The electrical heat source is controlled electronically. The heat sink is water-cooled. The temperatures of the heat source, cooling water and specimen are indicated. An interchangeable cylindrical specimen is fitted between a heat source and a heat sink. The specimen is prefitted with twelve thermocouples distributed along its length. This unit is used to investigate steady-state and non-steady-state heat conduction processes. There are also displays for heating capacity and cooling water flow rate. In addition, it is possible to transfer the measured data to a computer via USB and display the data on the computer. The software is included. The thermal conductivity can be calculated using the measured data.
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The simple heating circuit with one subcircuit contains two flat radiators and is controlled by a temperature-led controller. A three-way mixing valve is the actuator. A complete domestic heating system can be set up using the trainer together with a hot water generator, Hot water passes through the radiators and heats the room air. It contains two heating circuits. A simulator is supplied for varying the outside temperature. The heating circuit with two subcircuits contains four radiators and two heating controllers. Both heating circuits are equipped with commercially available heating technology control devices. Solenoid valves enable control of the heat distribution in the two subcircuits. Each heating circuit contains a circulating pump.
Learning objectives/experiments:
Hydronic balancing of heating circuits with multiple radiators
Function and design of commercially available heating technology components
Design of a room heating system with controller and actuator
Temperature-led heating controller (outside temperature) with three-way mixing valve
Measurement of differential pressures, temperatures and flow rates
Energy calculation and evaluation of emitted heating capacity based on measured quantity of heat
Simulator for varying outside temperature
Function and design of a room heating system divided into sections
Reading and comprehension of symbols and process schematics
The Heat Exchange Study Unit is available in two versions:
Computerized Heat Exchange Study Unit
Heat Exchange Study Unit
The exchanger and its operating mode is by means of manual valves. The system has an electric heater with a thermostat for the production of hot water. All the exchangers are mounted in parallel and can be used separately, operating in equicurrent or counter-current conditions, except from S1 and S4. Cold water is taken from the water mains. The unit is supplied with manuals that describe each component of the system, installation and utilization procedures and many exercises with the relative results. The bench is trolley mounted and is equipped with a front panel, featuring a silk-screen printed synoptic panel.
A bench top service unit makes it possible to supply hot water to different types of heat exchangers, which are small scale versions of the commonly used industrial ones. The Heat Exchanger Bench Top Study Unit has been designed to carry out experiments concerning the main techniques of heat transfer. Thus the student can compare their performance, fully understand the importance of a correct choice and, if possible, compare the influence of co-current and counter-current heat exchange.
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Temperature and flow data obtained can be used to calculate energy balance, heat transfer and heat transfer coefficients.
A valve is provided to reverse the tube-side flow direction. The two exchangers are of similar surface area but with unique design features. The Heat Exchanger Demonstrator consists of two heat exchangers with associated temperature indicators, flow indicators and a temperature indicating controller.
Plate exchanger with stainless steel plates
Single pass shell and tube exchanger brass
Function:
The Heat Exchanger Demonstrator is connected to hot and cool tap water. Trainees select exchanger type, flow direction and flow rate then read and record the flows and temperatures for further analysis. Process (hot) water flow is manually controlled. Cooling water flow may be either manually controlled or automatically controlled to a selected process temperature set-point.
Internal electric and mechanical safety devices to allow for unsupervised operation by students.
Instrumentation to measure up to 12 temperatures and the relevant flow rates of the hot and cold fluids through the heat exchanger under test.
A bench mounted heat exchanger service unit comprising a reinforced plastic instrument panel with electric water heater and circulating pump providing temperature controlled hot water from self sealing quick release couplings. Controlled and measured cold water is taken from the local supply.
Supply unit for heat exchangers
Digital displays for 6 temperature and 2 flow rate sensors
Flow adjustable using valves
Water connections with quick-release couplings
Hot water circuit with tank, heater, temperature controller, pump and protection against lack of water
Temperature controller controls the temperature of hot water
Stirring machine connection with speed adjustment
Cold water circuit from laboratory mains or water chiller.
The Heat Exchanger Trainer With PID Loop Control are of equal surface area with each one having unique features. The Heat Exchanger Trainer apparatus consists of six heat exchangers with associated fluid temperature indicators and flow indicating controllers. Trainees are able to learn the impact of: construction material, flow pattern or direction, turbulent or laminar flow, and exchanger design. The transfer of heat energy between fluids is a very common industrial operation.
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Heat Exchanger Training System
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Combinations of different media: water / refrigerant, refrigerant / refrigerant, air / refrigerant
Water circuit with tank and pump to cool the condenser and heat the evaporator
Flow meter and thermometer in the water circuit to determine the exchanged energy fluxes
Refrigeration system with 4 different heat exchangers: coaxial coil heat exchanger, finned tube heat exchanger, tubular heat exchanger, plate heat exchanger
Superheater can be disabled via bypass
Thermometers at all relevant points of the system.
