Investigation of thermal expansion of different pipe sections (PVC, PE, Cu, steel)

Learning objectives/experiments

• thermal expansion of different materials such as PVC, PE, copper and steel
• determination of thermal expansion coefficients and the expansion force
• measurement of pipe elongation
• effect of varying pipe diameter
• expansion compensator

Investigation of four different temperature measuring methods

Learning objectives/experiments

• function, type of construction and applications of bimetallic dial thermometers
• function, type of construction and applications of liquid expansion thermometers, resistance thermometers and thermocouples
• measuring precision, sensitivity and measuring errors of the different thermometers
• installation methods, installation errors and response

Investigation of the pressure difference in four equal-length pipe sections made of different materials

Learning objectives/experiments

• investigation of the pressure losses of flow through pipes
  • measurement of the pressure differential on different pipe sections
  • influence of various pipe diameters
  • influence of different materials and surface roughness
  • effect of the flow velocity
    ….

Investigation of the pressure loss of standard valves and fittings

Learning objectives/experiments

• pressure losses in valves and fittings
• measuring the pressure difference
• effect of the valve orifice shape on the pressure loss
• effect of the flow velocity
• determination of resistance coefficients
  ….

Investigation of the pressure loss at pipe elements with different changes in pipe direction and materials

Learning objectives/experiments

• flow measurement
• differential pressure measurement
• effect of flow and surface roughness
• effect of the flow velocity
• effect of changes in pipe direction

Determining the pressure loss in an open pipe section

Learning objectives/experiments

• hydrostatic pressure
• flow pressure
• pressure loss
• representation of pressure curves

Investigation of pressure losses at contractions, pipe angles, pipe bends, valves and fittings and pipe elements

Learning objectives/experiments

• pressure curve in a closed pipe system with circulation pump
• influence of pipe diameter, flow velocity, change in cross-section and pipe fittings on the pressure losses
• determination of pump characteristics, system characteristics and the operating point

Effect of mixing ratio on feed flow and circulating flow temperature

Learning objectives/experiments

• function and operating behaviour of a three-way mixing valve
• effect of mixing ratio on feed flow or circulating flow temperature
• effect of mixer setting on the flow rate

• in conjunction with other training panels in the HL 100 series, it is possible to set up a complete heating system.

Effect of mixing ratio on feed flow and circulating flow temperature

Learning objectives/experiments

• function and operating behaviour of a four-way mixing valve
• effect of the mixing ratio on feed and circulating flow temperature
• effect of mixer setting on the flow rate

• in conjunction with other trainers in the HL 100 series, it is possible to set up a complete heating system.

Series and parallel operation of two pumps

Learning objectives/experiments

• pump characteristics at varying speeds
• determination of pipework characteristics and operating points
• series operation of circulating pumps
• parallel operation of circulating pumps
• comparison of experiment and calculation
  ….

Displacement volume of an expansion vessel as a function of the pressure

Learning objectives/experiments

• function and operation of a diaphragm expansion vessel
• displacement volume of an expansion vessel as a function of the pressure

Function of safety valves against excess pressure and excess temperature

Learning objectives/experiments

• function of safety valves
• function and layout of a system of safety devices
• function of a thermal discharge safety device

Familiarisation with a hot water heating system

Learning objectives/experiments

• hydronic balancing of radiators
• determination of the heat emitted
• determination of pipework characteristics for different operating conditions
• in conjunction with other training panels in the HL 100 series, it is possible to set up a complete heating system.

Model of a central heating system with radiators, circulating pump and four-way mixing valve

Learning objectives/experiments

• familiarisation with a central heating system and its components
• hydronic balancing of radiators
• function and operating behaviour of a circulating pump
• function and operating behaviour of a heating controller
• function and operating behaviour of a four-way mixing valve

Operation of a modern heating controller

Learning objectives/experiments

• operation of a modern heating controller
• temperature setting
• operating characteristics

Basic principles of energy efficient heating technology with a computer-supported learning process

Learning objectives/experiments

• familiarisation with a heating circuit
• familiarisation with temperature control
  • two-point controller
  • PID controller
  • recording of step response
    ….

Hydronic balancing of a heating system: three heating subcircuits with radiators, thermostatic valves and circulation pump

Learning objectives/experiments

• variable pipework resistance
• familiarisation with a preset balancing valve
• familiarisation with a preset thermostatic valve
• familiarisation with a differential pressure overflow valve

Determining characteristic parameters of a solar thermal system; model fitted with artificial radiation source

Learning objectives/experiments

• design and operation of a simple solar thermal system
• determining the net power
• energy balance on the solar collector
• influence of illuminance, angle of incidence and flow rate
• determining efficiency curves
  ….

Function and operating behaviour of a parabolic trough collector, accessorie for ET 202

Learning objectives/experiments

• focusing solar radiation with a parabolic trough mirror
• optical concentration factor
• conversion of radiant energy into
  heat
• losses in thermal solar collectors
  ….

