06. Energy efficient transportation systems – Above Green

(3 credits available)

Aim

To recognise and encourage the specification of energy efficient transport systems.

Assessment criteria

The following is required to demonstrate compliance:

One credit - Energy consumption

Where new lifts, escalators or moving walks (transport types) are specified within refurbishment works:

1.a

An analysis of the transport demand and usage patterns for the building has been carried out to determine the optimum number and size of lifts, escalators or moving walks

1.b

The energy consumption has been estimated in accordance with ISO/DIS 25745 Energy performance of lifts, escalators and moving walks, Part 2: Energy calculation and classification for lifts (elevators) or Part 3: Energy calculation and classification for escalators and moving walks, for one of the following:

1.b.i

At least two types of system (for each transport type required); OR

1.b.ii

An arrangement of systems (e.g. for lifts, hydraulic, traction, machine room-less lift (MRL)); OR

1.b.iii

A system strategy which is 'fit for purpose'.

1.c

The use of regenerative drives should be considered, subject to the requirements in CN8

1.d

The transport system with the lowest energy consumption is specified.

Two credits - Energy efficient features

Criterion 1 is achieved for newly specified lifts.

Lifts

For each newly specified lift, the following three energy efficient features are specified and for existing lifts, at least two of the following energy efficient features are specified:

3.a

The lifts operate in a standby condition during off-peak periods. For example, the power side of the lift controller and other operating equipment such as lift car lighting, user displays and ventilation fans switch off when the lift has been idle for a prescribed length of time

3.b

The lift car lighting and display lighting provides an average lamp efficacy (across all fittings in the car) of >55 lamp lumens/circuit Watt

3.c

The lift uses a drive controller capable of variable speed, variable-voltage, and variable-frequency (VVVF) control of the drive motor.

Where the use of regenerative drives is demonstrated to save energy, they are specified.

Escalators or moving walks

Each newly specified or existing escalator or moving walk complies with, or (in the case of existing) is retrofitted to comply with at least one of the following:

It is fitted with a load sensing device that synchronises motor output to passenger demand through a variable speed drive; OR

It is fitted with a passenger sensing device for automated operation (auto walk), so the escalator operates in standby mode when there is no passenger demand.

Checklists and tables

None.

Compliance notes

Ref	Terms	Description
Applicable assessment criteria
CN1	Part 1: Fabric and structure	This issue is not applicable
CN2	Part 2: Core services	Criteria 1 to 6
CN3	Part 3: Local services	Criteria 1 to 6 This is only applicable where there are transport systems within the refurbishment or fit-out zone. This is not applicable where transport systems are within landlord areas and not within the tenants fit-out zone.
CN4	Part 4: Interior design	This issue is not applicable
General
CN5	Scope of this issue	The criteria relating to lifts do not apply to lifting platforms, wheelchair platform stair-lifts or other similar facilities to aid persons with impaired mobility. However, any lifting device with a rated speed greater than 0.15m/s must be assessed, inclusive of goods, vehicle and passenger lifts. An excluded transport type that demonstrates compliance with the BREEAM criteria would be considered best practice for an energy efficient system (despite not being required for the purpose of awarding the available credits).
CN6	Transport analysis	The transport analysis can be in the form of a written statement justifying the lift selection for the following conditions: where a single lift is provided in a low rise building for the purpose of providing disabled access only; or where a goods lift is selected based on the size of the goods it is intended to carry.
CN7	Building has no lifts, escalators or moving walks	This issue will not be assessed where a building contains no lifts, escalators or moving walks. Where only one of the transport systems is present, the two credits can be awarded where the one system is compliant with the relevant criteria.
CN8	Regenerative drives. See criteria 1.c and 4 .	A regenerative drive should only be considered where it produces an energy saving greater than the additional standby energy used to support the drives. Regenerative drives will typically be appropriate for lifts with high travel and high intensity use.
CN9	Newly specified lifts, escalators or moving walks (transport types)	A newly specified lift, escalator or moving walks includes the installation of transport systems where none existed before and also the replacement of an existing transport system (for lifts this would include where undergoing major works to existing lifts such as moderations to the capacity of the lift). Where there are no newly specified lifts, criterion 1 is filtered out from the assessment.

Methodology

None.

Evidence

criteria	Interim design stage	Final post-construction stage
All	One or more of the appropriate evidence types listed in 4.0 The BREEAM evidential requirements section can be used to demonstrate compliance with these criteria.

Additional information

Relevant definitions

Idle condition: A condition when a lift is stationary at a floor following a run before the standby mode is entered (ISO 25745-1: 2012).
Machine room-less lift (MRL): All equipment is contained in the lift well, not in a separate machine room.
Standby condition - lifts: A condition when a lift is stationary at a floor and may have reduced the power consumption to a lower level set for that particular lift (from ISO 25745-1: 2012). The period between when a lift was last used and when a standby condition is entered is defined in ISO 25745-1 as 5 minutes.
Standby condition - escalators and moving walks: A condition when the escalator or moving walk is stationary and powered on, and it can be started by authorised personnel.

Other information

ISO/DIS 25745 - Energy performance of lifts, escalators and moving walks

ISO/DIS 25745 consists of three parts, under the general title "Energy performance of lifts, escalators and moving walks":

Part 1: Energy measurement and verification
Part 2: Energy calculation and classification for lifts (elevators)
Part 3: Energy calculation and classification for escalators and moving walks.

In Part 1, it has been estimated that approximately 5% of a building's total energy consumption can be attributed to the operation of lifts and a large proportion of this can be attributed to standby mode in many situations. ISO 25745 Parts 2 and 3 have been prepared in response to the rapidly increasing need to ensure and support the efficient and effective use of energy, providing:

A method to estimate energy consumption on a daily and an annual basis for lifts, escalators and moving walks
A method for energy classification of new, existing or modernised lifts, escalators and moving walks
Guidelines for reducing energy consumption that can be used to support building environmental and energy classification systems.