Buildingphysics.com

Software for heat transfer and ground heat

EED - Earth Energy Designer

·  Support also available in German

Current version 3.15           Please see this link for update info for EED 3

Demo version: Click here to download the demo version  (new version 3.15, Oct 15, 2009)

Click here for some EED screen shots

 

· Manual (PDF), 1,6 MB, 60 pages, revised May 26, 2008

 

· Documentation and frequently asked questions (FAQ:s)

 

 

The main new features of EED 3:

 

· Optimization module that gives a list of best solutions for various parameters within specified ranges

· Simple cost calculation

· British units added. Easy conversion between SI and British units

· Pc-program multilingual. Now available in:  English, French, German, Hungarian, Italian, Spanish (Castilian), Catalan, Swedish, Turkish, Portuguese, Polish, Dutch, Greek, Bulgarian, Romanian, Czech, Chinese (simplified), Russian, Japanese, Serbian (Latin+Cyrillic), Hebrew, Basque.  New languages can be added.

· More configurations with large systems (798 as compared with 308 in EED 2.0). Systems with up to 1200 boreholes can be analyzed!

· More G-functions (6385 as compared with 2465 in EED 2.0)

· Improved accuracy (multipoles 1->10). Improved convergence on borehole length.

· Hot water treated separately

· Flow rate can be given for whole system

· A lot of smaller improvements

 

 

Training

· 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.

· Energi- och Miljötekniska Föreningen (Sweden) uses EED in their course ”Bergvärme och bergkyla”. Please see their course calender.

Help needed for translation into other languages

We offer a free license of EED 3 if you make a valid translation into a new language.
If you wish to contribute, please contact us first in case of that no other is currently working on it. See link supported languages
 

Older versions

Version 2.0

· Manual (PDF), 360 kB, 43 pages, revised October 30, 2000

Overview

EED is a PC-program for 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.

Developers:

· 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

 

Now available in 23 languages!