Heat Loads Uncertainties Heat Transfer Distribution Air Water
Heat Loads - Uncertainties Heat Transfer Distribution - Air & Water - Air Waveguides (DB) 12% MBQ Small (DB/K) Water Future 88% No Changes Simulations MBQ Big (DB/K) Accelerating S. (K) LOADS (K) Pulse C&D (K) Modulator (K) Klystron (K) Ext. Curves No Changes ? 5% 95% Simulations ? 1
Heat Loads - Uncertainties Heat Transfer to Air - Cables DBQ Cables (DB) MBQ Cables (DB/K) Supply Cables State Markus' Values Davide’s Value Adopted 6, 3 W/m 40 W/m 19, 4 W/m Assumed ? Estimation 2
Heat Loads - Uncertainties Heat Transfer – Tunnel or Alcoves? (DB/K) • Controller - MBQ Stabilization System • Mini Pumps – Vacuum System 3
Heat Loads - Uncertainties DBQs and Simulations (DB) 1. The DBQs were not properly simulated 2. However, we are using those results 3. In the future we will have new values 4
Heat Loads to Air - Results Heat Transfer to Air (DB) Case Air [W/m] 25°C & Mini Pumps and Controllers IN 280, 5 25°C & Mini Pumps and Controllers OUT 242, 2 30°C & Mini Pumps and Controllers IN 196, 5 30°C & Mini Pumps and Controllers OUT 158, 1 38, 3 W/m Heat Transfer to Air 5
Finding a Solution - Goals 1. Effective Cooling and Ventilation 2. Avoid Major Costs and Complications • Avoid building additional alcoves • Avoid increasing the cross section 3. Enhance Energy Efficiency and Savings 4. Consider O&M aspects • The fewer equipment the better • Easy accessibility • Redundancy 6
A Feasible Solution Proposed Solution • • No additional alcoves Lower number of AHU and Equipment Better accessibility and possible redundancy Energy efficiency should be equivalent to other solutions 7
A Feasible Solution OK Case 25°C & Mini-Pumps and Controllers IN 25°C & Mini-Pumps and Controllers OUT 30°C & Mini-Pumps and Controllers IN 30°C & Mini-Pumps and Controllers OUT Air [W/m] 280, 5 242, 2 196, 5 158, 1 D [mm] 1250, 0 1200, 0 1100, 0 1000, 0 8
A Feasible Solution 9
Setting Tamb Qualitative Analysis This solution is the most satisfying considering our initial goals • To implement this solution we know : 1. There is a minimum Tamb (or admissible heat to air) • Dependent on space for ducts – Civil E. (? ) 2. There is a maximum Tamb • • Dependent on safety issues – HSE Dependent on equipment requirements – ? 10
Setting Tamb Qualitative Analysis v Tamb will be within this range – further analysis is required to set a solution in this interval 11
Conclusions 1) There are uncertainties in the Heat Loads as we have listed 2) We worked in an interval of values to deal with those doubts (we hope to have set a valid interval) 3) We suggested a solution that is feasible for the current interval of heat loads and for Tamb higher than a certain value, defined by the space to fit the ducts 12
Conclusions 4) A maximum Tamb will be set by safety and equipment requirements 5) Further analysis is necessary to find Tamb within that range 13
Current Requests Markus, Alex Davide Bozzini Matthew (? ) Equipment (? ) HSE K. Artoos C. Garion Air / Water: MBQ, waveguides, DBQs, Klystron, Modulator, Pulse C&D, Loads and AS (Klystron) Air: MBQ, DBQ cables Air: Supply cables Max. allowed diameter in the tunnel Max. allowed Tamb Smoke extraction / Fire F. Controller - Power S. placing Mini Pumps - Power S. placing 14
Future Requests v All the remaining heat loads, including alcoves 15
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