EED – Earth Energy Designer
EED is a PC-program for vertical borehole heat exchanger design. Its easy of use, short learning curve, quick calculation times and inherent databases make EED a useful tool in everyday engineering work for design of ground source heat pump system (GSHP) and borehole thermal storage. In very large and complex tasks EED allows for retrieving the approximate required borehole size and layout before initiating more detailed analyses. Even for very small plants it is worthwhile using EED instead of rules of thumb. EED handles configurations from one borehole to large systems with up to 1200 boreholes. Annual base loads may vary between a few MWh up to several TWh!
In ground source heat pump system, heat is extracted from the fluid in the ground connection by a geothermal heat pump and distributed to the building. The fluid is then re-warmed as it flows through the ground. In cooling mode, the process is reversed. This is a renewable, environmentally friendly energy source. This sustainable technique can be used for cooling and heating of houses, cooling of telecommunication switchboards, etc.
EED is based on parameter studies with a numerical simulation model (SBM) resulting in analytical solutions of the heat flow with several combinations for the borehole pattern and geometry (g-functions). Those g-functions depend on the spacing between the boreholes at the ground surface and the borehole depth. In case of graded boreholes there is also a dependency on the tilt angle. The g-function values obtained from the numerical simulations have been stored in a data file, which is accessed for rapid retrieval of data by EED.
Calculation of brine temperatures is done for monthly heat/cool loads. Databases provide the key ground parameters (thermal conductivity and specific heat) as well as properties of pipe materials and heat carrier fluids. The monthly average heating and cooling loads are the input data. different methods of establishing a monthly load profile. A printed output report and output graphical processing are provided.
The program has an easy-to-use interface. The borehole thermal resistance is calculated in the program, using the borehole geometry, grouting material, pipe material and geometry. The borehole pattern may be chosen at will from a database of 800 basic configurations.
The main new features of EED 4:
- EED now calculates the response due to any hourly load variation. This means that it handles any loads for cooling, heating, and DHW (Domestic Hot Water), with a resolution of one hour. It is quite easy to open an old v3 project and assign any hourly data for any load to investigate the effect of base or peak loads.
- EED v4 uses fast multi-core cpu computation. EED can even use the GPU (graphics processing unit) to speed up calculations, e.g. it is possible to solve for 100 years of hourly data in just 4 seconds on a $300 graphics card (Radeon RX 480).
- EED v4 is more than 50 times faster than EED v3. An optimization that took a few minutes on EED v3 only takes a few seconds using EED v4 for monthly load values.
- EED v4 will also find more solutions (especially for cases with cooling loads) compared to v3 for the optimization
- A lot of smaller improvements.
- The user interface now supports 34 languages: English, Arabic, Basque, Bulgarian, Catalan, Chinese (simple), Czech, Danish, Dutch, Estonian, Farsi, Finnish, French, German, Greek, Hebrew, Hungarian, Italian, Japanese, Korean, Latvian, Lithuanian, Polish, Portuguese, Romanian, Russian, Serbian (Serbian Latin), Cyrillic (Serbian Cyrillic), Slovene, Slovak, Spanish, Swedish, Turkish, Vietnamese
- Dr. Thomas Blomberg, Blocon
- Prof. Johan Claesson, Dept. of Building Physics, Chalmers University, Sweden
- Dr. Per Eskilson, Dept. of Mathematical Physics, Lund University, Sweden
- Prof. Göran Hellström, Dept. of Mathematical Physics, Lund University, Sweden
- Dr. Burkhard Sanner, Germany
EED ScreenshotsScreenshot of the optimization list in English.
Screenshot of the optimization list in German.
Main menu in Greek.
The following documents may also be of some assistance:
- Notes from Geotrainet Course in 2016 showing some test cases with comparisons to measured data
- Explanation to SPF in EED
- A “textbook”-file from the international summer school in 2001
- One of the papers cited in the manual from 1997 with conclusions of EED
- A general paper on GSHP from 2003, with reference to EED
- Paper that presents the first version of EED 1994
- Eskilson Ph.D.Thesis (1987).pdf
- Hellström Ph.D. Thesis (1991).pdf
- 1999 Abbas and Sanner egc 1999 – UTES Gizeh.pdf
- 1999 Sanner et al ISS Klamath Falls – PC models.pdf
- 2000 Mands etal dgk 2000 – DFS Langen.pdf
- 2008 Sauer etal dgk 2008 – auslegung.pdf
- 2000 Sanner etal dgk 2000 – TRT.pdf
- 2012 Fernandez etal innostock – IKEA.pdf
- 2012 Sanner etal JSE oradea – GSHP.pdf
- 2013 Bohne etal egc 2013 – thermo.pdf
- 2013 Mands etal egc 2013 – industry .pdf
- 2016 Sanner etal egc 2016 – geobuild1.pdf
- 2019 Urchueguia-Sanner et al egc 2019 – Geocond.pdf
- 2019 Kühl et al egc 2019 – Geobase.pdf
- 2019 Perego et al egc 2019 – Mapping in CheapGSHPa.pdf
- Extreme calculation performance. We use very powerful cpu:s and gpu:s allowing quick simulations and optimizations for both monthly and hourly values for loads.
- You dont have to install/update EED. It has always the latest version.
- Access it from anywhere via a web browser on your PC, Mac, IPad, IPhone, smartphones, tablets, TV:s, etc.
- Share your project files on the server with colleagues. There can even be simultaneous concurrent users accessing the server.
- Easy to use. Access it from anywhere.
- Extreme calculation performance. We use powerful cpu/gpu:s allowing quick simulations and optimizations for both monthly and hourly values for loads. A monthly calculation for 25 years takes typically 0.02 seconds, and an hourly calculation for 25 years only about one second!
- Run multiple batch jobs allowing e.g. parameter studies.
- Allows for integration development to be used with other software within building simulation such as TRNSYS, EnergyPlus, DesignBuilder and OpenStudio (based on EnergyPlus), and other software that needs a Ground Source Heat Pump (GSHP) module.
- Geotrainet uses EED in their courses ”Training for designers” on several locations in Europe. Please see their course calender.
- Holymoor Consultancy Ltd (UK) offers courses and training in EED. Please see their course calendar for “open” courses, or contact Holymoor Consultancy directly for bespoke internal training.
- Courses (usually in Swedish) given by www.geoenergicentrum.se and www.emtf.se.