D5 Solar
The first DC spherical motor pump for
directconnection to photovoltaic panels with automatic performance
optimization using MPP technology (Maximum Power Point tracking)
Application
The Ecocirc solar pump can be used wherever a highly efficient
circulation pump is needed without a direct connection to AC power. It
can be connected directly to a photovoltaic panel and is characterized
by its small size, high efficiency, very low power consumption and its
MPP tracking. The shaftless spherical motor
technology enables a long, maintenance free and quiet service life.
Areas of application are thermal solar systems for single family homes.
Design
The principle of the spherical motor, which was invented by Laing, is
fundamentally different from conventional canned motor pumps. The only
moving part in a spherical motor is a hemispherical rotor/impeller
unit, which sits on an ultra-hard, wear-resistant ceramic ball. There
are no conventional shaft bearings or seals. This rules out, in effect,
the possibility of play in the bearings and the increase in noise
associated with it. These pumps are particularly robust and give
exceptionally long service. The self-realigning bearing is lubricated
and cooled by the media. Maintenance is not necessary under normal
conditions and even after lengthy shutdown periods a reliable start-up
is virtually guaranteed. The parts exposed to the fluid are completely
corrosion resistant.
Soft start-up
The pump has been programmed for a soft start-up. When the photovoltaic
panel provides sufficient power, the pump first goes through the
alignment phase, turning the rotor into the position required for
start-up. Then the processor waits until the built-in capacitor has
recharged sufficiently. This enables a start-up with minimal power
(less than one Watt). Cycling due to unsuccessful starting attempts is
minimized. Even after prolonged shutdown, the pump will start reliably.
Automatic performance optimization – MPP tracking
The Ecocirc DC pumps are the first and only spherical motor pumps with
self-optimizing software (see diagram). Every three seconds, the
processor will modify its operating point on the voltage-current curve
of the PV panel to find the point of maximum performance. This is
called the “Maximum Power Point” (MPP).
At this point, the pump achieves the maximum rpm and therefore the
maximum performance. There is no need for a separate performance
adaptation, the pump will always find its best operating point under
any given light and temperature conditions by itself.
Pump Curve
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Technical Data
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Motor design: Electronically commutated,
spherical motor
-
Voltage Range: 8 to 24 V DC
-
Maximum system pressure: 150 PSI (brass
housing), 50 PSI (plastic housing)
-
Maximum Temperature: 230°F (brass),
140°F (plastic)
-
Acceptable media: Domestic hot water, heating
water, water/Glycol mixtures and other media on request.
Pump Housing
|
|
Common Applications
-
Solar systems
-
Computer cooling
systems
-
Circulating
systems for homes, RV’s and boats
-
Engine block
circulating systems
-
Juice machines
-
Aquariums and
ponds
-
Oxygen generating
systems
-
Vending machines
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Water fountains
-
Process
temperature control
-
Remote area fluid
handling
Snap-out Design
Snap-out design of
motor drive unit permits motor replacement without draining the pump’s
fluid. No special tools required. The DC motor can easily be swapped
with an AC motor.
|
| Model |
Housing design |
Connection
|
Shipping |
| No. |
|
|
Weight |
D5
Bronze Series (8-24V DC, 3-35 Watts, 0.30-1.50
Amps) 230° F
|
| D5 solar 720 B |
Inline |
1/2’’ sweat connection
|
3.0
|
D5 solar 710 B
|
Inline
|
1/2’’ female pipe thread
|
|
| D5 solar 090 B |
Inline / BV+CV+PV*
|
1/2’’ union sweat
|
3.0
|
D5
Plastic/Stainless Steel Series (8-24V DC, 3-35 Watts,
0.30-1.50 Amps) 140° F
|
| D5 solar 850 N |
Angled housing |
1/2"
male thread |
2.0
|
| D5 solar 810
N |
Angled housing
|
1/2"
hose barb |
2.0
|
| D5 solar 790
N |
Angled housing
|
3/4"
hose barb |
2.0
|
