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 TeLC1976
Dipl. Ing. A. Kutschelis & Sohn

Technische Lehrmittel Construktion		 Hochstr. 8
D- 59425 Unna
Germany

web: http://www.telc.de
mail: mail@telc.de
phone.: +49 (0) 2303 239999
facs: +49 (0) 2303 239990
   
 
printable version Heat pumps
 
Heat pump 1000W with reservoir
   
Heat pumps
Heat pumps allow the utilization of free environmental energy. Their build-up is equivalent to a cooling unit. With the help of electric energy they can use existing free environmental energy from wells, soils or ambient atmospere for heating purposes, by pumping it on higher temperature level. The test stand demonstrates practically the dependencies of the thermo-dynamical cycle process. Above photo shows on right heat pump producing hot water for air-heating (Test stand "Fan- and thermic measurements").
 
Systems:
  • 1000W compressor
  • Fan and thermic heat pump
  • Air-cooled evaporater
  • Coaxial condensator avoids water generation
  • 50l reservoir
  • Efficiency up to 4
 

Measuring systems:

The measuring devices are digitally connected to the internal controller, sending serial data to the comprised portable PC. Stand control and data acquisition can be performed by Windows-software. Measured quantities are:

  • 3 x temperatures: Before and behind condensator and reservoir
  • Temperature and pressure of refrigerant agent
  • Water flow rate
  • Electrical power consumption
 

Extension:

The stand is moveable and can be connected to a warm water consumer like Test stand "Fan and thermic measurements"
 

Technical details:
Dimensions:
 1.1m x 0.8m x1.6m
Weight: 50 kg
Services: 240 VAC, water
 
Heat pump 250W
 
Heat pumps
Heat pumps allow the utilization of free environmental energy. Their build-up is equivalent to a cooling unit. With the help of electric energy they can use existing free environmental energy from wells, soils or ambient atmospere for heating purposes, by pumping it on higher temperature level.
 
Systems:
  • 250W compressor
  • Air-cooled evaporater
  • Coaxial condensator against water
  • Control of water flow-rate
  • Manometer, usable in cold environments
  • Efficiency up to 4
 

Measuring systems:

The measuring devices are digitally connected to the internal controller, sending serial data to the comprised portable PC. Stand control and data acquisition can be performed by Windows-software. Measured quantities are:

  • 3 temperatures: Before and behind condensator, and in reservoir
  • Temperature and pressure of refrigerating agent
  • Water flow-rate
  • Electrical power consumption
 

Extension:

The stand is moveable and connectable to Solar collector.
 

Technical details:
Dimensions:
 1.1m x 0.8m x1.6m
Weight: 50 kg
Services: 240 VAC, water
 
log p/h diagram of heat pump:
 
Heat pumps
qc is the effective heat with the niveau tc.

qo is the for cooling processes usable refrigerating capacity.

In the diagram you can see that efficiency E depends on tc and to and on the quality of the plant's devices. This dependency can be shown with this test stand.
Keywords: Refrigeration, Heat Pumps, Vapor-Compression, Refrigerator, log p,h-diagram, Refrigerant, Efficiency, Entropy, Enthalpy, boiling state
 
©TeLC Unna 2004 
   
 
printable version Solar Collector
 
Solar Collector
Natural solar radiation 0,5 m²
This test stand implements a solar collector for warm water generation. There are two different versions available: One for natural solar radiation and outdoor use and another for indoor use with artificial radiation. The scheme shows the build-up. T1,T2 and T3 are temperature sensors. Valve V1 controls the water flow-rate. V2 provides water outlet and V3 controls the water supply. The heat-up test demonstrates all influencing variables. The collector size is 0,5 (0,25) m², the flow direction is from down to up. The heated water flows into the accumulator. The pump sucks from the accumulator's bottom and feeds the water through a rotameter into the collector.
 
Systems:
  • Accumulator 2l
  • Infeed and outlet of the water
  • Flow control
  • Impressive results are obtained within one hour with natural radiation.
  • Power absorption > 500 W/m²
  • Temperatures > 70° C
  • Artificial radiation with vitalux spectrality (nearly natural); 4 thyristor controlled lamps
  • Inclination horizontally and variable distance.
Solar Collector
 
Solar Collector
 
Solar Collector
Artificial radiation 0,25 m², 1200 W

Control and measuring systems:

The plant comprises usual sensors, connected to a long time data-logger with radio controlled clock. The logger can be connected serially to a PC and the logged and current data can be read out and evaluated with the included Windows-software. Measured quantities are:

  • 3 x Temperatures
  • Flow-rate
  • Real time calculation of derivative quantities i.e. power.
 

Extensions:

Moveable test stand, connectable to Heat pump.
 

Technical details:
Dimensions: 0.8m x 0.8m x 1.6m
Weight: 65 kg
Services: 240 VAC, water
Keywords: Regenerative Energies, Weather station, Solar collector, Solar plant, Solar cell, Heat Pump, Energy conversion, Water, Air
 
©TeLC Unna 2004 
   
 
printable version Airpower
 
Airpower
This wind-power test cell consists of a wind-source and a fully functionable wind power driven generator with multiple airscrews with different properties. The whole issue of energy conversion can be demonstrated.
 
