HOW SOLAR WORKS> energy from the sun - advanced solar power
Solar Water Heating Systems
1
collector
2
collector sensor
3
manual air valve
4
hot water to taps
5
tempering valve
6
collector return
7
check valve
8
hose bids for filling and flushing
9
expansion tank
10
air scoop & air vent
11
circulatint pump with flanges or couplings
12
pressure reliet valve
13
pressure gauge
14
collector supply
15
heat exchange coil
16
solar hot water tank
17
immersion heater
18
USDT 2001 controller
operation
•
the controller (18) will switch on the pump when the temperature at the collector sensor TC is higher than the return temperature TR by at least the pre selected (delta T) amount.
•
the pump circulates a heat transfer liquid around the loop.
•
heat from the collector is transferred to the domestic water through the heat exchange coil in the tack.
•
with the pump running, if delta T is not met, the pump will switch odd.
•
when a present tank temperature is reached at Tmax, the controller switches off the pump.
•
the check valve (non-return valve) prevents heat from the tank fising towards the collectors should the tank be warmer (e.g. at night).
