Modernization of Elevators in Buildings
Motors and Drives
Measure Goal
The goal of this document is to systematically estimate the electricity savings triggered by partial or complete renovations (replacement of the entire system) of an elevator system with a more efficient system.
Examples and Scenarios
Replacement of an elevator (rope) with a lifting height of 75 m (20 stops) and a payload of 1,500 kg (50% counterweight) with a new rope system with the same payload in a multi-family house with 54 apartments
Inputs
Beschleunigung der alten Anlage: 1.0 m/s²
Renovation of the drive system of an elevator (rope) with a lifting height of 25 m (7 stops) and a payload of 1,000 kg (50% counterweight) in an office building
Inputs
Motor Baujahr 2002 → IE4, Getriebe: Planetengetriebe → Direkt, FU (< 2005) → FU, Rekuperation: Nein → Ja
Requirements
Only measures that meet the requirements of the Energy Ordinance (SR 730.01; EnV) can be credited. The additional requirements for the technical characteristics and for the implementation of the measure are set out in Table 1.
| Efficiency (full refurbishment) | The new lift installation must achieve at least energy efficiency class A according to ISO 25745-2:2015 |
|---|---|
| Efficiency (partial refurbishment) | The best available technology of the refurbished components must be used, including: |
| Drive systems | |
| Travel control | |
| Door control | |
| Implementation | The replacement and commissioning of the new system must be carried out by a qualified specialist or company. |
Proof of compliance
Compliance with the requirements must be demonstrated by the following documents. The documents listed in Table 2 are an integral part of the proof of measure implementation.
- 1.Extract from the CalcuLift calculation aid or an equivalent calculation aid in accordance with ISO 25745-2:2015 (PDF format)
- 2.Technical data sheets of the refurbished components (for partial refurbishments) or of the installation (for full refurbishments) (PDF format)
- 3.Invoice documents (PDF, PNG or JPEG format)
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ContactSymbols, Terms and Units
| Symbol | Description | Unit |
|---|---|---|
a | Acceleration | m/s² |
dop | Number of operating days | d/a |
g | Standard gravitational acceleration | m/s² |
j | Jerk | m/s³ |
Ė | Power consumption | W |
E | Electricity consumption | Wh oder kWh |
ΔEeco | cumulative electricity savings | kWh |
f | Factor | — |
F | mechanical power | W |
kL | Load factor | — |
mcb | Cabin weight | kg |
mcm | Counterweight | kg |
Ns | Standard effective duration | a |
nd | Number of trips per day | — |
R | Time ratio | — |
sav | average lifting height | m |
tnr | daily idle/standby time | h/d |
trd | daily running time | h/d |
td | Door opening time | s |
v | Rated speed | m/s |
η | Efficiency | — |
Calculation Formulas
Creditable Electricity Savings
The cumulative electricity savings result from the difference between electricity consumption before and after the measure, multiplied by the reduction factor (0.75) and the standard effective duration.
Annual Electricity Consumption
Annual electricity consumption is calculated based on the number of annual operating days, daily idle/standby consumption and operating consumption.
Betriebsmodus
Daily electricity consumption in operating mode is calculated based on the number of daily trips, the load factor and the average cycle consumption.
Leerlauf/Standby-Modus
Daily electricity consumption in idle/standby mode is calculated based on power consumption and time ratio in idle mode, after 5 minutes and after 30 minutes in standby mode.