Naslov
A Simple Model of a Thermostatic Expansion Valve Suitable for Control Purposes

Autori
Pavković, Branimir

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
1st International Conference on Computer Aided Design and Manufacturing - Selected Papers / Obsieger, Boris - Rijeka : Revelin, Zigo, 2003, 79-86

Skup
1st International Conference on Computer Aided Design and Manufacturing CADAM 2003

Mjesto i datum
Šibenik, Hrvatska, 30.09.2003. - 03.10.2003

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
modeling; refrigeration system; thermostatic expansion valve; transients

Sažetak
The thermostatic expansion valve model, suitable for control purposes is developed as a part of a dynamic model of a refrigeration machine. A set of experimentally acquired values is used to determine coefficients of polynomials describing valve needle displacement and the refrigerant flow area for any combination of evaporator leaving refrigerant pressure, bulb temperature and position of a static superheat adjustment screw. Refrigerant mass flow is evaluated with known flow area and pressure difference between condenser and the evaporator of a refrigeration machine. Bulb dynamics is taken into account through the exponential function, using the bulb time constant, which was determined experimentally. It has been shown that simulation results correspond well with data achieved by measurement on a real refrigeration system.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA