Global power balance equation for electrons author: P B Lloyd, CCFE, Culham Science Centre args : output structure : residual error; constraint value; residual error in physical units; output string; units string Global power balance equation for electrons This is a consistency equation N.B. This constraint is currently NOT RECOMMENDED for use. #=# physics #=#=# consistency and hence also optional here. Logic change during pre-factoring: err, symbol, units will be assigned only if present. iradloss : input integer : switch for radiation loss term usage in power balance (see User Guide):
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| real(kind=dp), | intent(out) | :: | tmp_cc | |||
| real(kind=dp), | intent(out) | :: | tmp_con | |||
| real(kind=dp), | intent(out) | :: | tmp_err | |||
| character(len=1), | intent(out) | :: | tmp_symbol | |||
| character(len=10), | intent(out) | :: | tmp_units |
subroutine constraint_eqn_004(tmp_cc, tmp_con, tmp_err, tmp_symbol, tmp_units)
!! Global power balance equation for electrons
!! author: P B Lloyd, CCFE, Culham Science Centre
!! args : output structure : residual error; constraint value;
!! residual error in physical units; output string; units string
!! Global power balance equation for electrons
!! This is a consistency equation
!! N.B. This constraint is currently NOT RECOMMENDED for use.
!! #=# physics
!! #=#=# consistency
!! and hence also optional here.
!! Logic change during pre-factoring: err, symbol, units will be assigned only if present.
!! iradloss : input integer : switch for radiation loss term usage in power balance (see User Guide):<UL>
!! <LI> = 0 total power lost is scaling power plus radiation (needed for ipedestal=2,3)
!! <LI> = 1 total power lost is scaling power plus core radiation only
!! <LI> = 2 total power lost is scaling power only, with no additional
!! allowance for radiation. This is not recommended for power plant models.</UL>
!! ignite : input integer : switch for ignition assumption:<UL>
!! <LI> = 0 do not assume plasma ignition;
!! <LI> = 1 assume ignited (but include auxiliary power in costs)</UL>
!! ptrepv : input real : electron transport power per volume (MW/m3)
!! pradpv : input real : total radiation power per volume (MW/m3)
!! pcoreradpv : input real : total core radiation power per volume (MW/m3)
!! f_alpha_plasma : input real : fraction of alpha power deposited in plasma
!! alpha_power_electron_density : input real : alpha power per volume to electrons (MW/m3)
!! piepv : input real : ion/electron equilibration power per volume (MW/m3)
!! pinjemw : input real : auxiliary injected power to electrons (MW)
!! plasma_volume : input real : plasma volume (m3)
use physics_variables, only: iradloss, ignite, ptrepv, pcoreradpv, f_alpha_plasma, &
alpha_power_electron_density, piepv, plasma_volume, pradpv
use current_drive_variables, only: pinjemw
implicit none
real(dp), intent(out) :: tmp_cc
real(dp), intent(out) :: tmp_con
real(dp), intent(out) :: tmp_err
character(len=1), intent(out) :: tmp_symbol
character(len=10), intent(out) :: tmp_units
! pscaling : Local real : total transport power per volume (MW/m3)
real(dp) :: pscaling
real(dp) :: pnumerator, pdenom
pscaling = ptrepv
! Total power lost is scaling power plus radiation:
if (iradloss == 0) then
pnumerator = pscaling + pradpv
else if (iradloss == 1) then
pnumerator = pscaling + pcoreradpv
else
pnumerator = pscaling
end if
! if plasma not ignited include injected power
if (ignite == 0) then
pdenom = f_alpha_plasma*alpha_power_electron_density + piepv + pinjemw/plasma_volume
else
! if plasma ignited
pdenom = f_alpha_plasma*alpha_power_electron_density + piepv
end if
tmp_cc = 1.0D0 - pnumerator / pdenom
tmp_con = pdenom * (1.0D0 - tmp_cc)
tmp_err = pdenom * tmp_cc
tmp_symbol = '='
tmp_units = 'MW/m3'
end subroutine constraint_eqn_004