1 research outputs found
One-Dimensional Model of Heat and Mass Transfer in Closed-Type Cryogenic Gasifiers
Π ΡΠ΅ΡΠΌΠΈΠ½Π°Ρ
ΡΡΠ΅Π΄Π½Π΅ΠΌΠ°ΡΡΠΎΠ²ΠΎΠΉ ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΡ ΡΠ²Π΅ΡΡ
ΠΊΡΠΈΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠ»ΡΠΈΠ΄Π° (Π‘ΠΠ€),
ΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΠ΅ΠΌΠΎΠΉ ΠΏΠΎ ΡΡΠ΅Π΄Π½Π΅ΠΌΠ°ΡΡΠΎΠ²ΠΎΠΉ ΡΠ½ΡΠ°Π»ΡΠΏΠΈΠΈ ΠΏΠΎΡΠΎΠΊΠ°, ΡΡΠΎΡΠΌΡΠ»ΠΈΡΠΎΠ²Π°Π½ΠΎ ΠΎΠ΄Π½ΠΎΠΌΠ΅ΡΠ½ΠΎΠ΅ ΡΡΠ°Π²Π½Π΅Π½ΠΈΠ΅
ΠΏΠ΅ΡΠ΅Π½ΠΎΡΠ° ΡΠ½Π΅ΡΠ³ΠΈΠΈ. ΠΠΈΠ½Π΅ΡΠΈΡΠ΅ΡΠΊΠΎΠ΅ ΡΡΠ°Π²Π½Π΅Π½ΠΈΠ΅ Π΄Π»Ρ ΡΠ΅ΠΏΠ»ΠΎΠ²ΠΎΠ³ΠΎ ΠΏΠΎΡΠΎΠΊΠ° ΡΠ΅ΠΏΠ»ΠΎΠΎΠ±ΠΌΠ΅Π½Π° ΠΌΠ΅ΠΆΠ΄Ρ Π‘ΠΠ€
ΠΈ ΡΠ΅ΠΏΠ»ΠΎΠ½ΠΎΡΠΈΡΠ΅Π»Π΅ΠΌ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΎ Π² ΡΠΎΡΠΌΠ΅ Π·Π°ΠΊΠΎΠ½Π° ΠΡΡΡΠΎΠ½Π°-Π ΠΈΡ
ΠΌΠ°Π½Π°
Π² ΠΏΠΎΡΠΎΠΊΠ°Ρ
ΠΆΠΈΠ΄ΠΊΠΈΡ
ΡΡΠ΅Π΄
ΠΈ ΡΠ΅ΠΏΠ»ΠΎΠ²ΡΡ
ΡΠΎΠΏΡΠΎΡΠΈΠ²Π»Π΅Π½ΠΈΠΉ Π΄Π» Ρ ΠΌ Π½ΠΎΠ³ΠΎΡΠ»ΠΎΠΉΠ½ΠΎΠΉ Ρ ΡΡΠ±ΠΊΠΈ ΡΠ΅ΠΏΠ»ΠΎΠΎΠ±ΠΌΠ΅Π½Π½ΠΈΠΊΠ°, Ρ ΡΠΈΡΡΠ²Π°ΡΡΠ΅ΠΉ
Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡ ΠΎΠ±Π»Π΅Π΄Π΅Π½Π΅Π½ΠΈΡ ΡΡΡΠ±ΠΊΠΈ ΡΠΎ ΡΡΠΎΡΠΎΠ½Ρ ΡΠ΅ΠΏΠ»ΠΎΠ½ΠΎΡΠΈΡΠ΅Π»Ρ. Π’ΠΎΠ»ΡΠΈΠ½Π° ΡΠ»ΠΎΡ ΠΎΠ±Π»Π΅Π΄Π΅Π½Π΅Π½ΠΈΡ
Π½Π°Ρ
ΠΎΠ΄ΠΈΡΡΡ ΡΠ°ΠΌΠΎΡΠΎΠ³Π»Π°ΡΠΎΠ²Π°Π½Π½ΡΠΌ ΠΎΠ±ΡΠ°Π·ΠΎΠΌ ΠΏΡΠΈ ΡΠ΅ΡΠ΅Π½ΠΈΠΈ ΡΡΠ°Π²Π½Π΅Π½ΠΈΠΉ ΠΌΠΎΠ΄Π΅Π»ΠΈ, Π°Π½Π°Π»ΠΎΠ³ΠΈΡΠ½ΠΎ Π·Π°Π΄Π°ΡΠ΅
Π‘ΡΠ΅ΡΠ°Π½Π°. ΠΠ»Ρ ΠΏΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½Π½ΠΎΠΉ ΠΌΠΎΠ΄Π΅Π»ΠΈ, ΠΏΡΠΎΠ°Π½Π°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Ρ ΡΠ΅ΠΏΠ»ΠΎΡΠΈΠ·ΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΡΡΠ»ΠΎΠ²ΠΈΡ ΡΠ΅ΠΏΠ»ΠΎΠΎΠ±ΠΌΠ΅Π½Π°
Π² Π‘ΠΠ€ ΠΈ ΡΠ΅ΠΏΠ»ΠΎΠ½ΠΎΡΠΈΡΠ΅Π»Π΅ ΠΈ Π²ΡΠ±ΡΠ°Π½Ρ ΠΊΡΠΈΡΠ΅ΡΠΈΠ°Π»ΡΠ½ΡΠ΅ ΡΡΠ°Π²Π½Π΅Π½ΠΈΡ Π΄Π»Ρ ΡΠ°ΡΡΠ΅ΡΠ° ΠΊΠΎΡΡΡΠΈΡΠΈΠ΅Π½ΡΠΎΠ²
ΡΠ΅ΠΏΠ»ΠΎΠΎΡΠ΄Π°ΡΠΈ Π² ΡΠ΅ΠΏΠ»ΠΎΠ½ΠΎΡΠΈΡΠ΅Π»Π΅ ΠΈ ΠΎΠΊΡΡΠΆΠ°ΡΡΠ΅ΠΉ ΡΡΠ΅Π΄Π΅. ΠΡΠΎΠ²Π΅Π΄Π΅Π½Π° Π°ΠΏΡΠΎΠ±Π°ΡΠΈΡ ΠΌΠΎΠ΄Π΅Π»ΠΈ Π² ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
ΡΡ
Π΅ΠΌΠ°Ρ
ΡΠ΅ΠΏΠ»ΠΎΠΎΠ±ΠΌΠ΅Π½Π°A one-dimensional energy transfer equation is formulated in terms of the average mass temperature of a supercritical fluid (SCF), determined by the average mass enthalpy of the flow. The kinetic equation for the heat flow of heat exchange between the SCF and the coolant is used in the form of the Newton-Richman law in the flows of liquid media and thermal resistances for a multilayer heat exchanger tube, taking into account the possibility of icing of the tube from the coolant side. The thickness of the icing layer is found in a self-consistent way when solving the model equations, similar to the Stefan problem. For the proposed model, the thermophysical conditions of heat exchange in the SCF and the coolant are analyzed and the criteria equations for calculating the heat transfer coefficients in the coolant and the environment are selected. The model was tested in various heat exchange scheme