TeLC.de

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.

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