Advanced

Digital Reglering av Klimatprocesser (Digital Control of Climate Processes)

Jensen, Lars LU (1978) In PhD Theses TFRT-1014.
Abstract (Swedish)
Behovet av klimatreglering har ökat kraftigt sedan 1960-talet. Ett av skälen till detta är den ändrade byggtekníken, som innebär lättare konstruktioner med större inre värmebelastning från belysning, maskiner, personer och solinstrålning genom stora fönsterytor. De ökade värmebelastningarna kan klaras av med ett flertal olika klimatsystem. Dessa system kräver någon form av reglering. Under 1970-talet har kravet på bättre reglering ökat ytterligare på grund av de stigande energipriserna. Anläggningar förses med olika typer av värmeåtervinning, vilket komplicerar klimatsystemen och därmed också reglerutrustníngen.
Abstract
Results from a research project supported by the Swedish Council for Building Research are reported. The main task was to improve climate control technology. The work was focused on digital control. It was split up into three main tasks: model building, design of regulators, and fullscale experiments. Several rooms, airducts, and heat exchangers were modelled. Simple dynamic models have been derived from mass and energy balance equations. The correspondance with experimental models is rather crude. The main problem is to choose certain heat transfer coefficients. Several control experiments showed that the PI-regulator gives a good result in many cases. Adjustment of regulator parameters can be very time

consuming. In some cases a... (More)
Results from a research project supported by the Swedish Council for Building Research are reported. The main task was to improve climate control technology. The work was focused on digital control. It was split up into three main tasks: model building, design of regulators, and fullscale experiments. Several rooms, airducts, and heat exchangers were modelled. Simple dynamic models have been derived from mass and energy balance equations. The correspondance with experimental models is rather crude. The main problem is to choose certain heat transfer coefficients. Several control experiments showed that the PI-regulator gives a good result in many cases. Adjustment of regulator parameters can be very time

consuming. In some cases a solution is to use a self-tuning regulator. A simple self-tuning regulator, called the quotient regulator, has been developed. The computer technology makes it possible to implement better control principles. The experiments show that there is room for improvements of climate control systems and that substantial energy savings can sometimes be obtained. An interpretative process control language suitable for climate control is also described. (Less)
Please use this url to cite or link to this publication:
author
supervisor
opponent
  • unknown], [unknown
organization
publishing date
type
Thesis
publication status
published
subject
keywords
Uppvärmning, Ventilation, Reglerteknik, Datorstyrning, Digital teknik, Air conditioning, Mathematical models, Experimentation, Temperature control, Humidity control, Computer simulations
in
PhD Theses
volume
TFRT-1014
publisher
Department of Automatic Control, Lund Institute of Technology (LTH)
defense location
Lund, Tekniska fakulteten vid Lunds uiniversitet, sal M:A, Maskinhuset
defense date
1978-05-30 10:15
ISSN
0346-5500
language
Swedish
LU publication?
yes
id
b70160a4-8991-4fa9-9c31-a79f025db459 (old id 8524880)
date added to LUP
2016-01-28 11:22:14
date last changed
2016-10-31 10:19:29
@phdthesis{b70160a4-8991-4fa9-9c31-a79f025db459,
  abstract     = {Results from a research project supported by the Swedish Council for Building Research are reported. The main task was to improve climate control technology. The work was focused on digital control. It was split up into three main tasks: model building, design of regulators, and fullscale experiments. Several rooms, airducts, and heat exchangers were modelled. Simple dynamic models have been derived from mass and energy balance equations. The correspondance with experimental models is rather crude. The main problem is to choose certain heat transfer coefficients. Several control experiments showed that the PI-regulator gives a good result in many cases. Adjustment of regulator parameters can be very time<br/><br>
consuming. In some cases a solution is to use a self-tuning regulator. A simple self-tuning regulator, called the quotient regulator, has been developed. The computer technology makes it possible to implement better control principles. The experiments show that there is room for improvements of climate control systems and that substantial energy savings can sometimes be obtained. An interpretative process control language suitable for climate control is also described.},
  author       = {Jensen, Lars},
  issn         = {0346-5500},
  keyword      = {Uppvärmning,Ventilation,Reglerteknik,Datorstyrning,Digital teknik,Air conditioning,Mathematical models,Experimentation,Temperature control,Humidity control,Computer simulations},
  language     = {swe},
  publisher    = {Department of Automatic Control, Lund Institute of Technology (LTH)},
  school       = {Lund University},
  series       = {PhD Theses},
  title        = {Digital Reglering av Klimatprocesser (Digital Control of Climate Processes)},
  volume       = {TFRT-1014},
  year         = {1978},
}