Hi Bernd,
the dielectric energy is Ediel = 1/2 f(eps) q * phi(sol)
with:
f(eps) = (eps-1)/(eps+0.5)
eps = dielectric constant
q = vector of screening charges on the segments
phi(sol) = vector of solute potential on the segments
* = dot product
this can be written as:
Ediel = -1/2 f(eps) q A q
with:
A = coulomb matrix of the charge-charge (screening charges on the segments) interactions.
So, if you like to get something like q A q or 1/2 q A q, the value can be easily calculated form Ediel.
You can find a few more more formulae at:
page 134
http://zam581.zam.kfa-juelich.de/nic-series/volume25/nic-series-band25.pdfHope this helps,
Michael