Civil Engineering Reference
In-Depth Information
Table 8 Set of potential structural models
System feature and feature
'
s alternatives
Number of the structural model
1234567
Structuring
strategy
Prime mover
Stirling engine
X
X
X
X
X
X
X
Additional
sources
PVpanels (K
PV
) X
−−
XXX
−
ST panels (K
ST
) XX
−−−
X
−
Boiler with
pellets
XXXXXX
−
Boiler with gas
−−−−−−
X
Storages
Power storage
X
X
X
X
X
X
X
Heat storage
X
X
X
X
X
X
X
Consumers
MCC
−−−−
XX
−
TCC
X
X
X
X
−−
X
Integration
strategy
Electric grid
Off-grid
X
X
X
X
X
X
−
On-grid
−−−−−−
X
Thermal grid
Off-grid
X
X
X
X
X
X
−
On-grid
−−−−−−
X
Gas grid
Off-grid
−−−−−−
X
On-grid
X
X
X
X
X
X
−
4.2 Identifying the Set of Potential Structural Models
For a given general structural model, establishing the potential structural models
depends on the strategy of system structuring and integration.
Strategy of system structuring refers to the type of the components embedded.
Here will be considered only Stirling engine as CHP unit, PV panels, ST panels,
boilers, electrical batteries, hot water tank, and two types of chiller, namely with
mechanical compression and with thermal compression.
Strategy of system integration in its energetic environment refers to the system
s
ability for connecting to the existing energy networks, as well as to the primary
energy resources. Depending on the fact that the system receives or supplies
energy from or to the energy grids, a large number of cases can occur. Of these,
two are typical, and will be considered. These are the off-grid strategy to which
between system and grids there is no transfer of energy, and the on grid strategy
to which the electricity can be transferred from the system to the network, and
vice versa. As regards the primary energy resources, here will consider that only
the solar radiation, gas, and wood pellets are available.
'
For example, Tab. 8 presents a set of potential structural models, which was
established on the basis of the above.
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