DEPARTMENT OF CHEMICAL ENGINEERING
UNIVERSITY OF ENGINEERING AND
TECHNOLOGY PESHAWAR PAKISTAN
SIMULTANEOUS HEAT AND
MASS TRANSFER LABORATORY
LAB ENGINEER:
Engr Unsia Habib
LAB TECHNOLOGIST:
Mr Tajamal
LAB ASSISTANT:
Mr Safeer Simultaneous Heat and Mass Transfer Simultaneous Heat and Mass transfer Laboratory (CHE 412L) The Simultaneous heat and mass transfer Laboratory houses several equipment for
educational and research applications. There are driers, Evaporators and cooling tower
in the laboratory. The students gain valuable insight into the subject of simultaneous
heat and mass transfer while experimenting with such units.
Equipments in Simultaneous Mass Transfer Laboratory
S. No
Name of Equipment
Model Number
Quantity
1
Bench top Cooling tower
P.A Hilton HC891A
1
2
Spray drier
Armfield FT 30
1
3
Tray drier
Armfield UOP 8
1
4
Modular Evaporator series with
Armfield UOP 20 –X-
1
laboratory steam generator
STM
2 Department of Chemical Engineering U.E.T Peshawar Simultaneous Heat and Mass Transfer Equipments Description
1. Bench top Cooling tower
This is a small scale cooling tower that reproduces all the processes found in an
industrial cooling tower. The unit incorporates a process cooling load, circulating pump,
packed column, water distribution system and a forced draught fan.
Figure 1 Bench top Cooling tower
3 Department of Chemical Engineering U.E.T Peshawar Simultaneous Heat and Mass Transfer 2. Spray drier
A bench top all glass construction unitsallow continues observation and measurement
of rapid drying process. In the process of Spray Drying, the liquid stream or feed is first
atomized using a suitable Atomizer and is then sprayed at a high speed over hot gases
present in the apparatus. Next the hot gases dry up the stream, which is then taken into
a Cyclone for separation of the particles produced.
Figure 2: Spray drier
4 Department of Chemical Engineering U.E.T Peshawar Simultaneous Heat and Mass Transfer 3. Tray drier
The small scale tray drier dries solids by passing a stream of hot air over trays of wet
material, a method commonly used in industry. It is also applicable to food technology
education e.g., to design a fruit snack, similar to a fruit roll-up, using a fresh and in
research e.g., to determine
product specifications, such as thickness and water
content, as well as process and drier specifications.
Figure 3: Tray drier
5 Department of Chemical Engineering U.E.T Peshawar Simultaneous Heat and Mass Transfer 4. Modular Evaporator series with laboratory steam generator
The service unit is capable of housing one or two columns with rising or falling film
evaporation and controlled recirculation in either direction. High column capability allows
low temperature evaporation.
Figure 4: Modular Evaporator series with laboratory steam generator
6 Department of Chemical Engineering U.E.T Peshawar Simultaneous Heat and Mass Transfer List of Experiments
S.No
Name of Experiments
1.
Demonstration of forced draft cooling tower and determination of
properties for atmospheric air by using hygrometer and psycho meter.
2.
Energy and mass balance across a forced draft cooling tower
3.
To find the effect of cooling load on wet bulb approach and cooling range.
4.
To find the effect of air velocity on wet bulb approach and Packing
pressure drop.
5.
Investigation of the effect of packing density on the performance of the
cooling tower.
6.
To investigate the drying rate for a wet solid being dried with air of fixed
humidity and temperature.
7.
To demonstrate the spray drier
8.
To investigate the influence of air velocity on the drying rate of wet solid in
air of fixed temperature and humidity.
9.
To investigate the influence of particulate size on the drying behavior of a
wet solid in air of fixed temperature and humidity.
10.
To investigate the influence of air temperature on the drying rate of a wet
solid in air at fixed velocity
7 Department of Chemical Engineering U.E.T Peshawar