Heat Transfer

A thorough understanding of the basic modes of Heat Transfer is a fundamental requirement for most courses in Science and Engineering. We have long been recognised as the leading manufacturer of teaching equipment in this field. Our current range covers both fundamental principles as well as units for more advanced studies.

Our unique expertise has produced a range of equipment that enables students to see many of the physical processes involved in Heat Transfer while at the same time making accurate and meaningful experiments related to these processes.

Designed to teach all the fundamental principles of heat transfer, our units are applicable to the broadest range of courses ensuring high utilisation and excellent value for money.


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	H351Cross Flow Heat Exchanger Cross Flow Heat Exchangers are one of the most common types of heat exchanger used in countless applications such as engine radiators, air heaters, refrigeration evaporators and condensers, super-heaters and economisers. The unit is designed to enable students to investigate steady state rates of free and forced convective heat transfer at various air velocities and is supplied complete with a separate instrumentation console and a variable speed fan as standard. A single plain tube plate, six row plain tube bundle, four row finned tube plate, local heat transfer cylinder and mounting plate are available as individual optional extras for detailed investigation. In addition a flat plate, pinned plate and finned plate are available as well as a heat pipe evaluation plate for entry level students. A computer upgrade covering all optional cross flow heat exchanger modules can be supplied together with menu driven Windows software for computerised data acquisition. The upgrade may be user or factory fitted. Data files are easily exported to Excel or other spread sheet formats for evaluation and presentation.

H411 Flow Boiling Demonstration Unit
This floor-mounted unit has been designed to provide a visual demonstration of the flow boiling processes that can occur inside the vapour generating tubes of practical plant such as refrigeration, steam, chemical and food processing systems.

A real (not simulated) boiling process is used and all the stages of evaporation from warming of sub-cooled liquid to nucleation, bubble flow, slugging, annular flow, droplet entrainment and finally superheated vapour can be observed and demonstrated. The unit operates under steady state conditions allowing the processes to be studied for prolonged periods of time.


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	Data sheet


	H471 Thermal Conductivity of Liquids and Gases Unit A compact unit designed for the direct measurement of the thermal conductivity of a wide range of liquid and gases. This is an aspect of heat transfer studies that is often overlooked but of crucial importance in the prediction of heat exchanger performance. The simple calibration procedure enables the effect of incidental heat transfer to be determined and the unit is supplied complete with a console for the control and display of temperatures and heat input. The unit is complementary to the Thermal Conductivity of Building and Insulating Materials Unit. An optional computerised data acquisition package with menu driven Windows software is available for installation at any time. Data files are easily exported to Excel or other spread sheet formats for evaluation and presentation.

H655 Boiling Heat Transfer Unit
Boiling is the one of most important processes in the transfer of heat and is used in many industrial applications. For example, power generation, refrigeration, refining and nuclear engineering all depend upon an effective boiling process.

Students need to be aware of the modes of pool boiling and to make both qualitative and quantitative assessments of convective, nucleate and film boiling.

The unique design allows the student to see the processes taking place inside a glass cylinder and measure temperatures and heat flux under steady state conditions. The unit responds very rapidly to a load change and a wide range of conditions can be investigated in a typical laboratory period. A computer upgrade Packages with Windows based software is available which displays an annotated schematic diagram and graphical representation of the heat flux against temperature difference and critical heat flux against pressure.


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H693 Fluidisation and Fluid Bed Heat Transfer Unit
Application of fluidised beds is more widespread in industry than is usually appreciated, covering such diverse fields as power generation to food processing. The objective of the unit is to investigate the gas flow through a fixed and fluidised bed and to measure the heat transfer rate and coefficients for comparison with convective heat transfer rates in air.

Fluidisation takes place within a transparent chamber and the range of bed material supplied can be rapidly changed. Alternative locally sourced bed materials and air distributors can be easily utilised for student project work.


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H910 Film and Dropwise Condensation Unit
Although the differences in the modes of boiling heat transfer are generally recognised many students are not aware that two distinct modes of condensation can occur. This self-contained bench top unit allows the investigation of heat fluxes and heat transfer coefficients during the condensation of steam.

The considerable difference between the appearance and heat transfer rates of dropwise and filmwise condensation is clearly demonstrated and heat fluxes approaching 1000 kW/m2 can be obtained.

A vacuum pump is fitted to the unit so that the effect of non-condensable gases in condensers may be investigated. A computer upgrade allowing all temperatures, pressures and flow rates to be automatically recorded is available.


	Data sheet