28 research outputs found
Heat transfer of bubbly flow on inner wall of annular channel
Experimental investigations of heat transfer from the heated wall to the two-phase bubbly flow were performed in vertical annular channel using air-water system. The IR-thermography and miniature temperature sensors were used to measure heat transfer coefficients. The influence of bubbles on heat transfer is shown in comparison with the case of single phase flow. The presence of bubbles in the flow leads to heat transfer intensification in the annular channel even for low void fractions
Π‘ΠΎΡΠ±ΡΠΈΡ ΡΡΠΈΠ»Π°ΠΌΠΈΠ½ΠΎΠ² ΠΈΠ· Π²ΠΎΠ·Π΄ΡΡ Π° Π²ΠΎΠ»ΠΎΠΊΠ½ΠΈΡΡΡΠΌΠΈ ΠΈΠΎΠ½ΠΈΡΠ°ΠΌΠΈ. 2.Π‘Π»Π°Π±ΠΎΠΊΠΈΡΠ»ΠΎΡΠ½ΡΠΉ ΠΊΠ°ΡΠ±ΠΎΠΊΡΠΈΠ»ΡΠ½ΡΠΉ ΠΊΠ°ΡΠΈΠΎΠ½ΠΈΡ Π€ΠΈΠ±Π°Π½ Π-4
Sorption properties of fibrous weak acid cation exchanger FIBAN K-4 have been investigated for sorption of mono-, di- and triethylamine from air. It has been found that main factors governing sorption effectiveness are: a) relative humidity; b) kinetic factors (aminesβ low diffusion speed into the ion exchanger phase). Increased swelling for the ion exchanger in the amine ionic form has been observed. By ab initio quantum chemical calculations it has been shown that water molecules in the ion exchanger are located between amine molecules (ions) and functional groups, forming an intermediate layer.ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Ρ ΡΠΎΡΠ±ΡΠΈΠΎΠ½Π½ΡΠ΅ ΡΠ²ΠΎΠΉΡΡΠ²Π° Π²ΠΎΠ»ΠΎΠΊΠ½ΠΈΡΡΠΎΠ³ΠΎ ΠΊΠ°ΡΠ±ΠΎΠΊΡΠΈΠ»ΡΠ½ΠΎΠ³ΠΎ ΠΊΠ°ΡΠΈΠΎΠ½ΠΈΡΠ° Π€ΠΠΠΠ Π-4 ΠΏΡΠΈ ΡΠΎΡΠ±ΡΠΈΠΈ ΠΈΠ· Π²ΠΎΠ·Π΄ΡΡ
Π° ΡΡΠΈΠ»Π°ΠΌΠΈΠ½Π°, Π΄ΠΈΡΡΠΈΠ»Π°ΠΌΠΈΠ½Π° ΠΈ ΡΡΠΈΡΡΠΈΠ»Π°ΠΌΠΈΠ½Π° Π² Π΄ΠΈΠ½Π°ΠΌΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΡΠ»ΠΎΠ²ΠΈΡΡ
