Termohidravlična analiza obratovanja uparjalnika za ukapljeni naftni plin

Sani Bašič (Author), Leopold Škerget (Author), Matjaž Hriberšek (Author)

Abstract

Prispevek obravnava analizo obratovanja električnega uparjalnika za ukapljeni naftni plin. Na začetku je podan opis naprave in delovanje v ustaljenih obratovalnih razmerah. Nato je definiran cilj analize in vpeljan navidez osnosimetrični povez uparjalnika. Podane so vodilne enačbe toka newtonovske tekočine v območju sekundarne kapljevine za prenos toplote in toka skozi porozni grelnik. Definirani so robni pogoji na mejah računskega območja. Ločeno so podane osnovne karakteristike enačbe za vrednotenje prenosnih pojavov v posameznih delih uparjalnika. Poseben poudarek je namenjen razmeram konvektivnega uparjanja binarne zmesi v cevni vijačni spirali. Opisan je iterativni računski postopek, s katerim je doseženo končno obratovalno stanje naprave. Na koncu so predstavljeni dobljeni rezultati s komentarjem in sklepi. Za izbrane parametre je obratovalna točka uparjalnika znotraj predpisanih temperaturnih mej.

Keywords

analize termohidravlične;plini naftni ukapljeni;prenos toplote;uparjalniki

Data

Language:	Slovenian
Year of publishing:	2003
Typology:	1.01 - Original Scientific Article
Organization:	UM FS - Faculty of Mechanical Engineering
Publisher:	Association of Mechanical Engineers and Technicians of Slovenia et al.
UDC:	621.18:665.72:536.24
COBISS:	6669083
ISSN:	0039-2480
Parent publication:	Strojniški vestnik
Views:	657
Downloads:	25
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	ǂA ǂthermohydraulic analysis of a liquefied-petroleum-gas revaporizer
Secondary abstract:	This paper deals with the thermohydraulic characteristic of an electrical liquefied-petroleum-gas (LPG) revaporizer. To begin with both the revaporizer's description and its working performances are presented. The main goals of the analysis are defined and the quasi-axisymmetrical revaporizer section is introduced. The governing equations for Newtonian fluid flow in the region of the secondary liquid and for flow through a porous heater are presented. The boundary conditions on the computational region boundaries are prescribed. Further basic empirical corelations for the evolution of the transport phenomena within the individual revaporizer zones are presented. Special attention is devoted to the convective boiling process of the binary mixture in helicaly coiled tubes. The iterative calculating procedure with which we finally reached the working state of the device is explained. At the end the achieved results are discussed with comments and conclusions included.The operating point of the revaporizer was to lie inside the prescribed temperature range for the selected combination of process parameters.
Secondary keywords:	heat transfer;vaporizers;thermohydraulic analysis;liquified petroleum gas;prenos toplote;uparjalniki;analize termohidravlične;plini naftni ukapljeni;
URN:	URN:SI:UM:
Type (COBISS):	Not categorized
Pages:	str. 322-345
Volume:	ǂLetn. ǂ49
Issue:	ǂšt. ǂ6
Chronology:	2003
ID:	1746382