Ground Source Heat Pumps


Ground Source Heat Pumps use a buried ground loop that transfers heat from the ground into the building.

Heat supplied by Ground Source Heat Pumps will provide all of the space heating requirements through the use of Underfloor Heating or radiators. Solo can take the installation of ground source heat pumps right from the early ground survey stages, through to the end commissioning and maintenance of the appliance.

The efficiency of ground source heat pumps is measured by the coefficient of performance (CoP). This is the ratio of units of heat output for each unit of electricity used to drive the compressor and pump for the ground loop. An average CoP for a NIBE ground source heat pump is 4.4- 4.9. This means that for every unit of electricity used to power the Ground Source Heat Pump, around four and a half units of heat are produced making it an extremely efficient way of heating a building.

Ground Source Heat Pumps
Ground Source Heat Pump Installer

 

Low Con Buildings Programme

Heating System

Cold Medium from Collectors

If grid electricity is used for the compressor and pump, then you should consult a range of energy suppliers to benefit from the lowest running costs, for example by choosing an economy 10 or economy 7 tariff.

Contrary to popular belief, Ground Source Heat Pumps installed by Solo Heating Installations run almost silently and are comparable in sound to a fridge freezer.

Ground Source Heat Pump Cost

The typical cost for a ground source heat pump installation in a new property is £10,500. All systems we quote will come with a energy savings and running cost comparison sheet; which takes into account all variables to give an extremely accurate prediction on the eventual savings. Against an existing oil, LPG or electricity system, ground source heat pumps have proven to have excellent payback periods, usually less than 8 years. Against gas this increases, as the current Kwh unit gas price is comparably low.

 

NIBE Ground Source Heat Pump Brochure


NIBE Ground Source Heat
Pump Brochure Download
1140 Ground Heat Pump Technical Information

 

 

Which Heat Pump Loop Collectors are right for me?

Heat pump collector systems installed by Solo Heating Installations fall into three categories:

 

Horizontal Loop - Ground Source Heat Pumps

These are used when you have space in your garden to lay the pipes horizontally through the ground. Trenches are dug around 1.2m in depth and 250mm - 400mm wide. The collector pipes are then laid into these trenches and back filled with the removed earth. Trenches must be a minimum of one metre apart and one metre from any foundations or building services. Average collector length is around 400 metres, therefore 400 square metres of area is required.

 

Ground Source Heat Pumps.

Ground Source Heat Pump - Horizontal Loop Diagram

In addition, the trenches must be the same length to ensure equal pressure drops across the collector system. The surface above the collectors should not be built on. The collectors link back to the ground source heat pump in your home.


Ground Source Heat Pumps. Geothermal Heat Pumps

Ground Source Heat Pump - Bore Hole Diagram

Vertical Bore Hole Loop - Ground Source Heat Pumps

Bore holes are dug into the ground normally around 150 metres deep. It is common to have two bore holes dug to supply one home. The holes are roughly 200mm wide and must be kept at least eight metres apart from each other. A loop is lowered into the borehole with a weight to ensure it reaches the bottom of the hole. The hole is then backfilled with a grout mixture which allows easy heat transfer from ground to pipe. The loop is linked back to the ground source heat pump unit.

 


Open Loop Systems - Ground Source Heat Pumps

These are the most efficient systems and are used where a stream, underground water table or lake is next to the home. Pipes are laid onto the bed of the lake and weighed down with concrete or some other weight system. We can then extract the heat from the free flowing water that moves around the system. Special design considerations are given to avoid a flow short-circuit and flow direction must be taken into account as well. These installations do require a permit and must meet statutory requirements.

Ground Source Heat Pumps. Ground Source Heat Pump Installer

Ground Source Heat Pump - Open Loop Diagram

 

Should I choose a Ground Source Heat Pump for my home?


Things to consider:

You will need space outside your house for the ground loop. If you can't fit a ground loop on your land, you can consider boreholes. Boreholes are dug around 150 metres into the earths surface and the loop is lowered Ground Source Heat Pumpsdown into it. Borehole type designs work more efficiently than the area loop design because of more stable temperatures all year round lower in the earths crust.

The ground needs to be suitable to transfer heat into the pipes used for ground source heat pumps. Hard rocky ground isn't as efficient but still works well. Wet soil type ground or free flowing water works extremely efficiently as the moisture conducts heat freely to the looped collectors.

Underfloor heating will ideally be used throughout the house and pipe centres will need to be slightly shorter to keep the efficiency of the ground source heat pump high. Radiators can be used upstairs but the CoP will reduce.

For installations over 12kw, Ground Source Heat Pumps installed by Solo Heating Installations will require a 3-phase electrical supply. Below 12kw will only require a normal single phase supply as the NIBE units installed by Solo use soft start mechanisms.

When used to heat hot water, a thermal store will need to be installed. If you are only supplying the heating through the ground source heat pump, a buffer tank will be installed.


 

 

NIBE 1140 Ground Source Heat Pumps

NIBE Ground Source Heat Pumps

Your energy consumption for heating will be lowered by up to 75% with the use of NIBE ground source heat pumps.

NIBE produce 15 different types of Ground Source Heat Pumps, ranging from 5kW to 40kW. By using a cascade connection it is possible to achieve an output of 360kW. The heat pump will be sized exactly to the heating requirement for your home; which will ensure no startup cycling during its operational life.

The energy consumption for heating and hot water can be lowered by up to 75% in comparison to heating systems using fossil fuels.

NIBE FIGHTER 1140 is a ground source heat pump for heating small and large houses and industrial buildings.

NIBE FIGHTER 1140 ground source heat pumps are equipped with a control panel that offers plenty of functions.

- Large control panel on the front of the unit for ease of use by the end user.

