Hala Mohtasseb - ecologic solutions for urban transit systems

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Hala Mohtasseb - ecologic solutions for urban transit systems

  1. 1. ECOLOGIC SOLUTIONS FOR URBAN TRANSIT SYSTEMSHala Mohtasseb 1
  2. 2. SUMMARY1- URBAN TRANSIT SYSTEMS THE SOLUTION FOR TRAFFIC CONGESTION2- CONCERNS RELATED TO URBAN TRANSIT SYSTEMS ENERGY SAVING HEAT EVACUATION3-MAIN SYSTEMS ONBOARD THE TRAIN INVOLVED4-AIR CONDITIONING SYSTEM AIR-AIR EXCHANGER SOLUTION5- BRAKING RESISTOR ‘SUPER CAPACITORS ‘ SOLUTION 2
  3. 3. URBAN TRANSIT SYSTEMS THE SOLUTION FOR TRAFFIC CONGESTIONTRAFFIC CONGESTIONMORE AND MORE TRAFFIC CONGESTION INCREASE OF CO2 EMISSION NEED TO FIND A TRANSPORTATION SOLUTION TO MINIMIZE CO2 EMISION URBAN TRANSIT SYSTEMS ( METRO AND LRT VEHICLES) IS THE SOLUTION ! FULLY ELECTRICAL SOLUTION 3
  4. 4. CONCERNS RELATED TO TRANSIT URBAN SYSTEMSCONCERNS RELATED TO URBAN TRANSIT SYSTEMS THOUGH NUMBER OF METRO & LRT TRAINS WORLDWIDE IS CONTINOULSLY INCREASING , SOME CONCERNS REMAIN UNSOLVED :1-ENERGY SAVINGSDAILY CONCERN FOR EUROPEAN COUNTRIES2-REDUCTION OF HEAT EVACUATED BY SYSTEMS ONBORAD THE TRAINCONCERN EXPRESSED BY COUNTRIES WITH HIGH TEMPERATURES ESPECIFICALLY GULF COUNTRIESSOLUTIONS TO COVER BOTH CONCERNS 4
  5. 5. CONCERNS RELATED TO TRANSIT URBAN SYSTEMSMAIN EQUIPEMENTS ONBOARD URBAN TRANSIT SYSTEMSMETRO SYSTEM AIR CONDITIONING. BOGIE BRAKING RESISTOR TRACTION SYSTEM BRAKE SHOES BRAKING SYSTEM MOTORS AUXILIRAY INVERTES 5
  6. 6. CONCERNS RELATED TO TRANSIT URBAN SYSTEMSMAIN EQUIPEMENTS ONBOARD URBAN TRANSIT SYSTEMSLRT SYSTEMS AIR CONDITIONING BRAKING RESISTOR TRACTION SYSTEM. BRAKING SYSTEM AUXILIARY INVERTER BOGIE BRAKING SHOES MOTORS 6
  7. 7. CONCERNS RELATED TO TRANSIT URBAN SYSTEMSENERGY SAVING TOPICEQUIPEMENTS ONBOARD WITH HIGHEST ENERGY CONSUMPTION1-TRACTION SYSTEMTO ENSURE DYNAMIC PERFORMANCE REQUESTED2-AIR CONDITIONING SYSTEMHEAT EVACUATION TOPICTOTAL HEAT DISSIPACTION IS MOSTLY DUE TO BRAKING RESISTOR SYSTEM FIND NEW ECOLOGIC SOLUTIONS FOR AIR CONDITIONING SYSTEM AND BRAKING RESISTOR SYSTEM 7
  8. 8. AIR CONDITIONING SYSTEMCALCULATION OF AIR CONDITIONING SYSTEM CAPACITYTWO POSSIBILITIES1- FOLLOWING RECOMMENDATIONS OF EUROPEAN STANDARD EN 14750 -1“Air conditioning for urban and suburban rolling stock – comfort parameters“COUNTRIES ARE CLASSIFIED BY ZONES ;FOR FIXED EXTERIOR PARAMETERS REPRESENTING MOST SEVERE CONDITIONS(Temperature , humidity , solar load ) MAXIMUM INTERIOR TEMPERATURE RECOMMENDED BY THE STANDARD EN 14750-1 SHALL NOT BE EXCEEDED CALCULATION OF THE AIR CONDITIONING SYSTEM CAPACITY NEEDED , WITH RESPECT OF STANDARD EN 14750-1 RECOMMENDATIONS 8
  9. 9. AIR CONDITIONING SYSTEMZone(summer) Maximum ext temper Relative humidityI + 40 40 %II + 35 50%III + 28 45%Maximum mean interior temperature at the design condition °CZone Categ A Categ B category A : fresh air flow rate between 10 and 15 m3/h/passengerI + 30 + 32 category B : fresh air flow rate between 8 and 12 m3/h/passengerII + 30 + 33III + 26 + 29Country SummerAustria Zone IIBelgium Zone IIFrance Zone IIGreece Zone IGermany Zone IIItaly Zone I 9
  10. 10. AIR CONDITIONING SYSTEMCALCULATION OF AIR CONDITIONING SYSTEM CAPACITY2-FOLLOWING CLIENT REQUIRMENTS IN TENDER DOCUMENTS THIS APPLIES TO COUNTRIES NOT REFERRED IN STANDARD EN 14750-1 THIS APPLIES TO GULF COUNTRIESDUBAI METRO / RTA REQUIREMENTS IN TENDER DOCUMENTSLong Term Climate Information Book 2001 (dpt of Civil Aviation of Dubai):From 1984 until 2001 the maximum temperature is 47.5°C 23%.- Data from the Dubai airport (detailed data for year 2003).Maximum temperature in 2003 was 46°C 10%The system must work at 52°C 10%RH with an internal temperature of 27°C. 10
