EWS - Program for Borehole Heat Exchangers
Download
To the download page: EWS
Description of the program
The program calculates the outlet and inlet temperatures as well as the heat extraction rate of the boreholes (single boreholes or fields of boreholes) with hourly time steps up to a period of 200 years. The program EWS allows to take into account all major impacts. The ground can be divided into maximal 10 layers with different types of ground materials and the corresponding properties. Since the program EWS is able to do unsteady calculations of the fluid, it offers the possibility to calculate “start-up processes” and “thermal response tests”. It is also possible to calculate the necessary borehole length according to the Swiss norm SIA 384/6.
Furthermore, the full extension of the program EWS is able to calculate direct cooling systems with borehole heat exchangers, where the boreholes can be placed in random arrangements direct on the screen. Based on the return temperature of the cooling system of the building (TABS, cooling ceiling and ventilation), it is possible to simulate an hydraulic linking of the borehole heat exchanger with the ventilation or the hydraulic cooling system. Even simulations with complex ventilation schedules are feasible. Outdoor air temperatures can be read from a meteorological data base (e.g. Meteonorm) in hourly time steps.
A detailed user manual can be read here.
Input sheet for the calculation of boreholes in the basic version of the program EWS
Borehole heat exchangers are calculated in hourely time steps.
It is easy to define the borehole configuration in the full version of the program just by clicking with the mouse button on the screen. A background map can also be inserted and scaled.
The program EWS ist running on PCs with Windows 7, Windows 8, Windows 10 and Windows 11. It needs no installation and can be copied in every folder whith access write permission. The acquisition of a program license authorizes to the installation of the program EWS on one computer of the client (but not in the directory "c:\Program Files" or "c:\Program Files (x86)", as the user only has reduced permissions for this)
The purchase of a program license entitles the customer to install the EWS program on a single workstation computer. If the computer is used exclusively by one person, the license can also be installed on a second workstation (e.g. laptop or home PC) at no extra charge. When purchasing a replacement PC, a third license number can also be requested for a transfer fee of CHF 320 + VAT.
The program is only available as a download, there is no physical delivery. With a license, the program may be used on one PC for an unlimited period of time.
There is a free trial version of the program EWS. It can be downloaded here. To use the trial version, just use the license number "4701" and the user name "Probeversion". The trial version can be changed to a full running version later on simply by changing the license number. The program can be ordered by email. The program costs Fr. 1'500.- (+ VAT) in the basic version, Fr. 3'500.- (+ VAT) in the full version and Fr. 4'500.- (+ VAT) in the professional version.
Overview versions
| Basic version | Full version | Pro version | |
|---|---|---|---|
| Maximum number of borehole heat exchangers | 150 | 150 | 600 |
| Maximum simulation time | 200 Jahre | 200 Jahre | 200 Jahre |
| Product-specific values of the borehole heat exchangers
Access to database with numerous specifications from the manufacturers of borehole heat exchangers. |
x | x | x |
| Display of temperature curve over 1 year | x | x | x |
| Up to 10 soil layers with different material values | x | x | x |
| Direct cooling and heating without heat pump
Geothermal borehole heat exchangers connected directly to TABS or ventilation system, without heat pump. Ventilation schedule, heat exchanger and intermediate circuit integrated. |
x | x | |
| Heat extraction input via sheet "Load profile"
Automatic conversion of the heating and cooling demand of the building into the borehole heat extraction by using heat pump COPs etc. |
x | x | |
| Calculation of the pressure loss in the borehole circuit | x | x | |
| Free arrangement of the borehole heat exchangers
The borehole heat exchangers can be placed freely on a stored plan (without predefined distances/patterns). |
x | x | |
| Report Automatic creation of a short report with the most important boundary conditions and results |
x | x | |
| Sample library with the option to change the boundary conditions
Examples 1 - 6 of geothermal borehole heat exchangers for heating and cooling, including freecooling and solar regeneration. |
x | x | |
| Sample library with the option to change the boundary conditions
Examples 7 - 10 of geothermal borehole heat exchangers for heating and cooling, including anergy networks, groundwater influence, energy piles and outside air heat exchangers for the regeneration of the boreholes. |
x | ||
| Consideration of neighboring boreholes Neighboring boreholes can be placed in the plan and taken into account in the calculation in a simplified manner. |
x | ||
| Graphic display of the soil temperature on the plan | x | ||
| Integration of solar collectors into the borehole circuit | x | ||
| Taking the groundwater flow into account | x | ||
| Calculation of embedded piles with surface influence | x | ||
| Outside air heat exchangers for the regeneration of the boreholes | x |