ΠΏΡΠΈ ΡΠ°Π·Π»ΠΈΡΠ½ΠΎΠΉ ΠΎΡΠ½ΠΎΡΠΈΡΠ΅Π»ΡΠ½ΠΎΠΉ Π²Π»Π°ΠΆΠ½ΠΎΡΡΠΈ. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ ΠΎΡΠ½ΠΎΡΠΈΡΠ΅Π»ΡΠ½Π°Ρ Π²Π»Π°ΠΆΠ½ΠΎΡΡΡ (Π° ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²Π΅Π½Π½ΠΎ Π²Π»Π°Π³ΠΎΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΠ΅ ΠΈΠΎΠ½ΠΈΡΠ°) ΡΠ²Π»ΡΠ΅ΡΡΡ ΠΊΠ»ΡΡΠ΅Π²ΠΎΠΉ ΡΠΎΡΡΠ°Π²Π»ΡΡΡΠ΅ΠΉ, ΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΡΡΠ΅ΠΉ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΡΠΎΡΠ±ΡΠΈΠΈ. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ ΠΏΡΠΈ ΡΠΎΡΠ±ΡΠΈΠΈ Π°ΠΌΠΌΠΈΠ°ΠΊΠ° ΠΈ ΡΡΠΈΠ»Π°ΠΌΠΈΠ½ΠΎΠ² ΠΈΠ· Π²ΠΎΠ·Π΄ΡΡ
Π° Π΄ΠΎΠΏΠΎΠ»Π½ΠΈΡΠ΅Π»ΡΠ½ΡΠΌ ΡΠ°ΠΊΡΠΎΡΠΎΠΌ, ΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΡΡΠΈΠΌ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΡΠΎΡΠ±ΡΠΈΠΈ, ΡΠ²Π»ΡΠ΅ΡΡΡ Π½Π΅ ΠΊΠΈΡΠ»ΠΎΡΠ½ΠΎ-ΠΎΡΠ½ΠΎΠ²Π½Π°Ρ ΡΠΈΠ»Π° ΠΈΠ·Π²Π»Π΅ΠΊΠ°Π΅ΠΌΠΎΠ³ΠΎ ΡΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΡ, Π° ΠΊΠΈΠ½Π΅ΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΡΠ°ΠΊΡΠΎΡΡ, ΡΠ²ΡΠ·Π°Π½Π½ΡΠ΅ Ρ ΠΌΠ΅Π΄Π»Π΅Π½Π½ΠΎΡΡΡΡ Π΄ΠΈΡΡΡΠ·ΠΈΠΈ ΠΌΠΎΠ»Π΅ΠΊΡΠ» Π°ΠΌΠΈΠ½ΠΎΠ² Π² Π½Π΅ΠΏΠΎΠ»Π½ΠΎΡΡΡΡ Π½Π°Π±ΡΡ
ΡΠ΅ΠΌ ΠΈΠΎΠ½ΠΈΡΠ΅. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ Π½Π°Π±ΡΡ
Π°Π½ΠΈΠ΅ ΠΊΠ°ΡΠ±ΠΎΠΊΡΠΈΠ»ΡΠ½ΠΎΠ³ΠΎ ΠΊΠ°ΡΠΈΠΎΠ½ΠΈΡΠ° ΡΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΠΎ ΡΠ²Π΅Π»ΠΈΡΠΈΠ²Π°Π΅ΡΡΡ (Π² 2-3 ΡΠ°Π·Π° ΠΏΠΎ ΡΡΠ°Π²Π½Π΅Π½ΠΈΡ Ρ ΠΈΡΡ
ΠΎΠ΄Π½ΠΎΠΉ Π-ΡΠΎΡΠΌΠΎΠΉ) ΠΏΡΠΈ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΠΈ ΡΡΠ΅ΠΏΠ΅Π½ΠΈ Π½Π΅ΠΉΡΡΠ°Π»ΠΈΠ·Π°ΡΠΈΠΈ ΠΊΠ°ΡΠ±ΠΎΠΊΡΠΈΠ»ΡΠ½ΡΡ
Π³ΡΡΠΏΠΏ Π΄ΠΈ- ΠΈ ΡΡΠΈΡΡΠΈΠ»Π°ΠΌΠΈΠ½ΠΎΠΌ, ΠΏΡΠΎΡ
ΠΎΠ΄Ρ ΡΠ΅ΡΠ΅Π· ΠΌΠΈΠ½ΠΈΠΌΡΠΌ ΠΏΡΠΈ Π½Π΅Π²ΡΡΠΎΠΊΠΈΡ
ΡΡΠ΅ΠΏΠ΅Π½ΡΡ
Π½Π΅ΠΉΡΡΠ°Π»ΠΈΠ·Π°ΡΠΈΠΈ. ΠΠΎΠ²ΡΡΠ΅Π½Π½ΠΎΠ΅ Π½Π°Π±ΡΡ
Π°Π½ΠΈΠ΅ ΠΎΠ±ΡΡΡΠ½Π΅Π½ΠΎ Ρ ΠΏΠΎΠΌΠΎΡΡΡ Π½Π΅ΡΠΌΠΏΠΈΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΊΠ²Π°Π½ΡΠΎΠ²ΠΎ-Ρ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ°ΡΡΠ΅ΡΠΎΠ² ΡΡΠΏΡΠ°ΠΌΠΎΠ»Π΅ΠΊΡΠ»ΡΡΠ½ΡΡ
ΡΠΈΡΡΠ΅ΠΌ: ΠΌΠΎΠ»Π΅ΠΊΡΠ»Ρ Π²ΠΎΠ΄Ρ Π² ΡΠ°ΡΡΠΌΠΎΡΡΠ΅Π½Π½ΠΎΠΉ ΡΡΡΡΠΊΡΡΡΠ΅ Π½Π°Ρ
ΠΎΠ΄ΡΡΡΡ ΠΌΠ΅ΠΆΠ΄Ρ ΠΌΠΎΠ»Π΅ΠΊΡΠ»Π°ΠΌΠΈ (ΠΈΠΎΠ½Π°ΠΌΠΈ) Π°ΠΌΠΈΠ½Π° ΠΈ ΡΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΠΌΠΈ Π³ΡΡΠΏΠΏΠ°ΠΌΠΈ, ΠΎΠ±ΡΠ°Π·ΡΡ ΠΏΡΠΎΡΠ»ΠΎΠΉΠΊΡ ΠΌΠ΅ΠΆΠ΄Ρ Π½ΠΈΠΌΠΈ