H893 Bench Top Cooling Tower

H893 Bench Top Cooling Tower

Reproduces all the processes that are found in an industrial system serviced by a forced draught cooling tower.
The unit incorporates a process load, circulating pump, packed column, water distribution, volume control system and fan.

Standard instrumentation allows measurement of the air, circulating water mass flow rate and all end state temperatures using wet and dry bulb thermocouples. Evaporation rates under varying load and flow conditions can also be investigated.

The computer-linked version (HC893A) includes transducers and software to measure the same parameters and to plot psychrometric and other graphical data in real time.

The unit is supplied complete with one column of packing density 110m2/m3. Columns with different packing densities together with a column enabling the construction of driving force diagrams and an empty column for student project work are available as optional items.

H893 Bench Top Cooling Tower

Basic unit: Constructed in Impact Resistant Plastic and housing load tank with 0.5 and 1.0 kW heaters and float level control, make-up tank, bronze circulating pump, air fan, electrical control panel with digital temperature indicator.

Packed Column ‘B’: Constructed in transparent P.V.C. with eight decks of inclined laminated plastic packing, water distribution troughs and pressure tappings. Packing density 110m2 per m3.

Cap: Transparent P.V.C. fitted with 80mm dia. Sharp edged orifice, droplet arrester and water distributor.

Digital Temperature indicator with channel selector switch for all wet bulb, dry bulb and water temperatures. Variable area water flowmeter and manometer for airflow.

Additional Columns

Column A:  As column B but with a packing density of 77m2 per m3

Column C: As column B but with a packing density of 200m2 per m3

Column D: Empty Column

Column E: (Packing Characteristics Column). Similar to column C but with packing arranged to allow measurement of air and water properties within column. Fitted with thermocouple sensors, selector switch and digital thermometer.

  • Observation of water flow pattern and distribution.
  • Measurement of all “end states”, and rates of flow of water, air and make-up.
  • Plotting of end states on a psychrometric chart and the application of the steady flow equation to draw up energy balances.
  • Investigation of performance at,

(a) A range of process cooling loads.

(b) A range of inlet temperatures.


A: 1.6 kW. 220-240 Volts, Single Phase 50Hz (With earth/ground).


B:   1.6 kW.110-120 Volts, Single Phase, 60Hz (With earth/ground).


Demineralised or distilled Approx. 2 kg / hour