Function and operating behavior of a parabolic trough collector, astronomical and sensor-based sun tracking, system control via PLC

Learning objectives/experiments

• focusing of solar radiation with a parabolic trough mirror
• optical concentration factor
• DNI: Direct Normal Irradiance
• sensor-based sun tracking
• astronomical sun tracking
  ….

Demonstration of the conversion of the sun's radiation energy into heat and the storing of that heat, operating the solar controller via web browser

Learning objectives/experiments

• familiarisation with the functions of the flat collector and the solar circuit
• determining the net power
• relationship between flow and net power
• determining the collector efficiency
• relationship between temperature difference (collector/environment) and collector efficiency

Function and operating behaviour of a hot water heating system with digital heating controller

Learning objectives/experiments

• familiarisation with the components of a modern heating system and their function
• operating behaviour of a digitally controlled heating circuit with three-way mixing valve
• operating behaviour of a digitally controlled heating circuit with four-way mixing valve
• investigations on a plate heat exchanger operated in counterflow
• investigation of pressure loss on different valves and fittings
  ….

Setup of a complete domestic heating system together with HL 353.01 and/or HL 353.02

Learning objectives/experiments

• setup of a hot water heating system for room heating
• function and design of commercially available components
• boiler with oil burner, burner control and safety devices
• measurement of differential pressures and temperatures

….

Two independent heating circuits: floor heating or forced convector with fan and two radiators

Learning objectives/experiments

• design of a floor heating with controller and actuator
  • temperature-led heating controller (outside temperature) with three-way mixing valve
• design of a room heating system with radiators
  • thermostatic valve
  • one-pipe radiator valve
    ….

Two independent heating circuits with control devices: heating circuit with one subcircuit and with two subcircuits

Learning objectives/experiments

• design of a room heating system with controller and actuator
  • temperature-led heating controller (outside temperature) with three-way mixing valve
  • simulator for varying outside temperature
• function and design of a room heating system divided into sections
• hydronic balancing of heating circuits with multiple radiators
  ….

Heating boiler with viewing window for observing the flame

Learning objectives/experiments

• layout and operating behaviour of an oil burner
• operation of a heating boiler with an oil burner
• effect of burner setting on combustion and on the flame
• temperature measurements in different areas of the combustion chamber
• oil pressure measurements on the burner with observation of the effects of changes on the flame
  ….

Heating boiler with an oil burner; hot water generator for other trainers from the HL series

Learning objectives/experiments

• function of an oil burner
• operation of a heating boiler with an oil burner
• burner adjustment during operation
• temperature measurements in different areas of the combustion chamber
• calculation of the heating capacity of a heating boiler
  ….

Design and operating behaviour of a heating boiler with hot water storage

Learning objectives/experiments

• design and operating behaviour of a heating boiler
• comparison of burners (3 different burners available as accessories)
• changes in settings during operation with observation of the effects on the flame pattern
• temperature measurements in different areas of the combustion chamber
• oil pressure measurements on the burner with observation of the effect on the flame pattern
  ….

Easy to operate gas analysis device

Learning objectives/experiments

• measurement of residual oxygen in the flue gas of heating systems
• measurement of carbon monoxide
• measurement of nitrogen oxide
• measurement of flue gas and combustion air temperature

Investigation of tank safety devices and their function

Learning objectives/experiments

• oil tank with stipulated outlet, filling and safety devices
• standards, technical rules, legal requirements and regulations for the storage of heating oil
• function of tank protection devices
• filling an oil tank
• drawing oil from a tank

Function and operating behaviour of safety valve, safety pressure cut-out, temperature controller, flow switch and much more

Learning objectives/experiments

• function and operating behaviour of
  • safety valve
  • quick-action ventilating valve
  • safety pressure cut-out
  • thermal discharge safety device
    ….

Simulation of leaks in pipes

Learning objectives/experiments

• simulation of different leaks
• demonstration of leak detection
• working on gas pipes
• testing before and after gas connection in accordance with regulations

Methods of gas burner adjustment; simulation of twelve faults

Learning objectives/experiments

• gas burner adjustment by volumetric method
• nozzle pressure method for gas burner adjustment
• fault finding

Nominal load adjustment and fault finding on a gas burner; hazard-free due to operation with air

Learning objectives/experiments

• familiarisation with components for heating systems
• starting a gas burner
• nominal load adjustment on a gas burner
• fault-finding and fixing
• calculation of the gas flow rate / operating volume

Electronic simulation of the operation of a forced air gas burner

Learning objectives/experiments

• specification of boiler temperature at the thermostat (reference variable) using potentiometer
• specification of boiler water temperature using potentiometer
• representation of flame aspect and burner operating state displays
• possible faults (activated using pushbuttons):
  • air pressure control device
    ….

Functioning of a typical combination boiler; separate circuits for room heating and domestic water heating

Learning objectives/experiments

• familiarisation with the functioning of a combination boiler
• understanding of a heating circuit
• domestic water heating
• measurement of gas pressures on a gas boiler
• determination of power and efficiency