Heat exchangers are essential elements in refrigeration systems. A heat exchanger is an energy (heat) exchange system between a hot and a cold fluid. On the other hand, during heating, exchangers are used as refrigerant condensers to discharge energy. In some refrigeration cycles, depending on the application, it is necessary to superheat or supercool the refrigerant. In refrigeration circuits, during cooling heat exchangers are used as evaporator, to absorb energy from the refrigerant.
Experimental unit for the training of apprentices for refrigeration area. The unit includes wheels for its mobility. Main metallic elements made of stainless steel. Diagram in the front panel with distribution of the elements similar to the real one. Anodized aluminum frame and panels made of stainless steel.
The Service Module is the core of the range. An electrically operated valve opens to let water in to fill the tank. The tank has protection in case of over temperature, low water level and overfilling. All fluid connections to the optional heat exchangers are self-sealing quick connectors for safety and simplicity. The hot and cold fluid streams have different connectors to reduce errors. The services modules hot water system includes a tank with a PID controlled electric heater, a pump and tank level indicators. It provides hot and cold water to the heat exchangers and all the instruments needed to measure their performance. The hot water system gives stable flow rates and temperatures.
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Heat transfer from the simple flat plate may be compared under the same test conditions when either the aluminium rods or heat pipes are inserted. The Heat Pipe Investigation Accessory includes a drilled aluminium plate with integral heater and temperature sensor that is designed to fit the aperture in the Cross Flow Heat Exchanger duct.The flat plate is drilled to accept either finned heat pipes or similar geometry finned aluminium rods.
Experimental Capabilities:
Investigation of free and forced convective heat transfer to air from a vertical flat plate with and without heat pipe or aluminium rod enhancement.
Demonstration of heat pipe applications in free and forced convection.
Heat Preservation Box
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It is indispensable equipment applied to some experiments in control laboratories and colleges, high schools and middle schools, and plays the role of heat preservation and heating.
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Bench top unit with anodized aluminum structure and panels of painted steel.
Diagram in the front panel with similar distribution to the elements in the real unit.
Main metallic elements of stainless steel.
Computer controlled cooling compressor:
a. Type: hermetic.
b. Power: 1 CV.
2 water condensers, capacity: 1580 W.
2 computer controlled air condensers.
High pressure switch.
Expansion valve.
Coolant accumulator.
Coolant filter to retain particles of condensate.
2 computer controlled air evaporators.
2 water evaporators, capacity: 1580 W.
4 manometers, situated at important points of the process.
13 type J temperature sensors.
Liquid separator to retain liquid particles before being directed to the compressor.
Bench-top unit, with anodized aluminum structure and painted steel panels.
Main metallic elements of stainless steel.
Water condenser, capacity: 1580 W.
High pressure control.
Coolant accumulator.
Diagram in the front panel with similar distribution to the elements in the real unit.
Cooling compressor, computer controlled, power: 1/2 CV.
Air condenser, computer controlled.
Coolant filter to retain particles of condensate.
Expansion valve.
4 Manometers, situated at important points of the unit.
Water evaporator, capacity: 1580 W.
Air evaporator, computer controlled.
Liquid separator to retain liquid particles before going on to the compressor.
The Demonstration Unit Heat Pump Shows the Operation of a Heat Pump - Air and Water. This Comprehensive Training Equipment, Students Will Be Able to Study the Use of Energy From the Environment to Heat Water. The Refrigerant Absorbs the Ambient Heat Through the Fan of the Evaporator, and There After, This Heat is Transferred to the Water in the Condenser. With The Hot Water Storage Tank is Equipped With Internal Heat Exchanger, Which Can Be Connected to the Energy Exchange With the Flow of Running Water. The System Consists of Compressor,circulation Valve, the Flow Control Valve, The storage, Condenser, Filter and Dryer, Regulator and Evaporator With Fan, Water Flow Meters,temperature and Pressure Sensors With Display in the Key Points of the Circuit.
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Refrigeration circuit with compressor, condenser (heat exchanger with fan), 2 evaporators with fan (refrigeration and freezing stage)
Air-to-water heat pump for cooling or heating operation
Displays for temperature, pressure, flow rate and power consumption of the compressor.
Different operating modes selectable via solenoid valves
Glycol-water circuit with tank, pump and coaxial coil heat exchanger
1 thermostatic expansion valve each for all heat exchangers and evaporators
1 additional evaporation pressure controller and 1 capillary tube for the refrigeration stage evaporator
Coaxial coil heat exchanger and heat exchanger with fan can both be used as condenser or evaporator in the refrigeration circuit.
The Heat Pump in Air Conditioning Training Bench has been designed and manufactured to incorporate all current safety standards.
A Heat Pump in Air Conditioning Training Bench for studying the theoretical and practical aspects of the use of heat pumps in air conditioning systems.
The refrigerant used complies with anti-pollution legislation.
Experiments:
Analysing system behaviour and reactions with the variation of condenser and evaporator air flow
Plotting the cycle in a refrigerant pressure-enthalpy diagram
Studying the operation of a heat pump
Studying the operation of a cycle reversing valve.
