Heat exchanger is devices
in which heat is transferred from one fluid to another. The apparatus
consists of a concentric
tube heat exchanger. Hot water flows through inner tube in one direction only
and cold water flows over the inner tube in outer tube. Direction of cold fluid
flow can be changed from parallel or counter to hot water so that unit can be operated
as parallel or counter flow heat exchanger. Flow rates of hot and cold water
are measured using Rotameter. A magnetic drive pump is used to circulate the
hot water from a re-cycled type water tank, which is fitted with heaters and
Digital Temperature Controller.
EXPERIMENTS:
ØTo calculate the following parameters both for parallel and
counter flow arrangement.
ØTo find the rate of heat transfer
ØTo calculate the LMTD
ØOverall heat transfer co-efficient.
ØTo compare the performance of Parallel and Counter flow heat
exchanger
UTILITIES REQUIRED:
ØWater supply 10 lit/min (approx.) and drain
ØElectricity Supply: 1Phase, 220 V AC, 3 kW
ØFloor area 2 m x 0.6m
TECHNICAL DETAILS:
Product Name
Parallel Counter Flow Heat Exchanger Apparatus
System
Water to Water
Length of Heat Exchanger
1.6 m(approx.)
Outer Tube
Material Stainless steel, ID 27.5mm, OD 33.8 mm (approx).
Inner Tube
OD 12.7mm (approx)
Water Flow Measurement
Measuring cylinder & Stop Watch with Rotameter (2Nos.)
one each for cold & hot fluid
Hot Water Tank
Made of Stainless steel Insulated with ceramic fiber wool.
Hot Water Circulation
Magnetic Pump made of Polypropylene to circulate Hot Water.
Maximum working temperature is 85°C.
Heaters
Nichrome wire heater (2 Nos.)
Temperature Sensors
RTD PT-100 type 6 Nos.
Control panel
Digital Temperature Controller: 0-199.9°C (For Hot Water
Tank),
Digital Temperature Indicator: 0-199.9°C,with
multi-channel switch,
On/Off switch, Mains Indicator etc
A good quality painted rigid MS Structure is provided to
support all the parts
Thermal Conductivity of Liquids Apparatus
The present apparatus is
designed to determine thermal conductivities of different liquids.
The apparatus consists of
a heater. The heater heats a thin layer of liquid. A cooling plate
removes heat through
liquid layer, ensuring unidirectional heat flow. Temperature is measured across
the liquid layer and complete assembly is properly insulated. A proper
arrangement for changing the liquids is provided. The whole assembly is kept in
chamber.
EXPERIMENTS:
ØDetermination of Thermal conductivity of different liquids
and to make a comparative study
ØStudy of variation of thermal conductivity of different
liquids with temperature
UTILITIES REQUIRED:
Ø
ØWater supply 5 lit/min (approx.)
ØDrain. .
ØElectricity Supply: 1Phase, 220 V AC, 2 Amps.
TECHNICAL DETAILS:
Product Name
Thermal
Conductivity of Liquids) Apparatus
Liquid Chamber Dia
170 mm (approx) Height :
22 mm (approx)
Heater
Dia 100 mm, sandwiched between copper plates
Insulation
Ceramic Wool
Cooling chamber
Made of Aluminum for water circulation
Temperature Sensors
RTD PT100 type (6 Nos.)
Control panel
Digital Voltmeter: 0300 Volt,
Digital Ammeter: 02
Amp,
Variac: 0230 V, 2 A,
Digital Temperature
Indicator: 0199.9°C, with multichannel switch,
On/Off switch, Mains Indicator etc.
Valves are provided
for drain, charging& overflow line to make system flexible.
MS Cabinet to
accommodate the slab assembly
The whole set up is
mounted on a powder coated base plate
Cross Flow Heat Exchanger Apparatus
The cross flow heat
exchanger is air-to-air type heat exchanger. On both hot and cold
sides, air flow is
generated by centrifugal blowers. Hot air is obtained by passing air over a
bank of finned tubes. The air then flows to heat exchanger section i. e. a bank
of finned tubes. Hot air flows through tubes while cold air flows over the
tubes at right angle to hot air. The experiments can be conducted over various
air flow rates and air temperatures to determine LMTD, heat transfer rates and
effectiveness of heat exchanger.
