engineering department en cooling and ventilation issues 1 future exploitation of the east area...
TRANSCRIPT
En
gin
eeri
ng
Dep
art
men
tEN
Cooling and Ventilation issues
1
FUTURE EXPLOITATION OF THE EAST AREA
EN-CV Michel OBRECHT
En
gin
eeri
ng
Dep
art
men
tEN
Cooling and Ventilation issues
Objectives
Ventilation
Cooling
Conclusion
En
gin
eeri
ng
Dep
art
men
tEN
Objectives
Ventilation :
Upgrade of the existing HVAC system for the next 25 years
Installation of air conditioning system for the primary zones
Cooling :
Separation of the cooling water circuit for the primary zones
En
gin
eeri
ng
Dep
art
men
tEN
Ventilation : Upgrade of the existing HVAC system for the next 25 years
HVAC existing system :Main Building :
heating system connected to the overheated water network Distribution network 8 Air Handling Units : 560 kW 80.000 m3/h Radiant panels : 625 kW
Ratio : 0,39 W/m3*K(SIA 380 standard : Ratio : 0,07 W/m3*K, 18% of existing)
Barracks and Offices :9 split system : 45 kW
En
gin
eeri
ng
Dep
art
men
tEN
Ventilation : Upgrade of the existing HVAC system for the next 25 years
HVAC existing system :
En
gin
eeri
ng
Dep
art
men
tEN
Ventilation : Upgrade of the existing HVAC system for the next 25 years
HVAC existing system :
En
gin
eeri
ng
Dep
art
men
tEN
As build Existing Target SIA
Maximum Heat losses [kW] 800 1200 490 216
Energy consumption [gWh/y] 2000 3000 1200 540
Energy cost [kCHF/y] 200000 300000 120000 54000
Cost saving [kCHF/y] 100000 0 180000 246000
Ventilation : Upgrade of the existing HVAC system for the next 25 years
Heat deperditions : improvements are needed for air tightness and insulation
In order to avoid waste of energy and to improve ambient conditions,the insulation and the air tightness of the building has to be improved.
En
gin
eeri
ng
Dep
art
men
tEN
Ventilation : Upgrade of the existing HVAC system for the next 25 years
Proposed solution :keep the existing configurationimprove the thermal performance of the building to as build
situation replace :
the 8 AHU the overheated distribution network the electrical installation the instrumentation and PLC the barracks HVAC system
Cost estimation : 985 kCHF
En
gin
eeri
ng
Dep
art
men
tEN
Ventilation : Installation of air conditioning system for the primary zones
No existing system
Proposed solution : similar to nTOF target zone
Primary zone in underpressure <50 PaHVAC system including HEPA filtration on air extraction
Cost estimation : 260 kCHF
Without proper air tightness, the underpressure and the static confinment shall not be achieved nor guaranteed
En
gin
eeri
ng
Dep
art
men
tEN
Cooling : Separation of the cooling water circuit for the primary zones
RP requirement : avoid contamination of external demineralised water networkUser requirement : maintain the existing inlet temperature (25°C in summer) head loads : 700 kW
En
gin
eeri
ng
Dep
art
men
tEN
Cooling : Separation of the cooling water circuit for the primary zones
Proposed solution :
Installation of a seperate water circuit for primary beamsIncluding a new cooling station separated from the existing one
Cost estimation : 1.200 kCHF
Study to estimate water activation to be performed by RPTo be validated :• Operating modes (drains, access, maintenance, ...)• Location of new cooling towers, heat exchangers, pumps, ...
En
gin
eeri
ng
Dep
art
men
tEN
Cooling and Ventilation issuesConclusion
Cost estimation :Upgrade of the existing HVAC system 985 kCHFInstallation of air conditioning system for the primary zones 260 kCHFDedicated cooling circuit for the primary zones 1.200 kCHF
Manpower : 1,25 FTE over 12 months
Taking into account the CV workload until the end of LS1 and priorities defined for that period, the project cannot start in the coming months
Related points :Building infrastructure improvementBarracks refurbishment