We have published new booklet "The Heat Pump Guide 2008" which cover greater details about heat pump technology, please click here to open the PDF booklet.

Ground Source Heat Pump

Ground source heat pumps (GSHPs) are electrically powered systems that tap the energy of the greatest solar collector in existence: the earth formation!

The earth surface formation absorbs almost 50% of all solar energy (from the Sun) and at certain depth has a nearly constant temperature for all season. The GSHP system is a best technology that taps this energy to provide heating, cooling, and hot water for any type of homes and commercial buildings.

When operating in heating mode, it transfers the heat from a ground source into a building (Fig 1).

 Fig-1

The above operation has the following sequence:

(a) Free heat is absorbed into water within buried pipe network. The temperature is about 10°C.

(b) The heat pump use a small electricity to process heat from the ground pipe to provide heated water of

      temperature between 40°C- 60°C.

(c) The heated water is then dispensed into underfloor heating which keep building warm. It can supply hot

     water for bathroom or kitchen.

When operating in cooling mode, the process is reversed, transferring heat within the building into ground formation.

What is basic component of the GSHP system?

The system contains three components:

(a) Ground Source Pipes network, buried under the ground.

(b) Heat Pump that does all the works. It about a size of washing machine or tall fridge/freezer unit

     depending on configuration (as the picture shown below).

(c) Heating system based on under floor heating or HVAC system with an optional hot water storage tank.

The heat pump can be fitted in kitchen, garage, large cupboard or under floor basement.

GSHP system versa other heating solution

The GSHP requires small electricity to operate the heat pump system, however, as the Fig 3 shown below, the GSHP offer lowest monthly bill. In addition, the greenhouse gas emission (CO2) in Fig 4 makes the GSHP a most environmental friendly.

 Fig-3                                                                                   Fig-4

How the GSHP system reduce my energy bills?

As an illustration, consider a building with two different heating installations (assuming freezing winter):

Case (a) plug in electric heater system (common practice in most Bulgaria housing)

• Last month, you receives electricity bill €200
• Suppose that electricity tariff goes up by 20%
• The next month electricity becomes €240, a €40 price increase

Case (b) GSHP with under floor heating system

• Last month, you receives electricity bill €50 (4 time less electricity than above)
• Suppose that electricity tariff goes up by 20%
• The next month electricity becomes €60, a €10 price increase

As the case presented here, the absolute increase of the energy bill is considerably smaller than the case (a). This represent a significant saving in term of relative cost of lifestyle living.  Because of this, you’ll have more financial freedom as well as lesser impact on your budget as the fossil fuel tariff continues to rise further. Try compares the difference assuming the tariff goes up by 50%....you shall see, it has a very big impact!

List of benefit of our GSHP technology

Significantly cheaper energy bills !   Geoearth energy is free, it requires small electricity to operate them.   Lowest greenhouse gas emission than any other type of fossil fuel heating system.   Less pollution hence environmental friendly.   No gas pipeline needed hence improved safety; reduce risk of gas related fires.   Less hassle with fossil fuels delivery (ie oils, coal, propane).   Quite operation, comfortable, safe & reliable operation.   Improve investment returns as the buyer is more attracted to energy efficient building.   We are professional company with emphasis toward high quality job and client satisfaction

What is the installation cost?

Due to diversity of the house design, plot size and type of ground formation as well as design of the central heating installation and hot water supply, you be surprise it not expensive as you may think.

For new house, we requires the following documents or details:-

(a) Geologist report, which provide us some information about soil formation to determine most economical

      solution for ground pipe network.

(b) Architect drawing of the house, which address the installation of the heat pump equipment and

      central heating system. The drawing should includes detail of installation layer.

(c) Choice of central heating system:- underfloor, fan-coils heater or HVAC (air ducts). We can offer

      professional advice on such a diverse subject.

And we make a preliminary offer without obligation. Upon acceptance and an initial deposit, we formalize the project into detailed reports and drawing along with a formal offer.

