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Contenuto archiviato il 2022-12-27

MANAGEMENT AND OPTIMIZATION OF HVAC PLANT IN LUXAIR BUILDINGS (LUXEMBOURG AIRPORT)

Obiettivo

Study and implementation of improvements to HVAC installations in 8 buildings of the LUXAIR company at Luxemburg Airport. Energy savings are expected to reach 40% in older buildings and 25% in recent buildings, i.e. an average 35% in savings.
These savings will be performed partially by retrofitting and upgrading of installations and buildings, partially by computerized energy managements:
- a 10% saving is expected from management of the existing equipment and traditional follow-up of the results (year 1=1985)
- another 15% saving is expected from optimization of the existing equipment by retrofitting and upgrading as well as from the follow-up of the results with adequate management methods (year 2=1986)
- another 10% saving is expected from the optimization of the retrofitted and upgraded equipment by a central microcomputer (year 3=1987).
1. During the project it has been noted that the proposed breakdown (older/recent buildings) was not the best way to assess possible savings. A breakdown according to the occupation (office/hall buildings) is more realistic
- possible savings for office buildings : 35% to 40%
- possible savings for hall (storage & maintenance) buildings : 10 to 20%.
One of the reasons is the different basic indoor temperature for the computation of degree-days (20 deg. C for offices; 2 deg. C for halls). The resulting average savings are rather 30% than the expected 35%.
2. Due to the time schedule it has not been possible to split up savings in the three categories mentioned above (10% - 15% - 10%). A splitting in retrofitting/upgrading and optimization/management by central computer is more realistic. The revised savings are thus 15% + 15% i.e. 111 + 111 TOE/year. Intermediary results show yearly savings of 7.42% for year 1 (1985), 16.84% for year 2 (1986) and 19.26% for year 3 (1987). For years2 and 3, a very large spread of the savings amongst buildings is noted, e.g. from -18% (maintenance hall) to +51% (container terminal). A new interpretation of energy audits resulted in December 1986 in the replacement of a boiler for the maintenance hall; this could explain abnormal results for this building.
3. Occupation time and use of buildings also influence energy consumption. Such parameters have been considered for the adjustment of objectives. The comfort of users have generally been increased by automatic control and time functions which now provide adequate temperatures. Since the equipments did not offer those features in reference years (1982 to 1984), energy consumption will be compared to comsumption of previous years taking into account various comfort parameters.
4. The global annual saving was initially announced at 248 TOE, but this figure was revised at 213 TOE with the new degree-day bases. The results were a saving of 122 TOE (1986), 148 TOE (1987) and 89,4TOE for the heating period 87/88. Taking account of the saving in relation with the non-eligible investment, the saving during the ultime measurement phase (87/88) was 51 TOE for the eligible cost or a ratio of 221 kFLux/TOE to be compared with the expected ratio of 53 kFLux/TOE.
The project involves both retrofitting and upgrading op HVAC plants and buildings and computerized control and management of all the installations.

Phase 1 : Final design. soft and hardware, energy audits.
Phase 2 : Implementation of works.
Phase 3 : Testing and working, including full evaluation of
savings achieved.

Argomento(i)

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Meccanismo di finanziamento

DEM - Demonstration contracts

Coordinatore

A & P KIEFFER
Contributo UE
Nessun dato
Indirizzo
AVENUE PASTEUR 59
2311 Luxembourg
Lussemburgo

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Costo totale
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