Variable parameters:
  • Diameter (250-300mm)
  • Blade number (2-5)
  • Screwpitch (65°-80°)
  • Screwcurve (11-35°)
 
Properties:
  • Measuring systems on the generator
  • Supporting calculations with Euler´s law and speed triangles
  • Reflections on stability and stormsecurity can be substanciated
  • Use of the windchannel for other airflow researches is provided
 
Measuring systems:
  • Torque and speed
  • Electrical power output
  • Wind speed
 

Technical details:
Dimensions: 1.2m x 0.8m x 0.8m
Weight: 40 kg
Services: 230V AC
Keywords: Energy conversion, Wind generator, Wind channel, Wind tunnel, Wind power, Air, Regenerative energy, Airscrew, Efficiency
 
©TeLC Unna 2004 
 
printable version torquemotor-teststand

Electrification of vehicle drives is coming up more and more. The battery is the most important object. Till today weight of the enery content is 10 times of that with gasoline. And the costs are a lot. Energy balance is only then ok if charging current is generated by regenerative means. All these developments are going on. If the battery is heavy then the vehicle itself must be eased, new material is being developped for that purpose.

Training of vehicle experts is needed for the fundamentals of this new technology. TeLC want to help here with ist new teststand.

Technical data of the teststand:

  • Brushless and gearless engine
  • 5 years guaranty
  • motor power up to 600W
  • torque max. 37 Nm
  • speed max 400 rpm
  • Battery LiFePo4 40 V 400Wh,
  • 2000 rechargings without loss of capacity
  • charger 10A, charging time max. 90 min
  • Controller with current limit, cruise control
  • braking with recuperation
Build-up:

Torque engine is coupled with a three phase engine by means of a Poly-V-beltdrive
Three phase engine is equipped with variable speed control.
The operation functions:
  • Power controller torque-engine
  • Speed governance of the three phase engine
  • Batterie discharging / charging
  • Braking with the torque engine
Data indications and data acquisition only by PC
  • torque
  • speed
  • batterie voltage
  • discharge- / charging current
  • mechanical power
  • electrical power
Tests:
  • Speed performance of the drive
  • Current consumption / reach on different speeds
  • Braking and regeneration
  • Charging characteristic of the Batterie
Measurement results of some tests:
each:

left diagram
torque red
speeds blue
voltage rose
current green
right diagram
electric power red
mechanical power blue

upper: fulload at all speeds
torque is max on start, reduces with speed. Ideal characteristic
from 250 rpm on currentflow is blocked more and more.
Efficiency is max at 250 rpm.

middle: Currentconsumption at constant speed 200 rpm
With controlling different can be regulated different torques and herewith different powers

down: Brake power and charging battery
Charging current rises to appr. 8A with speed
Brake torque, -power and regenerating rise with speed.
Downhill can be regenerated much energy.

 

Stichworte: Motortechnik Übungsstand, Leistungsprüfstand, Motorleistungsprüfstand, Ventilverstellung, Indizieren, Viertakt Motor Modell, Ottomotor Modell, Motorprüfstand Messtechnik, Motorprüfstand Datenerfassung, Verbrennungsprozess, Ventilsteuerung, Druckindizierung, Motorprüfstand, Glaszylinder-Motortechnik-Stand, Megatech, Glaszylinder, variable Ventilsteuerung, 4-Takt-Ottomotor, 4 Takt Motor, 4 Takt Otto Motor, gläserner Zylinder, transparenter Zylinder, Kurbeltrieb, Kolben, Ventile, Zündung, Verbrennung, verschiedene Kraftstoffe, Saugrohr-Einspritzung, Einspritzung, Einspritzmenge, Einspritzzeitpunkt, Einlass, Auslass, Ventilhub, Zeit-Öffnungs-Querschnitt, elektronische Zündung, Kennfeldzündung, Schließwinkel, geregelter Katalysator, Kurbelwellenstellung, Lambda-Sonde, Abgastemperatur, Drehmoment, Motorbetriebszustand, Zünden, Einspritzen, Kraftstoffmenge, Ventilsteuerzeiten, Frühzündung, Spätzündung, Überschneidung, Einlassventil, Auslassventil, Einlaßventil, Auslaßventil, Kennpunkt, Kennfeld, Indizieren, Zylinderinnendruck, Motordrehmoment, angesaugte Luftmenge, Expandieren, Auswerfen, Ansaugen, Verdichten, Warmlauf, Kaltstart, Indikatordiagramm, Vorzündung, gute Gemischbildung, Steuerverfahren, Laststeuerverfahren, Spätes Einlass Öffnen, Spätes Einlaß Öffnen, Spätes Einlass Schliessen, Spätes Einlass Schließen, Wandkondensation, Kraftstoffverbrauch, Kurbelwellenwinkel, Laufgrenze, fett, mager, stöchiometrisches Verhältnis, P/V-Diagramm, Drosselklappe, Gaswechselschleife, Vollast, Teillast, Volllast, Teilllast, Verlustminimierung, Vier-Takt-Motorbremse, Motorbremse, völlig variable Ventilsteuerung, variable Steuerzeiten, Lambda-1-Technik, Magerbetrieb, Leistungssteuerung, Valvetronic
 
©TeLC Unna 2004 
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