Matching The React Pump Supply To Demand Changes; Incrementally Increasing The System Size Cost To Meet Your Needs - EcoInnovation React Pump System Design And Installation Manual

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2.3.5.

Matching the React pump supply to demand changes

Matching the supply of the pump to your demands is achieved by adequately sizing your
storage tank. Bigger is always better. The amount of water pumped will change with the
available sunlight but this will normally also mirror your demands.
2.3.6.

Incrementally increasing the system size cost to meet your needs

Let's assume you are a farmer with a moderate sized herd and need a water supply on the
back hilly part of the farm. There is no utility/mains power available. Water had previously
been provided by access to a stream and small man-made pond. This practice is no longer
acceptable due to the new fencing requirement to help reduce water pollution from large
farm animals. You also want to fence into paddocks the large hill block, so gains can be
made from improved stock & pasture management.
You are very busy, have only $3-5000NZ to spend on the pump and PV array. You do not
want to waste any more time trying to accurately determine how much water you will need
each season as you need the problem mostly solved immediately. Fencing work is about to
start and that means water for paddock troughs is needed urgently. Your gut feeling based
on decades of farming experience is that 5,000-10,000 L/day in summer should do it. Google
Earth indicates the hill is about 50-70m high (above pond level).
In this case the farmer can:

Start off by installing a minimum package of one React pump and 540W of PV on a
pontoon on his pond or on the adjacent land.

If more litres/day are needed later, the PV array size can be doubled at this later
date.

If still more litres/day are needed (mainly on hot clear summer days) the array can be
configured East/West.

If still more flow is needed another React pump can be installed with 540W of PV per
React pump.

If still more flow is needed the second React pump can have another 540W of PV
added.

If still more litres/day are needed (mainly on hot clear summer days) the arrays can
both be configured East/West.

If still more flow is needed on overcast days or in winter time each React pump can
have up to 1620W of solar PV added.
The above example illustrates that you can take a "watch and see approach" if you are
unsure of your pumping needs, or if your demand grows in the future. The farmer will need
to consider whether the original delivery pipe is large enough and it may need to be
upgraded or additional pipe(s) installed as the system is upgraded.
© 2019 EcoInnovation Ltd (NZ) V2.1
React Pump Installation
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