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Zawartość zarchiwizowana w dniu 2022-12-27

GEOTHERMAL ENERGY USE FOR HEATING AND ANTI-SNOW, ICE AND FOG FUNCTIONS AT FORLANINI AIRPORT IN MILANO LINATE

Cel

The primary objects were to verify the feasibility of the following plant realizations :
- airport district heating
- heating of aircraft parking squares with anti-snow and anti-freeze
functions
- heating of the runway with fog dissipation functions.
This research holds an interdisciplinary peculiarity and allows to supply a reference instrument in order to optimise an atypical energetic structure as the one represented by the Forlanini airport in Milano Linate.
Minerary searches executed by AGIP in the area of Segrate, Lambrate, S. Bovio and Metanopoli gave us the chance to rebuild the subsoil stratigraphic succession of the area under examination.
It consists of a soils exclusively clastic group (clays, sands, gravels) which have, for the knowing part, that is to the depth of 2,505 m (well Matanopoli 1), an age between the Middle Miocene (Tortoniano) and Quaternary.
In particular were examined three depth-levels for the water-bearing analysis :
1st Level (superficial = up to 300 m depth).
2nd Level (intermediate = 800-950 m depth).
3th Level (deep = 1,800-2,200 m depth). There is a presence of the "Sergnano gravel", distinguished by a salad stratum variable temperature (on the increase with the depth) in the order of 50-60 deg. C.
The deep water-bearing it is identified by formation "Gravel of Sergnano" of the Messinian Age (Miocene Superior). It is separated by water-bearing complexes, above which lies a powerful Pliocene clay nape, known as Santerno clays.
The capacity of the deep productive wells has been foreseen of 125 m3/h.
The determined area for the location of the well is neighbouring to the airport building structures in their north-east part.
The capacity of the deep productive wells has been foreseen of 125 m3/h.
ENERGY SAVING BY GEOTHERMAL DISTRICT HEATING
The total TOE "consumed" during a year through the conventional system amount to 7,857.
The annual energy savings using geothermal district heating is about 1570 TOE/year and the ones actualized during 25 years, obtainable through the suggested plant is about 21680 TOE.
These annual savings are calculated as the difference between the reference consumptions and the specific consumptions of the single plant events.
The energy savings in percentage terms in relation to the actual reference consumptions is about 20%.
SPERIMENTAL PLANT
Using the pilot plant, prepared nearby the airport control tower during the 27 months of study, we have collected thesperimental data, both operating data and those relative to the microclimate inducible in places. Such variations have been generated heating artificially the air stratum next to the ground. This heating has had the function to prime convective movements of overhanging air, to permit the determination of the "lifting" in vertical sense of the fog stratum.
From the surveyed data it was possible to establish that the local thermic gradient can be modified, with utilization of subsoil energy sources down to a of 12-15 meters.
It has been studied the technical feasibility to exploit the geothermal energy plants not only to fulfil the existing airport uses but even to heat the new airplanes parking squares for the dissolution of a possible sheet of snow without recoursing to a mechanical and/or chemical removal. Finally thanks to the realization of new plants it has been verified the possibility to interfere artificially on the local microclimate with thermal requests in order to dissipate the presence of fog-banks typical of the airport area in winter period.
Parallelly it has been proceeded with the support of both experimentation and modelling. In synthesis, the analized plant is reproduced below :
- heat production system is constituted by a single new pole of production placed in a barycentre zone compared to the uses of the greatest thermal request actually supplied by the thermal station 1 and 2;
- heat distribution system is constituted by a net in pre-insulated double pipeline which interconnects the new structure with the two existing thermal stations, which already benefit by their own heat distribution networks.
Similar distributive systems interconnect the new station to the modulus for the artificial heating of airplanes parking squares and to the modulus for the fog dissolution.
The following thematic monographies have been realized to complete the board of necessary information for the correct development of the problem :
- evaluation of geothermal and hydrogeological resources of the area;
- analysis of the local meteorological/climatic parameters and of the micro alterations artificially inducible;
- development of a mathematical modelling for the numerical simulation, through computers, of the local micro-climate evolutions and of its thermo-inducible modifications;
- hystorical and evolutive collection of the traffics in Forlanini airport relating the annulments of flights and/or their changing of course for meteorological grounds;
- analysis of the environmental impact connected with geothermal fluid utilization to reach energetic aims in airport limits;
- interdisciplinary biographical datum-bank relating the Linate project.

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LOMBARDIA RISORSE SPA
Wkład UE
Brak danych
Adres
VIA DANTE 12
20121 Milano
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