- Double heat curves which increases the efficiency of the unit, compared to other available models.

- Outdoor weather compensation control allows a total energy efficient running cycle. The unit adjusts its output compared to the outside temperature; this ensures the most economical operation of the heat pump throughout the year.

- Soft start fitted to all heat pumps as standard. This ensures on startup, the current drawn form the electrical supply doesn't affect the rest of the property.

 

Technical Data Sheet - 1140 Ground Source Heat Pump

Technical Data Sheet Download - 1140 Ground Source Heat Pump

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Ground Source Heat Pump Leaflet Download 1140 Ground Heat Pump Technical Information

1140 Ground Source Heat Pump

 

 

NIBE 1240 Ground Source Heat Pumps


NIBE 1240 Ground Source Heat PumpThe NIBE 1240 ground source heat pump system is suitable for small or medium sized family homes, with average demands for hot water.

They come with an inbuilt hot water heating system and electric immersion heater backup. The tank in tank heating system for hot water ensures the entire 160 litre hot water tank comes to temperature in the fastest time, and by mixing the hot water down to useable temperatures through a blending valve, the actual useable storage volume increases significantly.

- Features an in built hot water cylinder, which is capable of proving hot water for most 3 to 4 bedroom homes.

- The unit can be connected to two different heating temperature zones. This would include a radiator system and underfloor heating circuit.

- In-built immersion heaters come on automatically under extreme loading conditions. These are pre programmed to work with the ground source heat pump in the most efficient and economical way.

 

Technical Data Sheet - 1240 Ground Source Heat Pump

Technical Data Sheet Download - 1240 Ground Source Heat Pump

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Ground Source Heat Pump Leaflet Download Ground Source Heat Pump Overview 1240 Ground Heat Pump Technical Information

1240 Ground Source Heat Pump

 

 

Upgrades to NIBE 1140, 1240 and 1330 Heat Pumps


NIBE 30/40 FLM Exhaust Air Module - NIBE Ground Source Heat PumpsNIBE Exhaust Air Module For Ground Source Heat Pump

This unit is the ideal solution in new buildings to meet the energy savings directive, and renovated buildings to eliminate issues with ventilation. It combines heat recovery ventilation with the ground source heat pump unit to increase the total system efficiency, and ventilate the stale air areas of your home. Air is extracted from the bathrooms, kitchen and even pool areas; this air is taken back to the air module where the energy is extracted. This energy is then given directly to the incoming brine from the ground loops, thus increasing the incoming temperature and the systems efficiency.



NIBE 10/20 PKM Passive Cooling Module - NIBE Ground Source Heat PumpsNIBE PKM Module for Ground Source Heat Pump

The PKM unit will allow free cooling of a property over a suitable surface area. Heat will be taken from a space through underfloor heating or fancoils to actively cool an area down in the summer. The unit can actively cool a house down whilst still providing hot water supplies through a separate heating coil.



NIBE HPAC Cooling/Heating System - NIBE Ground Source Heat PumpsNIBE HPAC Cooling System For Ground Source Heat Pump

The HPAC unit will turn a NIBE 1140 / 1240 and 1330 ground source heat pump into a complete climate controlled system. Heat energy will be taken from rooms during the summer through the underfloor heating system. This energy is transferred through the ground coils into the earths soil. This charging effect during the year increases the systems efficiency during the winter as the stored energy in the ground is taken for use. Solo Heating Installations would recommend this upgrade for large houses or large surface area rooms in conjunction with underfloor heating.



Swimming Pool Heating with Ground Source Heat PumpNIBE POOL 11 Kit for Swimming Pool Connection to Ground Source Heat Pump

It is possible to dock and heat a swimming pool with a ground source heat pump. Swimming pools can be costly to heat throughout the year, and ground source units will reduce costs significantly. Depending on different factors, such as whether the pool is covered or in a heated building, we will work out the heat load requirements for the pool. The pool heating requirements are then taken into account when designing and sizing the ground source heat pump. The control and heating of a swimming pool with a ground source heat pump will require some upgrades to the GSHP unit itself. These are added at the factory on placing the order.

 

Solar Thermal Panels with a Ground Source Heat PumpSolar Panel Docking to Ground Source Heat Pump

Solar thermal panels can be docked with ground source heat pump systems. The hot water cylinder will need to be upgraded with a separate solar coil, which allows a sealed solar panel system with its own specialist antifreeze. NIBE provide a solar coil cylinder, which holds a total hot water volume of 300 litres, and an outer jacket volume of 450 litres. This allows safe docking and efficient operation of multiple panels, giving large amounts of hot water throughout the year. A full solar panel suitability assessment will be completed at the design stage, as some smaller properties would not greatly benefit from solar panel upgrades.

 

Exhaust Air Heat Pump Docking to Ground Source Heat PumpsExhaust Air Heat Pump Docking To Ground Source Heat Pump

Ground source heat pumps can even be docked to exhaust air heat pump units. The exhaust air heat pump will extract stale air, and transfer its energy through heat pump technology to its own hot water heating system. The ground source heat pump is therefore used to provide space heating through the use of underfloor heating or radiators. If the exhaust air heat pump cannot cope with the demand for hot water, the ground source heat pump gives an extra boost energy. These systems will provide a fully ventilated and heated property, and have extremely low annual running costs.

 

 

Solo Heating Installations recommend NIBE Ground Source Heat Pumps.

Visit their site for more details

NIBE Ground Source Heat Pumps

NIBE Ground Source Heat Pump Accreditation

38 Racefield Close, Shorne, Gravesend, Kent, DA12 3EL Tel: 01474 822 701 E-mail: info@soloheatinginstallations.co.uk............
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Send us your plans for a free estimate. Low Con Buildings Programme NIBE Ground Source Heat Pump Brochure