Plate Heat Exchanger

Product Code : SLE/EA/15
  • This heat exchanger is a set of metal plates separated by spacers (gaskets). 
  • The metal plates have flow disturbers on their sides to help improve the heat transfer. 
  • Plate heat exchangers are compact and therefore good for applications with limited space. 
  • It is also easy to alter their design to change their capacity simply add or remove plates and spacers.
  • The plates and gaskets have holes that make the hot and cold flow run on alternate sides of the plates, therefore transferring heat.  

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Concentric Tube Heat Exchanger

Product Code : SLE/EA/16
  • This is the simplest of the optional heat exchangers. 
  • It has two tubes, one inside the other. 
  • Heat exchanger is in two equal parts joined by intermediate pipes. 
  • This allows two extra measurement points at the midpoint. 
  • One tube carries hot fluid, the other carries cold fluid. Heat transfers between them. 
  • This gives more useful experiment results, to show more clearly how the fluid temperatures change during heat transfer. 


 

Heat Exchanger

Product Code : SLE/EA/17
  • The hot water system gives stable flow rates and temperatures. 
  • The hot and cold fluid streams have different connectors to reduce errors.
  • An electrically operated valve opens to let water in to fill the tank.  
  • Thermocouples at the connectors measure hot and cold inlet and outlet fluid stream temperatures. 
  • Some heatexchangers also have built-in thermocouples for extra temperature measurements. 
  • Clear, multiline digital displays show the temperatures and flow rates of the fluid streams.  
  • The tank has protection in case of over temperature, low water level and overfilling.
  • It provides hot and cold water to the heat exchangers and all the instruments needed to measure their performance.
  • All fluid connections to the optional heat exchangers are self-sealing quick connectors – for safety and simplicity.  
  • The services module’s cold water circuit has a flow regulator and connection for an external mains water supply. 
  • Both the cold and hot water system have precision needle valves and turbine flow meters to control and measure the flow rates. 
  • All optional heat exchangers have the same nominal heat transfer area and wall thickness, so students can compare them directly. 

Thermal Power Plant with Steam Engine Trainer

Product Code : SLE/EA/18
  • A mobile frame contains all the parts of the test set. 
  • An electric pump draws from a reservoir (included) to deliver water to an electrically-heated boiler. 
  • The boiler includes a safety valve, water level gauge and ‘blow-down cock’. 
  • A throttling calorimeter allows students to measure the dryness fraction of the steam. 
  • Two mechanical gauges show the boiler and engine inlet pressures. 
  • The boiler produces steam to turn a two-cylinder steam motor. 
  • The equipment includes all instruments needed for the experiments. 
  • A meter shows the electrical power supplied to the heaters in the boiler. 
  • The used steam from the motor outlet passes through a mains water-cooled condenser, then down to a waste tank or to a measuring vessel. 
  • These include a band-brake dynamometer with a digital torque and speed display, to measure and display motor speed, torque and power. 
  • Thermocouples connect to a digital temperature display to measure and display temperatures at key points in the test set.
  • Supply a stopwatch and thermometer to allow accurate measurement of the flow and temperature of the condensate.

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Unsteady State Heat Transfer

Product Code : SLE/EA/19
  • A controller switches the power to an electric heater to keep a constant ‘bulk’ water temperature inside the vessel. A temperature controller maintains a constant water temperature for the test shape. 
  • This gives multiple experiments in heat transfer. 
  • Precision instruments measure the temperatures at key points on clear multi-line displays. 
  • The test shapes are of different dimensions and material to give different heat transfer areas and thermal conductivities.  
  • The student immerses the test shape and measures the transient temperature changes caused by the sudden immersion.
  • They then immerse the other test shapes and compare the results to find how their different surface area, shape and thermal properties affect the heat transfer. 
  • The vessel has a large volume of water compared to the test shapes, so their immersion has a negligible affect on the bulk temperature. 

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Water To Air Heat Exchangers

Product Code : SLE/EA/20
  • Water to Air Heat Exchanger mirrors air heating and water cooling applications. 
  • An electrically operated valve opens to let water in to fill the tank. 
  • The air exits the duct through a handoperated slide-valve. 
  • The tank has protection in case of over temperature, low water level and overfilling. 
  • A precision needle valve and flow meter control and measure the water flow rate. 
  • Students use the orifice and valve to measure and control the air flow. 
  • Thermocouples at the water connectors and in the air duct measure hot and cold inlet and outlet fluid stream temperatures. 
  • For safety and simplicity, the heat exchangers have selfsealing quick connectors for their water supply. 
  • The cooling air passes down a vertical duct containing an orifice plate which connects to a differential pressure transducer. 
  • The air then passes through a fixed speed centrifugal fan and along a horizontal duct containing the heat exchanger.
  • It fits on a bench top and includes a hot water supply, a cooling air duct and all instruments needed for tests on cross-flow heat exchangers. 
  • The heat output of the design produces good results without greatly affecting the temperature of a reasonable size classroom or laboratory. 

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Saturated Steam The Marcet Boiler

Product Code : SLE/EA/21
  • The apparatus consists of a rigid frame containing an insulated pressure vessel (boiler) and an instrumentation and control unit. 
  • The electrically-heated boiler holds water. 
  • The boiler includes a special-purpose glass window. 
  • A pressure relief valve limits the maximum boiler pressure. 
  • The frame also has extra space for the optional interface. 
  • As the water temperature increases, so does the pressure in the boiler. 
  • A transducer and a thermocouple measure the boiler pressure and temperature. 
  • A digital display shows the values in both SI and traditional units. 
  • For sound engineering practice a mechanical Bourdon type gauge also displays the pressure. 
  • It works independent of the electrical supply so the user can always see the pressure in the vessel. 
  • The electrical heater has a thermostat to limit the maximum heater temperature. 
  • It allows students to see the internal construction of the vessel, to see the boiling process and to check the water level. 
  • For safety, the equipment includes high temperature pipe to direct any vented steam away from the working area to a suitable drain.
  • The design includes all possible safety and low maintenance features, specially for educational use. 

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Expansion Of Perfect Gas

Product Code : SLE/EA/22
  • The apparatus consists of two frame mounted interconnected transparent and rigid vessels, with one vessel equipped for operation under pressure and the second vessel under vacuum. 
  • The vessel is pressurised and vacuumed using an electrical air pump together with valves and tappings. 
  • Provides accurate real-time data capture, monitoring and display, calculation and charting of all the important readings on a computer.
  • The vessels are independent and can also be used together to enable the study of various thermodynamic processes. 

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