Civil Engineering Reference
In-Depth Information
2.1 Building the Functional Schemes
The energetic
fluxes in the mCCHP system imply generation, transport, and storage
of energy. Each of these processes presupposes the manipulation of certain quan-
tities of energy. The energy
“
”
carriers
may be fuels, thermal agents (usually
fluids
like water or air), or electrons, depending on the type of energy
—
thermal or electric.
(which is the concrete form by means of which
the energetic fluxes are achieved) presupposes the existence of a number of comple-
mentary components, which facilitate this circulation. The transport of pellets, the
water recirculation pumps, the ventilators, the fuel-power-heat- and cold storages and
the heat exchangers may be considered as examples of complementary components.
As available on the market, the main components of the system incorporate part
of the complementary components and that is why they are already included in the
structural model of the system. The rest of the complementary components need to
be added. Thus, the structural model of the system becomes the functional scheme,
which may then be used in the dimensioning of all the components, this way
obtaining the functional model of the system.
To exemplify, let us consider the structural models presented in Sect. 7.4 in
Chap.
The circulation of these
“
carriers
”
. With part of them, the chiller
is a mechanical compression one, and with the other part, it is thermally activated.
For the structural models with thermally activated chiller was built the global
functional scheme presented in Fig.
1
.
“
”
Electricity
Battery
Hot
water
CHP
unit
Heat
P1
P9
P4
Cold
water
P6
Solar thermal
panels
Chiller
Cold
P7
P10
P11
P2
P5
P8
Aditional
Boiler
P3
Heat
exchanger
Heat
storage
Cold
storage
Consumptions
Cooling
Production
Fig. 1 Global functional scheme for a mCCHP system with a thermally compression chiller
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