What does an elevator mean for the energy consumption?


Is the elevevator energy consumption important?

It is important both as a customer and as a manufacturer to focus on the energy consumption of an elevator. As a customer, this is of course significant in relation to increased electricity costs after commissioning. As a manufacturer, it is essential to have a product that we can be proud of, that meets the standards and is an optimized long-term sustainable solution. For both parties, it is also essential to take responsibility for the climate imprint we leave behind, as the most effective way to reduce its climate impact is to reduce our personal power consumption. You can read more about our sustainable solutions here.

What does the law have to say about energy requirements?

It is only a year ago that energy law requirements for elevators in Denmark were introduced, despite the fact that we ourselves and neighboring countries have long been actively working on the subject. The legal specification reads as follows:

"According to Building Regulations 2018, § 248 (1), energy consumption elevators must not exceed the equivalent of energy class B for either DS / EN ISO 25745-2 or and the German standard VDI 4707 Aufzüge Energieffizienz, March 2009.

DS / EN ISO 25745-2: Elevators, lifts and escalators energy efficiency - Part 2: Calculation of energy for and classification of elevators includes a method for estimating energy consumption based on measured values, calculations and simulations. The German standard VDI 4707 Aufzüge Energieffizienz, March 2009, provides another method for calculating the energy consumption of elevators to be used if the consumption cannot be calculated from DS / EN ISO 25745-2.

According to the Building Regulations 2018, section 248 para. 3, a higher energy consumption for elevator operation than energy class B can be accepted if corresponding compensating energy savings are implemented. This could be, for example, merisolation in the building or installation of solar heating systems, heat pump systems or solar cells. Personal and freight elevators with a rated load exceeding 2,000 kg are exempt from the energy requirement, cf. Building Regulations 2018, § 248 (2). 2nd

Prior to the commissioning of lifts, a functional test of energy consumption must be carried out, which must subsequently be documented in a report. Measurement of energy consumption can advantageously be done in connection with final inspection in accordance with the rules of the Labor Inspectorate. Reference is made here to the Traffic and Housing Agency's guidance on functional testing, cf. Building Regulations 2018, § 249." Source: The Building Regulations

That is, there are many who have already installed elevators that do not meet energy class B, and that you can continue to do so only if you compensate for energy consumption by adding other energy-saving initiatives.

The direct and indirect energy consumption

When talking about the energy consumption of an elevator, you distinguish between direct and indirect consumption. Direct consumption is the control system and the engine when the elevator is actively used, indirect consumption is the energy consumption that is while the elevator is in sleep mode. In fact, an elevator is only used 2-5% of the day, which means that it is important to actively work on avoiding a large waste of energy while the elevator is in hibernation. The biggest energy saving lies in choosing an elevator that does not have too high energy consumption when in operation. Next, the largest energy swallower is the cooling of engine rooms after operation. HYDRO-CON's elevators do not use separate machine space and thus no cooling thereof. Next comes the standby functionality of both control and light in the elevator. HYDRO-CON's lifts turn off everything in the elevator after a short period of time where it is out of service.

Continuous work on energy optimization 

HYDRO-CON works actively daily and continuously with energy optimization of our elevators, if we do not have the solution we will find it. Our elevators are chain- or belt-drawn lifts, unlike the traditional rope-borne or hydraulic. However, this does not necessarily mean that one is more energy-efficient than the other, since it depends on the age of the system, the friction, with and against counterweights, the type of engine and gear, the lift type, and the steering suspension.

To optimize our products, we replace conventional elevator parts with more energy-efficient ones. In this way, we ensure a cheaper energy solution for the consumption and for the consumer. For example, we make mechanical solutions where there is very little friction. We change components that stand and burn energy, we actively work with transformer energy waste, we use only modern grid controls.













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