Technische Alternative - Varmt vand fra solen
Technische Alternative - Varmt vand fra solen
Technische Alternative - Varmt vand fra solen
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The event control “overwrites” the speed results from other control methods. A set event<br />
can thus block the control of absolute values or differences.<br />
In the example, keeping the collector temperature at 60°C with the absolute value control<br />
is blocked when the tank has already reached 55°C at the top = the fast provision of hot<br />
water is complete and is now to be continued with full volume flow (and hence a lower temperature<br />
but slightly better efficiency). To do so, a value that value automatically requires full<br />
speed (such as S1 = 10°C) has to be entered as the new desired temperature in the event<br />
control.<br />
Waveform<br />
Two waveforms are available for motor control. (ex works = WAVEP)<br />
WAVEP Wave packets - only for circulating pumps with standard motor dimensions. Here,<br />
individual half cycles are bled in to the pump motor. The pump runs on pulses and<br />
only produces a smooth flow of the heat transfer medium when the rotor’s moment<br />
of inertia has been overcome.<br />
Benefit: Great dynamics of 1:10, well suited for usual commercial pumps without<br />
internal electronics and a motor length of around 8 cm.<br />
Drawback: Linearity depends on the pressure loss; there is some noise, not suitable<br />
for pumps with evidently deviating motor diameters and / or length from 8<br />
cm.<br />
PHASE Phase angle - for pumps and ventilation motors. The pump is switched to the grid<br />
within each half cycle at a certain point (phase).<br />
Benefit: Suitable for almost all motor types<br />
Drawback: Low dynamics of 1:3 for pumps. The device has to have a filter upstream<br />
to fulfil the CE standards for interference suppression<br />
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