CONDENSATION IN DROP AND FILM FORMS
To study heat transfer coefficients in dropwise & filmwise
condensation, glass cylinder at the top of which two condensers
hang and steam inlet at bottom, water is circulated through the
condensers from common inlet.Transparent glass cylinder allows
visualization of condensation process. Rotameter for water flow,
Pressure gauge for steam pressure, temp. indicator for
TWO PHASE HEAT TRANSFER APPARATUS
To study visualization of two phase of liquid viz. boiling & condensation.
Liquid R-11 in which a hot cylinder is immersed. Boiling of liquid,
observed over heater surface upto nucleate boiling phase. Condenser
coil at the top of cylinder. Vapor is condensed to liquid.
Measurements- pressure of vapor-pressure gauge,
water flow-Rotameter, Control of heater surface temp.-Dimmer &
CRITICAL HEAT FLUX APPARATUS
To study of boiling heat transfer. A nichrome wire immersed in water
and heated by passing current through it. input to nichrome wire,
controlled by dimmer stat. Increasing wire input current increases &
at critical heat flux the wire brakes. It is measured on meter.
Magnifying glass and lamp to visualise natural connection and
pool boiling and separate heater coil in water allows for various
HEAT EXCHANGER SECTION
Concentric Tube Heat Exchanger
CONCENTRIC TUBE HEAT EXCHANGER ( plain tube type )
To determination of heat transfer rate, LMTD, heat transfer coefficient
and effectiveness of heat exchanger. Unit consists of a copper tube
inside a G I pipe, hot water from geyser flows through the inner tube
and cold water flows through outer tubes. Hot water flows in one
direction, cold water can be changed parallel or counter. temperature
and flow rate of water measured.
CONCENTRIC TUBE HEAT EXCHANGER (finned tube type)
To determination of heat exchanger, heat transfer coefficient, LMTD
and effectiveness of the exchanger. Unit consists of a G I pipe, copper
pipe with longitudinal fins over the periphery is fitted inside. Hot fluid is
water obtained from geyser. Flows through the copper pipe.
Cold fluid is air. flows over the fins. Direction of hot water is fixed,
direction of air can be changed. Various measurement are provided.
CONCENTRIC TUBE HEAT EXCHANGER(plain & finned tube comparator type )
To compare the performance of finned tube with plain tube heat
exchanger. two heat exchangers operating Operating in parallel
and are concentric tube type. Inner tube carries hot fluid and cold
luid flows outside. Hot fluid is water and obtained from heaters.
Cold fluid is air supplied by blower to both exchangers. one exchanger
with plain inner tube & other with finned tube.
CROSS FLOW HEAT EXCHANGER ( air to air type )
To determine LMTD , heat transfer rate and effectiveness of heat
exchanger.cross flow heat exchanger is air to air type.air flow supplied
by blower. Hot air obtained passing air over a bank of finned tubes. Hot air flows through a tubes while cold air flows over the tubes at
right angle to hot air.