recirculated water from the heat exchanger. The model which was obtained partly from literature studies was based on physical relations describing the heat transfer and energy balance. The results of the simulations were compared with measured data. We chose to study step responses to changes in the valve position. The step responses were similar to a first order step response with a time delay. The time constant obtained from the simulations showed good agreement with measured data, while the stationary gain in some cases... (More)
The purpose of this master thesis has been to find a simulation model for a crossflow heat exchanger in an air conditioning plant. The air temperature was controlled by changing the relation between hot water and recirculated water from the heat exchanger. The model which was obtained partly from literature studies was based on physical relations describing the heat transfer and energy balance. The results of the simulations were compared with measured data. We chose to study step responses to changes in the valve position. The step responses were similar to a first order step response with a time delay. The time constant obtained from the simulations showed good agreement with measured data, while the stationary gain in some cases differed more than 30% although the difference in most cases was less than 20%. (Less)
Please use this url to cite or link to this publication:
author
Halling, Lars and Zeidler, Tomas
supervisor
organization
year
type
H3 - Professional qualifications (4 Years - )
subject
keywords
Crossflow heat exchanger, modeling, dynamic properties
publication/series
MSc Theses
report number
TFRT-5424
ISSN
0280-5316
language
Swedish
id
8849272
date added to LUP
2016-03-25 21:23:43
date last changed
2016-03-25 21:23:43
@misc{8849272,
  abstract     = {The purpose of this master thesis has been to find a simulation model for a crossflow heat exchanger in an air conditioning plant. The air temperature was controlled by changing the relation between hot water and recirculated water from the heat exchanger. The model which was obtained partly from literature studies was based on physical relations describing the heat transfer and energy balance. The results of the simulations were compared with measured data. We chose to study step responses to changes in the valve position. The step responses were similar to a first order step response with a time delay. The time constant obtained from the simulations showed good agreement with measured data, while the stationary gain in some cases differed more than 30% although the difference in most cases was less than 20%.},
  author       = {Halling, Lars and Zeidler, Tomas},
  issn         = {0280-5316},
  keyword      = {Crossflow heat exchanger,modeling,dynamic properties},
  language     = {swe},
  note         = {Student Paper},
  series       = {MSc Theses},
  title        = {Modellbygge och simulering av värmebatteri},
  year         = {1990},
}