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HL 630 Efficiency in Heating Technology
Education / GUNT Hamburg / Thermal Engineering and HVAC / Heating and Ventilation in Buildings /

The trainer contains a complete closed heating circuit with circulating pump, electrical heater, convector for dissipating heat, various pipe sections, fittings and safety devices.

  The losses of the most important fittings can be determined using seven differential pressure sensors. Control response and energy flux can be plotted using four temperature sensors, a flow rate sensor and an effective power sensor. The characteristics of a conventional circulating pump and a differential pressure controlled circulating pump can be compared.

   The measured values are transmitted directly to a PC via USB and can be processed with the supplied software. Both circulating pumps, the heater and the convector fan can be controlled via PC.

  The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.

Learning Objectives / Experiments

- familiarisation with a heating circuit

- familiarisation with temperature control
  * two-point controller

  * PID controller
  * recording of step response

- recording of fitting and pump characteristics

- energy balances

- determining pump efficiency from hydraulic power
  and electrical power consumption

- heat transfer with convector (water-to-air heat

  exchanger with fan)

- comparison of circulating pumps

  * conventional pump

  * differential pressure controlled pump 


[1] fundamentals of energy efficient heating technology

[2] closed water circuit with 2 circulating pumps, expansion vessel, heater and convector

[3] 2-point and PID software controller for temperature: reference variable, hysteresis and PID parameters adjustable

[4] boiler safety group according to DIN 4751

[5] 7 differential pressure sensors, 4 temperature sensors, 1 effective power sensor and 1 flow rate sensor

[6] labVIEW software with control functions and data acquisition via USB under Windows XP or Windows Vista


Technical Data

Circulating pumps

- conventional pump, max. head: 5m

- differential pressure-controlled pump, max.

  head: 5m
Electric heater: 2000W
Expansion vessel: 2L


Software controller
- adjustable reference variable: 0...80°C


Measuring ranges

- differential pressure: 5x 0...600mbar, 2x 0...100mbar

- temperature: 0...100°C

- flow rate: 1...50L/min

- effective power: 0...200W

Dimensions and Weight
LxWxH: 1650x220x1100mm
Weight: approx. 150kg
Required for Operation
230V, 50Hz, 1 phase
Scope of Delivery

1 trainer

1 LabVIEW software CD + USB cable

1 set of instructional material

Order Details

065.63000  HL 630  Efficiency in Heating Technology