  11. 11. AIR CONDITIONING SYSTEMCALCULATION OF AIR CONDITIONING SYSTEM CAPACITYDUBAI EL SAFOUH TRAMWAY / RTA REQUIREMENTS IN TENDER DOCUMENTSThe outside conditions to be considered in the design are the following: Dry bulb temperature: 47°CFor the other conditions, refer to Appendix B attached to the General Specifications (AnnualClimate and weather in Dubai).,The A/C shall maintain a temperature of less than 25°C during at least 95% of theoperation time in Dubai, at 4 passengers/m2.The tripping value for A/C above 53oC is guaranteed (maximum value 54 oC).=> Difference of temperature of 22°C requested between the interior and exterior High capacity needed for the Air conditioning system to comply with above requirements HIGHER IS THE CAPACITY HIGHER WILL BE ENERGY CONSUMPTION 11
  12. 12. AIR CONDITIONING SYSTEMREDUCTION OF ENERGY CONSUMPTION DUE TO AIR CONDITIONING SYSTEM REDUCTION OF AIR CONDITIONING CAPACITY REDUCTION OF DIFFERENCE BETWEEN THE EXTERIOR TEMPERATURE AND INTERIOR TEMPERATURE REDUCTION OF AIR INLET TEMPERATURESOLUTION : AIR CONDITIONING SYSTEM + AIR-AIR EXCHANGER SYSTEM AIR-AIR EXCHANGER ROOF MOUNTED TO BE INSTALLED NEXT TO THE AIR CONDIONNING SYSTEM 12
  13. 13. AIR CONDITIONING SYSTEMAIR-AIR EXCHANGER SOLUTION 13
  14. 14. AIR CONDITIONING SYSTEMAIR-AIR EXCHANGER SOLUTIONADVANTAGES OF AIR CONDITIONING + AIR-AIR EXCHANGER :1-ENERGY SAVING ( LOWER CAPACITY NEEDED FOR AIR CONDITIONING)3- MTBF DECREASED FOR AIR CONDITIONING SYSTEM TEMPERATURE OF AIR INLET WILL REMAIN LOWER THAN 40°C NO AIR CONDITIONING FAILURES DUE TO HIGH TEMPERATURES2-TOTAL WEIGHT SAVING LEADING TO ADDITIONAL ENERGY SAVINGS WEIGHT DECREASED FOR AIR CONDITIONING SYSTEM WEIGHT DECREASED FOR AUXILIARY INVERTER( system that provides necessary current to onboard equipment) 14
  15. 15. BRAKING RESISTORUSE OF BRAKING RESISTORTRAIN BRAKING PROCESS BY PRIORITY ORDER :1- REGENERATIVE BRAKINGMAINLY ELECTRICAL BRAKING (complemented by mechanical braking at low speeds)Braking energy is regenerated to the line ( voltage 1500 Vd or 750 Vdc) provides energy to the train behind . Total energy saving 1500Vdc REGENERATIVE BRAKING PROCESS 15
  16. 16. BRAKING RESISTORUSE OF BRAKING RESISTORTRAIN BRAKING PROCESS BY PRIORITY ORDER2-HEAT EVACUATION THROUGH BRAKING RESISTORWHEN THE LINE IS NOT RECEPTIVE( case where there is no trains behind to receive energy ) ENERGY MUST BE EVACUATED ENERGY TO BE SEND TO ONBOARD TRAIN BRAKING RESISTORS BRAKING RESISTOR WILL EVACUATE ENERGY BY PRODUCING HEAT 16
  17. 17. BRAKING RESISTORDISADVANTAGES OF BRAKING RESISTORAT TRAIN LEVEL IMPORTANT INCREASE OF AIR TEMPERATURES AT BRAKING RESISTOR LOCATION ENERGY WASTE HIGH WEIGHT OF BRAKING RESISTORSWHEN THE TRAIN RUNS IN A TUNNELTUNNEL TO BE EQUIPPPED WITH ADEQUATE VENTILATORS THERMODYNAMIC STUDY IS A MOST TO DETECT MOST CRITICAL AREAS AT TRAIN LEVEL AND IN TUNNEL 17
  18. 18. BRAKING RESISTORSUPER CAPACITORS SOLUTIONTO COVER ABOVE ISSUES SUPER CAPACITORS IS THE SOLUTION ! ENERGY STORAGE ENERGY STORED COULD BE USED TO SUPPLY OTHER EQUIPMENTS ONBOARD THE TRAIN LOW WEIGHT VERY HIGH RATES OF CHARGE AND DISCHARGE IMPROVED SAFETY BY LOW TOXICITY OF MATERIAL 18
  19. 19. THANK YOU !Hala Mohtasseb 19

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