Recycle Loops
- A benchtop unit comprising 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
Exercises.
Key Features:
- 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)
Description:
A benchtop unit designed to introduce
students to the characteristics of a recycle loop and the typical
responses under steady state and unsteady state conditions. The
apparatus consists of a through pipe conveying water from a cold water
supply to a suitable drain with a loop of pipework connected between the
supply and drain connections. This recycle loop incorporates a
circulating pump and a heater to raise the temperature of the water in
the loop. The heater can be switched on or off to generate step changes
when investigating the transient responses of the recycle loop. A pair
of self-sealing fittings allows a short length of pipe or a reservoir to
be connected in series with the recycle loop to change the volume of
the loop and demonstrate the effect of residence time. The arrangement
also allows different lengths of flexible tubing to be connected in
series with the loop if it is required to create further changes in
residence time. Water temperatures at the inlet, outlet and within the
recycle loop are measured using type K thermocouples. Water flowrates at
the corresponding locations are measured using miniature turbine type
flow sensors. Flow sensors are included at the outlet as well as the
inlet to show that these two flow rates are always equal (a simple
principle that is often confusing when water is flowing through the
recycle loop).
Recycle Loops ALTEC Laboratory Equipments and ALTEC Laboratory Instruments Tenders.