EXPERIMENTS:
ØTo determine the water side overall heat transfer coefficient
on a cross-flow heat exchanger
UTILITIES REQUIRED:
ØElectricity Supply: 1Phase, 220 V AC, 3 kW
ØFloor area 3 m x 2m
TECHNICAL DETAILS:
Product Name
Cross Flow Heat
Exchanger Apparatus
Heat Exchanger
Finned tubes. 17mm. I.
D., 20mm. O. D., 0.5mtr. long tube with 50mm. O. D. fins -
25 Nos.
Centrifugal blower
on hot and cold sides
Finned air heaters
1 Kw each 3nos.
Air flow control
arrangement at blower suction.
Multichannel
Digital temperature indicator to measure temperature of air at inlet and outlet
of heat exchanger.
Thermal Conductivity of Insulating Slab (By Guarded Hot Plate Method) Apparatus
The setup is designed to
determine thermal conductivities of insulating materials in the form
of slabs. The apparatus
consists of main central heater and ring guard heater, sandwiched between the
specimens. Cooling plates are provided on the either side of the specimen. Two
identical specimens are clamped between heater ensures unidirectional heat flow
through specimen. The whole assembly is kept in chamber and insulated by ceramic
wool insulation around the setup.
EXPERIMENTS:
ØDetermination of Thermal conductivity of insulating Material
in the form of slab Study of variation of thermal conductivity of the material
with temperature
UTLITIES REQUIRED:
ØWater supply 5 lit/min (approx.)
ØDrain.
ØElectricity Supply: I Phase, 220 V AC, 2 Amps.
TECHNICAL DETAILS:
Product Name
Thermal
Conductivity of Insulating Slab (By Guarded Hot Plate Method) Apparatus
Specimen Dia
180 mm (approx)
Thickness: 12 mm (approx).
Central Heater
Dia 100 mm sandwiched between copper plates.
Ring Guard Heater
Width 35 mm sandwiched
between copper rings.
Cooling chamber
Made of Aluminum for water circulation. 2 Nos.
Insulation
Ceramic wool
Temperature Sensors
RTD PT100 type (6 Nos.)
Control Panel:
Digital Voltmeter: 0300
Volt.
Digital Ammeter: 02 Amp,
Variac: 0230 V, 2 A, (2
Nos.) One each for central & ring guard heater,
Digital Temperature Indicator: 0199.90C, with multichannel
switch,
On off switch, Mains
Indicator etc.
MS Cabinet to
accommodate the slab assembly.
The whole setup is
mounted on a powder coated base plate
Heat Transfer in Two Phase Apparatus
It provides visualization
of two phases of liquid viz. boiling and condensation. The liquid is
R-11 in which a hot
cylinder is immersed. The boiling of liquid can be observed over heater
surface up to nucleate
boiling phase. Condenser coil is provided at the top of the cylinder, over
which the vapor is condensed to liquid. A pressure of the vapor and water flow
in condenser is measured by a pressure gauge & Rotameter. Dimmer stat
provides control of heater surface temperature and thermometer notes liquid
temperature, inside glass cylinder.
EXPERIMENTS:
ØTo study the two phases heat transfer unit
UTILITIES REQUIRED:
ØElectricity Supply: 1Phase, 220 V AC, 3 kW
ØFloor area 2 m x 1m
TECHNICAL DETAILS:
Product Name
Heat Transfer in
Two Phase Apparatus
Dimmer
0-230v, 2 Amps. Capacity
for heater control.
Thermometer
To measure liquid R-11 temperature.
Borosilicate glass
cylinder containing R-11 liquid, with heater immersed in liquid
and condenser coil at the top.
A Rotameter for
water flow measurement.
Multichannel
digital Temperature Indicator.
Pressure gauge for
vapor pressure.
Pressure switch to
switch off the heater at set pressure.
Valve to control
water flow rate.
Voltmeter and
Ammeter for heater input measurement.
Parallel Counter Flow Heat Exchanger Apparatus
