Passenger Elevator Modernize Program II


With destination-selection control, passengers choose a destination floor on terminals located in the elevator lobby or in a corridor adjacent to the elevators. Passengers are grouped together depending on their destinations and the elevator controller system dispatches the most efficient car available, optimizing average waiting time and time-to-destination for passengers. The optimization process groups together riders traveling to the same floors. Passengers are then instructed on which elevators to enter. Other optimization functions include the relative importance of wait time versus transit time, energy conservation, and the reduction of longer waiting periods.

Destination-based elevators offer substantial benefits for passengers as well as property owners and managers. Passengers generally gain shorter time to destination, less crowding, and noticeably quicker rides with fewer stops. For owners and managers, the systems create better functioning properties, reduce operating and energy costs, and improve the marketability of the buildings with potential clients. Destination-selection control systems, when applied in an office environment, offer improved handling capacity during the morning up-peak traffic condition and may enhance leasing flexibility, for example, by making it possible to assign tenants or their clients to different elevators than other tenants or their clients.

Well, an additional technology that should be considered when modernizing an elevator system is the use of closed-loop door operators. The average elevator door opens and closes 200,000 times annually, and more than 70 percent of all elevator repair calls involve elevator doors.

A closed-loop system continually monitors the speed and position of the elevator doors and compares the data to predefined open and close profiles. The system applies varied force as needed when opening and closing the doors as well as the entire motion profile, including acceleration and deceleration, to match the predefined profiles.

Besides, closed-loop systems are unaffected by wind, rain, temperature changes, seasonal barometric pressure changes resulting in a "stack effect," and small debris in the track, thus increasing door reliability. Additionally, door components will be subject to less wear as the Buy Elevator system prevents doors from slamming shut due to changing environmental conditions.

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