1. Engineering Department EN Cooling and Ventilation issues 1 FUTURE EXPLOITATION OF THE EAST AREA EN-CV Michel OBRECHT

2. Engineering Department EN Cooling and Ventilation issues  Objectives  Ventilation  Cooling  Conclusion

3. Engineering Department EN 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 circuit for the primary zones

4. Engineering Department EN 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 kW80.000 m 3 /h  Radiant panels :625 kW Ratio : 0,39 W/m 3 *K (SIA 380 standard : Ratio : 0,06 W/m 3 *K) Barracks and Offices :  9 split system :45 kW

5. Engineering Department EN Ventilation : Upgrade of the existing HVAC system for the next 25 years HVAC existing system :

6. Engineering Department EN Ventilation : Upgrade of the existing HVAC system for the next 25 years HVAC existing system :

7. Engineering Department EN Ventilation : Upgrade of the existing HVAC system for the next 25 years Situation actuelle Augmentation Actuel/Origine Situation d'origine LocalTypeElément Déperd. [W] Déperd. [%] LocalTypeElément Déperd. [W] Déperd. [%] Hall 157 1 253 974 100%59% Hall 157 789 521 100% Transmission875 92770%42%61% Transmission544 94669% Mur en béton46 6494%0% Mur en béton46 6496% Vitrage simple fixe244 28219%0% Vitrage simple fixe244 28231% Durisol27 9092%0% Durisol27 9094% Durisol pignon40 2653%0% Durisol pignon40 2655% Eternit101 9268%10%347% Eternit22 8113% Toiture405 61032% 164% Toiture153 74419% Pont thermique9 2861%0% Pont thermique9 2861% Renouve llement d'air 378 04630%17%55% Renouve llement d'air 244 57531% Renouvellement155 59512%0% Renouvellement155 59520% Perméabilité222 45218%17%150% Perméabilité88 98111% Heat deperditions : calculation notes

8. Engineering Department EN Ventilation : Upgrade of the existing HVAC system for the next 25 years Proposed solution :  keep the existing configuration  replace :  the 8 AHU  the overheated distribution network  the electrical installation  the instrumentation and PLC  the barracks HVAC system  upgrade the inslulation and the tightness of the building (GS issues)

9. Engineering Department EN Ventilation : Upgrade of the existing HVAC system for the next 25 years Proposed solution, Cost estimation : Ventilation : Upgrade of the existing HVAC system 984 795 Uni t Quantit y Unit Price Ratio/A HU Total Price [CHF] Contengencies 5%937 900 1. AIR HANDLING 727 900 1.1 AIR HANDLING UNITS 473 000 AHU Hallass.835 000 280 000 AHU Barrackass.915 000 135 000 AHU Officeass.25 000 10 000 Extracteurass.412 000 48 000 1.2 AIR DUCTS 83 000 AHU Hallass.86 000 48 000 AHU Barrackass.75 000 35 000 1.7 ELECTRICITY AND REGULATION20%94 600 1.8 INSTRUMENTATION10%47 300 1.9 DESIGN DOCUMENTATION TEST 30 000 2. OVERHEATED WATER NETWORK 120 000 2.1 PIPING + ACCESSORIES + PUMPS 120 000 2.10 SAFETY 3. RADIANT PANNEL 40 000 3.7 ELECTRICITY AND REGULATION 40 000 4. DEMINERALISED WATER NETWORK 50 000 4.2 ACCESSORIES 50 000

10. Engineering Department EN Ventilation : Installation of air conditioning system for the primary zones No existing system Proposed solution : similar to nTOF target zone Primary zone in underpressure HVAC system including safety filtration on air ectraction Cost estimation :260 kCHF Key point : Air tightness of the primary zone (GS improvement)

11. Engineering Department EN Cooling : Separation of the cooling circuit for the primary zones RP requirement : avoid contamination of external demineralised water network User requirement : maintain the existing inlet temperature head loads : 700 kW

12. Engineering Department EN Cooling : Separation of the cooling circuit for the primary zones Proposed solution : Installation of a dedicated demineralised water cooling system for the primary zones including 2 cooling towers Cost estimation :1.300 kCHF including civil works

13. Engineering Department EN Cooling and Ventilation issues Conclusion Cost estimation : Upgrade of the existing HVAC system 985 kCHF Installation of air conditioning system for the primary zones 260 kCHF Separation of the cooling circuit for the primary zones1.300 kCHF Manpower :1,25 FTE over 12 months Related points : Building infrastructure improvement Barracks refurbishment

14. Engineering Department EN Cooling and Ventilation issues Thank you for your attention