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Hala Mohtasseb - ecologic solutions for urban transit systems

May 17, 2015

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  • 1. ECOLOGIC SOLUTIONS FOR URBAN TRANSIT SYSTEMSHala Mohtasseb1

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. URBAN TRANSIT SYSTEMSTHE 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. CONCERNS RELATED TO TRANSIT URBAN SYSTEMSCONCERNS RELATED TO URBAN TRANSIT SYSTEMSTHOUGH NUMBER OF METRO & LRT TRAINS WORLDWIDE ISCONTINOULSLY 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 CONCERNS4 5. CONCERNS RELATED TO TRANSIT URBAN SYSTEMSMAIN EQUIPEMENTS ONBOARD URBAN TRANSIT SYSTEMSMETRO SYSTEMAIR CONDITIONING.BOGIEBRAKING RESISTOR TRACTION SYSTEMBRAKE SHOES BRAKING SYSTEMMOTORS AUXILIRAY INVERTES5 6. CONCERNS RELATED TO TRANSIT URBAN SYSTEMSMAIN EQUIPEMENTS ONBOARD URBAN TRANSIT SYSTEMSLRT SYSTEMS AIR CONDITIONING BRAKING RESISTOR TRACTION SYSTEM.BRAKING SYSTEM AUXILIARY INVERTERBOGIEBRAKING SHOESMOTORS6 7. CONCERNS RELATEDTO 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. AIR CONDITIONING SYSTEMCALCULATION OF AIR CONDITIONING SYSTEM CAPACITYTWO POSSIBILITIES1- FOLLOWING RECOMMENDATIONS OF EUROPEAN STANDARD EN 14750 -1Air conditioning for urban and suburban rolling stock comfort parametersCOUNTRIES 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 EXCEEDEDCALCULATION OF THE AIR CONDITIONING SYSTEM CAPACITY NEEDED ,WITH RESPECT OF STANDARD EN 14750-1 RECOMMENDATIONS 8 9. AIR CONDITIONING SYSTEMZone(summer) Maximum ext temper Relative humidityI + 40 40 %II+ 3550%III + 28 45%Maximum mean interior temperature at the design condition CZoneCateg ACateg Bcategory A : fresh air flow rate between 10 and 15 m3/h/passengerI+ 30 + 32category B : fresh air flow rate between 8 and 12 m3/h/passengerII + 30 + 33III+ 26 + 29CountrySummerAustriaZone IIBelgiumZone IIFrance Zone IIGreece Zone IGermanyZone IIItalyZone I9 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 47.5C 23%.- Data from the Dubai airport (detailed data for year 2003).Maximum temperature in 2003 was 46C 10%The system must work at 52C 10%RH with an internal temperature of 27C.10 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: 47CFor 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 25C 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 22C 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 CONSUMPTION11 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 SYSTEMAIR-AIR EXCHANGER ROOF MOUNTED TO BE INSTALLED NEXT TO THE AIRCONDIONNING SYSTEM 12 13. AIR CONDITIONING SYSTEMAIR-AIR EXCHANGER SOLUTION 13 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 40C 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. 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 saving1500Vdc REGENERATIVE BRAKING PROCESS15 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. 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. 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 MATERIAL18 19. THANK YOU !Hala Mohtasseb 19