ΑΠΟΛΥΤΗ ΜΕΘΟΔΟΣ ΜΕΤΡΗΣΗΣ ΘΕΡΜΙΚΗΣ ΑΓΩΓΙΜΟΤΗΤΑΣ ΥΓΡΩΝ

A NEW INSTRUMENT FOR THE MEASUREMENT OF THE THERMAL CONDUCTIVITY OF BOTH ELECTRICALLY INSULATING AND ELECTRICALLY CONDUCTING LIQUIDS, HAS BEEN DESIGNED, BUILTAND COMMISSIONED. THIS INSTRUMENT IS DESIGNED TO OPERATE IN THE TEMPERATURE RANGE 20-90 C AT ATMOSPHERIC PRESSURE WITH AN ASSOCIATED ACCURACY OF +0.5% OF THEABSOLUTE THERMAL CONDUCTIVITY VALUES. THE CONSTRUCTION OF THIS INSTRUMENT, WHICH IS BASED UPON THE TRANSIENT HOT WIRE PRINCIPLE, WAS IMPLEMENTED IN TWO STAGES. IN THE FIRST STAGE, A NEW COMPUTER CONTROLLED WHEATSTONE TYPE BRIDGE WAS DESIGNED AND ASSEMBLED. FOR THE HEAT SOURCE, TWO THIN PLATINUM WIRES WERE EMPLOYED. TO CONFIRM THE PERFORMANCE OF THIS ARRANGEMENT, THE THERMAL CONDUCTIVITY OF TOLUENE WAS MEASURED. THE RESULTS SHOWED A GOOD AGREEMENT WITH EARLIER WORK, HEXANE, HEPTANE, DECANE, BENZENE, XYLENE ISOMERS WAS CONSEQUENTLY MEASURED IN THE TEMPERATURE RANGE 20-90 C. IN THE SECOND STAGE FOR THE ELECTRICALLY CONDUCTING LIQUIDS THE PLATINUM WIRES WERE SUBSTITUTED BY TWO THIN TANTALUM WIRES, WHICH WERE ANODICALLY COATED WITH THEIR OXIDE. (SHORTENED)

Grantor dc:publisher

Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ)

Year dc:date

1990

Author dc:creator

• Χαριτίδου, Ελένη

• BENZENE ALCOHOLS MIXTURES OF ALCOHOLS WITH WATER PREDICTION OF THERMAL CONDUCTIVITY
• ELECTRICALLY CONDUCTING LIQUIDS
• GLYCOLS-MIXTURES OF GLYCOLS WITH WATER
• HEXANE HEPTANE DECANE XYLENE ISOTHERMS
• THERMAL CONDUCTIVITY TRANSIENT HOT WIRE METHOD
• ΒΕΝΖΟΛΙΟ ΑΛΚΟΟΛΕΣ ΥΔΑΤΙΚΑ ΔΙΑΛΥΜΑΤΑ ΑΛΚΟΟΛΩΝ
• ΓΛΥΚΟΛΕΣ-ΥΔΑΤΙΚΑ ΔΙΑΛΥΜΑΤΑ ΓΛΥΚΟΛΩΝ
• ΗΛΕΚΤΡΙΚΑ ΑΓΩΓΙΜΑ ΥΓΡΑ
• Θερμική αγωγιμότητα
• ΜΕΘΟΔΟΣ ΘΕΡΜΑΙΝΟΜΕΝΟΥ ΣΥΡΜΑΤΟΣ
• ΜΟΝΤΕΛΟ ΠΡΟΒΛΕΨΗΣ ΘΕΡΜΙΚΗΣ ΑΓΩΓΙΜΟΤΗΤΑΣ ΥΓΡΩΝ
• ΣΥΣΧΕΤΙΣΗ ΣΥΝΤ.ΘΕΡΜΙΚΗΣ ΑΓΩΓΙΜΟΤΗΤΑΣ ΚΑΙ ΙΞΩΔΟΥΣ
• ΤΟΛΟΥΟΛΙΟ ΕΞΑΝΙΟ ΕΠΤΑΝΙΟ ΔΕΚΑΝΙΟ Ο,Μ,Π,ΞΥΛΟΛΙΟ
• Engineering and Technology
• Chemical Engineering
• Επιστήμες Μηχανικού και Τεχνολογία
• Επιστήμη Χημικού Μηχανικού

Language dc:language

gre

Identifier

10.12681/eadd/1707

OAI identifier oai:identifier

oai:10442/1707