Heat Transfer (2)

H930 Steam to Water Heat Exchanger
The unit is self contained and designed for bench top use having it own steam generator and condenser tubes housed in a thick walled glass cylinder.

The tubes may be connected in a single, double or four pass configuration and full instrumentation is provided for the investigation of the thermal performance in each configuration.

A differential pressure manometer also allows the pressure drop due to velocity to be investigated in each configuration.


	Data sheet


	Data sheet


	H952 Concentric Tube Heat Exchanger The unit enables students to study the detailed performance of concentric tube heat exchangers of the type most commonly used in industry. The unit includes all the necessary temperature and flow measurements and is suitable for both basic and advance studies. The metal and two fluid stream temperature are measured at inlet and outlet allowing the relationship Nu = k ReaPrb to be developed by evaluating k, a and b. The heat exchanger may be connected to give either con-current or counter-current flow and the two additional pairs of intermediate stream temperatures allow classic heat exchanger temperature profiles to be plotted. By varying the water velocity and temperature Reynolds Numbers of 4000 to 70000 and Prandtl Numbers of 2.5 to 5 can be achieved.


	The unit has a digital PID hot water temperature control for ease of use and a computerised data acquisition upgrade is also available that may be added at any time. The Windows software is menu driven and allows data files to be exported to Excel or other spread sheet formats for evaluation and presentation.

H971 Laminar/Viscous Flow Heat Transfer Unit
This self-contained unit has been developed to study concentric tube heat exchangers where the flow is laminar. It is therefore particularly suited to those courses such as process engineering and food technology where laminar rather than turbulent flow often occurs.

Students need to be aware that the heat transfer is reduced in laminar flow and to design systems accordingly.

The heat exchanger can be connected to provide either con-current or counter-current operation and is instrumented with the metal, two fluid stream inlet and outlet temperatures and fluid flow rates. This allows calculation of the relationship between the Nusselt and Graetz Numbers.


	The unit has a digital PID oil temperature control for ease of use and a computerised data acquisition upgrade is also available either factory fitted or installed as a user upgrade. The Windows software is menu driven and allows data files to be exported to Excel or other spread sheet formats for evaluation and presentation.


	Data sheet


	Data sheet


	H981 Temperature measurement Methods and Calibration Unit. The measurement of temperature is fundamental to almost every branch of engineering and science. This unit enables students to investigate the many different methods of measuring temperature and to determine the advantages and disadvantages of the various sensor and indicator types. Up to nine different methods of temperature measurement are included and students undertake detailed experiments to compare not only accuracy but also the way in which the instruments work. The operation of platinum resistance temperature sensors and their importance in the International Temperature Scale (ITS-90) are investigated in detail. Optional computerized data acquisition and traceable calibration standards are also available and add to the extreme versatility of this unit.

H101 Heat Exchanger Service Unit
This bench top unit enables students to study in qualitative and basic numeric terms the most common types of heat exchanger found in industry. Illustrated with the optional Shell and Tube Heat Exchanger installed, other optional heat exchangers are available that may be fitted to the service unit.
These include:

Concentric Tube Heat Exchanger (H101A)
Plate Heat Exchanger (H101B)
Shell and Tube Heat Exchanger (H101C)
Jacketed Vessel with Coil and Stirrer (H101D).
Extended Concentric Tube Heat Exchanger (H101E)
Extended Plate Heat Exchanger (H101F)

All heat exchangers have clear plastic exteriors allowing visual examination of the construction. An integral heater and circulator provide a controlled temperature hot water source for testing the performance of each heat exchanger. Instrumentation allows measurement of all relevant temperatures and the flow rate of the hot and cold streams.

A computer upgrade (HC101) is available using the Hilton Data Logger System and menu driven Windows software with tabulated, graphical and annotated schematic displays In addition the Data Logger System may be detached and used for other applications in the laboratory.


	Data sheet


	Data sheet

H111 Heat Transfer Service Unit
This service unit together with the optional demonstration units allows students to study various aspects of Conduction, Convection and Radiation both numerically and visually. The optional demonstration units available include:

• Linear Heat Conduction (H111A)
• Radial Heat Conduction (H111B)
• Laws of Radiant Heat Transfer & Radiant Heat Exchange (H111C)
• Combined Convection and Radiation (H111D)
• Extended Surface Heat Transfer (H111E)
• Radiation Errors in Temperature Measurement (H111F)
• Unsteady State Heat Transfer (H111G)


	The service unit provides safe adjustable power to drive various aspects of each optional demonstration unit as well as multi point digital temperature indication and digital display of all relevant parameters. These include Volts, Amps, Radiation, Light Intensity,Velocity and Flow. A computer upgrade (HC111) is available using the Hilton Data Logger System and menu driven Windows software with tabulated, graphical and annotated schematic displays In addition the Data Logger System may be detached and used for other applications in the laboratory.

H050 Boyles Law Demonstrator
The demonstration of Boyle’s Law
(pV = Constant) is one of the fundamental experiments for student chemists, physicists and engineers of all disciplines.

The H050 bench top unit is completely self-contained incorporating a combined compressor and vacuum pump, allowing investigation both above and below atmospheric pressure.

Instrumentation includes gas pressure, volume and temperature allowing the investigation of the characteristic gas equation pV=mRT by more advanced students.

For operator safety the unit includes a high pressure cut out, relief valves, residual current circuit breaker and overload cut out.


	Data sheet


	Data sheet

H060 Laboratory Cooling Plant With Ice Store
A bench top unit, that when combined with the Hilton Air and Water Heat Pump R832 and Bench Top Cooling Tower H892 allows investigation of both flow and batch heating and cooling processes, the vapour compression refrigeration cycle and evaporative or dry cooling.

The Hilton Air and Water Heat Pump R832 and Bench Top Cooling Tower H892 are connected to the H060 unit using push fit couplings and are easily disconnected for operation to their full specification in isolation.

Optional computerised data acquisition is available for all three units enabling students to investigate both steady state and transient response of the isolated or combined apparatus.

H813 Dew Point Hygrometer
A complete self contained dew point hygrometer that allows rapid and repeated measurement of the dew point of air using the classic chilled mirror method.

A small air sampling pump draws air from either the laboratory or a remote location through the sensing chamber. The temperature at which water vapour condenses on the mirror is recorded together with the ambient dry bulb temperature using the thermometers supplied. Together, the measurements allows students to determine the condition of the sampled air either by calculation or using the psychrometric chart supplied.

The unit is complimentary to the Hilton Air Conditioning Laboratory Unit A660 and the Bench Top Cooling Tower H892.


	Data sheet




	H892 Bench top cooling tower shown with column H890E


	H892 Bench Top Cooling Tower Reproduces all the processes that are found in an industrial system serviced by a forced draught cooling tower. The unit incorporates a process load, circulating pump, packed column, water distribution, volume control system and fan. Standard instrumentation allows measurement of the air, circulating water mass flow rate and all end state temperatures using wet and dry bulb thermocouples. Evaporation rates under varying load and flow conditions can also be investigated. The computer-linked version includes transducers and software to measure the same parameters and to plot psychrometric and other graphical data in real time. The unit is supplied complete with one column of packing density 110m2/m3. Columns with different packing densities together with a column enabling the construction of driving force diagrams and an empty column for student project work are available as optional items.


	Data sheet