Here at Teckna Group, we understand the importance of geothermal ground surveys in evaluating the ground used for borehole drilling. Such is the extensive service that we provide, we’re able to offer geothermal surveys for GSHP sizes from 6kW to 1200kW or even larger! This gives you peace of mind that we’re able to assist with your projects, no matter what the requirements may be.
Geothermal surveying is largely dependant on the reports that are required for the designs of the geothermal system, meaning that a thorough and detailed process is needed at all times. The installation will be to the latest MIS 3005 requirements, making sure that the project is eligible for any government funding. To give you an insight into the end result, here is what your geothermal ground survey includes:
- The site, geology and thermal conductivity will undergo thermo-geological assessment.
- A discussion to define the requirements of your geothermal system, heating and cooling loads.
- The borehole design, modelling, borehole quantity and depth with required spacings.
- A site visit to assess the ground temperature of a borehole with a thermal response test.
- Based on thermal response tests or drilling feedback the re-calculation and final design confirmation.
- Borehole designs of the geothermal survey and installation will be to the latest MIS 3005 requirements to enable the project to comply with the relevant requirements to receive funding from the government.
Geothermal surveying, along with a Thermal Response Test, is largely recommended for larger GSHP as the scale of the project means that more thought may need to be put into its logistics.
A geological geothermal survey will give a strong indication of the thermal characteristics at the site, where the boreholes are to be drilled and where they can be installed. As you can see, accuracy is crucial in such a project, and something we take very seriously as part of our operations here at Teckna Group.
By finding out this information, this will enable the MCS lookup tables to be used to estimate more accurately the heat recovery per metre of a borehole.
In the absence of any geological data assembled from geothermal ground surveys, Teckna Group will estimate the borehole requirement using our expert knowledge and experience, and by using conservative values for heat recovery. However, this can result in 5-10% more borehole metres being drilled than absolutely necessary.
On larger installations, this can easily mean a difference of one borehole or more. This may not seem like a lot at first glance, but with each borehole being likely to add £4-5,000 to the cost of the total installation, it soon begins to make sense to invest in a geothermal survey.
Here is some more useful information about a Teckna Group ground survey:
- As a rule of thumb, installations of up to around 15kW Heat pump capacity can be estimated solely using the MCS tables.
- Installations of 15 to 30 kW should be dimensioned with the help of a geological survey.
- Installations of above 30 kW definitely require a geological survey and could well benefit from a TRT.
If you feel like a geothermal survey is the right next step for you, then the experts at Teckna Group will happily assist you. To get in touch with us today, give us a call on 01257 421700 or email us at enquiries@tecknagroup.co.uk. You can also fill out our online enquiry form with any detailed enquiries you may have.
