The Passenger Transfer Efficiency Coefficient (PTEC) for Double Deck Elevators under Incoming Traffic Conditions

One of the sources of efficiency in the operation of double deck elevators is the simultaneous transfer of passengers into and out of the elevator cars, thus leading to a reduction in the value of the round trip time, and thus an increase in the handling capacity. However, due to the randomness of passenger destination selections, this reduction is not optimal. This paper presents this phenomenon as an efficiency coefficient, denoted as the Passenger Transfer Efficiency Coefficient (PTEC) and is representative of the time taken by passengers to alight from the double deck elevator. PTEC is mainly applicable to passengers alighting, rather than passengers boarding. This is true in the case of a single pair of entrances. For the case of multiple pairs of entrances, the PTEC applies to both alighting and boarding operations. A set of equations are derived in order to calculate the PTEC. The results from the equations are verified using the Monte Carlo simulation method. The method of stepwise verification has been used in order to verify the equations.