The energy performance of logistical platforms
The Orygeen teams have worked on:
The replacement of the totality of interior and exterior lighting of a storage platform for vehicles to economise over 70% of the lighting budget of the site without any client investment.
The renovation of the heating system of a logistial platform of chemical products to allow the storage of new products and to improve the comfort of operators.
The installment of a solution of solar plant on the roof of a refrigeration logistical platform to cover 30% of the electrical consumption of a site.
The construction of an optimisation strategy of lighting of the totality of 20 logistical platforms in Europe has allowed the transition to LED for an investment inferior to 30% of the initial budget.
Like with any other building, the bulk of the consumption of a logistical platform is linked to lighting, to air conditioning and heating. When it comes to cold warehouse however, the production of cold represents more than half the consumption.
Compared to the other types of buildings, the logistical platforms have 2 main characteristics with a direct impact on the energy performance solutions: buildings have large surfaces with high ceilings.
To maximise the energy efficiency of a logistical warehouse, 4 things must be acted on:
1. The lighting
Architecturally simple, a logistical platform has 3 specificities in terms of lighting:
- the height of the installation,
- a surface that is not always occupied or used, inducing a challenge for lighting in relation to the occupancy or use,
- a high-rise storage system that generates shadows.
Lighting weighs heavily in the electrical consumption of a logistical platform with generally disposes of little natural light so it must possibly be lit 24/7.
The transition to LED allows the realisation of spectacular energy efficiency progress, even if the choice of LED solutions, their implementation, along with the associated monitoring system, will have a big influence on the investment, the quality of lighting, and the importance of the economies made.
Example in a logistical storage warehouse of mechanical parts: implement LED lighting associated to a motion detection system has allowed the reduction of electrical consumption associated with lighting by 90% with a return time inferior to 3 years.
2. The heating, ventilation and air conditioning (CVC)
If few logistical warehouses are air conditioned, heating easily poses a problem with this kind of site: inefficient in terms of comfort, it is often an over-consumer of energy.
The combination of large surfaces and high ceilings makes the choice of an adapted heating system more complex, as with the volume to heat and the effects of stratification, hot air rises.
Doors that open and shut regularly in a warehouse also pose a problem with air circulation. Aeronautical modelling could be interesting to help install and implement a ventilation, heating and air conditioning system which is perfectly adapted.
Example of a 12000 m2 warehouse: replacing an ancient heating system with a gas heating system in the exterior of the building allows the significant improvement of team comfort all while allowing the broadening of regulatory authority for new products and reducing consumption.
3. The production of cold
Beyond the intrinsic performance of cold groups, the refrigerated warehouses often have performance problems linked to the quality of isolation and to thermal bridges.
Resorting to the inertia of cold can allow the storage of energy to gain value in a flexibility contract or to combine it to photovoltaic in order to improve its sustainability (by maximising the use of energy produced during the day).
Example of a cold warehouse for dairy products:diminishing by 20% the consumption of electricity linked to cold by the implementation of HP and BP floating solutions as well as optimisation via an ad hoc software.
4. The solar self-consumption
In very homogenous buildings with large surfaces of terraced roofs, it is easy to instal large capacities of solar plants as long as the structure of the roof supports the installation and that the quality of waterproofing permits it.
Example on the roof of a logistical warehouse in Valencia, Spain: the installation of photovoltaic panels has allowed the covering of 70% of the electrical consumption of the site at a fixed price over 15 years significantly inferior to that of the network.
An energy challenge?