What is an open loop borehole sea water collector?

Open loop borehole ground source heat pump installations in sea water transfer water from one location to another, extracting heat energy in the process.

As per all open loop system collectors, no anti-freeze fluid is featured in seawater open loop borehole installations. Water from the seawater is abstracted and filtered through the heat pump via a borehole. This water is then discharged either back to another section of the seawater via a second borehole or open loop straight pipe.

Consideration needs to be taken with regards to corrosion issues, filtration, extraction and possible freezing within the heat exchanger. It is also important to consider the electrical energy required to pump the water to the heat pump.

Things to consider

If you are considering an open loop borehole for your ground source heat pump system, there are a number of points which need to be taken into consideration:

  • Seek relevant permissions from the Environmental Agency
  • Consider the design of any scheme to ensure its longevity and efficient performance
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