Description
The Computer Controlled Water Cooling Tower has been designed to give students an appreciation of the construction, design and operational characteristics of a modern evaporative cooling system. The unit is also an excellent example of a specialised heat exchanger, where two streams of fluid flow (water and air) are brought into direct contact and in which there is a mass transfer from one phase to the other.
The comprises a cooling tower mounted on top of a heated water reservoir. The cooling tower is manufactured from clear acrylic for visibility, and has an easily removable front face to allow different packing materials to be inserted.
Features:
Measurements, computer control and data logging via USB port as standard
Closed loop PID control of water temperature at entry to the tower for more versatile operation and more accurate results
Four interchangeable sections of tower packing material supplied
Two densities of packing material included for comparison
Three different heights of packing can be compared
User supplied material can easily be fitted into the tower for project work
Uses true industrial packing material for more representative demonstrations
Improved distribution of water onto the packing using an array of spray nozzles
Electronic (software) control of water recirculation, air flow and heater power
Electronic sensors measure flow of air and water, temperature of air and water and humidity entering and leaving the packing
Modern electronic humidity sensors utilized, eliminating the need for high maintenance wet and dry bulb thermometers
Water loss due to evaporation measured electronically
Can be operated as a simple spray tower with no packing installed
Specification:
Bench top unit to demonstrate operation of a forced draught cooling tower
Computer controlled, supplied with Windows software
Clear acrylic tower for visibility, dimensions 700 mm x 150 mm x 150 mm
Removable front panel on the tower, allowing different packing materials to be tested
Supplied with four blocks of industrial packing material giving two different packing densities and three different packing heights
Full height of packing 500 mm
Water reservoir with 1.75 kW (nominal) electrical heater
Closed loop PID control of water temperature or constant power operation of the heater, variable from 0 to 1.75 kW (nominal)
Software controlled variable speed water pump adjustable from 0 to 2.4 l/min
Software controlled variable speed air blower adjustable from 0 to 65 g/s
Electronic instrumentation includes flow of air and water, temperature of air and water and RH of air entering and leaving the packing
