Recycle Loops is a benchtop unit having
a vacuum formed ABS plastic plinth with integral electrical console on
to which is mounted a through pipe with a recycle loop which
incorporates a circulating pump and heater.
A pressure regulator with filter at the
inlet to the apparatus minimises the effect of fluctuations in the cold
water supply pressure. Water in the recycle loop is heated by a 2 kW
electric heater with over-temperature protection. Flow in the loop can
be varied from 0 (no recycle) to 3 litres/ min. The through flow of
water can be varied from 0 to 1.5 litres/min.
Temperatures at the entry to the
system, at the exit from the system and inside the recycle loop are
measured using type K thermo couples. Flow rates at corresponding
locations are measured using turbine type flow sensors. A reservoir with
self-sealing fittings allows the volume of the loop to be changed.
All electrical circuits are protected by appropriate protection devices.
The console incorporates a digital
meter with selector switch, which displays the temperatures and flow
rates measured. Corresponding signals are routed to an I/O port for
connection to a PC.
An optional interface device and
educational software package is available. A comprehensive instruction
manual is included with a range of fully detailed Laboratory Teaching
The small-scale of the loop ensures that responses can be fully evaluated in a normal laboratory session
Water is used as the working fluid for safety and ease of use
All electrical sensors can be logged using a PC (optional teaching software available)