For those seeking to upgrade existing building with GSHP, we recommend applying for energy audit assessment before we consider preliminary offer.

Ground Pipe Network

Ground pipe network as shown below is designed to transfer heat between soil formations and the GSHP, there are various methods of transferring heat depending on a type of ground formation, a size of the plots and the installation cost.

Below picture illustrates three different ground loop networks:-

• Red line are horizontal loop and it the most popular with building plot with large surface area.
• Blue line are vertical loop and is suitable for building plot with smaller land such as city region.
• Black line are referred as open loop as it rely on submersion pump to transfer water into heat pump and dispose it at the other well. This configuration is popular as long the water table is sufficiently close to surface.

Well design ground pipe network is critical to ensure it has proper capacity to cope with heat transfer operation regardless to any season. We take great cares to ensure ground pipe network complies to the installation guideline based on ISGHPA and ASHRAE.

Prokoncept building technology can reduce installation cost!

Prokoncept building technology has a superior insulation performance than any type of traditional building technology. In other word, they reduces heat losses as well as retaining heat longer within a building. Of this, they reduces the heating demand from the central heating/cooling system. This mean that a GSHP installation and heating installation can be downsized.

With combination of downsizing measure, the overall installation cost reduces a potential saving of several hundreds euros. This also mean, the ground pipe network can now be smaller, easier to fits into smaller plot of land.

This is the reason why we encourage proprietor to incorporates energy efficient design when considering new construction project. In this way, the combination of Prokoncept and GSHP system would be a step closer towards eco-home and consequently becoming a greenest building in Bulgaria!.

Prokoncept building technology is a proven technology around the world and it becoming more popular as it being recognized as most cost effective way to comply energy efficiency regulation.

For more details about Prokoncept, please visit our website:

GSHP versa Solar Heating for Central Heating/Cooling System

The heating capacity of the solar thermal is much less than the GSHP and may not always provide sufficient heating during winter season. For an economic reason, solar thermal system work best for hot water supply and swimming pool heating. During winter, the solar energy from the sun is roughly 2-3 time less than summer season.

Earth formation contains near infinite thermal energy, hence with proper ground pipe network design, the heat energy can be extracted by GSHP system and provide you all the heating needs for the central heating system, hot water supply or swimming pool regardless to season.

Our service

We're a specialist company for Ground Source Heat Pump system for any type of building, from residential home to commercial building and industrial system. We offer full heating architect project and installation service.

We cherry picks best quality GSHP equipment made from Germany and Canada.

	Viessmann is a first class heat pump system which come with 3 year warranty. Because of demanding installation specification, EnergyFree Technology is a certified installer of the Viessmann heat pump. The proprietor will benefit very low maintenance quite and reliable operation
	Nordic heat pumps are manufactured from Canadian, with reputation for low cost, high quality heat pumps with build in heating and cooling flexibility. We're exclusive dealer for the Bulgaria region, where we market Nordic heat pump range for competence engineer.

Installation Picture for Residential Home

Nordic:

Viessmann:

Installation Picture for Commerial or Industrial Building

Nordic:

Viessmann:

Because of demanding expectation of equipment long lifetime operation, we recommends investing Oventrop plumbing components which are manufcatured from Germany.

For new construction projects or existing building upgrades, please feel free to contact us for professional consultation.

We build on our reputation by our high professionism standard and our service with clients. We offer support for post installation maintenance service and competence advice if you have an issue with the system.

We're member of American Society Heating Refrigerating Air-Conditioning Engineer (ASHRAE) and International Ground Source Heat Pump Association (IGSHPA), you can trust us of our technical expertise when it come to a state of the art heating technology.

For more information

Heating configuration: Underfloor heating
Heating / cooling configuration: HVAC (air ducts)
Swimming pool heating
Energy Audit Assessment
Heat Pump Guideline Manual 2008
Industrial Grade, Heavy Duty, Nordic Heat Pump Range, click here

"The earth has music for those who listen."..... William Shakespeare.