Elevators have a fair share to play in the green-building concept. Besides the fact that they consume about 2-10% of the total energy used in a building which certainly needs to be lowered down, the concept is also applicable on the material with which elevators are built and the technology and processes involved.
Let us understand how they create an impact and contribute to a sustainable environment.
Invent of Machine-room-less technology led to a sharp decline in energy consumption (up to 80%), cost of setting up an elevator and regular maintenance overheads. In 1990s miniaturization took over and replaced the bulky and expensive machine rooms on top of the buildings with a small MRL machinery right within the elevator shaft. It was time for the cumbersome oil filled hydraulic cylinders used in hydraulic lifts to fade as gearless traction design came into being.
These drives led to a halt in the loss of energy used up by elevators through dissipation of heat. Instead, it recovered the energy and transferred it back to the electrical system of the building to be consumed for lighting and other needs.
Modern elevators ensure that the numbers of light load trips are kept at its minimum while also keeping in view the fact that the waiting time of passengers should not exceed beyond a certain time period. These lifts also control lighting systems effectively while not in use and factor in other energy burning elements.