Armfield's Engineering Education portfolio

HEAT TRANSFER – HT Series

Heat Transfer Teaching Equipment - HT10X

This range enhances the performance of previous models with computer linking and greater capability.

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Accessories – HT10X

HT10X Heat Transfer Accessories

* Linear heat conduction - HT11
* Radial heat conduction - HT12
* Laws of radiant heat transfer and radiant heat exchange - HT13
* Combined convection and radiation - HT14
* Extended surface heat transfer - HT15
* Radiation errors in temperature measurement - HT16
* Unsteady state transfer - HT17

Heat Transfer Teaching Equipment - HT10XC

A specific feature of the HT10XC is that it incorporates the facilities and safety features to allow the accessories to be remotely controlled from an external computer, where this is appropriate. With suitable (user provided) software, this means that the equipment can be operated remotely, for instance over an intra-net or even over the internet. All the facilities can also be accessed locally using the front panel controls and display.

The Armfield HT10XC is a service unit, which can be used in conjunction with a range of small scale accessories for a wide range of demonstrations into the modes of heat transfer. The factors that affect heat transfer can be investigated and some of the practical problems associated with the transfer of heat can be clearly demonstrated.

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Accessories – HT10XC

The following heat transfer accessories are available for use under manual control:

* HT11: Linear heat conduction
* HT12: Radial heat conduction
* HT13: Laws of radiant heat transfer and radiant heat exchange
* HT14: Combined convection and radiation
* HT15: Extended surface heat transfer
* HT16: Radiation errors in temperature measurement
* HT17: Unsteady state heat transfer

In addition the following accessories can be used in computer control and remote control applications:

* HT11C: Computer controlled linear heat conduction
* HT12C: Computer controlled radial heat conduction
* HT14C: Computer controlled combined convection and radiation
* HT15: Extended surface heat transfer
* HT16C: Computer controlled radiation errors in temperature measurement

Thermo-electric Heat Pump- HT18C

Based on a Peltier device, the Armfield HT18C Thermo-electric Heat Pump demonstrates how electrical power can be used to extract heat from a cool surface and transfer it to a hot surface. This effect is becoming widely used for point cooling (e.g. of semiconductor devices) and small scale volumetric cooling. The HT18C is designed for use with the Armfield HT10XC Heat Transfer Teaching Equipment.

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Computer Controlled Heat Exchanger Service Module - HT30XC

A range of small scale computer controlled heat exchangers, designed to illustrate the principles and techniques of indirect heat transfer between fluid streams.

Different types of heat exchanger can be mounted on a common bench-top service unit. Small scale versions of commonly used industrial heat exchangers are available (including plate, tubular and 'shell and tube') for analysis and comparison.

The equipment is controlled by a user supplied personal computer, which serves as the operator interface. Full data logging (via a USB interface) control and educational software is supplied with the equipment.

In addition, the equipment has been fitted with failsafe systems, including a watchdog circuit, which allows for safe operation from a remote computer.

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Accessories – HT30XC

The heat exchangers available for the HT30XC are:

* HT31 Tubular Heat Exchanger
* HT36 Extended Tubular Heat Exchanger
* HT32 Plate Heat Exchanger
* HT37 Extended Plate Heat Exchanger
* HT33 Shell and Tube Heat Exchanger
* HT34 Jacketed Vessel with coil and stirrer

Armfield Software

Armfield equipment can usually be connected to a PC running Windows via an interface device. The software is designed to run exclusively on Armfield machines and is aimed at allowing students and teachers to get the maximum benefit from time spent in the laboratory.

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